Format for Protection Audit - wrpc.gov.in · 1 2 3 4 5 6 7 8 9 10 11 12 13 Yes/ No Whether attended...

No. of Defectsin Category A

AttendedYes/NO

Reason fornotattended


AttendedYes/NO


1 132KV Barwala 132 22/6/122 132KV Paliyad 132 19-20/6/123 220KV Dhasa 220 07/12/20124 220 KV Botad 220 17/7/20125 132KV Vallabhipur 132 21/6/126 220KV Otha 220 07/05/20127 220KV Savarkundla 220 16/7/20128 220KV Sagapara 220 07/06/20129 220KV Vartej 220 07/10/2012

10 220KV Anjar 220 22/11/201311 132 KV Samakhiyali 132 23/05/201212 220KV Shivlakha 220 26/12/201313 220 KV Kukma 220 25/12/201314 220KV Nakhatrana 220 20/12/201315 220KV Nanikhakhar 220 27/12/201316 220KV Tappar 220 23/12/201317 132KV Ankleshwar 132 24/9/1218 132KV Valia 132 23/8/1219 220KV Acchalia 220 29/9/1220 220 KV Wagra 220 09/06/201221 220KV Dahej 220 20/9/1222 220KV Kim 220 09/05/201223 220KV Zagadia 220 22/9/1224 220KV Haldarwa 220 09/07/201225 132KV Bharuch 132 18/9/1226 132KV Wankaner 132 14/02/201427 220KV Lalpar 132 02/07/201428 132KV Jasdan 132 15/02/201429 132KV Dhrol 132 02/04/201430 220KV Gondal 220 22/02/201431 132KV Vajdi 132 03/05/201432 220KV Nyara 220 26/02/201433 132KV Vikram 132 02/07/201434 220KV Morbi 220 02/05/2014

Format for Protection AuditName of Utility: Gujarat Energy Transmission Corporation Ltd.

Sr.No.

Name of CircleName of the Substationidentified for audit

S/SVoltage

(KV)

Date on which auditconducted/completed

Observations ofProtection Audit

Remark(Defect)

Deficiences that involves procurment(Category B)

Amreli

Circle/ substaionwise

observation reportenclosed herewith.

NA

No. of Defects:-77Attended(nos.):-77Pending(nos.):- 0

Anjar



NA


Nil NA

NANil9797

Bharuch



NA


Gondal



NA


NANil

NANil7878

Deficiences that can becorrected without procurment

(Category A)

77 77

35 35


AttendedYes/NO



AttendedYes/NO


Sr.No.


S/SVoltage

(KV)



Remark(Defect)



(Category A)

35 132KV Idar 132 19/6/1236 132KV Visanagar 132 20/6/12

06/10/201206/10/2012

39 220KV Bhutiya 220 27/6/1240 220KV Jamla 220 30/6/1241 220KV Vijapur 220 22/6/1242 220KV Dhansura 220 07/04/201243 132KV Talod 132 23/6/1243 132 KV Tilakwada 132 30/4/1344 132 KV Vasedi 132 05/03/201345 220KV Godhra 220 22/5/1346 132KV Dahod 132 05/07/201347 220KV Jambuva 220 24/05/201348 220KV Chandrapura 220 24/5/1349 220KV Gavasad 220 25-6-201350 132KV Gotri 132 07/02/201351 220KV Waghodia 220 30/6/201352 132KV J' Nagar 132 31-6-201353 132KV F"Nagar 132 06/11/201354 132KV Karjan 132 07/03/201355 132KV Manjusar 132 30-6-201356 132 KV Limkheda 132 06/02/201357 132KV Nandesari 132 07/04/201357 220KV Ranavav 220 20/02/201458 132KV Bhatia 132 21/02/201459 220KV Jamnagar 220 14/02/201460 132KV Khambhalia 132 14/02/201461 132KV Naghedi 132 14/02/2014

38 220KV Agiyol 220


28 28 Nil

Himmatnagar



NA


Jambuva



NA

No. of Defects:-125Attended(nos.):-125

Pending(nos.):-

Jamnagar



NA

93 93

NA

Nil NA

125 125 Nil NA


AttendedYes/NO



AttendedYes/NO


Sr.No.


S/SVoltage

(KV)



Remark(Defect)



(Category A)

62 132 KV Bhayavadar 132 18/8/1263 132KV Junagadh 132 09/07/201264 220KV Keshod 220 09/08/201265 132 KV Dhoraji 132 22/8/1266 220KV Motipaneli 220 24/08/201267 220KV Sardargadh 220 09/07/201268 220KV Visavadar 220 25/6/1269 132KV Haripur 132 26/6/1270 132KV Talala 132 27/6/1271 220KV Timbdi 220 07/02/201272 220 KV Kansari(Dhokalva) 220 07/04/201273 132 KV Patan 132 12/02/201374 132 KV Siddhpur 132 27/11/201375 220KV Kheralu 220 26/12/201376 220KV Sankhari 220 29/11/201377 220KV Chhatral 220 21/11/201378 220KV Mehsana 220 21/12/201379 220KV Mitha 220 12/10/201380 132 KV Sabarmati 132 05/12/201281 220KV Salejada 220 30/5/1282 132KV Ode 132 30/4/1283 132KV Undel 132 20/05/1284 220KV Kapadwanj 220 06/09/201285 220 KV Bhat 220 31/05/1286 132KV Narol 132 22/05/1287 132KV Chiloda 132 24/7/12

90 132KV Mahemdabad 13219/05/12,15/7/2012

91 220KV Khanpur 220 19/7/1292 132KV Nadiad 132 18/05/12

88 220KV Karamsad 220 29/4/12

89 220KV Ranasan 220

Junagadh



Mehsana



Nadiad

17/05/12


observationreport

enclosed herewith.

NA


Pending(nos.):-0

NA


NANo. of Defects:-41Attended(nos.):-41Pending(nos.):- 0

89 89 Nil NA

41 41 Nil NA

266 266 Nil NA


AttendedYes/NO



AttendedYes/NO


Sr.No.


S/SVoltage

(KV)



Remark(Defect)



(Category A)

93 220KV Bhilad 22094 220KV Talangpore 220 08/06/201395 220KV Ambheta 220 25/5/1396 132KV Atul 132 16/05/1297 132 KV Bhestan 132 06/10/201398 220KV Ichhapore 220 06/07/201399 220KV Mota 220 05/11/2013

100 220KV Navasari 220 22/5/13101 220KV Vapi 220 09/02/2013102 220KV VAV 220 05/09/2013103 220 KV Thavar 220 09/05/2012104 220KV Tharad 220 09/01/2012105 132 KV Deesa 132 09/06/2012106 220KV Deodar 220 09/11/2012107 220KV Jangral 220 25/8/12108 220KV Palanpur 220 22/8/12109 220KV Radhanpur 220 14/9/12110 220KV Agarthala 220 29/8/12111 132KV Dhandhuka 132 29/1/2013112 132KV Sitagadh 132 30/1/2013113 132KV DHANKDHRA 132 23/1/2013114 220KV Halvad 220 25/1/2013115 220KV Limbdi 220 31/1/2013116 220KV Viragam 220 28/02/2013117 220 KV DUDHREJ 220 02/02/2013118 220 KV RAJPAR 220 02/05/2013119 220 KV BALA 220 02/06/2013120 220 KV ADALSAR 220 23/01/2013121 220 KV DHANKI 220 03/05/2013


Pending(nos.):-0

Navsari



NA


Palanpur



NA


Surendranagar



NA120 120 Nil NA

90 90 Nil NA

52 52 Nil NA

1 2 3 4 5 6 7 8 9 10 11 12 13

Yes/No

WhetherattendedYes/No

If notattended,

reason

Yes/No


If no, expecteddate to attend

1 Wardha 220Faulty Annuciators shall be replacedimmediately

Yes Yes Completed.Replaced on dt.15.09.2014

Completed.

2 Hinganghat 220The annunciator of 220kV TSS-I & Waroraare out of service which need to be replacedimmediately.


Completed.

3 Warora 220The Differntial relay of 220/33kV 50MVA T/F-II shall be replaced


Completed.

4 Khaperkheda 400 The NDR relay shall be replaced Yes Yes Completed.Replaced on dtd.07.06.2014

Completed.

5 Koradi 400 The NDR relay shall be replaced Yes Yes Completed.Replaced on dtd.11.06.2014

Completed.

400kV PGCIL CKT I & II -Broken Conductor Detection is off.

Yes Yes Completed.

400kV PGCIL CKT I & II - ZONE 3 & ZONE 4trip time is same to 1S .

Yes Yes Completed.

Present Status as on30/06/2017

Present Status of Protection Audit Deficiencies (A & B type) in MSETCL for the year 2012-13

Sr.No.

Name of S/sidentified for

ProtectionAudit

S/svoltage

(kV)Observations of protection Audit

Deficiencies that can becorrected without procurement

(Category-A)

Deficiencies involvingprocurement (Category-B)

Status as on 30/11/2016

6 Girwali 400

Name of Zone

Nagpur

Aurangabad

1 2 3 4 5 6 7 8 9 10 11 12 13

Yes/No


If notattended,

reason

Yes/No


If no,expecteddate toattend

Follwg relays found faulty: i)REC670 (oneno) of 33kV fdr ii) REC670 (HV b/u) &RET670 (LV b/u) of TF-1.

-- -- -- Yes Yes

Relays at i) & Ii) replaced &RET670 is confirmed to be inworking condition but displayis not ok.__ Completed

Communication of 6 nos of 33kV bays withSCADA has failed.

-- -- -- Yes No

The SCADA is not working properly (DRcomputer does not communicate with SASPC)

-- -- -- Yes No

2 Patur 132kVDisplay unit of Bus bar relay ABB-REB 670 isfaulty.

-- -- -- Yes NoThe new display unit receivedat SS, the services of ABBrepresentative is awaited.

3 Karanja 132kVSCADA system not working properly, getshanged frequently, Communication of Busbar bay unit of TBC with SCADA has failed

-- -- -- Yes NoM/s ABB reprentative isrequired and matter is beingfollowed up with M/s ABB.

TF Electromechanical relay should bereplaced by Numerical relay.

-- -- -- YES YES Completed

Distance relay is Faulty of 132kV I/C -I from220kV Jalna S/S.

-- -- -- YES NOOn receipt of

relayrelay requirement submitted

Dist. Relay is still awaited.

132/11kV, 25MVA TF the REF Protection iswired out in HV B/up protection core.

-- -- -- YES NOOn receipt of

bus barscheme

REF relay is by passed and willbe taken in service oncommissioning of numericalbusbar.

REF protection is by passed asturret CTs not provided on TFHV Bushing and will be takenin service on commissioningof numerical Busbar

Actual Distance Measurement for Waghala-Pusad line to be checked with Tarus.

YES YES -- -- -- Completed

6 220kV Parbhani 220kV220kV Parbhani-Hingoli line length waswrongly feed.

YES YES -- -- -- Completed

7 132kV Hingoli 132kV132/33kV 50MVA TF-I & TF-II haveElectromehanical Differential and HV - LVBack up relay

-- -- -- YES YES Completed

8132kV

Jangamwadi132kV 132/11kV 25MVA Apex TF Main PRV faulty -- -- -- YES YES Completed

9 132kV Elichpur 132kV ABB make SCADA not in Service -- -- -- YES NOMatter taken up with M/S ABB.Order to be issued

Matter taken up with M/S ABB.Order is issued by O&M

Name of zone

Amravati

Aurangabad

5 220kV Waghala 220kV

1 Wani 220kV

4 Jalna MIDC 132kV

31.12.2016

Not complied. M/s ABBreprentative is required andM/s ABB is not responding.Matter is being followed upwith M/s ABB.

Present Status as on30/06/2017


Sr.No.


ProtectionAudit

S/svoltage


Deficiencies that can becorrected without

procurement (Category-A)

Deficiencies involvingprocurement(Category-B)

Status as on 30/11/2016

M/s ABB reprentative isrequired and M/s ABB is notresponding. SCADA at WaniSubstation is included in PAClist.

10 220kV

Ogalewadi220kV

Autoreclosure feature not operational on220kV Karad-II line for Siemens SIPROTEC7SA522 relay.

Yes Yes - - - Not attended

Attended.AR Configuration was carried

out & during trials ARoperates on Ph to Ph fault.

Same will be attended shortly.

11 220kV

Malharpeth220kV

Autoreclosure feature not operational on220kV Karad line for Siemens makeSIPROTEC-7SA611 type distance relay.

Yes No - 31.12.2016

Not attended (SIPROTEC-7SA611 relay commissionedbut CB is more than 25 Yrs.Old)

CB repalced on 23.06.2017. ARconfiguration is balanced.

Non working of Auto DR for 315 MVA ICT II YES YES - - - Completed

DGA testing of ICT YES YES - - - Completed220kV Ichalkaranji 2 LBB relay retroffiting - - - YES YES Completed500 MVA (167 x 3 ) ICT 3 NDR relayretrofitting

- - - YES YES - Completed

GPS synchonisation of Relays YES Yes - - - Completed400kV Karad-Lonikand Line Autoreclosernot in service.

