Solution To Dynamic Voltage Regulator Failure

The following are some reasons for the Dynamic Voltage Regulator (DVR) fault phenomenon and treatment methods

Fault phenomenon: cannot start

Reason: input wiring is unreliable; no input voltage

Handling method: rewire and check whether there is any broken wire; use a voltmeter to measure whether there is voltage in the input wiring. Fault phenomenon: no voltage indication in a certain phase

Reason: the wiring of the terminal corresponding to the phase is unreliable

Handling method Check the connection status of the phase wiring and use a multimeter to measure whether there is a circuit break

High power detection

Fault phenomenon: After the dynamic voltage stabilizer is started, the voltage of each phase is unbalanced, and it is too high or too low

Reason: Abnormal input voltage; input and output lines are connected in reverse; each phase does not work properly; input neutral line is not connected or wiring is unreliable. Solution: Check whether the power grid is normal; check the wiring and correct it; check whether the connection of each connector is loose; connect the neutral line (if the neutral line is not connected, when adjusting the output voltage of a certain phase, the voltage of another phase will also change accordingly

Fault phenomenon: The voltmeter on the panel indicates that the voltage of each line is seriously unbalanced

Reason: The voltage of each phase of the power grid exceeds its voltage regulation range; the load is seriously asymmetric

Solution: Loads with high requirements for three-phase balance, such as three-phase motors, must be shut down and the power grid must be checked; adjust each load to ensure the balance of each phase as much as possible.