Notice - product not recommended for new projects.
It is planned to systematically decrease APZ production in favour of new device - APZplus.

 

The APZ family is designed for HV, MV and LV switchgears, supplying mainly non-motorized load, where voltage measurement is based on voltage transformers.

 


     Possibility of operating up to 10 circuit breakers

 

Features of APZ automatic unit:

  • Dedicated for circuit breaker systems (can operate in switchgears with number of circuit breakers from 2 to 10, with possibility of power supply from power generator); 
  • Designed to work on each voltage level (HV, MV and LV);
  • It performs synchronous switching without interruption;
  • Has the ability to switch circuit breakers on the upper side of the transformer supplying the switchgear;
  • Configured individually


Automatic change-over unit (APZ) can perform the change-over in the following cycles:

  • Automatic Transfer of Reserve (ATS) free caused by opening of circuit breaker in supplying line;; 
  • Automatic Power Switching (SZR) slow caused by voltage drop on busbars with closed breaker in supplying line;
  • Scheduled Power-Up Transfer (PPZ) synchronous uninterruptible;
  • Planned Power-Up Transfer (PPZ) synchronous uninterruptible; Planned Power-Up Transfer (PPZ) free;
  • Return Flow Scheduling (RPS) synchronous uninterruptible;
  • Automatic Reverse Power Switching (ARP) - synchronous uninterruptible; Automatic Reverse Power Switching (ARP) - slow;
  • Automatic Power Switching (AZZ) slow