User Manual

Description
2.3 Protection system
3WA Air Circuit Breakers
62 Equipment Manual, 05/2021, 92310000002-03
2.3.5.10 Reverse power protection RP
The reverse power protection trips the circuit breaker if the power flow through the device
reverses against the direction of flow defined as normal and exceeds the set delay time. The
setting is referred to the rated active power P
n as a percentage. This is dependent on the
rated current I
n of the circuit breaker and the rated voltage Un parameterized on the
electronic trip unit.
For reverse power protection, the current and voltage signals are evaluated and the active
and apparent power are put into relation. A reversing power flow is identified by the phase
offset between current and voltage signal.
This function also requires internal voltage taps or external voltage transformers and the
voltage metering module VTM.
Characteristic