YES YES - - - Completed

Non working of Auto DR for 315 MVA ICT II YES Yes - - -Matter taken with Siemens byDn. Level.

Completed

GPS synchonisation of Relays - - - YES YES - Completed315 MVA ICT I&II NDR relay retrofitting - - - YES YES Completed

Stage IV Zone-1-Main-I, Main-II uniformity YES YES - - - Completed

15220kV

Gadchandur220kV

Most of the Kiosk(CT, PT , MB) are foundgrounded.

- - - Yes Yes Completed Completed Completed

The equipments having abnormal tan deltavalues shall be replaced.

Yes No - - CompletedCompleted

(4 nos. CTs are replaced inMarch-16)

Completed

The cell no:- 6 of 220V DC set no:-1(efficiency:- 60%) found defective (Sp. Gr.:-1140) also cell no:-42 & 102 are bypassed-need to be replaced.

- - - Yes No Completed Completed(Faulty cells are replaced byreconditioning.)

Completed

17 220kV Warora 220kVThe Differntial relay of 220/33kV 50MVAT/F-II shall be replaced

- - - Yes Yes Completed Replaced on dt. 16.09.2014 Completed

18400kV

ChandrapurGCR

400kVBattery 220V Set 1 Cell no.36 is in poorcondition & need to be replaced.

- - - Yes Yes Completed Replaced on dt. 14.01.2016 Completed

19 Pune220kV

Kurkumbh220kV Bus Bar protection panel is not provided Yes yes Completed Attended. Attended.

16 220kV Ambazari 220kV

Karad

Nagpur

14400kV New

koyna

12 400kV Talandge 400kV

12 400kV Karad

1 2 3 4 5 6 7 8 9 10 11 12 13

Yes/No

Whether

attended

Yes/No

If notattended,

reason

Yes/No

Whether

attended

Yes/No

If no,expecteddate toattend

Directional E/F setting to beadopted in Bhusawal &Nandgaon Peth Bay.

Yes Yes … …Two nos of binary outputconfigured for operationof main and tie triprelay.Directional E/F isenabled.

STUB Protection to beenabled in Nandgaon Peth &Bhusawal Relay.

Yes Yes … … STUB protection isenabled.

Harmonic restraint featurenot adopted in both H.V. &L.V. Back-Up Relay

Yes Yes … …Services of SiemensEngineer required.

Harmonic restraintfeature is enabled inbackup relays of bothICTs

Importat digital signals arenot included in DR ofNandgaon peth, Bhusawal &ICT bay.

Yes Yes … …Required changes in settingfile of relay is carried outoffline. However forconfiguration outage ,services of siemensengineer isrequired.Requirementalready sent to TheExe.Engg 400KV RS Division,Akola.vide Letter Ref No:-Addl.EE/400KV/TestingUnit/Akola/Tech/FNo.09/No. 82 Date:-29/09/14 Email on dt3.03.16 & 24.05.16

All signals are included inDR of Nandgaon andBhusawal bay

Wide variation in LBBcurrent detector setting.

… … … … … … Matter is taken up with M/SPGCIL.

Completed

2 400kVGirwali

400/220kV

For 400kV Solapur line zone4 & broken conductordetection functions are OFFin M-1 & M-2. A/R functionis OFF in M-2

Yes Yes - The configuration can notbe changed as the ABBmake REL 521, version 2,Dist. Relays communicationsoftware is not available.Thepresence of ABBrepresentative is required

The configuration cannot be changed as theABB make REL 521,version 2, Dist. Relayscommunication softwareis not available.Thepresence of ABBrepresentative isrequired

Required changes in settingfile of relay is carried outoffline. However forconfiguration outage ,services of siemensengineer isrequired.Requirementalready sent to TheExe.Engg 400KV RS Division,

1

Akola 400kV


Sr.No

.

Name ofS/s

identifiedfor

ProtectionAudit

S/svoltage

(kV)

Observations of protectionAudit

Deficiencies that can be Deficiencies involving

Status as on 30/11/2016 Present Status as on30/06/2017Name of Zone

Amravati

Aurangabad

A/R feature is disabled - - - YES Yes CompletedSingle ph LBB initiation notavailable.

- - - YES Yes Completed

4 220kVWaghala

220kV 132kV TAMSA &JANGAMWADI-II:- i)DR inREX-521 Backup relay forboth bays is not configure.

Yes No - M/S - ABB representativerequired to attend.

M/S - ABBrepresentative requiredto attend.

5 SataraMIDC 220kV

R-Phase element of TMDunit is faulty for 220kVBusbar Protection relay

Yes No Not attended Not attended

6 Miraj 220kV

Distance relay of 110kVVishrambag 1 line is foundremoved due to its faultypower card

Yes Yes Completed

7 Atit 110kV MOG of 110/11kV, EMCOT/F not working Yes No Completed

(T/F Replaced & attended)

8 Wathar 220

220kV Bus bar protection isout of service since 16 Mar2014 due to relay's displayproblem.

Yes Yes Completed

9 Kharepatan 220 Busbar relay found faulty Yes Yes Completed

10 Nagpur 400kVKoradi 400kV

For 400kV Bhusawal &Koradi-II ckt, REL 521 ABBmake distance schemes(Main-I & Main-II) areprovided. In REL 521 (ABBmake) distance scheme,Zone-4 i.e. Back-up to busbar feature is not available.

Yes No Requirement forwarded toCO

Requirement forwardedto CO

3 220kV OLDGCR Parli

220kVAurangabad

Karad

11 DeepnagarGCR 132 LBB scheme not in service No NA NA Yes No Jan-17 Commissioned on

21.06.2017

12 Babhleshwar 400 3 Dist relay retrofitting

balance Yes No Outageproblem No NA NA

Dist relay of 400kV Dhule-IIis commissioned onDt21.4.15. For 400kVAurangabad line relayrequired. 400kV Padgha isbalanced due to outageproblem

1) Not commissioneddue to outages issues.2)Telephoniccorrespondence wascarried with Mr. AvinashDesai, Alstom by 400kVTU/EE testing DivisionNashik forcommissioning of relaywork but he was unableto depute relay Engineeron that time.3)During meetingdtd.25.07.2017 at TCC, itis decided that the relaycommissioning will bedone live line.Accordingly call has beenraised to M/s Alstom todepute the relay

13 Pune 220kVKarkambh 220kV

No Bus bar is inservice.AREVA make Bus Barpanel commissioning work isin progress

Yes Yes Completed(13.10.2016)

14 400/220kVKharghar 400KV

50MVA, 220/33kV TF-1 TFauxiliarly protection relay(30GHI) is found to be faulty,which needs replacement.

Yes No

Completed(replaced on date13.11.2016)

Zone -2 time of 220kV Kalwaline is to be cordinated with220kV Kalwa - AKP line.

Yes Yes

Completed

200MVA, 220/100MVA ICT-1HV & LV Backup relaysettings are to be revised asper guidelines.

Yes Yes

Completed

The Auto reclose for all220kV lines are not inservice, it is suggested totake A/R in service.

Yes No 31.03.17

Relay Configuarationissue (SEL 421 softwareversion 7). M/s SELEngineer is required.

DR of all 220kV Lines & ICTsare to be set to trigger forany start/trip signals.

Yes No 31.03.17 Relay Configurationissue.

Nashik

Vashi

15 220kVBorivali 220KV

16 220kVTrombay 220kV

The differential relay RET670ABB make of 400kV ICT 2 ishaving diplay problem assuch HIM of relay is notshowing any data, it issuggested to replaced thesaid relay by spare one andthe relay for repair at M/sABB works.

Yes Yes

1) The relay is tested, andfound in order. The setting,configuration, DRdownloading, etc allactivities are carried outthrough laptop. Relay isworking properly.2) Follow up forprocurement of numericaldiff 3 wdg relay was madewith other testing divisions,but it is not available.Requirement is submitted toCorporate office.

1) The relay is tested,and found in order. Thesetting, configuration,DR downloading, etc allactivities are carried outthrough laptop. Relay isworking properly.2) Follow up forprocurement ofnumerical diff 3 wdgrelay was made withother testing divisions,but it is not available.Requirement issubmitted to Corporateoffice.

The GPS of SMS system isnot working, as such relaysare not synchronised withGPS and time stamped DR isnot available. It is suggestedto take up the issue withsupplier & bring the GPSsystem in service.

Yes No

The GPS system is of SERTELmake and supplied by ABB.It is requested to M/S ABBto take the issue to M/SSERTEL; and provideguidance and technicalsupport. Agency is notresponding.

The GPS system is ofSERTEL make andsupplied by ABB. It isrequested to M/S ABB totake the issue to M/SSERTEL; and provideguidance and technicalsupport. Agency is notresponding.

17 400/220kVPadghe

400/ 220kV

Vashi

1 2 3 4 5 6 7 8 9 10 11 12 13

Sr.No.

Name of Zone


ProtectionAudit

S/svoltage


Directional E/F setting to be adopted in Bhusawal &Nandgaon Peth Bay.

Yes Yes … …Two nos of binary output configured for

operation of main and tie triprelay.Directional E/F is enabled.

STUB Protection to be enabled in Nandgaon Peth &Bhusawal Relay.

Yes Yes … … STUB protection is enabled.

Communication failure of Aurangabad I & II ckts,Wardha I & II ckts, Bhusawal bay relays & MCU (MainBB relay) occured frequently & restored itself whichis not desirable.

Yes No Problem reffered to Chief Manager, Wardha & M/s Siemens.Problem reffered to Chief Manager,

Wardha & M/s Siemens.

The events/alarms of Main-II distance protectionrelays (ABB make-REL-670) of Wardha I & II, A'bad I& II ckts are not appearing on SCADA.

Yes No … … … … Matter is taken up with M/S PGCIL Matter is taken up with M/S PGCIL

The timer for Zone-1 tripping of Wardha I & II Cktskept 100msec.

… … … … … Completed

The Zone III & IV timer settings of Aurangabad I & II,Wardha I & II ckts kept 1000msec & 1100msecrespectively.

… … … … … Completed

Harmonic restrain feature not adopted in both H.V.& L.V. Back-Up Relay

Yes Yes … … Matter is refered to M/s SiemensHarmonic restraint feature is enabled in

backup relays of both ICTs

Importang digital signals are not included in DR ofNandgaon peth, Bhusawal, APTCL & ICT bay.

Yes Yes … …

Services of Siemens Engineer required. Requirement sent toThe Exe.Engg 400KV RS Division, Akola.vide Letter Ref No:-Addl.EE/400KV/Testing Unit/Akola/Tech/FNo.09/ No. 82DT:29/09/14 Matter is refered to M/s Siemens. Vide maildated 01.03.2016.,24.05.16 & 25.10.2016.Responce isawaited from SIEMENS

All signals are included in DR ofNandgaon and Bhusawal bay

Wide variation in LBB current detector setting ofPGCIL

… Yes … … … Completed

Matter is taken up with M/S PGCIL vide Email on dt16.01.2015.As per telephonic discussion with M/s PGCIL dtd29.11.2016,wide variation in LBB setting is because of Linereator is used in Auragabad I&II ckt and Wardha I&II iswithout Line reactor

Completed

2 Balapur 220kV

Ethernate switch of Bay room 11 is faulty since26.07.2015, the communication of the relays of132KV TBC-2 connected to this ethernate switch isfail. Hence alarm/events of these bays are notappearing on SCADA.

Yes No Procurement of Ethernate switch/repairing is required.

Procurement of Ethernate switch/repairingis required. (proposed that such of the

material may be procured bytesting/Telecom dn.

3 Aurangabad132kV LTRMIDC

132/ 33/11kV

11kV Capacitor Bank: Trip Relay not availabletherefore extendeded from OC/EF relay directly.

YES NO Completed Completed

4 Vankusawade 220 kV

TMD unit & Diode unit of ABB Make RADSS Bus-barProtection scheme is faulty, hence Bus-bar & LBBprotection schemes are non operative (Ref.DyEE/TU/STR/No.190 Dt. 17.08.2012).

Yes No Not Attended Not Attended

SCADA system is not working at all Yes Yes Completed

Peripheral Unit of 220 kV TBC for Busbar is notcommunicating with CU as communication cable iscut.

Yes Yes Not Attended Attended.

6 Karad 400kVAll 220KV lines LBB protection configured in back uprelays (ER FPRO) are not in service due to all FPROrelays were hanged.

YES YesER relay problem is attended by the agency. The relayworking is under observation & will be taken in serviceshortly.

Completed

7400 KV

KhaperkhedaS/Stn

400KVFor Koradi2 ckt M1 distance relay is faulty (ERSIFANG CSC 101)

Yes Yes A Spare distance relay available. ER engineer is required.Completed.

