(10) Insulation Resistance Javid Sodagar

8/18/2019 (10) Insulation Resistance Javid Sodagar

1/37

Minimum IR Value for Rotating Machine

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 inding under Test !."

#elect Type of Transformer Tan$ %il Filled T.C !

ithout Tan$ %il filled T.C

&ry or Compound Fill T.C

IR (Min) for Transformer 521.8

MINIMUM Insulation Resistance Value


2/37


3/37

Minimum IR Value for Cable

Type of Ca'le

(V) Type of *nsulation Material

&iameter of Conductor

Thic$ness of +ac$et *nsulation

Thic$ness of Conductor *nsulation

IR Value (Min) for Cable

Minimum IR Value for Domestic W

,- !/ o of %utlet )ll 1oint21lugs with Fitting3amp etc//

Volt IR(min) value Excellent

(V) / o of %utlet )ll 1oint21lugs without Fitting3amp etc//

IR(min) value Excellent

Jinesh.!armar"#iu$armar%&ahoo.com" '

MΩ

MΩ

http://www.electricalnotes.wordpress.com/http://www.electricalnotes.wordpress.com/


4/37


5/37

Multicore

Varnished

5 mm0 mm

!0 mm "4

! mm

1242.*

iring

40

1.25

5

2.00

'.elecricalnoes.'or$ress.c

MΩ

MΩ

MΩ



6/37


7/37

50 ,-

! !.5

0

0

!.5

!

4

5

"


8/37


9/37

5 ,-

!

0

0

1aper "40 ! Core

Varnished 4"0 Multicore

Thermo1lastic61olyethylene 50000Composite61olyethylene 0000

1oly7inyle Chloride "08C/ 500

1oly7inyle Chloride 958C/ 000

4"0 "4


10/37


11/37

ame of :quipment

Rated Voltage of :quipment 0

Recommended Megger #i-e !00V &C or

Reference Temperature 8C/ 40

+ae Tem$eraure (,C)

!6+an6!0 4 1.15

!6Fe'6!0 5" -.-

!6Mar6!0 4 55 2.8-

!6)pr6!0 5 0 .5

!6May6!0 5 .5*

6May6!0 4 .//

6May6!0 4 .//

56May6!0 5 !0 .1-

"6May6!0 .

96May6!0 .

;6May6!0 .


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13/37

Volt

0V &C

-.45 .45 !6+an6!0

/./ ".0" !6Fe'6!0

11.-1 !!.! !6Mar6!0

2.5 .50 !6)pr6!0

2.8* .;9 !6May6!0

1.-2 !. 6May6!0

1.-2 !. 6May6!0

./- 0." 56May6!0

. "6May6!0

. 96May6!0

. ;6May6!0

.


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15/37

&ahoo.com" '''.elecricalnoes.'or$ress.com

1 2 - M a y - 1 0

1 - J a n - 1 0

Value (MΩ)



16/37


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18/37


19/37

!00 !00V &C or 50V &C

00 !00V &C or 50V &C

400 500V &C or !000V &C

500 500V &C or !000V &C

"00 500V &C or !000V &C

900 500V &C or !000V &C

;00 500V &C or !000V &C


20/37

4900 !000V &C or 500V &C

4;00 !000V &C or 500V &C

4


21/37

ame of :quipment adwa

Rated Voltage of :quipment 440

Recommended Megger 500V &C or !000

*nsulation Class

Reference Temperature 8C/ 40

+ae Tem$eraure (,C)

!6+an6!0 ! 4 1.15

!6Fe'6!0 4 5" -.-

!6Mar6!0 5 ! 55 2.8-

!6)pr6!0 ! 0 .5

!6May6!0 ! .5*

6May6!0 4 ! 4 .//6May6!0 4 .//

56+un6!! 4 4 1.15

.

.

.

.

.

.

.

.

.

..

.

.

.

.

.

.

.

.

.

.

..

.

.

.

.

.

.

.

!6+an6!0 .-1

Jinesh.!a

Measure IR Value(M0) (for 1

Miniue)

Measure IR Value(M0) (for 1 Miniue)

Tem$eraureCorrecion acor

!3RITI36 I6+7 Value measuremen

Class A Class B Class C Class F



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23/37

Volt

V &C

Insulaion Coniion !

2.00 9uesionable .00 !6+an6!0

2.00 9uesionable .00 !6Fe'6!0

5.00 7:cellen 5.00 !6Mar6!0

3.00 3; .00 !6)pr6!0

2.00 9uesionable .00 !6May6!0

4.00 3; 4.00 6May6!01. !oor !.00 6May6!0

.*5 !oor 0.95 56+un6!!

.

0.00

0.00

0.00

.

0.00

.

.

.

..

.

.

.

.

.

.

.

.

.

.

..

.

.

.

.

.

.

.

./* !oor 0."9 !6+an6!0

mar '''.elecricalnoes.'or$ress.com

!olari


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25/37

1 - J a n - 1 0

on Index Value


26/37


27/37

!00 !00V &C or 50V &C

00 !00V &C or 50V &C

00 !00V &C or 50V &C

400 500V &C or !000V &C

500 500V &C or !000V &C"00 500V &C or !000V &C

900 500V &C or !000V &C

;00 500V &C or !000V &C


28/37


29/37

+irecion=I +ae

! !6+an6!0 !

5

4 !0

5 !5

" 5

9 50

+irecion=2 +ae

! !

5

4 !0

5 !5

" 5

9 50

+irecion=- +ae

! !

5

4 !0

5 !5

" 5

9 50

+irecion=4 +ae

! !

5

4 !0

5 !5

" 5

9 50

+irecion=5 +ae

! !

5

7lecroe>$acin (>)(Meer)

Meer Rain in3hms

7arh Resisivi&3hm=Meer

7lecroe

>$acin (>)(Meer)

Meer Rain in3hms

7arh Resisivi&3hm?Meer

7lecroe>$acin (>)

(Meer)

Meer Rain in

3hms

7arh Resisivi&

3hm?Meer

7lecroe>$acin (>)

(Meer)

Meer Rain in3hms


7lecroe>$acin (>)

(Meer)

Meer Rain in3hms


7arh Resisivi& Value Measuremen


30/37

4 !0

5 !5

" 5

9 50

+irecion=/ +ae

! !

5

4 !0

5 !5

" 5

9 50

7lecroe>$acin (>)

(Meer)

Meer Rain in3hms



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32/37

7arh

1!

Remar@s

C!

Remar@s

#

ocaion of 7ar

&ir

Remar@s

&irection= 4 &ire

&ir

Remar@s

7arh

:

Remar@s

Jinesh.!armar" '''.elecricalnoes.



33/37

95

Remar@s


34/37


35/37


36/37

Feet 95 Feet


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(10) Insulation Resistance Javid Sodagar

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