(10) Calculate Insulation Resistance Value and PI Value
24
Minimum IR Value for Rotating Machine (AC or DC) Machine Terminal to Terminal Voltage 0.44 IR (Min) for Machine 1.44 Minimum IR Value for Transformer Frequency 50 Voltage Rating of winding under Test 440 Rated Capacity of Winding under Test 1.6 Select Type of Transformer Tank Oil Filled T.C 1 Without Tank Oil filled T.C Dry or Compound Fill T.C IR (Min) for Transformer 521.8 Minimum IR Value for Cable Type of Cable Type of Insulation Material Outer Diameter of Conductor Insulation Diameter of Conductor IR (Min) for Cable Minimum IR Value for Domestic Wiring Case-1 No of Outlet (All Point,Plugs with Fitting(Lamp et 25 IR(min) value Excellent 2.00 Case-2 No of Outlet (All Point,Plugs without Fitting(Lamp 25 IR(min) value Excellent 2.00 MINIMUM Insulation Resistance Value
Transcript of (10) Calculate Insulation Resistance Value and PI Value
Minimum IR Value for Rotating Machine (AC or DC)
Machine Terminal to Terminal Voltage 0.44 KVA
IR (Min) for Machine 1.44
Minimum IR Value for Transformer
Frequency 50 HzVoltage Rating of winding under Test 440 VoltRated Capacity of Winding under Test 1.6 KVASelect Type of TransformerTank Oil Filled T.C 1Without Tank Oil filled T.CDry or Compound Fill T.CIR (Min) for Transformer 521.8
Minimum IR Value for Cable
Type of Cable 1
Type of Insulation Material 3
Outer Diameter of Conductor InsulationDiameter of Conductor
0
IR (Min) for Cable
Minimum IR Value for Domestic Wiring
Case-1 No of Outlet (All Point,Plugs with Fitting(Lamp etc)) 25IR(min) value Excellent 2.00
Case-2 No of Outlet (All Point,Plugs without Fitting(Lamp etc)) 25IR(min) value Excellent 2.00
Jignesh.Parmar www.jiguparmar.com [email protected]
MΩ
MΩ
MΩ
MΩ
MΩ
MINIMUM Insulation Resistance Value MINIMUM Insulation Resistance Value
50 Hz 25 Hz 21 1.5 12 30 203 30 20
1.5
1 Paper 26402 Varnished 24603 ThermoPlastic-Polyethylene 500004 Composite-Polyethylene 300005 Polyvinyle Chloride (60°C) 5006 Polyvinyle Chloride (75°C) 2000
50000 0
1 CoreMulticore
Name of EquipmentRated Voltage of Equipment 230 VoltRecommended Megger Size 100V DC or 250V DC
Reference Temperature (°C) 40
Date
1-Jan-10 3 42 1.15 3.45 3.451-Feb-10 2 56 3.03 6.06 6.061-Mar-10 4 55 2.83 11.31 11.311-Apr-10 5 30 0.50 2.50 2.501-May-10 5 32 0.57 2.87 2.872-May-10 2 34 0.66 1.32 1.323-May-10 2 34 0.66 1.32 1.325-May-10 5 10 0.13 0.63 0.636-May-10 0.00 0.007-May-10 0.00 0.008-May-10 0.00 0.009-May-10 0.00 0.00
10-May-10 0.00 0.0011-May-10 0.00 0.0012-May-10 0.00 0.0013-May-10 0.00 0.00
0.00 0.000.00 0.000.00 0.000.00 0.000.00 0.000.00 0.000.00 0.000.00 0.000.00 0.000.00 0.000.00 0.000.00 0.000.00 0.000.00 0.000.00 0.000.00 0.000.00 0.000.00 0.000.00 0.000.00 0.000.00 0.00
2-Jan-10 2 24 0.33 0.66 0.66