Replaced Master CPU 1, CPU 2 card forCSC101 relay in m/o may 17

All main protection relays for 400KVlines/ICTs/Reactors are not time synchronised withGPS

Yes No ---Needs to explore the possibility of GPS synchronisation withmanufacturer of all type of numerical relay available withthis substation

Pending

Zone setting & Resistive reach setting for distanceprotection are found to be different from therecommanded setting given by Tractebel based onRamakrishna committee recommendations(Taskforce committee guidelines). However, calculationsof present settings were discussed with auditcommittee and it was found that the settings aredone as per the load enchroachment criteria.

yes No --- --- --- The matter is referred to CO & WRPC

For CHD-2 CKT 1 & 2 the settings are adoptedas per the recommendations.

However Zone-2 settings of Parli CKT-3 andKhaperkheda CKT (being long line followed byshort line) and Zone-3 setting of Parli CKT-3

(to restrict Zone-3) are adopted as per SETCCguidelines.

GPS synchronization problem in MICOM (P444) relay. Yes No Pending Pending

SAS-2 is not in service. Yes Yes Pending Completed


Deficiencies that can becorrected without

procurement(Category-A)

Deficiencies involvingprocurement (Category-B) Status as on 30/11/2016

1

Amravati

Akola 400kV

Services of Siemens Engineer required .Requirement sent toThe Exe.Engg 400KV RS Division, Akola.vide Letter Ref No:-Addl.EE/400KV/Testing Unit/Akola/Tech/FNo.09/ No. 82DT:29/09/14 Matter is refered to M/s Siemens. Vide maildated 01.03.2016.& 24.05.16 24.05.16&25.10.2016.Responceis awaited from SIEMENS

Present Status as on 30/06/2017

Nagpur

8 400KV GCRChandrapur

S/Stn400KV

9400 KV

SwitchingS/Stn

400KV

Completed

M/s PGCIL has revised all the settings as per theRamakrushna Committee Recommendation dtd22.11.2016.Revised settins are as below:- 1.Wardha I&II CktZone I-0.1 Sec , Zone II- 0.5 Sec, Zone III-1.5 Sec and ZoneIV-0.5 Sec .2. Aurangabad I&II CktZone I-0 Sec , Zone II- 0.5 Sec, Zone III-1.5 Sec and ZoneIV-0.5 Sec

Karad5 Phaltan MIDC 220 kV

For bay no 429 End fault protection licensee in notavailable in bus bar.

Yes NoSince the licensee is to be procurred from concernedvendor & firmware upgradation required, hence the matteris taken up with BHEL and waiting for completion.

GPS synchronization problem in MICOM (P444) relay. Yes No Pending

For MICOM relay software upgradation is pending. Yes No Pending

For short lines (400KV GCR Chandrapur-1 & 2, 400KVSwitching 1 & 2) line differential protection notprovided.

Yes No

8 nos. Alstom make line differential relays are available with400 KV testing unit, Chandrapur-II, and 4 nos. ABB makerelays are available with M/s ABB. The remaining work ofOPGW & procurement of 4 nos. ABB male relays arepending with project division, Chandrapur. The matter isconstantly being taken up in every meeting.

SAS-2 is not ready. Yes Yes CompletedProblem attended by M/s ABB Engineer on dtd. 17/03/2016and SAS-2 is in service.

MFM meter is not configured in SCADA Yes No

M/s ABB & M/s Secure representative were visited to 400 KVChandrapur-II S/S on dtd. 15/03/2016, however,failed toconfigure the MFM meters in SCADA. The matter is beingtaken up with project division, Chandrapur and M/s- BHEL.

pending,the matter is already taken with higherauthority & also inform to Project division

chandrapur, EHV R.S. O&M Dn-2, Chandrapur.

11400 KV

Warora S/Stn400KV

Teed-1 relay (CSC 326 SIFANG) of 400KV PGCIL-2 isnot working. (Master card sent for repair).

Yes Yes Mastercard sent for repair to M/s ERL at Hoisur Tamilnadu

Completed.On Master card repairs by M/S ERL and relay

made healthy on dt 04.01.2017. Presently relayis in working condition.

12132 KV

Amgaon S/Stn132KV 132/33KV, 25MVA T/F-2 MFM meter is faulty. yes Yes Completed Replaced on Dt. 20.06.2016 Replaced on Dt. 20.06.2016

13132KV

UppalwadiS/Stn

132KV 48V Charger:- Annunciator is faulty Yes Yes CompletedAnnunciator Repaired in Aug-2016 & is in workingcondition.

Annunciator Repaired in Aug-2016 & is inworking condition.

14 Pune132kV

Baramati132

132KV Baramati lineABB make REX 521 backupprotection relay is faulty. 2) Aux relay of T/F-1 arefaulty faulty needs to be replace.

Yes No Completed

15220/132 kV

Boisar-II

220kV&

132kV

220kV Tarapur Siemens make Relay 7SA522 is havingAuto Reclose problem which needs to be attendedin coordination with M/s Siemens.

Yes Yes Jul-16Tried to attend with the help of Siemens representativeon Call but still it is to be resolved.

CompletedProblem rectified on 24.02.2017 duringOutage and AR is operating properly.

The BB trip relay 96T contact for LBB initiation is tobe checked for all 220kV lines & TF & if not shall bein-corporated.

Yes No Yes No Jul-16spare core needs to be identified and wiring needs to be

carriedout. Cable neededWork is in progress

The LBB OC setting is to be checked for 3OC with0.8A setting.

Yes Yes Jul-16only the old Trf and line panel is pending, for rest trf its

doneCompleted

The 220kV Vasai-Padghe line, the distanceprotection zone-2 reach to be revised to set at least120% of protectected line section.

Yes Yes Aug-16 Completed

The 100kV Vasai-Kolshet, Padghe & Railway-1 & 2,zone-2 reach is to be revised to 120% of protectedline section as per guidelines.


For 220kV PGCIL, Padghe and 100kV Koleshet,Padghe & Railway-1 & 2 lines, zone-3 reache is to berevised to 120% of total of protected line sectionplus longest line at remote end as per guidelines.


For 220kV PGCIL, Padghe and 100kV Koleshet,Padghe & Railway-1 & 2 lines, Resistive reaches areto be revised considering theRarc=6ohms/Rt=25ohms for 220kV lines andRarc=4ohms & Rt=15 ohms for 100kV linesrespectively.


For 220kV PGCIL line, reverse zone setting is to berevised to cover minimum 2kM impedance reach.


For 100kV lines, reverse zone setting is to be revisedto cover minimum 2kM impedance reach. The timedelay is to be set to 250msec as bus-bar is not inservice.


For 220kV lines, TNC switch contact is to be wired upfor SOTF input as SCADA is not in service.


The 100MVA 220/100kV ICT-1 &2, HV side B/U relaydirection is kept NON-directional which is to be keptDirectional.Also the B/U setting is to be revised byconsidering ROT 600msec.


The 100MVA ICT-1&2 LV B/U relay R1 (Non-directional) & R2 (directional) setting is to be revisedby considering ROT 500msec & 400msecrespectively. Also H/S OC feature is to be activitedfor both ICTs.


At present 220kV lines/ICT and 100kV lines/TFnumerical relays DR is trigger with `trip signal' whichneeds to be changed to `any start'.


For 220kV lines & ICTs, LBB initiation through Bus -bar is to be confirmed.


The 200MVA, 220/100kV ICT-1 & 2 HV/LV B/U relaysetting are to be revised considering the ROT500msec. The OC HS feature is to be made ON.


The 50MVA, 220/22kV & 100/22kV TF-1 & 2, HV/LVB/U relay setting are to be revised considering theROT 500msec & 350msec respectively. The OC HSfeature is to be made ON.


For 220kV lines, the BU relay setting is to be revisedby considering the ROT 500msec.


Nagpur

10400 KV

Chandrapur-2S/Stn

400KV

Pending, the matter is already taken withhigher authority & also inform to Projectdivision chandrapur, EHV R.S. O&M Dn-2,

Chandrapur.

Vashi

16 220kV Nerul 220kV

17220/100kV

Vasai

220kV&

100kV

18 220kV Kolshet 220kV

The ON-LINE direction of OC & EF relay for bothlines & ICT/TF are to checked & confirmed.


In ER make panels, the CB contact is used in LBBinitiation circuit, which needs to be bypassed.


For 220kV Padghe & Kolshet line zone-I setting is tobe revised to 80% instead of 85%.


For 220kV padghe line zone-II is set to 120% ofprotected line.


For 220kV kolshet line Zone -II is set to 120%considering 220kV Bhaveghar s/s newlycommisssioned.


For 220kV Padghe & kolshet line Zone -III is set to120% of total of (Protected line + Longest line)


Resistive reaches for all 220kV Padghe & Kolshetines are tobe revised by considering tower footingresistance & arcing resistance 25ohms & 6ohmsrespectively.


Load enchrohment setting to be verified for all220kV line after modifing the relays setting as above.


Reverse zone (Z-4) reaches for 220kV lines shall beset to cover at least 2km line length & time delay tobe set to 700msec.


SOTF reache for 220kV Padghe & Kolshet line is tobe accelrated upto zone3 impedance.

Yes Yes Aug-16Completed

(REL 670 setting SOTF setting contains current andvoltage settings only)

Completed

For 220kV Padghe & Kolshet lines, zero sequencevoltage setting for VT fuse supervision shall bechanged to 30% instead of 10%.


For 50MVA Tf-2, 3, 4 and 100MVA TF-1, the LV siderelays are set directional which needs to be changedto Non-directional.


The 220kV lines & all TFs Numerical relays DR to beconfigured for any start.


For all TFs Numerical relays DR BI are to beconfigured for various signals such as Master tripoptd., Buchhloz/PRV trip, B/U optd and REF optd.


In LBB scheme, CB contacts needs to be bypassedfor all 220kV Lines & TFs.


20 220kV Mulund 220kVAll 220kV lines Auto reclose contact shall beconfigure for LBB initiation.

Yes Yes Jul-16 Completed

For 220kV Borivali line zone-2 reach is to be set to120% of protected line. However at Borivali end,220kV BO-BO line zone-2 time is to becoorddinated.


For 220kV Borivali & Mulund line zone-3 reach is tobe set to 120% of total of (protected line + Longestline)


Resistive reaches for all 220kV Borivali & Mulundlines are to set by considering tower footingresistance & arcing resistance 25ohms & 6ohmsrespectively.


Reverse zone (Z-4) reaches for 220kV lines shall beset to cover at least 2km line length & time delay tobe set to 700msec.


For 220kV Borivali & Mulund line, A/R is not takeninto service due to combined cable & conductorconfiguration, it is suggested to take the A/R inservice.


(AR can not be implemented as function not available inDPR)

For 220kV Mulund line, zone-1 setting is to berevised to *80% of protected line consideringcombined line configuration (cable + conductor) ofline.


The TF back up protection relay is having harmonicrestraints feature is kept OFF, the same is to bemade ON

Yes YesThe setting doesn’t highlight for edit in Digsi. Coordination

it M/s SiemensCompleted

It is observed that the Bus-bar contact is not wiredup for LBB initiation as such it is suggested to thatthe BB contact shall be wired up for Master trip relay,so that same can be used for LBB initiation.

Yes Yes Jul-16 Outage Required Completed

It is observed that the BB contacts are wired up forTC-1 circuitry. It is suggested to that the BB contactsare also wired up for TC-2 circuitry.

Yes Yes Jul-16 Outage Required Completed

The 220kV Wada -Padghe line zone-2 & 3 settingare to be revised as per guidelines. The zone-2 timeco-ordination between wada & Padghe is to becarried out & zone-2 tine delay at padghe is set to300msec.


The 220kV Wada -Bhaveghar line zone-2 & 3 settingare to be revised as per guidelines.


The 220kV Wada-Padghe & bhaveghar line PSBdeblock time is to be set to 2sec instead of 3 sec.


The 220kV Wada-Padghe line AR is kept off due todefective/faulty B-ph single phase trip relay, whichneeds to be replaced immediately.


The 220kV Wada-Padghe & Bhaveghar line BU relaysetting are to be revised by considering the ROT500msec.


The BU relay setting of 100MVA, 220/22-22kV TF-1 &3 and 50MVA, 220/22kV TF-2 & 4 are to be revisedas per guidelines. The OC HS feature of all TFs are tobe activated.


except OC HS feature for Tf no. 3 & 4 wil be completedby Dec'16.

Vashi

18 220kV Kolshet 220kV

19 220kV Kamba 220kV

21220kV GISBhandup

220kV

22220kV

Sonkhar220kV

23 220kV Wada 220kV

1 2 3 4 5 6 7 8 9 10 11

Sr.No.

Name of ZoneName of S/sidentified for

Protection Audit

S/s voltage(kV)

Observations of protection Audit

132kVWarwatBakal

132

Harmonic restraint feature is not available in ERmake, Argus-2, DCD 914 C , H.V. Backup relays ofTransformers. same can be achieved by replacingthese relays by suitable ones.

