Phase Sequence Protection Relay

Over Voltage Three Phase Voltage Monitoring Relay With Timer And Counter

The voltage phase sequence protector (voltage monitor) is used to protect the voltage from the wrong phase (fault recognition protection, automatic phase sequence troubleshooting), phase failure, overvoltage, undervoltage, voltage unbalance  and some products ZHRV1 can be added PTC temperature protection and load side protection function, with self-reset and test function protector.

Phase failure: refers to the fact that the order of the phases is not in the correct order of the zero value of the alternating current from the negative value to the positive value.

Phase failure: Phase failure is a phenomenon in which one or more phases in the loop are disconnected, but not all phases lose voltage and no current. Or a phase voltage less than 60% of the rated voltage;

Overvoltage: The voltage (Umax-Ue)/Ue*100% exceeding the equilibrium potential of the electrode required for the discharge of ions on the electrode;

Undervoltage: The voltage required for ions to discharge on the electrode is lower than the equilibrium potential of the electrode (Umin-Ue)/Ue*100%;

Voltage unbalance: Indicates the difference in amplitude between three-phase voltages, or the phase shift from the normal voltage phase difference, or both; commonly used negative-sequence voltage or zero-sequence voltage and positive-sequence voltage The percentage of the ratio indicates the degree of voltage imbalance refers to the maximum or minimum voltage voltage deviation rate from the voltage average.

♦ Features

♦ Typical Applications

♦ Typical Applications