The circuit breaker with its accessories is located on APU 30 sliding bracket and works with a plug connector base on the supporting structure of the switchgear. The kit can be inserted into the base using a lever.

Control circuits are routed to a terminal block and plug-in terminals. Control circuits are protected with 6 A fuses.

APA 30 circuit breaker in withdrawable version is used to connect operating currents and protect LV electrical circuits against the effects of overloads and short circuits. The circuit breaker can be additionally equipped with surge arrester, e.g. V NH00 280, mounted on 00 fuse block. It replaces withdrawable APU 30 circuit breaker. Due to the use of a frame for APU 30 circuit breaker, the replacement is quick, safe and does nor require modifications of the switchgear.

APA 30 circuit breaker consists of:

• NZMN3 circuit breaker block (Eaton) with motor drive
• asymmetry of phase control relay (option)
• auxiliary relay (option)
• control circuit protection
• limit switch
• interlock switch
• surge arrester (option)
• elements from APU 30 in withdrawable version, which are renovated before mounting
• sliding bracket
• metal casting with insulators
• upper and lower rails with plug-in terminals
• plug unit for auxiliary contact of the switchgear