Yes No Relay required

132 Kv Motala 132Harmonic restarint feature not available in HV B/Urelay of TF 1&2.Same can be achieved by replacingthese relays by suitable relays.

Yes No Relay required

132kV Gangapur 132 Zone -4 (Reverse Zone ) time setting of distance relaywas 900msec .

Yes Yes …. ….

132kV Vaijapur 132 Zone -4 (Reverse Zone ) time setting of distance relaywas 900msec .

Yes Yes …. ….

132kV Pishor 132 132kV Sawangi PLCC panel to be taken in service forcarrier protection.

Yes. No Protection coupler not in service

132kV Soygaon 132For 132kV Pahur line Distance relay P442 shows allphases indications on any fault other than R ph. No. No

Needs to contact SCADA Engineers

1) Dist Relay for Incomming Jalna Ckt II is faulty. Sothe Dist Relay ABB REL670 required. Yes No --

Dist Relay awaited.

2) HV Bup Relay ABB Make REC 670 of 25MVA132/33kV TF I is faulty. Yes No --

Temporarily Simple Schnider makeNumerical relay placed but the same is notSCADA compatible also not having DR

1. Correct Protected Line Lengths are not available.Yes Yes

Line Lengths obtained from Lines sub-divn(Taurus) & zone reaches recalculated asper new line length.2) PLCC Coupler trials for Line tele-protection

Yes YesPLCC Coupler trials for Line tele-protectionwill be carried out in coordination withPLCC team

3) Backup ROT is given as 400ms considering sourcebus fault level Yes Yes

Backup ROT will be given as 400msconsidering fault contribution at remotebus due to line

4) Auto Reclosure out of service for all 132KV lines.Yes, No

AR will be taken in service after completionof PLCC Coupler trials for Line tele-protection.

5) SOTF selected for all zones. Yes Yes SOTF selected for zone 1 & 2 only.6) REF relay & protection thereof is out of service dueto non availability of 'STABILIZING RESISTOR' in newCPRP (132/33KV TF I)

Yes, NoSTABILIZING RESISTOR is required to takethe REF protection in service.

7) REF relay & protection thereof is out of service dueto non availability of 'STABILIZING RESISTOR' in newCPRP (132/33KV TF II)

Yes, NoSTABILIZING RESISTOR is required to takethe REF protection in service.

1) Protected Line Lengths.Yes Yes

Line Lengths obtained from Lines sub-divn& zone reaches recalculated as per newline length.2) SOTF selected for all zones. Yes Yes SOTF selected for zone1 & 2 only.

3) PSB blocking zones selected as Z1,Z2,Z3,Z4. Yes Yes PSB blocking zones are now selected as Z2,Z3 & Z4.

4) Resistive reaches for ground and phase faultelements. Yes Yes

Resistive reach values are corrected as percalculations.

5) Harmonic restraint values of Diff relays.Yes Yes

2nd and 5th Harmonic restraint values arechanged from 20% to 15% and 25%respectively.6) 2nd harmonics restriant was disabled in Line Diff

relay of 132KV VSSK Line.Yes Yes 2nd Harmonics restraint enabled.

7) Auto-recloser is not in service of 132KV HRANGUL& UJANI Lines.

Yes, No Autorecloser scheme testing is pending.


Deficiencies that can be corrected without procurement(Category-A)

Deficiencies involving procurement (Category-B)

Aurangabad

1 Amravati

132kV Rajur 132

132KV Kallamb 132/33 KV

132 KV Niwali 132/33 KV

2

8) Back up settings for TBC1, TBC2 & BusSectionaliser. Yes Yes

Back up settings for TBC1, TBC2 & BusSectionaliser recalculated as per therecomendations and changed accordingly

For short lines (400KV GCR Chandrapur-1 & 2, 400KVSwitching 1 & 2) line differential protection notprovided.

Yes YesLine Lengths obtained from Lines sub-divn& zone reaches recalculated as per newline length.

SAS-2 is not ready. Yes YesBRC function enabled and a spare outputcontact assigned for annunciation.

MFM meter is not configured in SCADA Yes Yes SOTF selected for zone 1 & 2 only.Teed-1 relay (CSC 326 SIFANG) of 400KV PGCIL-2 isnot working. (Master card sent for repair).

Yes Yes PSB blocking zones are now selected as Z2& Z3.

132 KV OLD GCRParali

132 Zone 2 time is 350ms for all three line feeders itshould be 400ms

Yes No Awaiting for instructions if its to be done.

220KV ICL 220 Auto Reclose feature kept off for ICL- Parli & ICL-HRL-II Line

Yes No AR to be tested for ICL HR-II line.

1) Protected Line Lengths.Yes Yes

Line Lengths obtained from Lines sub-divn(Taurus) & zone reaches recalculated asper new line length.

2) Backup ROT is given as 400ms considering sourcebus fault level Yes Yes

Backup ROT will be given as 400msconsidering fault contribution at remotebus due to line

3) Auto Reclosure out of service for all 132KV lines.Yes No

AR will be taken in service after completionof PLCC Coupler trials for Line tele-protection.

4) SOTF selected for all zones. Yes Yes SOTF selected for zone 1 & 2 only.5) PSB protection zone correction Yes Yes PSB selected for zone 1 trip and zone 2,

3&4 blocked.

132 KVHimayatnagar

132

Distance Relay Make ER -THR is ElectromechanicleRelay & its Power supply module faulty for 132kVUmerkhed line. Yes No

Requirement of numerical Distanceprotection submitted for retrofitting. Note:-After commissioning of Bhokar -Himyatnager Ckt Distance & B/U numericalRelay Require.

132 KV Mukhed 132Auto reclosure was not in ckt in Distance Relay MakeSiemens 7SA611 for 132kV kundalwadi line. Yes Yes

132 KV Hingoli 132132 KV Kinwat 132

132 KV Purna 132

Distance protection relay is not in Circuit of 132kVParbhani line.

Yes No

Previously substation was a radialsubstation & unwanted tripping happen onrelay therefore to avoid unwantedtrippings Distance relay was keep out ofcircuit.

132 KV Sonpeth 132132kV Wai 132

132kV Shirwal 132132kV Dahiwadi 132132 kV Aundh 132110 kV Rethare 110

220 KV Kadegaon 220

Zone 1 should be unblocked from PSB for (1) 110 KVGokulshirgaon-Mudshingi line (2) 110 KVgokulsirgaon Shahu kagal line

YES No

Highset delays for TF LV B/U relay should have to bekept in between 100 msec to 200 msec for O/C & E/F

YES No

Cross blocking function should be enabled for TFdifferential relay

YES No

110 KV Kurundwad 110

Aurangabad

132 KV Niwali 132/33 KV

220KV Patoda 220

2

220 KV Peth 220

110 KVGokulshirgaon

110

132KV Pangri 132

NILNIL

NIL

Karad3 NIL

NILNILNILNILNIL

NIL

Zone 3 & 4 Time setting of Distance relay's needs tobe reviesed as per guidelines for all 132 KV Lines.

Yes Yes

110 KVChambukadi

110

Zone 1 should be unblocked from PSB for 1. 110 KVKale-Kumbhi line 2. 110 KV Kale- DYP SSK line

YES No

Cross blocking function should be enabled for TFdifferential relay

YES No

132 KV Talebzar 132

110 KV Arawali 110

132 KV Kudal 132220 KV Oni 220

110 KV Ichalkaranji 220

110 KVRadhanagari

110

110 KV BapatCamp

110

220 KV Wathar 220

400 KV Koradi 400For Indiabulls & Bhusawal line:- Distance protectionscheme (M1 & M2, REL 521)- Zone 4 facility is notavailable.

Yes No Yes No

1) For Koradi2 ckt M1 distance relay is faulty (ERSIFANG CSC 101)

Yes Yes

2) Teed 1 B2 CSC326 relay is faulty Yes Yes3) 220KV Busbar relay (CSC150) :- Set group erroralarm persists.

Yes Yes

400 KV Koradi-2 400FOTC for OTI/WTI temperature indicator for ICT-1 &ICT2 is not yet commissioned.

Yes No

400 KV GCRChandrapur

400

400 KVChandrapur-2

400

400 KV SwitchingChandrapur

400

400 KV Warora 400

Teed-1 relay (CSC 326 SIFANG) of 400KV PGCIL-2 isnot working. (Master card sent for repair).Presently Teed-1 protection for said bay is not inservice.

YES YES

220KV Butibori 3 220 220KV MIDCChandrapur

220

132KV Katol 132 132/33KV T/F-1 & 2 AREVA P632 differential relaydisplay problem Yes No

Matter Taken with M/s GE

132KV Mouda 132 132KV Sakoli 132

132KV Lakhandur 132 132KV Bramhpuri 132 132KV Sindewahi 132

132KV Seloo 132 132KV Pulgaon 132

132KV Arvi 132 132KV Mansar 132

1) It is recommended to provide overexcitationprotection for ICT-III. Yes Yes

Provided in all differential relays of ICT1,2,3&4

2) Breaker failure protection should be provided with2 steps. First stage is the re-trip of the CB and secondstage is the trip of all the associated CB’s. Thismitigates unwanted operation of breaker failureprotection during maintenance and fault tracing.

Yes Yes

As per MSETCL policy CB Fail/LBB protn.issingle stage i.e. to trip all associated CBsafter 200 msec. if own CB fails to trip.

3) It is advised to record the status signals of CBstatus, Main-I & II trip status, Overvoltage trip status,Permissive and direct carrier receive status, Linereactor trip status, which can ease the postdisturbance analysis.

Yes Yes

some of the status such as CBstatus,Permissive and direct carrier receivestatus, Overvoltage trip status, are alreadyconfigured in Distance relay.

110 KV Kale 110

NIL

NIL

NIL

NIL

Karad3

NIL

NIL

NIL

NILNIL

5

NILNIL

4 Nagpur

400 KVBabhaleshwar

400

NilNILNILNilNILNIL

NIL

NIL

Nil

NIL

NIL

NIL

400 KVKhaperkheda

400

Nashik

4) It is observed that Main 1&2 relays of ABB makeare used for 400kV Bhusawal line. Hence it isrecommended to use the different make relays foreither Main 1 or Main 2 protections in order toenhance reliability.

Yes Yes

The Main-1 & Main-2 protection areprovided since commissioning as perapproved scheme.

5) Directional backup earth fault relay is to beprovided for all the 400kV feeders. In the proposedsettings, the directional earth fault relay settings for400kV lines will act as backup for 400kV line distanceprotection. The required time of operation is kept asback up to Zone 3 timing for the fault currentcontributed by the line for the remote end fault.

Yes No

Takenup in hand. Completed for 400 KVDHL1&2 line

6) From existing line protection (distance) settings, itis observed that the Zone reach and resistive reachsettings are found to be inadequate. Hence, the linesettings (distance) have been revised and detailed inAnnexure-4 of the report.

Yes No

There is no mal operation/ incorrect faultdistance shown by relays.However settingsreviewed as per annuxure 4

7) It is observed that all zones are blocked in PSB of400kV Dhule-I&II Main 2, 400kV Padghe-I Main-I.Hence it is recommended to unblock the zone 1 andblock the remaining zones for power swingoperation.

Yes Yes

Zone-1 is unblock in all relay & other zoneare blocked.

8) It is observed that unblocking time delay of powerswing is not as per the guidelines in case of 400kVDhule-I&II Main 2, 400kV Padghe-I Main-I, 220kVBhenda, and 220kV Waluj. Hence it is recommendedto set unblocking time delay (2 seconds) of powerswing as per the CBIP guidelines.

Yes Yes

Exept zone-I ,other zone are permanetlyblock as per ramkrishna committeeguidelines

9) It is recommended to provide the directionalovercurrent and earth fault relays on both sides of400/220kV ICTs.

Yes Yes

10) It is recommended to replace the static relayswith the numerical relays for the following feeders: 400kV Aurangabad Main 2 relay 400kV Padghe-II Main 2 relay ICT-I&II REF relay Reactor-I&II both Differential and REF relays

YesNo

In Process.

11) It is recommended to enable the over voltagefeature in numerical distance relay it self.

Yes YesEnabled in numerical relay .

12) Backup impedance protection to be provided forreactor-I.

Yes No

1) It is observed that all zones are blocked in PSB of400kV Khandwa-I&II Main 2, 400kV Songir-I&II Main!&2, 220kV Chalisgaon, and 220kV Dondaicha-Old.Hence it is recommended to unblock the zone 1 andblock the remaining zones for power swingoperation.

Yes Yes

2) It is observed that unblocking time delay of powerswing is not as per the guidelines in case of 220kVDondaicha New, 220kV Amalner and 220kVMalegaon. Hence it is recommended to setunblocking time delay (2 seconds) of power swing asper the CBIP guidelines

Yes Yes

3) It is observed that backup impedance setting ofKhandwa line reactor 2 and bus reactor wasinappropriate. Hence new settings are proposed asper standard guidelines

Yes No

Property of PGCIL , prot. Settings are doneby PGCIL .

