remote control equipment - Indian Railways Institute of Electrical ...

Fault Gases
TABLE - III
GAS LEVELS FOR DIFFERENT FAULT CONDITIONS
(All concentrations are In PPM)
Hydrogen
. H2
Methane Ethane Ethylene Acetylene
CH4 C2H6 C2H4
61
C2H2
Carbon
dioxide CO
Arcing 500-1000 20-130 10-30 10-30 40-100 3000-4000
Partial
Discharge
500-1000 20-130 10-30 10-30 10-15 3000-4000
Hot Spot 20-150 10-30 10-30 150-200 10-15 3000-4000
Gradual
Overheating
20-150 10-30 150-200 10-30 10-30 3000-4000
TABLE -IV
GAS COMPOSITION BY VOLUME (%) WITH REFERENCE TO VOLUME
OF OIL DUE TO ARCING FAULTS
Insulation H2 CO C02 CH4 C2H6 C2H4 C2H2 02 H2
Oil only
Oil/Kraft paper
Oil/Press board
Laminate
Oil, Alkyl paint
Oil/Polyure-thane
enamel
Oil/P.V. A enamel
Oil/Epoxy glass
clothes.
Oil/lsophthalate
Cotton tape.
60 0.1
52 14
48 27
55 20
60 1
61 5
57 2
55 11
0.1
0.2
0.4
0.2
0.1
0.1
0.1
4
3.3 0.05
3.8 0.05
5 -
4 -
9 -
6 -
14 -
8 -
2.1
8
5
5
11
14
10
8
2.1
12
6
8
10
5
8
5
2.4 6.3
3 6.7
2 6.2
2.4 7
2 6
2.5 6.5
2.5 6.5
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