GE SF6, Instruction Manual

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Maintenance
Electrical wear limits
GE Information
08- 2016 L51- 052EN/05
1/2
Electrical wear limits
Estimation
Electrical wear can be determined by means of the curve below. This curve corres-
ponds with the formula:
Σ
NI
2
= 20,000 kA
2
(*)
N = number of interruptions on value I.
Example: it is possible to perform 50 interruptions on a current of 20 kA.
(*) Normal guarantee. In certain special operation conditions, other values may be
guaranteed.
Diagram
10 20 30 50 100 500 1000 3000
2
10
20
50
I (kA)
Number of interruptions