Ambient air temperature: Upper limit of +40℃; Lower limit of -5℃; 24-hour average ambient air temperature not exceeding +35℃.
Altitude: Installation site altitude not exceeding 2000m.
Atmospheric conditions: Relative humidity not exceeding 50% at an ambient air temperature of +40℃; higher relative humidity is permissible at lower temperatures; the maximum average relative humidity for the wettest month is 90%, with a minimum average temperature of +25℃ for that month, taking into account condensation on the product surface due to temperature changes.
Pollution level: Level 3.
Control Circuit: It should be able to monitor the integrity of the control circuit protection devices and their tripping and closing circuits to ensure the normal operation of the circuit breaker;
It should be able to indicate the normal closing and opening position of the circuit breaker, and provide clear indication signals during automatic closing and automatic tripping;
After closing and tripping, it should be able to release the command pulse, i.e., disconnect the power supply for closing or tripping;
In the absence of a mechanical anti-pumping device, an electrical anti-pumping device should be installed;
The circuit breaker's fault tripping signal circuit should be wired according to the "non-correspondence principle";
For equipment that may experience abnormal operating conditions or faults, a warning signal should be installed;
The power supply for spring operating mechanisms and manual operating mechanisms can be DC or AC, while the power supply for electromagnetic operating mechanisms requires DC.