Measured IR Value (MΩ)
Temperature (°C)
Temperature Correction Factor
IR Value after Temperature Adjucment (MΩ)
1-Jan-10
2-Jan-10
3-Jan-10
4-Jan-10
5-Jan-10
6-Jan-10
7-Jan-10
8-Jan-10
9-Jan-10
10-Ja
n-10
11-Ja
n-10
12-Ja
n-10
13-Ja
n-10
14-Ja
n-10
15-Ja
n-10
16-Ja
n-10
17-Ja
n-10
18-Ja
n-10
19-Ja
n-10
20-Ja
n-10
21-Ja
n-10
22-Ja
n-10
23-Ja
n-10
24-Ja
n-10
25-Ja
n-10
26-Ja
n-10
27-Ja
n-10
28-Ja
n-10
29-Ja
n-10
30-Ja
n-10
31-Ja
n-10
1-Feb-10
2-Feb-10
3-Feb-10
4-Feb-10
5-Feb-10
6-Feb-10
7-Feb-10
8-Feb-10
9-Feb-10
10-Feb-10
11-Feb-10
12-Feb-10
13-Feb-10
14-Feb-10
15-Feb-10
16-Feb-10
17-Feb-10
18-Feb-10
19-Feb-10
20-Feb-10
21-Feb-10
22-Feb-10
23-Feb-10
24-Feb-10
25-Feb-10
26-Feb-10
27-Feb-10
28-Feb-10
1-Mar-10
2-Mar-10
3-Mar-10
4-Mar-10
5-Mar-10
6-Mar-10
7-Mar-10
8-Mar-10
9-Mar-10
10-M
ar-10
11-M
ar-10
12-M
ar-10
13-M
ar-10
14-M
ar-10
15-M
ar-10
16-M
ar-10
17-M
ar-10
18-M
ar-10
19-M
ar-10
20-M
ar-10
21-M
ar-10
22-M
ar-10
23-M
ar-10
24-M
ar-10
25-M
ar-10
26-M
ar-10
27-M
ar-10
28-M
ar-10
29-M
ar-10
30-M
ar-10
31-M
ar-10
1-Ap
r-10
2-Ap
r-10
3-Ap
r-10
4-Ap
r-10
5-Ap
r-10
6-Ap
r-10
7-Ap
r-10
8-Ap
r-10
9-Ap
r-10
10-Apr-10
11-Apr-10
12-Apr-10
13-Apr-10
14-Apr-10
15-Apr-10
16-Apr-10
17-Apr-10
18-Apr-10
19-Apr-10
20-Apr-10
21-Apr-10
22-Apr-10
23-Apr-10
24-Apr-10
25-Apr-10
26-Apr-10
27-Apr-10
28-Apr-10
29-Apr-10
30-Apr-10
1-May-10
2-May-10
3-May-10
4-May-10
5-May-10
6-May-10
7-May-10
8-May-10
9-May-10
10-M
ay-10
11-M
ay-10
12-M
ay-10
13-M
ay-10
0.00
2.00
4.00
6.00
8.00
10.00
12.00IR Value (MΩ)
Insulation Resistance Value measurementInsulation Resistance Value measurement
1-Jan-10 2 30 0.50 1.00 1.00
1-Jan-101-Feb-101-Mar-101-Apr-10
1-May-102-May-103-May-105-May-106-May-107-May-108-May-109-May-10
10-May-1011-May-1012-May-1013-May-10
2-Jan-10
Jignesh.Parmar www.jiguparmar.com [email protected]
1-Jan-10
2-Jan-10
3-Jan-10
4-Jan-10
5-Jan-10
6-Jan-10
7-Jan-10
8-Jan-10
9-Jan-10
10-Ja
n-10
11-Ja
n-10
12-Ja
n-10
13-Ja
n-10
14-Ja
n-10
15-Ja
n-10
16-Ja
n-10
17-Ja
n-10
18-Ja
n-10
19-Ja
n-10
20-Ja
n-10
21-Ja
n-10
22-Ja
n-10
23-Ja
n-10
24-Ja
n-10
25-Ja
n-10
26-Ja
n-10
27-Ja
n-10
28-Ja
n-10
29-Ja
n-10
30-Ja
n-10
31-Ja
n-10
1-Feb-10
2-Feb-10
3-Feb-10
4-Feb-10
5-Feb-10
6-Feb-10
7-Feb-10
8-Feb-10
9-Feb-10
10-Feb-10
11-Feb-10
12-Feb-10
13-Feb-10
14-Feb-10
15-Feb-10
16-Feb-10
17-Feb-10
18-Feb-10
19-Feb-10
20-Feb-10
21-Feb-10
22-Feb-10
23-Feb-10
24-Feb-10
25-Feb-10
26-Feb-10
27-Feb-10
28-Feb-10
1-Mar-10
2-Mar-10
3-Mar-10
4-Mar-10
5-Mar-10
6-Mar-10
7-Mar-10
8-Mar-10
9-Mar-10
10-M
ar-10
11-M
ar-10
12-M
ar-10
13-M
ar-10
14-M
ar-10
15-M
ar-10
16-M
ar-10
17-M
ar-10
18-M
ar-10
19-M
ar-10
20-M
ar-10
21-M
ar-10
22-M
ar-10
23-M
ar-10
24-M
ar-10
25-M
ar-10
26-M
ar-10
27-M
ar-10
28-M
ar-10
29-M
ar-10
30-M
ar-10
31-M
ar-10
1-Ap
r-10
2-Ap
r-10
3-Ap
r-10
4-Ap
r-10