220 kV Pegasus 220220 KV Chakan -II 220

220 kVVolkaswagan

220

220 KV MVML 220220 KV

Bridgestone220

5

400 KVBabhaleshwar

400

NilNIL

NIL

NIL

Nil

400KV Dhule 400

Nashik

Pune6

220 KV Shirsufal 220220 KV

Walchandnagar220

220 kV Kondhwa 220220 KV Serum 220

220 KV Fiat 220132 KV

Narayangaon132

132 kV Chakan 132

132REF relay ER 4B3 for Indotech TF is faulty .Needes tobe replaced.

Yes No

132132/22 KV, 25 MVA, Indotech TF Buccholz relaysometimes operates on heavy feeder fault, may bereplaced.

Yes No

132 KV Sanaswadi 132

220kV VithalraoShinde SSK

132

132kV Birla Super 132132kV Zuari

Cement132

132kV UthopianSugar

132

132kV Ultratech 132132kV Parewadi 132

132kV Puranwade 132132kV Puluj 132

132kV Velapur 132132kV Karajgi 132

132kV Siddhanath 132132kV

Shankarnagar132

132kV Indapur 132132kV Daund 132132kV Janai 132

132kV Bawada 132132kV Daund TSS 132132kV Yawat TSS 132

132kVSomeshwarnagar

132

132kV Alegaon 132

1) Zone 2 setting of 220 kV HOC line is to be revisedto 120% of protected line, as B/U protection iscoordinated at HOC end; as per guidelines.

Yes Yes

2) Zone 4 setting for 220kV HOC, Apta 2, 3 & 4 linesare to be revised as per guidelines (2 kM)

Yes Yes

3) SOTF for Uran-HOC line: tSOTF to be revised from0.3 to 1 second.

Yes Yes

4) PSB for Uran-HOC line: Unblock time delay to berevised from 3 to 2 second.

Yes Yes

5) B/U relay settings need to be revised for all lineB/U protections, as per guidelines. The back up relaysettings shall be recalculated & revised with 2012fault level data.

Yes Yes

6) Directions of back up relay for all lines are to beverified onload.

Yes NoDirection checked for Apta IV line.Remaining lines will be completed shortly.

132 kV Kuruli

NIL

NIL

NIL

NIL

NIL

NilNILNIL

NIL

NIL

Nil

NIL

NIL

NIL

NILNIL

NILNIL

NIL

NIL

NILNil

NIL

NIL

NILNILNILNIL

Pune6

Vashi7

220kV Uran 220 Kv

7) Zone 2 setting of 220 kV Apta 2,3,4 lines: is to berevised to 120% of protected line,For Uran-Apta 2,3,4 lines: Z2 delay shall be 400mS atUran end & for Apta-Bombay Dying line: Z2 delay shall be300mS at Apta end;for Apta-HOC line: Z2 delay shall be 250mS at Aptaend

Yes Yes

8) DR of all Lines & T/Fs are to be set to trigger forany start/trip signals.

Yes Yes

9) Zone 2 setting of 220 kV Kharaghar 1&2 lines: isto be revised to 120% of protected line

Yes Yes

10) For 220 kV Kharaghar 1&2 lines, 220 kV JNPT line:VTS FF: I2 & I0 Inhibit setting is to be revised from 50mA to 100 mA.

Yes Yes

11) 220 kV JNPT: Zone 2 and zone 3 setting need tobe revised as per guidelines.

Yes Yes

12) DR of all 220kV Apta 2, 3, 4 Lines: SOTF,FF,LBBOPTD,BB OPTD, BRC, PDR, Any start to beconfigured.

Yes Yes

13) DR of 220kV Khaargahr 1&2 Lines:Z2 trip, Z3 trip,reverse zone trip, Any start to be configured.

Yes Yes

14) For DR triggering the BI for TF are to beconfigured for transformer aux. protection.

Yes Yes

15) T/F HV HS PS shall be revised to 4 with DT 350mS

Yes Yes

1) Zone 1, 2 & 3 setting for 220kV Mulund, Kharghar& Sonkhar lines are to be revised as per guidelineswith considering line lengths finalised by TCC.

Yes Yes

2) For Trombay-Mulund line: Z2 delay shall be 400mSat Trombay end & for Mulund-Bhandup line: Z2 delay shall be 300mSat Mulund end.

Yes Yes

3) Reverse Zone reach for all lines shall be kept 2 km. Yes Yes

4) SOTF for 220kV Mulund, Kharghar, Kalwa &Sonkhar lines are to be reconfigured with "Manualclose" BI.

Yes Yes

5) The back up relay for all lines, the data used forcalculation is not matching with 2008 or 2012 faultlevel calculations. The back up relay settings shall berecalculated & revised with 2012 fault level data.

Yes Yes

6) Directions of back up relay for all lines are to beverified onload.

Yes Yes

7) For Trombay-Sonkhar line: Z2 delay shall be400mS at Trombay end & for Sonkhar-Nerul line: Z2delay shall be 300mS at Sonkhar end.

Yes Yes

8) For 220 kV Trombay-Kalwa Line: Z1 shall protect100% of protected line; Z2 shall protect 120% ofprotected line; Z3 shall protect 200% of protectedline & for all Z1, Z2 & Z3 there shall be no delay i.e. 0mS.

Yes YesTrombay line is through now & accordinglysetting done.

9) HV B/U of 200MVA 220/100kV ICT 1 & 2 are nondirectional, which needs to be confirmed withreasons on record.

Yes Yes

Vashi7

220kV Uran 220 Kv

220kV Trombay 220kV

10) ICT HV O/C PS shall be revised from 75 to 65%with ROT: 600 mS;ICT LV O/C PS shall be revised from 80 to 72% withROT: 400 mS;ICT HV HS PS shall be revised to 2.6 with DT 100 mSfor bushing fault.(ICT B/U protection relays are non directional as it isradial feed.

Yes Yes

1)The zone-2 timing of 220KV Kalwa line needs to becoordinate with 220kV Kalwa AKP line (Set as 250 ms)at 220kV Kalwa end.

Yes Yes

2) For 220kV Kalwa Borivali line Group 1 setting onlykept Active & Group 2,3,4 for Z1,Z2,Z3,Z4 shouldmade OFF.

Yes Yes

3) for 220kV Kalwa & Tarapur line DUDI function inVT Fuse failure found ON. So, need to made OFF

Yes Yes

4) For 220kV Kalwa line AR t1 3ph should kept 1sec. Yes Yes

5) 220kV Kalwa line, in PLCC communicationIcord=0.015 sec kept. So, need change asIcord=0.050 Sec

Yes Yes

6) 220kV Tarapur & 220kV Ghodbunder (RIL) Linezone 3 parameters need to revised by considering120% ( Prot. Line Length + adj. Longest Line Length)

Yes Yes

7) For 220kV Ghodbunder (RIL) line Distance relay7SA52 in earth fault function criteria for earth faultshould kept 3Io> AND 3Uo> instead of 3Io> OR3Uo>. Also 3Io thresold for neutral = 0.15A & 3Uofor neutral=15V setting should be kept.

Yes Yes

8) For 220kV Ghodbunder (RIL) line Differential relay I-DIFF>Pickup value & Switch on Condition set to 2.5 Ainstead of 0.3 A . I-DIFF>>Pickup value & underSwitch on Condition set to 2.5 A instead of 0.3 A .

Yes No To be co-ordinated with M/s Reliance

9) For 220kV Ghodbunder (RIL) line Differential relayVT failture time delay should kept 5 Sec.

Yes Yes

10) For 220kV Ghodbunder (RIL) line Main II linedifferntial relay Alstom P544, Zone 3 setting shouldbe revised and also load enchrochemnt shuoldconfirm.


11) For 220kV Ghodbunder (RIL) line Main II linedifferntial relay Alstom P544, Zone 2 setting shold berevised as (100% Protected line + 50% adj. shortestline ).


12) For 220kV Ghodbunder (RIL) line Main II linedifferntial relay Alstom P544, For zone1 power swingfunction should be kept OFF.


13) For 220kV Ghodbunder (RIL) line Main II linedifferntial relay Alstom P544, Power swing blockingtimimng should be kept 2 Sec.


14) For 220kV Ghodbunder (RIL) line Main II linedifferntial relay Alstom P544, in Group 1 SupervisionVTS status found kept as indication same kept asblocked.

Yes Yes

15) 220kV Kalwa, 220kV Bhandup GIS, 220kVGhodbunder line BU setting should be reviesd.

Yes Yes

Vashi7

220kV Trombay 220kV

220kV BORIVALI 220KV

16) O/C Highset for ICT, HV relay should be taken in service with PS 4.5 timeswith delay 100ms.LV relay should be taken in service with PS 2.5 timeswith delay 100ms.

Yes No GE relay communication problem.

1) 220 kV Kandalgaon Koyana (Pophali) line Z3 reachis to be revised. (Longest line is Nerali)

Yes Yes

2) Auto Reclose dead time is 0.8 S for 220 kV Mahad,ONGC, PGPL, Bhira, Dasturi: need to be revised. PDRmax time setting is 1 S: need replacement.

Yes No New relay requirement submitted to O&M

3) 220 kV Kandalgaon Bhira line: Z2 time delay is 350mS - need to be revised as per guidelines. B/U E/FP/S is 0.2 - need to be revised as per guidelines.

Yes Yes

4) 220 kV Kandalgaon Pirangut line Z2 reach is to berevised.

Yes Yes

5) 220 kV Kandalgaon Posco line Z1 reach is 90%; tobe revised.

Yes Yes

6) 220 kV Kandalgaon Posco line Z3 reach is neededto be revised as per guidelines.

Yes Yes

7) 220 kV Kandalgaon Posco line rev zone time delayis 300 mS; needed to be revised to 700 mS; as perguidelines.

Yes Yes

8) 220 kV Kandalgaon Posco line Z3 reach needed tobe increased; as per guidelines.

Yes Yes

9) 220 kV Kandalgaon Posco line AR Dead time is0.8S; needed to be increased; as per guidelines.

Yes Yes

10) 220 kV Kandalgaon Posco line VT fuse failurefunction is to be enabled; as per guidelines.

Yes Yes

11) 220 kV Kandalgaon Posco line SOTF function is tobe enabled; as per guidelines.

Yes Yes

12) 220 kV Kandalgaon Mahad line Z1,Z2,Z3 reachesare needed to be revised as per guidelines.

Yes Yes

13) 220 kV Kandalgaon Mahad line VT fuse failurefunction is to be confirmed; as per guidelines.

Yes Yes

14) 100 kV Mhasala: PSB Z1 blocking shall be done. Yes Yes

15) 100 kV Mhasala: PSB unblocking delay 10S is tobe revised to 2S.

Yes Yes

16) 100 kV Mhasala: Z1,Z2,Z3 reached are to berevised.

Yes Yes

17) 100 kV Mhasala: line length is to be revised from40.5 km to 37 km, as per TCC guidelines.

Yes Yes

18) 100 kV Mhasala: Rev zone time delay is 1S; is tobe revised; as per guidelines.

Yes Yes

19) 100 kV Roha1: Rev zone time delay is 1S; is to berevised; as per guidelines.

Yes Yes

20) 100 kV Roha1: PSB time delay is 1S; is to berevised to 2S; as per guidelines.

Yes Yes

21) 100 kV Roha1: PSB Z1 blocking shall be done. Yes Yes

22) 100 kV Roha1: line length is to be revised from 21km to 24 km, as per TCC guidelines. Z1,Z2,Z3 reachedare to be revised.

Yes Yes

23) 100 kV Roha2: Rev zone time delay is 0.3S; is tobe revised to 0.4S (=Z2t; as no BB); as per guidelines.

Yes Yes

Vashi7

220 kV Kandalgaon 220kV

220kV BORIVALI 220KV

24) 100 kV Roha2: Rev zone shall be enabled, settingsshall be carried out; as per guidelines.

Yes Yes

25) for three number of 220 kV Bus Sections, B/Urelay settings are to be recalculated; as perguidelines.

Yes Yes

26) All 220 kV and 100 kV Lines: B/U relay settingsare to be recalculated; as per guidelines.

Yes Yes

27) ICT 1&2: cooling control is manual; to be doneauto.

Yes Yes

28) DR: for lines, include channels for carrier aidedtrip, PDR, BB optd.

Yes Yes

29) For both 220/100 kV ICTs: 100 kV side B/Uprotection shall be only directional.

Yes Yes

30) For both 220/100 kV ICTs: enable high set in both220 kV & 100 kV side B/U protection; settings shallbe carried out; as per guidelines.

Yes Yes

1)100kV Bhiwandi 1 & 2 line are parallel ckt. Lin. So,Zone 2 setting should be kept as 150% of Protectedline length.

Yes Yes

2)100kV Bhiwandi 1 & 2 line length should kept asSETCC sheet data.

Yes Yes

3)100kV Vasai, Shahapur 1 & 2, Kharbao line Zone 4should kept ON & its time 700ms.

