Automatic circuit breakers AK50B-3MG OM3 40A are designed to conduct current in normal mode and turn off the current during overloads and short circuits or only during short circuits, as well as for operational switching on and off of electrical circuits, including asynchronous motors. The main purpose of the AK50B 3MG OM3 40A series circuit breakers is to protect ship electrical installations. Meet the requirements of the Russian Maritime Register of Shipping.