5-Ap
r-10
6-Ap
r-10
7-Ap
r-10
8-Ap
r-10
9-Ap
r-10
10-Apr-10
11-Apr-10
12-Apr-10
13-Apr-10
14-Apr-10
15-Apr-10
16-Apr-10
17-Apr-10
18-Apr-10
19-Apr-10
20-Apr-10
21-Apr-10
22-Apr-10
23-Apr-10
24-Apr-10
25-Apr-10
26-Apr-10
27-Apr-10
28-Apr-10
29-Apr-10
30-Apr-10
1-May-10
2-May-10
3-May-10
4-May-10
5-May-10
6-May-10
7-May-10
8-May-10
9-May-10
10-M
ay-10
11-M
ay-10
12-M
ay-10
13-M
ay-10
0.00
2.00
4.00
6.00
8.00
10.00
12.00IR Value (MΩ)
1-Jan-10
100 100V DC or 250V DC
200 100V DC or 250V DC300 100V DC or 250V DC
400 500V DC or 1000V DC500 500V DC or 1000V DC600 500V DC or 1000V DC700 500V DC or 1000V DC800 500V DC or 1000V DC900 500V DC or 1000V DC
1000 500V DC or 1000V DC1100 500V DC or 1000V DC1200 500V DC or 1000V DC1300 500V DC or 1000V DC1400 500V DC or 1000V DC1500 500V DC or 1000V DC1600 500V DC or 1000V DC1700 500V DC or 1000V DC1800 500V DC or 1000V DC1900 500V DC or 1000V DC2000 500V DC or 1000V DC2100 500V DC or 1000V DC2200 500V DC or 1000V DC2300 500V DC or 1000V DC2400 500V DC or 1000V DC2500 1000V DC or 2500V DC2600 1000V DC or 2500V DC2700 1000V DC or 2500V DC2800 1000V DC or 2500V DC2900 1000V DC or 2500V DC3000 1000V DC or 2500V DC3100 1000V DC or 2500V DC3200 1000V DC or 2500V DC3300 1000V DC or 2500V DC3400 1000V DC or 2500V DC3500 1000V DC or 2500V DC3600 1000V DC or 2500V DC3700 1000V DC or 2500V DC3800 1000V DC or 2500V DC3900 1000V DC or 2500V DC4000 1000V DC or 2500V DC4100 1000V DC or 2500V DC4200 1000V DC or 2500V DC
4300 1000V DC or 2500V DC4400 1000V DC or 2500V DC4500 1000V DC or 2500V DC4600 1000V DC or 2500V DC4700 1000V DC or 2500V DC4800 1000V DC or 2500V DC4900 1000V DC or 2500V DC5000 2500V DC or 5000V DC5100 2500V DC or 5000V DC6000 2500V DC or 5000V DC7000 2500V DC or 5000V DC8000 2500V DC or 5000V DC9000 2500V DC or 5000V DC
10000 2500V DC or 5000V DC11000 2500V DC or 5000V DC12000 2500V DC or 5000V DC13000 50000V DC or 10000V DC
Name of Equipment adwaRated Voltage of Equipment 440Recommended Megger 500V DC or 1000V DCInsulation Class
Reference Temperature (°C) 40
Date
1-Jan-10 2 1 42 1.15 2.001-Feb-10 4 2 56 3.03 2.001-Mar-10 5 1 55 2.83 5.001-Apr-10 3 1 30 0.50 3.001-May-10 2 1 32 0.57 2.002-May-10 4 1 34 0.66 4.003-May-10 2 2 34 0.66 1.00
0.00 0.000.00 0.000.00 0.000.00 0.000.00 0.000.00 0.000.00 0.000.00 0.000.00 0.000.00 0.000.00 0.000.00 0.000.00 0.000.00 0.000.00 0.000.00 0.000.00 0.000.00 0.000.00 0.000.00 0.000.00 0.000.00 0.000.00 0.000.00 0.000.00 0.000.00 0.000.00 0.000.00 0.000.00 0.000.00 0.000.00 0.00
1-Jan-10 2 3 23 0.31 0.67
Measured IR Value (MΩ)
(for 10 Minitue)
Measured IR Value (MΩ)
(for 1 Minitue)
Temperature (°C)
Temperature Correction Factor
Polarization Index Number after Temperature Adjucment
POLARIZATION INDEX Value measurementPOLARIZATION INDEX Value measurement
