InsulationResistance22.8.12

7/28/2019 InsulationResistance22.8.12

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Machine Terminal to Terminal Voltage 0.44 KVA

IR (Min) for Machine 1.44 M

Frequency 50 Hz

Voltage Rating of winding under Test 440 Volt

Rated Capacity of Winding under Test 1.6 KVA

Select Type of Transformer

Tank Oil Filled T.C 1Without Tank Oil filled T.C

Dry or Compound Fill T.C

IR (Min) for Transformer 521.8 M

Type of Cable 1

Type of Insulation Material 3

Outer Diameter of Conductor Insulation

Diameter of Conductor

0

IR (Min) for Cable M

Case-1 No of Outlet (All Point,Plugs with Fitting(Lamp etc)) 25

IR(min) value Excellent 2.00 M

Case-2 No of Outlet (All Point,Plugs without Fitting(Lamp etc)) 25

IR(min) value Excellent 2.00 M

J

www.elect

jigup

Minimum IR Value for Rotating Machine (AC or DC)

Minimum IR Value for Transformer

Minimum IR Value for Cable

Minimum IR Value for Domestic Wiring
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ignesh.Parmar,

ricalnotes.wordpress.com

[email protected]


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50 Hz 25 Hz

1 1.5 1

2 30 20

3 30 20

1.5

1 Paper

2 Varnished

3 ThermoPlastic-Polyethylene

4 Composite-Polyethylene

5 Polyvinyle Chloride (60C)

6 Polyvinyle Chloride (75C)

50000


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2

2640 1 Core

2460 Multicore

50000

30000

500

2000

0


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Name of Equipment

Rated Voltage of Equipment Volt

Recommended Megger Size

Reference Temperature (C)

DateMeasured IR

Value (M)

Temperature

(C)

Temperatur

e

Correction

Factor

IR Value after

Temperature

Adjucment (M)

1-Jan-10 3 42 1.15 3.45 3.45

1-Feb-10 2 56 3.03 6.06 6.06

1-Mar-10 4 55 2.83 11.31 11.31

1-Apr-10 5 30 0.50 2.50 2.50

1-May-10 5 32 0.57 2.87 2.87

2-May-10 2 34 0.66 1.32 1.323-May-10 2 34 0.66 1.32 1.32

5-May-10 5 10 0.13 0.63 0.63

6-May-10 0.00 0.00

7-May-10 0.00 0.00

8-May-10 0.00 0.00

9-May-10 0.00 0.00

10-May-10 0.00 0.00

11-May-10 0.00 0.00

12-May-10 0.00 0.00

13-May-10 0.00 0.00

0.00 0.00

0.00 0.000.00 0.00

0.00 0.00

0.00 0.00

0.00 0.00

0.00 0.00

0.00 0.00

0.00 0.00

0.00 0.00

0.00 0.00

0.00 0.00

0.00 0.00

0.00 0.00

0.00 0.000.00 0.00

0.00 0.00

0.00 0.00

0.00 0.00

0.00 0.00

0.00 0.00

2-Jan-10 2 24 0.33 0.66 0.66

1-Jan-10 2 30 0.50 1.00 1.00

230

100V DC or 250V DC

40

0.00

2.00

4.00

6.00

8.00

10.00

12.00


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1-Jan-10

1-Feb-10

1-Mar-10

1-Apr-10

1-May-10

2-May-103-May-10

5-May-10

6-May-10

7-May-10

8-May-10

9-May-10

10-May-10

11-May-10

12-May-10

13-May-10

2-Jan-10

1-Jan-10

Jignesh.Parmar,

www.electricalnotes.wordpress.com,

[email protected]

1-Jan

-10

1-Feb

-10

1-Mar

-10

1-Apr

-10

1-May

-10

2-May

-10

3-May

-10

5-May

-10

6-May

-10

7-May

-10

8-May

-10

9-May

-10

10-May

-10

11-May

-10

12-May

-10

13-May

-10

2-Jan

-10

1-Jan

-10

IR Value (M)
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100 100V DC or 250V DC

200 100V DC or 250V DC

300 100V DC or 250V DC

400 500V DC or 1000V DC

500 500V DC or 1000V DC

600 500V DC or 1000V DC

700 500V DC or 1000V DC

800 500V DC or 1000V DC

900 500V DC or 1000V DC

1000 500V DC or 1000V DC1100 500V DC or 1000V DC

1200 500V DC or 1000V DC

1300 500V DC or 1000V DC

1400 500V DC or 1000V DC

1500 500V DC or 1000V DC

1600 500V DC or 1000V DC

1700 500V DC or 1000V DC

1800 500V DC or 1000V DC

1900 500V DC or 1000V DC

2000 500V DC or 1000V DC

2100 500V DC or 1000V DC


2400 500V DC or 1000V DC

2500 1000V DC or 2500V DC

2600 1000V DC or 2500V DC

2700 1000V DC or 2500V DC

2800 1000V DC or 2500V DC

2900 1000V DC or 2500V DC

3000 1000V DC or 2500V DC

3100 1000V DC or 2500V DC

3200 1000V DC or 2500V DC

3300 1000V DC or 2500V DC

3400 1000V DC or 2500V DC


3700 1000V DC or 2500V DC

3800 1000V DC or 2500V DC

3900 1000V DC or 2500V DC

4000 1000V DC or 2500V DC

4100 1000V DC or 2500V DC

4200 1000V DC or 2500V DC

4300 1000V DC or 2500V DC

4400 1000V DC or 2500V DC


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4500 1000V DC or 2500V DC

4600 1000V DC or 2500V DC

4700 1000V DC or 2500V DC

4800 1000V DC or 2500V DC

4900 1000V DC or 2500V DC

5000 2500V DC or 5000V DC

5100 2500V DC or 5000V DC

6000 2500V DC or 5000V DC

7000 2500V DC or 5000V DC

8000 2500V DC or 5000V DC

9000 2500V DC or 5000V DC

10000 2500V DC or 5000V DC

11000 2500V DC or 5000V DC

12000 2500V DC or 5000V DC

13000 50000V DC or 10000V DC


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Insulation ClassReference Temperature (C) 40

