Instantaneous Protection
-
The instantaneous-protection function helps to protect the distribution system against solid short-circuits. Contrary to the short-time protection function, the time delay for instantaneous protection is not adjustable.
The tripping order is sent to the circuit breaker as soon as current exceeds the set value, with a fixed time delay of 20 milliseconds.
-
This function carries out true rms measurements.
Instantaneous Pickup
|
MicroLogic 2.0 A/E |
Pickup (accuracy ± 10 %) |
Isd = Ir x ... |
1.5 |
2 |
2.5 |
3 |
4 |
5 |
6 |
8 |
10 |
|
MicroLogic 5.0 A/E, 6.0 A/E, 7.0 A |
Pickup (accuracy ± 10 %) |
Ii = In x ... |
2 |
3 |
4 |
6 |
8 |
10 |
12 |
15 |
OFF |