Class A Class B Class C Class F Class H
Volt
1
Questionable 2.00 1-Jan-10Questionable 2.00 1-Feb-10
Excellent 5.00 1-Mar-10OK 3.00 1-Apr-10
Questionable 2.00 1-May-10OK 4.00 2-May-10
Poor 1.00 3-May-10
Poor 0.67 1-Jan-10
Jignesh.Parmar www.jiguparmar.com [email protected]
Insulation Condition
1-Jan-102-Jan-103-Jan-104-Jan-105-Jan-106-Jan-107-Jan-108-Jan-109-Jan-1010-Jan-1011-Jan-1012-Jan-1013-Jan-1014-Jan-1015-Jan-1016-Jan-1017-Jan-1018-Jan-1019-Jan-1020-Jan-1021-Jan-1022-Jan-1023-Jan-1024-Jan-1025-Jan-1026-Jan-1027-Jan-1028-Jan-1029-Jan-1030-Jan-1031-Jan-101-Feb-102-Feb-103-Feb-104-Feb-105-Feb-106-Feb-107-Feb-108-Feb-109-Feb-1010-Feb-1011-Feb-1012-Feb-1013-Feb-1014-Feb-1015-Feb-1016-Feb-1017-Feb-1018-Feb-1019-Feb-1020-Feb-1021-Feb-1022-Feb-1023-Feb-1024-Feb-1025-Feb-1026-Feb-1027-Feb-1028-Feb-101-Mar-102-Mar-103-Mar-104-Mar-105-Mar-106-Mar-107-Mar-108-Mar-109-Mar-1010-Mar-1011-Mar-1012-Mar-1013-Mar-1014-Mar-1015-Mar-1016-Mar-1017-Mar-1018-Mar-1019-Mar-1020-Mar-1021-Mar-1022-Mar-1023-Mar-1024-Mar-1025-Mar-1026-Mar-1027-Mar-1028-Mar-1029-Mar-1030-Mar-1031-Mar-101-Apr-102-Apr-103-Apr-104-Apr-105-Apr-106-Apr-107-Apr-108-Apr-109-Apr-1010-Apr-1011-Apr-1012-Apr-1013-Apr-1014-Apr-1015-Apr-1016-Apr-1017-Apr-1018-Apr-1019-Apr-1020-Apr-1021-Apr-1022-Apr-1023-Apr-1024-Apr-1025-Apr-1026-Apr-1027-Apr-1028-Apr-1029-Apr-1030-Apr-101-May-102-May-103-May-100.00
1.00
2.00
3.00
4.00
5.00
6.00PI Value
100200300400500600700800900
10001100120013001400150016001700180019002000210022002300240025002600270028002900300031003200330034003500360037003800390040004100
1-Jan-102-Jan-103-Jan-104-Jan-105-Jan-106-Jan-107-Jan-108-Jan-109-Jan-1010-Jan-1011-Jan-1012-Jan-1013-Jan-1014-Jan-1015-Jan-1016-Jan-1017-Jan-1018-Jan-1019-Jan-1020-Jan-1021-Jan-1022-Jan-1023-Jan-1024-Jan-1025-Jan-1026-Jan-1027-Jan-1028-Jan-1029-Jan-1030-Jan-1031-Jan-101-Feb-102-Feb-103-Feb-104-Feb-105-Feb-106-Feb-107-Feb-108-Feb-109-Feb-1010-Feb-1011-Feb-1012-Feb-1013-Feb-1014-Feb-1015-Feb-1016-Feb-1017-Feb-1018-Feb-1019-Feb-1020-Feb-1021-Feb-1022-Feb-1023-Feb-1024-Feb-1025-Feb-1026-Feb-1027-Feb-1028-Feb-101-Mar-102-Mar-103-Mar-104-Mar-105-Mar-106-Mar-107-Mar-108-Mar-109-Mar-1010-Mar-1011-Mar-1012-Mar-1013-Mar-1014-Mar-1015-Mar-1016-Mar-1017-Mar-1018-Mar-1019-Mar-1020-Mar-1021-Mar-1022-Mar-1023-Mar-1024-Mar-1025-Mar-1026-Mar-1027-Mar-1028-Mar-1029-Mar-1030-Mar-1031-Mar-101-Apr-102-Apr-103-Apr-104-Apr-105-Apr-106-Apr-107-Apr-108-Apr-109-Apr-1010-Apr-1011-Apr-1012-Apr-1013-Apr-1014-Apr-1015-Apr-1016-Apr-1017-Apr-1018-Apr-1019-Apr-1020-Apr-1021-Apr-1022-Apr-1023-Apr-1024-Apr-1025-Apr-1026-Apr-1027-Apr-1028-Apr-1029-Apr-1030-Apr-101-May-102-May-103-May-100.00
1.00
2.00
3.00
4.00
5.00
6.00PI Value
42004300440045004600470048004900500051006000700080009000
10000110001200013000
