Installation manual

11-28 Frame 14 Installation
Resetting the Circuit Breakers
The electronic trip unit will open the circuit breaker in the case of a drive
overload/overcurrent condition. When a voltage drop (U < 0.7 x Un) or loss
of the main supply occurs, the undervoltage release coil of the circuit
breakers will open. The trip indicator contacts of the circuit breakers are
connected in series. Therefore, if one circuit breakers trips due to an
undervoltage or overload/overcurrent condition, all circuit breakers will
open/trip.
If the circuit breakers have opened due to an overcurrent fault, the condition
that caused the fault must be corrected and the fault cleared before the
circuit breakers can be reset and the drive started. In this case, refer to
"Charging the MCCB Motor Operators" on page 11-26
.