Yes Yes

4)100kV Vasai line Zone 2 setting should be kept as120% of protected line. Also, Co-ordinate setting with100kV Vasai SS for line Vasai 1 & 2.

Yes Yes

5)100kV Shahpur 1 & 2 line are parallel ckt. Lin. So,Zone 2 setting should be kept as 150% of Protectedline length. Also at Sahapur SS, 100kV Sahapur -Bhatsa line Zone 2 setting should be kept as 300ms.

Yes Yes

6)100kV New Panjrapur line; Zone 2 setting revisedas 120% of protected line length.

Yes Yes

7)For all Line & TF'S panel, LBB initiation throughexternal back up relay along with LBB scheme to bechecked & corrected.

Yes Yes

1)For ICT No.2 required to Separate DC source withtwo separate Master Trip Relay Main Protection, Backup Protection , Auxillary Protection.

YES Yes

2)DR Configuration for ICT 1 & 2 should be check &done as per protection audit guideline.

YES No

(1)In ICT 1 Duo Bias RElay Contact assignfor DR configuration but wiring work inprogress for Backup protection operated,Busbar protection trip, PDR operated.(2) In ICT 2 DUO Bias relay no sparecontact available in Differential relay, needsreplacement.

3)In DR Configuration for Line CB status & for TFNo.1 Auxillary protection should be incorporate.

YES No220kV Kharghar_MSL-PGPL line completed,but remaining feeder Contact assign butwiring work is in progress

4)For 400kV Kalwa & 400kV Padghe line parametersare changed as per Consider other SS end. 400kVPadghe-Kalwa line Length consider 51.5 KM.

YES YES

5)400kV Kalwa & 400kV Padghe line Reverse Zonereach setting be kept as 2kM .

YES YES

Vashi7

220 kV Kandalgaon 220kV

100KV PADGHE 100kV

400kV Kharghar 400kV

6)400kV Kalwa & 400kV Padghe line SOTF Settingtime should kept 10Sec in Areva P442 relay.

YES YES

7)400kV Kalwa line Main II distance relay Siemens7SA513 FAULT IN EARTH NETWORK, dispalcementvoltage for earth Ve>20V found keep same as 15V,Earth fault detection instead of with Ve>OR Ie> keptas Ve> AND Ie>.

YES YES

8)220kV Uran 1 & 2, as double ckt. Line Zone 2Setting should be kept as 150% Protected Line.

YES YES

9)At 220kV Uran SS, For 220kV JNPT & ONGC lineZone 2 time should be kept as 300ms.

YES Yes

10)220kV Kharghar -Kalwa 1 line Z1 = Reaches it is120% of Protected line & time kept as 450 ms., Z3=120% of Protected Line plus Adjecent Longest line &time kept as 700 ms.

YES YES

11)For 400kV & 220kV Lines Siemens Relays ;Address 2006 - Power swing trip Keep NO instead ofYES.

YES YES

12)220kV TSS line conductor parameters & linelength Should be consider as Actual.

YES YES

13)220kV PGPL line length Should be consider asActual.

YES YES

14)220kV Nerul line Zone 3 setting need to berevised as per guidelines

YES YES

15)220kV PGPL line Back up Setting for E/F TMS keptfor ROT 500ms.

YES YES

16)ICT 1,2 & 3 HV & LV Backup Setting should berevised as protection Audit Guideline.

YES YES

1) For 220 kV HOC line, only back up protection is inservice. Line diff relay (HORN-4) is very old and notworking; same shall be replaced.

YES No Yes NOTime being HORN 4 relay will be replacedshortly.

2) Z2 reach of 220 kV Apta-Uran 2,3,4 lines (Aptaend) shall be increased as per guidelines.For overlapping Z2; time coordination shall be carriedout between Apta end & Uran end.

Yes Yes

3) Z2 reach of 100 kV Apta-Khopoli line (Apta end)shall be increased as per guidelines.For Apta-Khopoli line: Z2 delay shall be 400mS atApta end & for Khopoli-ISI line: Z2 delay shall be 300mS atkHOPOLI end.

Yes Yes

4) Z2 reach of 100 kV Apta-Reliance line (Apta end)shall be increased as per guidelines; with Z2 timecoordination if necessary.

Yes Yes

5) For 100 kV lines, AR is in service for Jite, Musco1 &Musco2 lines. Possibility of AR taking into service forremaining lines, as per circular, shall be explored.

Yes Yes

(1) 100kV Reliance line length is 4.2kmhence not taken into service. (2) 100kVKhopoli & Bhokarpada relay is ABB REL511. M/s ABB is not extending technicalsupport hence not taken into service.(3)100kV Patalganga length is 4.5km, hencenot taken into service.

6) For 220 / 100 kV ICT 2 & 4: Fan control is manual,it was observed that, fans were ON though theloading as well as WTI temp were very less. Fancontrol & Pump control shall be made on Automode.

Yes

Yes

Vashi7

220kV Apta 220 kV

400kV Kharghar 400kV

7) DR of all Lines & T/Fs are to be set to trigger forany start/trip signals.

Yes Yes

1) 400 kV Padgha 1&2 Lines: Z3 reach should berevised as per 1.2x(PL+LL)

Yes Yes

2) 400 kV Padgha 1&2 Lines: Z3 time delay should beto 0.6 to acheve coordination with Padgha adjascentbus.

Yes Yes

3) 400 kV Kharghar Line: Z2 & Z3 reaches should berevised as per 92 km length of 400 kV Talegaon line(SL&LL).

Yes Yes

4) 400 kV Kharghar Line: Z3 time delay should be to0.6 to acheve coordination with Kharghar adjascentbus.

Yes Yes

5) 400 kV Kharghar Line: For 7SA513 relays, "AR blockon manual close" setting shall be revised to 5seconds.This setting shall be kept uniform for all 400 & 220kV Lines.

Yes Yes

6) 400 kV Talegaon Line: Z2 reach is to set for 120 %of protected line. Then it ovelaps the Z2 reach of 400kV Talegaon-Chakan Line. Z2 time delay of 400 kVTalegaon-Chakan Line (Talegaon end) is 0.35seconds; so Z2 time delay of 400 kV Kalwa-TalegaonLine (Kalwa end) is to be kept as 0.45 seconds toachieve time co-ordination, as per RamkrishnaCommittee guidelines.

Yes Yes

7) 400 kV Talegaon Line: Z3 reach is to be revised asper longest line Kharghar.

Yes Yes

8) 400 kV Talegaon Line: Z3 time delay should becoordinated with HV B/U ROT of 400/220 kV ICTs atTalegaon end; preferably 0.6; to acheve coordinationwith Talegaon adjascent bus.

Yes Yes

9) 400 kV Talegaon Line: Aided DEF function is to bekept off.

Yes Yes

10) For 400/220 kV ICTs: HV & IV B/U relays,harmonic restrain feature is available; it should beenabled.

Yes No Will be done shortly.

11) For all 220 kV Lines: Z4 (rev zone) time delayshould be kept equal to Z2 time delay.

Yes Yes

12) For all 400 & 220 kV Lines: DR setting trigger is tobe set to " drop off or trip".

Yes Yes

13) For all 400 & 220 kV Lines: Z4 resistive reachesare to be kept equal to Z3 resistive reaches.

Yes Yes

1) For all 400 & 220 kV Lines: Zp (REV zone) resistivereaches are to be kept equal to Z3 resistive reaches.

Yes Yes

Vashi7

220kV Apta 220 kV

400 kV Kalwa 400 kV

400 kV Nagothane 400 kV

2) 400 kV Dhabhol 1&2 Lines: Z2 reach is to set for150 % of protected line.Then it ovelaps the Z2 reach of 400 kV Dhabhol-NewKoyna Line and 400 kV New Koyna- stage IV Line .Z2 time delay of 400 kV Dhabhol-New Koyna Line(Dhabhol end) is to be kept as 0.4 seconds and Z2time delay of 400 kV New Koyna- stage IV Line (NewKoyna end) is to be kept as 0.3 seconds; then Z2 timedelay of 400 kV Nagothane-Dhabhol 1&2 Lines(Nagothane end) is to be kept as 0.5 seconds toachieve time co-ordination, as per RamkrishnaCommittee guidelines.

Yes Yes

3) 400 kV Dhabhol 1&2 Lines: Z3 reach should berevised as per 1.2x(PL+LL).Z3 time delay should be revised to 0.7 seconds, afterrevision of Z2 reaches & time delay setting revisions.

Yes Yes

4) For all 400 & 220 kV Lines: Zp (rev zone) timedelay should be kept equal to Z2 time delay.

Yes Yes

5) For SOTF, BI of manual close command is notgiven for: 400 kV Dhabhol 1 Line - Main-1 and 400 kV Dhabhol2 Line- Main1&2.Same is to be provided.

Yes No Will be attended by Dec'17

6) 400 kV Dhabhol 2 Line: N/T s/w contact and Disolator contact to be parallel for TC1 & TC2.

Yes Yes

7) 400 kV Dhabhol 1 Line: Distance Main2 relay-Aided DEF to be disabled.

Yes Yes

8) 400 kV Dhabhol 2 Line: O/V stage 1&2 to beincorporated in M1&2 relays.Checking of DO/PU ratio of all O/V relays is to becarried out.As CVT problems are now resolved, all O/V settingsare to be kept correctly.For 400 kV Dhabhol 1 Line: O/V Stage-1 time delayshall be: 4s;For 400 kV Dhabhol 2 Line: O/V Stage-1 time delayshall be: 6s.

Yes Yes

9) 400 kV Padgha 1&2 Lines: Z2 reach is to set for150 % of protected line. Then it ovelaps the Z2 reachof 400 kV Padgha-Kalwa Line.Z2 time delay of 400 kV Padgha-Kalwa Line (Padghaend) is 0.3 seconds; so Z2 time delay of 400 kVNagothane-Padgha 1&2 Lines (Nagothane end) is tobe kept as 0.4 seconds to achieve time co-ordination,as per Ramkrishna Committee guidelines.

Yes Yes

10) 400 kV Padgha 1&2 Lines: Z3 reach should berevised as per 1.2x(PL+LL).Z3 time delay should be revised to 0.6 seconds, tocoordinate with HV B/U ROT of 400/220 kV ICTs atPadghe end.

Yes Yes

11) For SOTF, BI of manual close command is notgiven for: 400 kV Padgha 1 Line - Main-1 and 400 kV Padgha 2Line- Main1.Same is to be provided.

Yes No Will be attended by Dec'17

Vashi7


12) For Padgha 1, Main-1: VT sup: 3P detection is tobe made ON.I2 & I0: setting to be revised to 100mA.

Yes Yes

13) For Padgha 2, Main-1:I2 & I0: setting to be revised to 100mA.Delta I: setting to be revised to 100mA.

Yes Yes

14) 400 kV Padgha 1&2 Lines:O/V stage 1&2 to be incorporated in M1&2 relays.Checking of DO/PU ratio of all O/V relays is to becarried out.As CVT problems are now resolved, all O/V settingsare to be kept correctly.For 400 kV Padgha 1 Line: O/V Stage-1 time delayshall be: 4s;For 400 kV Padgha 2 Line: O/V Stage-1 time delayshall be: 6s.

Yes Yes

15) 220 kV Wadkhal 1&2 Lines: Z2 reach is to set for150 % of protected line. Z2 time delay of 400 kVNagothane-Wadkhal 1&2 Lines (Nagothane end) isto be kept as 0.4 seconds to achieve time co-ordination, as per Ramkrishna Committee guidelines.

Yes Yes

16) 220 kV Wadkhal 1&2 Lines: Z3 reach should berevised as per 1.2x(PL+LL).Z3 time delay should be kept to 0.7 seconds.

Yes Yes

17) 220 kV Wadkhal 1&2 Lines: TOR is to be enabledin SOTF.

Yes Yes

18) 220 kV Wadkhal 1&2 Lines: Power swing is to beblocked for all zones.

Yes Yes

19) 220 kV IPCL Line: Z3 reach is to be revised as per1.2x(PL+LL) & as per longest line SPCL.

Yes Yes

20) 220 kV POSCO Line: Z2 reach is to set for 120 %of protected line.Then it ovelaps the Z2 reach of 220 kV POSCO-Kharghar Line.Z2 time delay of 220 kV POSCO-Kharghar Line(POSCO end) is kept as 0.3 seconds,so Z2 time delay of 220 kV Nagothane-POSCO Line(Nagothane end) is to be kept as 0.4 seconds toachieve time co-ordination, as per RamkrishnaCommittee guidelines.

Yes Yes

21) 220 kV POSCO Line: Z3 reach is to be revised asper 1.2x(PL+LL).

Yes Yes

22) 220 kV MSL Line:Z3 time delay should be revised, to coordinate withHV B/U ROT of Transformers at MSL end.

Yes Yes

23) 220 kV ACCIL Line: Z3 reach is to be revised asper 1.2x(PL+LL).

Yes Yes

24) 220 kV ACCIL Line: Over Current Plug settingshall be 1.25xIn; ROT shall be taken 0.500 s for TMScalculations.

