Main function: assembled with circuit breaker to achieve overvoltage protection
Rated operating voltage Ue: AC 230V, 50Hz;
Rated insulation voltage Ui: 500V
Overvoltage action setting value Uvo: 280 (1 ± 5%) V
When the main circuit voltage is 230 (1 ± 5%) V, the trip unit should be able to keep the circuit breaker working for a long time. When the main circuit voltage rises to 280 (1 ± 5%) V, the trip unit combined with the NXB-125 series circuit breaker should act to disconnect the NXB-125 circuit breaker.
Mechanical durability: The mechanical durability of the trip unit is not less than 4000 operating cycles.