The device is designed to protect people from electric shock and other dangerous consequences of current leakage to earth in electrical networks of three-phase alternating current frequency of 50 Hz voltage 380/660 V with insulated neutral transformer, used in underground workings and on the surface of coal and mining enterprises in temperate and cold, and tropical climates.
The apparatus is available in two versions:
- The AZUR.1 replaces the AZPB and AZSH.1.
- AZUR.2 replaces BZP-1A and AZSH-2..
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