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Target values of insulating oils from capacitor bushings
Measured
value
[units]
|
Before
filling
|
After
filling
|
In operation
|
|
110 kV
|
220 kV
|
400 kV
|
|
Breakdown voltage [kV/2.5mm]
|
>65
|
>65
|
>45
|
>45
|
>45
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Neutralization value [mgKOH/g]
|
<0.01
|
<0.01
|
<0.25
|
<0.25
|
<0.25
|
Water content
[g/t]
|
<10
|
<10
|
<25
|
<25
|
<25
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Dissipation factor at 90oC[.10-2]
|
<0.5
|
<0.7
|
<10
|
<7
|
<5
|
Gas volume
[%]
|
<1
|
<1
|
<5
|
<5
|
<5
|
Hydrogen
[ppm]
|
-
|
-
|
-
|
<1000
|
<1000
|
C1 to C2
[ppm]
|
-
|
-
|
-
|
<100
|
<100
|
Acetylen
[ppm]
|
-
|
-
|
-
|
<10
|
<10
|
Note: Withdrawal from bushings for “After filling” test is made up to 8 hours after filling the oil in the machine.
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