FIELD: electrical engineering and energy.
SUBSTANCE: invention relates to the field of electrical engineering and energy, namely to a differential circuit breaker that can be used for prompt emergency shutdown of electrical equipment when exposed to high temperatures, such as fire, as well as overload, short circuit or current leakage. The differential circuit breaker includes a housing and a module (12) with an aerosol-forming or gas-forming composition placed inside, while the module (12) protrudes beyond the circuit breaker housing and contains a self-igniting thermal igniter (22) on the ledge, having an initiation temperature lower than the initiation temperature of the module (12 ), and additionally contains a shutdown temperature-sensitive device (8), a contact group (18) for initiation by an external signal, a trigger sensor (21) and a button (25) for manual start of the electric igniter.
EFFECT: increasing the efficiency of primary fire extinguishing with an increase in the efficiency of preventing the spread of fire in a confined space, in particular, such as an electrical panel, with simultaneous opening of the electrical circuit, while the described device can open the electrical circuit in the event of a short circuit or prolonged overload, with electric current leaks without initiating an aerosol-forming or gas generating fire extinguishing system, operating as a typical differential circuit breaker for single or three phase connections.
6 cl, 4 dwg
