Circuit breakers with "D" characteristic
Overcurrent circuit breakers of the "D" characteristic are used to protect against the effects of short circuits and overloads of installations of devices with very high starting currents. They do not cause premature power outages. The operating limit of the thermobimetal release is from 1.13 to 1.45 times the rated current, and the operating limit of the electromagnetic release is from 10 to 20 times the rated current of the circuit breaker.