Voltage drop and asymmetry relay PZA-1 002471408

Phase failure control relay – reliable protection of electrical installations

The PZA-1 voltage drop and asymmetry relay is a device designed to monitor power supply parameters in three-phase networks. Its main task is to detect the failure of individual phases and voltage asymmetry, allowing for a quick response and protection of connected receivers from damage. This device finds application in both domestic and industrial installations, ensuring safety and continuity of power supply.

Functionality and application

PZA-1 reacts to irregularities in the network voltage, which is particularly important for devices sensitive to voltage fluctuations, such as motors, pumps, or control systems. By detecting phase failure, the relay protects against damage to devices caused by operation under incomplete load. Phase asymmetry control prevents overheating of induction motors and other problems resulting from uneven phase loading. Installation is simple thanks to the use of clamp terminals, which facilitates installation and servicing.

Construction and characteristic features

The PZA-1 relay is characterized by compact dimensions – 18 mm wide, 90 mm high, and 65 mm deep – allowing it to be mounted in limited space. The voltage measurement range is from 175 to 400 V, making it a universal solution for most standard electrical networks. It has one normally open contact, which can be used to signal an alarm or disconnect the receiver. The use of clamp terminals ensures quick and reliable connection of wires. The device is solidly made, guaranteeing its long-lasting and reliable operation.