1) The installation of circuit breakers should comply with the requirements of GB13955-92 standard and product manual.

2) The installation of circuit breakers should fully consider the power supply line, power supply mode, power supply voltage, and system grounding type.

3) The rated voltage, rated current, short-circuit breaking capacity, and breaking time of the circuit breaker should meet the requirements of the protected power supply line and electrical equipment.

4) The installation and wiring of circuit breakers should be correct. The wiring of residual current protectors varies in single-phase, three-phase three wire, and three-phase four wire power supply systems with different grounding forms, and full attention should be paid