General
Motor protection controller WDH-31-500 serves for the protection and control for low-voltage AC asynchronous motor, provides various control modes and protection functions, rich on-off quantity input and relay output programming functions, and can meet different requirements for on-site protection and control.
Features
Control modeProtection mode, direct starting, two-way starting, two-speed starting, star/triangular starting, auto-transformer step-down starting, soft starter with starting, inverter and starting
ProtectionOverload inverse time, starting timeout, locked-rotor, obstruction, short circuit, current imbalance, phase failure, underload, over flow, overvoltage, undervoltage, residual current, phase sequence, temperature, analog input, tE time, external fault protection, all the protection function can set the alarm value and action at the same time, and can be cast out, respectively
Other functionsEquipped with "anti-shake" function, undervoltage restart function and self-starting function
MeasurementThree-phase voltage, three-phase current, residual current, temperature, analog output, electric energy
Data record20 fault records, 12 entry and change bit records, 12 starting records and 12 parking records
DisplayDot matrix LCD screen, Chinese and English display interface, visualized display of parameters, information and states
OutputSupporting Modbus-RTU or Profibus-DP communication protocol;12-channel programmable switching value input;7-channel programmable relay output;1-channel programmable analog output