Yes Yes

25) All 220 kV Lines back up relay settings shall berevised considering new fault level. Consider 90% offault contribution. WithO/C P.S.: 1.25 (1 for Wadkhal 1&2)E/F P.S.: 0.3

Yes No Will be attended in next outage

Vashi7


1) At 110 kV Neral S/S, distance protection relay,back up relay settings, for both lines, are provided byM/S Tata power.Following revisions in protection settings arerecommended on basis of Ramakrishna committee(RC) guidelines; which shall be discussed with M/STata power; and revision shall be carried out incoordination with M/S Tata power.

Yes No To be co-ordinated with M/s TATA.

2) For 110 kV Ambernath line, Line length is 40.34 kmin Dist relay, and 42 km in calculation sheet. It is to beconfirmed in coordination with M/S Tata power.


3) For 110 kV Ambernath Line & Bhivpuri Line:- Z3time delay is 2S; while as per RC, Z3 time shall be 0.8to 1 S .It is to be confirmed in coordination with M/STata power.


4) For 110 kV Ambernath Line & Bhivpuri Line:- Z4(Rev Zone) time delay is 2S; while as per RC, Z4 timeshall be equal to Z2t i.e. 0.35 S. It is to be confirmedin coordination with M/S Tata power.


5) For 110 kV Ambernath Line & Bhivpuri Line:- PSBΔR=1Ω & ΔX=1Ω; needs revision. It is to beconfirmed in coordination with M/S Tata power.


6) For 110 kV Ambernath Line & Bhivpuri Line:- ARdead time is 500mS & reclaim time is 20 S; needsrevision as per RC. It is to be confirmed incoordination with M/S Tata power.


7) For 110 kV Bhivpuri Line:- As per calculation sheet,ph to ph Z2 reach is overlapping remote endgenerator equipments; hence Z2 shall be timecoordinated with generator back up protections.


8) For 110 kV Ambernath Line & Bhivpuri Line:- Backup protection O/C P.S. is 1.1; E/F P.S. is 0.5; curve is VI(IEC). The reasoning behind these settings and ROTon remote end bus fault shall be confirmed incoordination with M/S Tata power.


9) For both Transformers, Back up relay settings shallbe revised as per guidelines.

Yes Yes

110 kV Neral 110 kV

Vashi7

1 220 YES11.02.13 &

12.02.13 YES 11 3 8 10 3 7 1 0 1

2 220 YES13.02.13 &

14.02.13 YES 17 11 6 13 11 2 4 0 4

3 400 YES13.02.13 &

14.02.13 YES 15 10 5 15 10 5 0 0 0

4 220 YES12.03.13 &

13.03.13 YES 18 6 12 11 6 5 7 0 7

5 400 YES12.03.13 &

13.03.13 YES 16 9 7 12 9 3 4 0 4

6 220 YES11.02.13 &

12.02.13 YES 31 7 24 11 6 5 20 1 19

7 220 YES06.04.15 &

07.04.15 YES 1 1 0 1 1 0 0 0 0

8 400 YES06.04.15 &

07.04.15 YES 4 4 0 4 4 0 0 0 0

9 132 YES

22.04.13 &23.04.13

YES 12 4 8 5 4 1 7 0 7

10 132 YES

22.04.13 &23.04.13

YES 13 5 8 7 5 2 6 0 6

Third Party Protection Audit Report of MPPGCL for Qtr-II (Jul-17 to Sep-17)Name of the entity :- MPPGCL FY: 2017-18

S.No.Name ofthe S/s

KV

Whetheridentified for If identified for PA

DeficienciesObserved No.of Deficiencies No.of Deficiencies attended

No.of Deficiencies not yetattended

Yes No PAconducted

if notdone,

Yes No Total CategoryA

STPS

ATPS

SGTPS

SGTPS

STPS

CategoryB

Total CategoryA

CategoryB

CategoryB

Total CategoryA

TONS

SSTPS

SSTPS

BARGI

GANDHISAGAR

Yes NoPA

conductedon date

If notdoneTaget

Yes No TotalCatergory

ACatergory

BTotal

CatergoryA

CatergoryB

TotalCatergory

ACatergory

B

1 400KV S/s Bhopal 400KV Yes 17.01.13 5 5 0 5 4 0 4 1 0 12 220KV S/s Bhopal 220KV Yes 22.04.13 4 4 0 4 3 0 3 1 0 13 220KV S/s Mandideep 220KV Yes 26.04.13 3 3 2 1 3 2 1 0 0 04 220KV S/s Mandideep 220KV Yes 07.05.13 3 3 3 0 3 3 0 0 0 05 400KV S/s Bina 400KV Yes 12.02.13 10 10 9 1 10 9 1 0 0 06 400KV S/s Katni 400KV Yes 17.01.13 8 8 6 2 8 6 2 0 0 07 220KV S/s Gwalior 220KV Yes 27.04.13 5 5 2 3 3 2 1 2 0 28 220KV S/s Malanpur 220KV Yes 01.05.13 8 8 6 2 5 5 0 3 1 29 220KV S/s Mehgaon 220KV Yes 30.04.13 6 6 5 1 5 5 0 1 0 1

10 220KV S/s Shujalpur 220KV Yes 24.04.13 5 5 4 1 5 4 1 0 0 0

11 220KV S/s Hoshangabad 220KV Yes 09.05.13 4 4 4 0 4 4 0 0 0 0

12 220KV S/s Itarsi 220KV Yes 07.05.13 6 6 6 0 6 6 0 0 0 0

13220KV S/s South ZoneIndore

220KV Yes 23.04.13 5 5 3 2 4 3 1 1 0 1

14 220KV S/s Pithampur 220KV Yes 25.04.13 5 5 4 1 5 4 1 0 0 015 220KV S/s Barwaha 220KV Yes 26.04.13 6 6 5 1 6 5 1 0 0 016 220KV S/s Jabalpur 220KV Yes 24.04.13 4 4 3 1 3 3 0 1 0 117 220KV S/s Rewa 220KV Yes 29.04.13 8 8 6 2 6 6 0 2 0 218 220KV S/s Satna 220KV Yes 01.05.13 6 6 3 3 3 3 0 3 0 319 220KV S/s Damoh 220KV Yes 06.05.13 4 4 4 0 4 4 0 0 0 020 220KV S/s Sagar 220KV Yes 09.05.13 4 4 2 2 2 2 0 2 0 221 220KV S/s Barod 220KV Yes 24.04.13 1 1 1 0 1 1 0 0 0 022 220KV S/s Julwania 220KV Yes 08.05.13 6 6 5 1 6 5 1 0 0 023 220KV S/s Nimrani 220KV Yes 06.05.13 3 3 2 1 3 2 1 0 0 024 220KV S/s Jetpura 220KV Yes 08.05.13 1 1 1 0 1 1 0 0 0 0

No. of Defeciencies No. of Defeciency attendedNo. of Defeciencies not yet

attended

Third Party Protection Audit Report of MPPTCL for Qtr-II (Jul-17 to Sep-17)Name of Utility Name of Entity - MPPTCL FY : 2017-18

Sr.No.

Name of the S/s KV

Weatheridentified

of PAIf identified for PA

Deficiencyobserved

Yes NoPA

conductedon date

If notdoneTaget


ACatergory

BTotal

CatergoryA

CatergoryB

TotalCatergory

ACatergory

B


attended


Sr.No.

Name of the S/s KV

Weatheridentified


Deficiencyobserved

25 220KV S/s Ujjain 220KV Yes 26.04.13 1 1 1 0 1 1 0 0 0 026 220KV S/s Ratlam 220KV Yes 06.05.13 2 2 2 0 2 2 0 0 0 027 400KV S/s Nagda 400KV Yes 18.01.13 8 8 7 1 8 7 1 0 0 028 400KV S/s Indore 400KV Yes 18.01.13 9 9 8 1 9 8 1 0 0 01 220KV S/s Chichli 220KV Yes 13.03.15 3 3 1 2 2 1 1 1 0 12 220KV S/s Sukha 220KV Yes 12.03.15 4 4 3 1 4 3 1 0 0 03 220KV S/s Narsinghpur 220KV Yes 13.03.15 3 3 2 1 2 2 0 1 0 14 220KV S/s Pipariya 220KV Yes 16.03.15 8 8 7 1 7 6 1 1 1 05 220KV S/s Guna 220KV Yes 13.03.15 10 10 4 6 8 4 4 2 0 26 220KV S/s Shivpuri 220KV Yes 15.03.15 7 7 2 5 5 2 3 2 0 27 220KV S/s Sabalgarh 220KV Yes 17.03.15 7 7 5 2 6 5 1 1 0 18 220KV S/s Nagda 220KV Yes 16.04.15 6 6 5 1 5 5 0 1 0 19 220KV S/s Tikamgarh 220KV Yes 13.03.15 11 11 8 3 10 8 2 1 0 1

10 220KV S/s Seoni 220KV Yes 11.03.15 5 5 3 2 4 3 1 1 0 111 220KV S/s Chhatarpur 220KV Yes 13.03.15 8 8 5 3 7 5 2 1 0 112 220KV S/s Sarni 220KV Yes 14.03.15 3 3 2 1 2 2 0 1 0 113 220KV S/s Pandurna 220KV Yes 13.03.15 4 4 0 4 3 0 3 1 0 114 220KV S/s Chhindwara 220KV Yes 12.03.15 3 3 0 3 2 0 2 1 0 115 220KV S/s Betul 220KV Yes 15.03.15 3 3 1 2 1 1 0 2 0 216 220KV S/s Daloda 220KV Yes 15.04.15 6 6 5 1 5 5 0 1 0 117 220KV S/s Anuppur 220KV Yes 17.03.15 25 25 19 6 20 19 1 5 0 518 220KV S/s Badnagar 220KV Yes 06.04.15 8 8 6 2 8 6 2 0 0 019 220KV S/s Indore Eas 220KV Yes 12.03.15 10 10 7 3 8 6 2 2 1 120 220KV S/s Dhar 220KV Yes 07.04.15 11 11 9 2 10 9 1 1 0 121 220KV S/s Neemuch 220KV Yes 16.04.15 8 8 6 2 7 6 1 1 0 122 220KV S/s Vidisha 220KV Yes 07.04.15 6 6 4 2 6 4 2 0 0 0

Yes NoPA

conductedon date

If notdoneTaget


ACatergory

BTotal

CatergoryA

CatergoryB

TotalCatergory

ACatergory

B


attended


Sr.No.

Name of the S/s KV

Weatheridentified


Deficiencyobserved

23220KV S/s RajgarhBaiora

220KV Yes 08.04.15 8 8 6 2 6 6 0 2 0 2

24 220KV S/s katni 220KV Yes 08.04.15 8 8 6 2 7 6 1 1 0 125 220KV S/s Nepanagar 220KV Yes 08.04.15 11 11 4 7 9 3 6 2 1 126 220KV S/s Sidhi 220KV Yes 09.04.15 6 6 3 3 2 2 0 4 1 327 220KV S/s Maihar 220KV Yes 07.04.15 5 5 3 2 2 2 0 3 1 228 220KV S/s Bairagarh 220KV Yes 06.04.15 6 6 5 1 5 5 0 1 0 129 220KV S/s Dewas 220KV Yes 08.04.15 5 5 4 1 4 4 0 1 0 130 220KV S/s Handiya 220KV Yes 09.04.15 7 7 3 4 6 3 3 1 0 131 220KV S/s Kotar 220KV Yes 08.04.15 8 8 5 3 5 5 0 3 0 332 220KV S/s Rajgarh 220KV Yes 13.03.15 12 12 10 2 11 10 1 1 0 1

33220KV S/s BirsinghpurPali

220KV Yes 16.03.15 23 23 15 8 17 12 5 6 3 3

of 2

Name of the Organization: NTPC Limited-WR stations

Sr.No Deficiency Observed during BasicProtection Audit

Action taken / proposed to betaken

TimeSchedule

Name of the Sub-station / Switchyard: Vindhyachal STPP

1. Replacement of balance Staticdistance protection relays, withNumerical relays, in line withGazette notification of GOI for 400kV Satna 1 & 2 lines.

Completed Complied-Bcategory

2. 63 MVAR Bus reactor needs to betaken into service.

Put in service Complied-Bcategory

3. Main-I and Main-II Distanceprotection Schemes for all feedersneed to be different make/characteristic for 400 kV Sasan,Mahan, and Satna-III & IV lines.

Being adopted. Complied-Bcategory

4. Earth fault in 220 V switchyard DCsystem to be attended.

Ongoing routine activity Complied-Acategory

Name of the Sub-station / Switchyard: Korba STPP

1. Over voltage relay: Drop off to Pick upratio is not explicitly available inMicom relays.

Minimum Drop off / pick up ratioof 95% is available in MiComrelay and it is in order as far asover voltage protection isconcerned. With a very highreset/operate ratio, chatteringphenomena may be observed inrelay.

