The automatic circuit breaker to protect the ABB 1SAM250000R1009 engine

Purpose of

automatic circuit breakers to protect the engine are specially designed to protect electric motors. The advantage of these devices is the competence of protection. They can work both autonomously and complete with a magnetic starter.

Scope

automatic circuit breakers are specially designed for use in circuits for protection of electric motors. The most widespread use, the automatic motor was received in drives with engines with a power of up to 12.5 kW at a voltage of 380V.

The principle of action

The current characteristic is configured taking into account the starting currents arising during the start of the start electric motors.

The presence of temperature compensation. The engine protection machines are equipped with thermomagnity by the power outlets, which include a thermal lock based on a bimetallic plate and an electromagnetic lock. The setting of thermal units can change significantly under the influence of external temperature, which is unacceptable when protecting electric motors, as it can lead to false triggering or burning out the electric motor. Therefore, most imported automatic circuit breakers compensate for the change in the temperature of the external environment, to exclude the effect of temperature on the value of the operation.

engine protection machines can be understood by additional assembly units that provide additional protection of the engines or increase the possibility of building a flexible automated system.