Circuit breaker use environment

The characteristics of the circuit breaker are mainly: rated voltage Ue; rated current In; overload protection (Ir or Irth) and short-circuit protection (Im) decoupling current rectification range; rated short-circuit breaking current (industrial circuit breaker Icu; household circuit breaker Icn), etc. It is required to work under certain conditions.

Surrounding air temperature: the upper limit of the surrounding air temperature +40℃; ○ the lower limit of the surrounding air temperature -5℃; the average value of the surrounding air temperature for 24h does not exceed +35℃.

Altitude: The altitude of the installation site does not exceed 2000m.

Atmospheric conditions: The relative humidity of the atmosphere does not exceed 50% when the surrounding air temperature is +40℃; there can be higher relative humidity at lower temperatures;

Pollution level: Pollution level is 3.

Control circuit.

1, should be able to monitor the control circuit protection device and its tripping, closing circuit integrity to ensure the normal operation of the circuit breaker;

2, should be able to indicate the normal closing and breaking position of the circuit breaker state, and in the automatic closing and automatic tripping with an obvious indication signal;

3、After the completion of closing and tripping, the command pulse should be able to lift, that is, to cut off the power of closing or tripping;

4, in the absence of mechanical anti-jump device, should be retrofitted with electrical anti-jump device;

5, the circuit breaker accident tripping signal circuit, should be wired according to the "principle of non-correspondence";

6, the possibility of abnormal working condition or failure of the equipment, should be equipped with advance signals;

7, the spring-operated mechanism, manual operating mechanism power supply can be DC or AC, electromagnetic operating mechanism power requirements with DC.