Earth-Leakage Protection on MicroLogic 7.0 A Trip Unit
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The earth-leakage protection function primarily protects people against indirect contact because an earth-leakage current can provoke an increase in the potential of the exposed conductive parts.
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The earth-leakage pickup value IΔn is displayed directly in amperes and the time delay follows a constant-time curve.
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An external rectangular sensor is required for this function.
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This function is inoperative if the long-time rating plug is not installed.
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As a type-AC, the circuit breaker is protected against nuisance tripping.
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As a type-A, the circuit breaker provides DC-component withstand up to 10 A.
Earth-Leakage Pickup Value IΔn
|
IΔn pickup (A) (accuracy 0 to -20 %) |
0.5 |
1 |
2 |
3 |
5 |
7 |
10 |
20 |
30 |
Time Delay Δt
|
Δt time delay settings (ms) (Maximum resettable time) |
60 |
140 |
230 |
350 |
800 |
|
Δt maximum break time (ms) |
140 |
200 |
320 |
500 |
1000 |