To be assembled with circuit breaker to achieve over/under voltage protection
Figure 3
Figure 2
Rated operation voltage Ue: AC240V, 50Hz;
Overvoltage operation setting value Uvo: 280V;
Rated insulation voltage Ui: 500V;
Tripping characteristics: the release is assembled with NXB-125 series circuit breaker. When
the applied voltage is reduced to 35%Ue or increased to 95% ~ 105% of the over-voltage
setting value, the release should drive the circuit breaker to act. When the applied voltage
is below 35%Ue or above 105% of the over-voltage setting value, the release should be
able to prevent the circuit breaker from closing. When the supply voltage is above 85%
Ue and below 95% of over-voltage setting value, the circuit breaker should be able to close
normally. The upper limit of the applied voltage should be less than 110% over-voltage
operation setting value.
Mechanical and electrical life: the mechanical and electrical life after the release is assembled
with the circuit breaker should be 4000 cycles, of which, 500 cycles for over-voltage trip
and under-voltage trip each, and 3000 cycles for the open/close of the circuit breaker.