100V DC or 250V DC 100V DC or 250V DC 100V DC or 250V DC500V DC or 1000V DC500V DC or 1000V DC500V DC or 1000V DC500V DC or 1000V DC500V DC or 1000V DC500V DC or 1000V DC500V DC or 1000V DC500V DC or 1000V DC500V DC or 1000V DC500V DC or 1000V DC500V DC or 1000V DC500V DC or 1000V DC500V DC or 1000V DC500V DC or 1000V DC500V DC or 1000V DC500V DC or 1000V DC500V DC or 1000V DC500V DC or 1000V DC500V DC or 1000V DC500V DC or 1000V DC500V DC or 1000V DC1000V DC or 2500V DC1000V DC or 2500V DC1000V DC or 2500V DC1000V DC or 2500V DC1000V DC or 2500V DC1000V DC or 2500V DC1000V DC or 2500V DC1000V DC or 2500V DC1000V DC or 2500V DC1000V DC or 2500V DC1000V DC or 2500V DC1000V DC or 2500V DC1000V DC or 2500V DC1000V DC or 2500V DC1000V DC or 2500V DC1000V DC or 2500V DC1000V DC or 2500V DC
1000V DC or 2500V DC1000V DC or 2500V DC1000V DC or 2500V DC1000V DC or 2500V DC1000V DC or 2500V DC1000V DC or 2500V DC1000V DC or 2500V DC1000V DC or 2500V DC2500V DC or 5000V DC2500V DC or 5000V DC2500V DC or 5000V DC2500V DC or 5000V DC2500V DC or 5000V DC2500V DC or 5000V DC2500V DC or 5000V DC2500V DC or 5000V DC2500V DC or 5000V DC50000V DC or 10000V DC
Date Remarks
1 1-Jan-10 1 02 2 03 5 04 10 05 15 06 25 07 50 0
Date Remarks
1 1 02 2 03 5 04 10 05 15 06 25 07 50 0
Date Remarks
1 1 02 2 03 5 04 10 05 15 06 25 07 50 0
Date Remarks
1 1 02 2 03 5 04 10 05 15 06 25 07 50 0
Date Remarks
1 1 02 2 03 5 0
Direction-I
Electrode Spacing (S)
(Meter)
Megger Rading in Ohms
Earth Resistivity Ohm-Meter
Direction-II
Electrode Spacing (S)
(Meter)
Megger Rading in Ohms
Earth Resistivity Ohm/Meter
Direction-III
Electrode Spacing (S)
(Meter)
Megger Rading in Ohms
Earth Resistivity Ohm/Meter
Direction-IV
Electrode Spacing (S)
(Meter)
Megger Rading in Ohms
Earth Resistivity Ohm/Meter
Direction-V
Electrode Spacing (S)
(Meter)
Megger Rading in Ohms
Earth Resistivity Ohm/Meter
Earth Resistivity Value MeasurementEarth Resistivity Value Measurement
4 10 05 15 06 25 07 50 0
Date Remarks
1 1 02 2 03 5 04 10 05 15 06 25 07 50 0
Direction-VI
Electrode Spacing (S)
(Meter)
Megger Rading in Ohms
Earth Resistivity Ohm/Meter
The Earth Resistance Value
Power StationEarth Tester/Megger (4 Terminals) EHT SubStation
66KV SuStationP1 P2 D.P Structure
Tower Foot Resistance
C1 C2
30 to 50 Cm
S S S
Location of Earth Resistivity Measurement
1
4 5 6 2
3
Earth Tester/Megger (3 Terminals)P
E C
Jignesh.Parmar www.jiguparmar.com
75 Feet 75 Feet
The Earth Resistance Value
Power StationEHT SubStation66KV SuStationD.P Structure
Tower Foot Resistance
30 to 50 Cm
< 0.5Ω< 1.0Ω< 2.0Ω<5.0Ω
<10.0Ω
![How do you calculate 'value' in your diet? [INFOGRAPHIC]](https://static.fdocuments.net/doc/165x107/55cd0f65bb61eb39288b4733/how-do-you-calculate-value-in-your-diet-infographic.jpg)