Complied-Acategory

2. Power swing blocking is enabled forZ2, Z3 and Z4. However de-blockingtimer is set at 2 sec. The same maybe reviewed.

Power swing blocking logic has tobe universally decided across thegrid. De-block timer of 2 sec hasbeen adopted in all NTPCstations and is in line with NRPC /ERPC recommended settingguideline.

Complied-Acategory

3. Auto re-close relay reclaim timer notuniform for all lines. Stage-I lines ishaving 10 secs and the same is 25secs for stage-II lines. This may bereviewed.

Reclaim time of 25secs to beadopted for all lines as per NTPCpractice.

Complied-Acategory

of 2



TimeSchedule

4. Zone 2 time delay is different fordifferent lines (300ms and 400ms).The same may be reviewed.

As per NTPC practice, Zone-2time delay of 400ms is beingadopted & it is 500ms in case oflong lines followed by short lines.The same to be adopted.

Complied-Acategory

Name of the Sub-station / Switchyard: Sipat STPP

1. Time Synchronization: All numericalrelays except 5 nos relays of 765KVand 4 nos of relays of 400KV are timesynchronized.

Taken up with OEM. Only 01relay could be synchronized withGPS successfully.

Complied-Bcategory

2. Time setting of both Stage-I andStage-2 are same in all 765KV and400KV LBB relays.

The setting has been reviewedand found in order.

Complied-Acategory



Complied-Acategory



Complied-Acategory

Name of the Sub-station / Switchyard: Jhanor Gandhar GPS

1. Replacement of existing static relaysfor line protection with Numericaldistance relays.

PO placed. Complied-Bcategory

Remarks

Yes /No


If notattended,

reason

Yes /No



400 KVKhedamara

400/ 220KV

TractebelIndia,WRLDC &

CSPTCLEngineers

12 - 20 Feb'16

1. M II protection for 220 KV BRSSI&II,Raipur,Urla,Bemetara and Thelkadihfeeders are not available.2. DC leakage to be monitored

S.No.2 Yes ---- S.No.

1 No 31.12.2016 ----

220 KVBemetara

220/ 132KV

CSPTCLEngineers 13.03.13

1. Carrier protection is not available..2. 2nd DC battery set is not available.3. GPS time synchronizing facility is notavailable.4. M II protection for 220 KV feeder notavailable.5. DC leakage to be monitored.

S.No.5 Yes ---- Yes for S.No.

1 to 4 No 31.12.2016 ----

220 KV Gurur 220/ 132KV


1. Carrier protection is not available..2. M II protection for 220 KV feeder notavailable.3.DC leakage to be monitored.


1 & 2 No 31.12.2016 ----

220 KV Suhela 220/ 132KV


1. Carrier protection is not available..2. GPS time synchronizing facility is notavailable.3. M II protection for 220 KV feeder notavailable.4. DC leakage to be monitored.


1 to 3 No 31.12.2016 ----

220 KVBhatapara

220/ 132KV


1. Carrier protection is not available..2. 2nd DC battery set is not available.3. GPS time synchronizing facility is notavailable.4. M II protection for 220 KV feeder notavailable.5. DC leakage to be monitored.6. LBB protection not available.


1 to 6 except 5 No 31.12.2016 2nd battery setcomm.

220 KV Mopka 220/ 132KV


1. Carrier protection is not available..2. 2nd DC battery set is not available.3. GPS time synchronizing facility is notavailable.4. M II protection for 220 KV feeder notavailable.5. DC leakage to be monitored.6. LBB protection not available.7. Synchronization trolly not available.


1 to 7 except 5 No 31.12.2016 ----

220 KV Banari 220/ 132KV




1 to 6 except 5 No 31.12.2016 ----

220 KV Siltara 220/ 132KV




1 to 7 except 5

NoexceptS.No. 2

31.12.2016 2nd Battery setcomm.

PROTECTION AUDIT DEFFICIENCIES/OBSERVATIONS COMPLIANCE [As on 30.09.2017]Name of Utility : CHHATTISGARH POWER TRANSMISSION COMPANY LIMITED

Name of S/Sidentified for

protectionaudit

S/Svoltage

Name of 3rdparty protection

audit agency

Date on whichaudit

conductedObservations of protection audit

Deficiencies that can be correctedwithout procurement (Category-A)

Deficiencies involving procurement(Category-B)

Remarks

Yes /No


If notattended,

reason

Yes /No





protectionaudit

S/Svoltage


audit agency

Date on whichaudit




220 KV Doma,Raipur

220/132KV




1 to 4 No 31.12.2016 -

220 KVParaswani

220/132KV




1 to 5 except 5

NoexceptS.No. 2


220 KV Urla 220/ 132KV



S.No.5 Yes ---- Yes for S.No.1 to 6 except 5

NoexceptS.No. 2


220 KVThelkadih

220/132KV

CSPTCLEngineers



1 to 4 except 2

NoexceptS.No. 2


220 KVBarsoor

220/132KV




1 to 6 except 5

NoexceptS.No. 2


220 KV Bhilai 220/132KV


1. Carrier protection is not available.2. M II protection for 220 KV feeder notavailable.3. DC leakage to be monitored.4. LBB protection not available.


1 to 4 except 3 No 31.12.2016 ----

220 KVKotmikala

220/ 132KV




1 to 7 except 5 No 31.12.2016 ----

Remarks

Yes /No


If notattended,

reason

Yes /No





protectionaudit

S/Svoltage


audit agency

Date on whichaudit




220 KVRaigarh

220/ 132KV




1 to 7 except 5 No 31.12.2016 ----

Remarks

Yes /No


If notattended,

reason

Yes /No





protectionaudit

S/Svoltage


audit agency

Date on whichaudit




1. Separate two sets DC system isrecommended for switchyard protection No Yes No

Estimate andRequisition forseparate DC sourcehas been sent forapproval.

2. Carrier Protection is out of service. Yes

Yes, for 220kV KorbaEast-WestI/C No. I&II

Rest feeder'scarrier prot.ckt checked& founddefiencies

Yes NoFor carrier protectionpanel/cardsprocurementrequired.

3. Disturbance Recorder and SERs arenot available. Yes No

Tenders opened &procurement underprogress.

4. Old THR make Static DPR relaysneeds to be replaced by numericalrelays

Yes Yes Attended

5. Auto re-closer is not available. Yes NoChecking ofcircuits underprogress.

Auto reclose of 220KV Korba-Budipadarckt-3 is checked &put in service.In otherfeeders A/R ckts isOK and will be put inservice afterconfirmation fromother end.

6. Bus Bar Differential scheme is notavailable. Yes No

7. All relay settings are verified andfound to be generally in order. Yes Yes

8. Multiple Earthing is not found in CTsecondary. Yes Yes

9. PSB feature is Enabled for Z2, Z3,and Z4. Yes Yes

10. Synchronizing Panel is available forall feeders except Budhipadar FeederNo-III for that individual SynchronizingTrolley has provided.

Yes Yes

Name of Utility : CHHATTISGARH POWER GENERATION COMPANY LIMITED

220 KV KTPS,Korba (E) 220 KV

M.K.BanchhorCSPTCL,

N.P.DewanganNTPC, N.K.BizoraCSPGCL, G.P.Rai

CSPGCL,S.C.Chakraborty

CSPGCL

25.04.2013

Remarks

Yes /No


If notattended,

reason

Yes /No





protectionaudit

S/Svoltage


audit agency

Date on whichaudit




1) Two independent source of 220 V DCare available in Switchyard.No DCleakage observed.

YES YES

2) All relay settings are verified & foundgenerally in order. YES YES

3)Dual channel carrier protection isavailable in all 220 KV feeders but keptout YES No

Due to nonavailability ofPanel atremote end.

4) DRs are available in Numeric relaysand SER is available. YES YES

5)Multiple earthing of CT secondary coreis not available.CT secondary earthing isprovided in Panel only.

YES YES

6) 01 no synchronising trolley isavailable & in working condition. YES YES

7)PSB feature is enabled & in blockingcondition for Z2,Z3 & Z4. YES YES

8) Auto reclose is available but presentlykept out. YES No

As carrierprotection isout.

9) Bus Bar differential scheme isavailable but presently kept out.

YES No

To becheckedbefore put inservice

30.06.2016Order placed on M/sABB forrecommissioning.

1) Un availability of Main-II protection

Yes

2) Un availability of Auto reclosescheme.

Yes

3)Un availability of B/B differential & LBBprotection

No Yes

Bus Bar protectionhas beencommissioned on27.04.16.Presently itis in service.

4)GPS is available however no relay issynchronised with it. No Yes

Korba WestTPS 400 KV NTPC & CSPTCL

Engineers 26.04.2013

220 KVDSPMTPS,

Korba220 KV

Third PartyProtection Audit

was carried out bySE(ET&I-I)

HTPS,CSPGCL,Representative of

NTPC,EE,CSPTCL,EE(Testing),DSPMTPS,CSPGCL

25.04.2013

Remarks

Yes /No


If notattended,

reason

Yes /No





protectionaudit

S/Svoltage


audit agency

Date on whichaudit




5) Committee recommended to replaceABCB with SF6 breakers &commissioning of isolator sequentialoperation with ABCB opening.

No No 31.03.2017

Replacement ofABCB with SF6breakers is underprogress.



Remarks

Yes /No


If notattended,

reason

Yes /No





protectionaudit

S/Svoltage


audit agency

Date on whichaudit




1) Second DC system is recommended .Yes No 31.03.2017

Proposed in the year16-17 in Refurbish

Scheme.2) To renovate/retrofit Main-I & Main-IIProtection with numeric relays in all outgoing feeders.

Yes

Main-I & Main-IIProtection withnumeric relays in allout going feederscompleted on28.12.2014

3) Carrier Protection is not in service.

02 no. havebeencommissioned in KEB-KWB interconnectors

Yes No 31.09.2016

In KEB-KWBinterconnector I & IIcarrier protection hasbeen taken inservice.In KW-DSPMI/C,action fromDSPM isawaited.Other 3feeders falls underCSPTCL scope

4) Disturbance Recoder and SER s arenot available.

Yes No 31.12.2016

Bay control panelsfor SCADA systemhave been received.M/s ABB is beingpersuaded tocommission thesame as early aspossible.

5) Non availability of Auto reclosescheme.

Yes No 30.12.2016

Scheme is readyfrom KWBend,waiting forconsent forconnected substations.

6) Non availability of B/B differential

Yes No 31.12.2016 Work underprogress.

7) Non availability of LBB protection

Yes YES LBB has been kept inservice

8)GPS is available however no relay issynchronised with it.

Yes No 31.12.2016

After commissioningof SCADA panel,Relays will besynchronised.GPSfacility is available inSCADA.



of 2

Name of the Organization: NTPC Limited-WR stations



TimeSchedule

Name of the Sub-station / Switchyard: Vindhyachal STPP

1. Replacement of balance Staticdistance protection relays, withNumerical relays, in line withGazette notification of GOI for 400kV Satna 1 & 2 lines.

Completed Complied-Bcategory

2. 63 MVAR Bus reactor needs to betaken into service.

Put in service Complied-Bcategory

3. Main-I and Main-II Distanceprotection Schemes for all feedersneed to be different make/characteristic for 400 kV Sasan,Mahan, and Satna-III & IV lines.

Being adopted. Complied-Bcategory

4. Earth fault in 220 V switchyard DCsystem to be attended.

Ongoing routine activity Complied-Acategory

Name of the Sub-station / Switchyard: Korba STPP



Complied-Acategory



Complied-Acategory

3. Auto re-close relay reclaim timer notuniform for all lines. Stage-I lines ishaving 10 secs and the same is 25secs for stage-II lines. This may bereviewed.

Reclaim time of 25secs to beadopted for all lines as per NTPCpractice.

Complied-Acategory

of 2



TimeSchedule

4. Zone 2 time delay is different fordifferent lines (300ms and 400ms).The same may be reviewed.

As per NTPC practice, Zone-2time delay of 400ms is beingadopted & it is 500ms in case oflong lines followed by short lines.The same to be adopted.

Complied-Acategory

Name of the Sub-station / Switchyard: Sipat STPP

1. Time Synchronization: All numericalrelays except 5 nos relays of 765KVand 4 nos of relays of 400KV are timesynchronized.

Taken up with OEM. Only 01relay could be synchronized withGPS successfully.

Complied-Bcategory

2. Time setting of both Stage-I andStage-2 are same in all 765KV and400KV LBB relays.

The setting has been reviewedand found in order.

Complied-Acategory



Complied-Acategory



Complied-Acategory

Name of the Sub-station / Switchyard: Jhanor Gandhar GPS

1. Replacement of existing static relaysfor line protection with Numericaldistance relays.

PO placed. Complied-Bcategory

Format for Protection Audit - wrpc.gov.in · 1 2 3 4 5 6 7 8 9 10 11 12 13 Yes/ No Whether attended...

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Transcript of Format for Protection Audit - wrpc.gov.in · 1 2 3 4 5 6 7 8 9 10 11 12 13 Yes/ No Whether attended...