Specification Mdb

8/11/2019 Specification Mdb

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2/19

Ade*uate diameter holes and gland plates shall be pro!ided forsecuring all incoming and outgoing cables. 4land plates shall beremo!able and shall be of ade*uate si8e for the particular cables to beterminated, using mechanical type compression glands to B 61)1 "ithmoisture proof seals. +n incoming circuit, "here t"o cables areconnected in parallel to form the incoming feeder, the t"o cables shall

be separately glanded. The design should be done such a "ay to a!oidthe induced current "hen single core cables are using..

Cable Type Qty. Type of Entry +ncoming:1 00mm)u&;'P#&P


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5. CIRCUIT BREACKERS

5.1. A! C!"#$ B!%&%!(

Air Circuit Breakers shall be of four-pole, withdrawal type with individual, self-contained,motor wound spring,solenoid or other approved type power operate mechanism. It shall

be comply with IEC tandard !"#-$, !"#-% &B E' ()!"#-%* and !"#-+.

he operating mechanisms of the circuit breakers shall be of the stored-energy uick-make/ and free-trip/ type. hey shall ensure positive on/ and positive off/ indications.heir hermal 0ated Current I$)shall be at least euivalent to the nominal current of thecircuits they have to protect.heir 0ated 1perating 2oltage U%shall be at least euivalent to the rated voltage of theinstallation. heir 0ated Insulation 2oltage U shall be at least #3)2 AC. heir erviceBreaking Capacity I"( shall be at least euivalent to the ma4imum presumed three-phaseshort-circuit current which may occur on their out-going terminals. heir 0ated 5akingCapacity I"*shall allow the breakers to be closed on the ma4imum presumed three-phase

short-which may occur on their out-going 6terminals.

ACB shall be possible lock at the open position.

5.2. M+#,-%- C&(% C!"#$ B!%&%!(

Moulded ase ircuit Brea7ers MB@s- shall be of four3pole asspeci$ed. +t shall comply "ith +# 23) and shall be totally enclosed ina moulded casing formed from an insulating material. The constructionof the casing shall be capable of "ithstanding the appropriate ratedshort circuit current and reasonably rough use "ithout fracture ordistortion.

The operating mechanism shall be of the *uic73made, *uic73 brea7, trip3free type "ith the speed of operation independent of the operator. Themechanism shall be designed to operate all poles simultaneously duringopening, closing and tripping conditions. The brea7ers shall be operatedby a toggle unless other"ise speci$ed.

The brea7ers shall be pro!ided "ith thermal bi3metallic elements for anin!erse time3current trip characteristic to protect against sustainedo!erloads and instantaneous magnetic trip elements for short circuits

protection.

Thermal trips shall be adustable. A single adustment shall ensure thesetting of all poles in a multi3pole brea7er simultaneously.

. INTERLOCKING

There shall be pro!ided an interloc7ing scheme "itch shall ensure the safeoperation under all ser!ice conditions.

Mechanical interloc7s shall be employed "here practicable and shall beeecti!e at the point "here hand po"er is applied so that stress cannot betransferred to parts remote from that point.


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#lectrical interloc7s shall so function as to interrupt the operating supplyand an appro!ed system of interloc7s shall be pro!ided and shall includefor emergency manual operation of e*uipment "hich is normally po"eroperated. 9ailure of supply or its restoration after an outage- orconnections to any electrical interloc7s shall not produce or permit faulty

operation.

Chere 7ey interloc7ing is employed, tripping of the circuit brea7er shallnot occur if any attempt made to remo!e the trapped 7ey from themechanism. #mergency tripping de!ices shall be 7ept separate and distinctfrom the 7ey interloc7ing system and shall be clearly labelled, suitablyprotected from inad!ertent operation but readily accessible. Theinterlocking system should avoid the situation of closing all threecircuit breakers at same time.

/. PANEL BOARD E0UIPMENTS

9ollo"ing components shall be incorporated "ith the internal "iring assho"n in the single line diagram.

%os. of )000A P )=7AAB "ith mechanical and electricalinterloc7s and auto change o!er facility.

1 %os. of 1)00A P )=7A MB %os. of )=0A P )=7A MB

) %os. of )00A P )=7A MB

1 %os. of 160A P )=7A MB

1 %os. of 1)=A P )=7A MB

%os. of 0A P )=7A MB

%os. of 60A P )=7A MB

) %os. of 0A P )=7A MB

) %os. of #arth 9ault Eelays "ith necessary urrent Transformers

) %os. of Fnder


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) terminals to get po"er supply a!ailability indication signal fromfeeder 01 H feeder 0) for generator controlling.

At transferring states there should be adustable time delaybet"een changes of brea7er positions. The delays shall beadustable bet"een 0360 seconds.

Manual&Automatic changeo!er selection s"itch. +n automatic operation mode it should not be possible to close

brea7ers manually.

