The
motor-protective circuit-breakers
PKZM01, PKZM0 and PKZM4
The PKZM01, PKZM0 and PKZM4 use bimetallic releases which are delayed depending on the magnitude of the current to offer a proven, technical solution for motor protection. The releases are sensitive to phase failure and are temperature-compensated. The rated current with the PKZM0 up to 32 A is split into 15 ranges, for the PKZM01 it is split into 12 ranges and for the PKZM4 up to 63 A into 7 ranges. The installation (motor) and the supply cable are reliably protected by short-circuit releases, permanently set to 14 × Iu. The motor start is also guaranteed in every operational situation. The single-phasing sensitivity of PKZM0 and PKZM4 allows for the use in the protection of EEx e motors. An ATEX certificate has been awarded. The motor-protective circuit-breakers are set to the rated motor current in order to protect the motors.
The following accessories complement the motor-protective circuit-breaker for the various secondary functions:
- Undervoltage release U,