Date

Measured IR

Value (M)

(for 10 Minitue)

Measured IR

Value (M)

(for 1

Minitue)

Temperature

(C)

Temperatur

e

Correction

Factor

Polarization Index

Number after

Temperature

Adjucment

1-Jan-10 2 1 42 1.15 2.00

1-Feb-10 4 2 56 3.03 2.00

1-Mar-10 5 1 55 2.83 5.00

1-Apr-10 3 1 30 0.50 3.00

1-May-10 2 1 32 0.57 2.00

2-May-10 4 1 34 0.66 4.00

3-May-10 2 2 34 0.66 1.00

5-Jun-11 3 4 42 1.15 0.75

0.00 0.00

0.00 0.00

0.00 0.00

0.00 0.00

0.00 0.00

0.00 0.00

0.00 0.00

0.00 0.00

0.00 0.00

0.00 0.00

0.00 0.00

0.00 0.000.00 0.00

0.00 0.00

0.00 0.00

0.00 0.00

0.00 0.00

0.00 0.00

0.00 0.00

0.00 0.00

0.00 0.00

0.00 0.00

0.00 0.00

0.00 0.00

0.00 0.00

0.00 0.00

0.00 0.00

0.00 0.00

0.00 0.00

0.00 0.00

1-Jan-10 2 3 23 0.31 0.67

Rated Voltage of Equipment 440

500V DC or 1000V DC

adwaName of Equipment

Recommended MeggerClass A Class B Class C Class F Class H


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Volt

Insulation

Condition1

Questionable 2.00 1-Jan-10

Questionable 2.00 1-Feb-10

Excellent 5.00 1-Mar-10

OK 3.00 1-Apr-10

Questionable 2.00 1-May-10

OK 4.00 2-May-10

Poor 1.00 3-May-10

Poor 0.75 5-Jun-11

Poor 0.67 1-Jan-10

Jignesh.Parmar,

www.electricalnotes.wordpress.com

[email protected]

0.00

1.00

2.00

3.00

4.00

5.00

6.00

PI Value
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100

200

300

400

500

600

700

800

900

1000

1100

1200

1300

1400

1500

1600

1700

1800

19002000

2100

2200

2300

2400

2500

2600

2700

2800

2900

3000

3100

3200

3300

3400

3500

3600

3700

3800

3900

4000

4100

4200


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4300

4400

4500

4600

4700

4800

4900

5000

51006000

7000

8000

9000

10000

11000

12000

13000


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100V DC or 250V DC

100V DC or 250V DC

100V DC or 250V DC

500V DC or 1000V DC

500V DC or 1000V DC

500V DC or 1000V DC

500V DC or 1000V DC

500V DC or 1000V DC

500V DC or 1000V DC

500V DC or 1000V DC

500V DC or 1000V DC

500V DC or 1000V DC

500V DC or 1000V DC

500V DC or 1000V DC

500V DC or 1000V DC

500V DC or 1000V DC

500V DC or 1000V DC

500V DC or 1000V DC

500V DC or 1000V DC500V DC or 1000V DC

500V DC or 1000V DC

500V DC or 1000V DC

500V DC or 1000V DC

500V DC or 1000V DC

1000V DC or 2500V DC



















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2500V DC or 5000V DC2500V DC or 5000V DC







50000V DC or 10000V DC


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Direction-

I

Date

Electrode

Spacing (S)

(Meter)

Megger Rading in

Ohms

Earth Resistivity

Ohm-Meter

Remarks

1 1-Jan-10 1 0

2 2 0

3 5 0

4 10 0

5 15 0

6 25 0

7 50 0

Direction-

IIDate

Electrode

Spacing (S)

(Meter)

Megger Rading in

Ohms

Earth Resistivity

Ohm/MeterRemarks

1 1 0

2 2 03 5 0

4 10 0

5 15 0

6 25 0

7 50 0

Direction-

IIIDate

Electrode

Spacing (S)

(Meter)

Megger Rading in

Ohms

Earth Resistivity

Ohm/MeterRemarks

1 1 0

2 2 0

3 5 0

4 10 0

5 15 06 25 0

7 50 0

Direction-

IVDate

Electrode

Spacing (S)

(Meter)

Megger Rading in

Ohms

Earth Resistivity

Ohm/MeterRemarks

1 1 0

2 2 0

3 5 0

4 10 0

5 15 0

6 25 0

7 50 0

Direction-

VDate

Electrode

Spacing (S)

(Meter)

Megger Rading in

Ohms

Earth Resistivity

Ohm/MeterRemarks

1 1 0

2 2 0

3 5 0

4 10 0

5 15 0

6 25 0


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7 50 0

Direction-

VIDate

Electrode

Spacing (S)

(Meter)

Megger Rading in

Ohms

Earth Resistivity

Ohm/MeterRemarks

1 1 0

2 2 0

3 5 0

4 10 05 15 0

6 25 0

7 50 0


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Earth Tester/Megger (4 Terminals)

P1 P2

C1 C2

30 to 50

S S

4 6 2

Earth Tester/Megger (3 Terminals)

P

E C

75 Feet

D.

5

Jignesh.Parmar,

www.electricalnotes.wordpress.com,

[email protected]

The Ea

S

EH

66K

1

Tower

Location of Earth Resistivity Measurement

Po

75 Feet

3
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< 0.5< 1.0

< 2.0


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InsulationResistance22.8.12

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