Automatic operation should be done as follo"s

eeder !1"tatues

eeder !2"tatues

#e$uired %reaker&osition'If any (C% has notTripped)

Po"er A!ailable Po"er %otA!ailable

AB 01 loseAB 0) openAB 0 lose

Po"er %otA!ailable

Po"er A!ailable AB 01 openAB 0) loseAB 0 lose

Po"er A!ailable Po"er A!ailable AB 01 loseAB 0) loseAB 0 open

Po"er %otA!ailable

Po"er %otA!ailable

AB 01 openAB 0) open

AB 0 open

. ARRANGEMENT OF COMPONENT PARTS

Panel board shall include all necessary components and accessories toform a complete assembly. omponents and accessories shall be $rmly$(ed in position in the panel board, shall be assemble in such a "ay that itshall be possible to remo!e or replace any component parts and to carryout cable connection from the front. Ample space shall be allo"ed forcabling and terminal arrangements.

All internal "iring shall be carried out neatly and shall "here!er possiblebe housed in "iring trun7ing forming an integral part of the panel board.MB, MB, relays, fuses etc. shall be arranged neatly in a ro" or ro"s.All components shall be totally concealed. 5nly the toggles of MBs andoperating interface of ABs shall be protrude through co!er plate of thepanel board.

All li!e terminals and components "ithin any panel shall be shielded insuch a manner as to pre!ent inad!ertent contact "ith them. All li!eterminals and components mounted on panel doors shall be shrouded suchthat contact can only be made after remo!al of the shroud.

'abels or other means of identi$cation shall be pro!ide for e!ery item ofpanel board and associated e*uipment to indicate the purpose of the item.


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The labels shall be $(ed at the front co!er of the panel board or at theinside face plate.

. EARTHING

A copper earthing bar complying "ith B 1) si8ed to "ithstand the short

time current of the s"itchboard shall be securing $red to and e(tend thefull length of the s"itchboard and be connected to an earthing terminal ateach end. All metal "or7 other than current carrying parts- shall bebonded to the earthing bar and pro!ision shall be made for bonding thearmouring and metal sheath of incoming cables.

1. PROVISION FOR SPARE WAYS

Panel board shall be pro!ided "ith at least t*o numbers of spare *aysper busbarfor future e(pansions. #ach spare "ay shall be blan7ed o"ith a suitable blan7ing plate ha!ing a $nish comparable to that of thepanel board.

11. INSPECTION TESTING AND COMMISSIONING

The contractor should submit a set of shop dra"ings 1 days beforestarting the construction of the panel, to appro!al of the engineer. 5nreceipt of the #ngineer@s appro!al, the panel board shall be completed inall details and installed at the site before inspection and testing. Thecontractor shall gi!e ade*uate notice of completion to allo" for this

inspection to be made. As3built dra"ings in the $nal form shall befurnished in three 0- copies on or before the commissioning date.

The testing shall include all tests necessary to pro!e that the panel board isentirely suitable for the purpose and operational tests of all e*uipmentincluding interloc7s and protection de!ices, "ith stimulation of all e(ternalcircuit functions.

Fpon satisfactory commissioning the engineer shall authorise the ta7ingo!er and "ill issue the appropriate certi$cate in accordance "ith thecondition of contract.

%I++ , Q-(TITIE"

MAIN DISTRIBUTION BOARD FOR PROPOSED OFFICE AND LABORATORY COMPLEX FOR

GOVERNMENT ANALYST'S DEPARTMENT AT PALAWATTA

+tem

%o

Description

Fnit

Ity Amount

Before


7/19

1upply at site, installation, testing andcommissioning of 1600A Main PanelBoard and follo"ing items.

- %os. of )000A P )=7A AB "ithmechanical and electrical interloc7sand auto change o!er facility.

-1 %os. of 1)00A P )=7A MB

- %os. of )=0A P )=7A MB- ) %os. of )00A P )=7A MB- 1 %os. of 160A P )=7A MB- 1 %os. of 1)=A P )=7A MB- %os. of 0A P )=7A MB- %os. of 60A P )=7A MB- ) %os. of 0A P )=7A MB- ) %os. of #arth 9ault Eelays "ith

necessary urrent Transformers-

) %os. of Fnder


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ignature of Bidder ....................... ................................... ............... .................

'ame > Address of Bidder ..........................................................................................

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ignature of itness &$* ignature of itness &%*

'ame > Address of itness &$* 'ame > Address of itness &%*

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1 Enclosure ection

Manufacturer

Dimension m(m(m

Material heet steel

Thic7ness mm %ot less than )9inish Po"der coated

Eated +nsulated


9/19

+ngress of Protection %ot less than +P

Method of installation 9loor standing

9orm

olour

able onnection

+ncoming ables Bottom of the 5utgoing ables Top of the panel

+nternal separation sheet mm %ot less than 1

2 2!!!( (ir Circuit ection

Ma7e

Model

%o. of poles

Eated current A )000

Eated ser!ice !oltage <

Eated insulation !oltage <

Eated impulse "ithstand 7


10/19

Trip unit adustment range

Thermal ( +n

Magnetic ( +n

8 2!!( 5CC% ection

Ma7e

Model

ountry of origin

%o. of poles

Eated current A )00

Eated ser!ice !oltage <

Eated insulation !oltage <

Eated impulse "ithstand 7


11/19


12/19

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13/19

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14/19

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18/19

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19/19

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1 ingle 'ine Diagram for Main Distribution D#'&D&00

) Panel Eoom Detail D#'&PB&00

Specification Mdb

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