Automatic Voltage Regulating Relay : EE-303
Emco Electronics’ Microcontroller based Automatic Voltage Regulating Relay type EE–303 is a new generation Relay used for regulating the secondary voltage of Power Transformers with a motor driven On Load Tap Changer (OLTC).A single control pulse to the motor causes a change in voltage by one step. When step by step function is inactive, the motor drive is controlled by a continuous control pulse.
A “Raise” or “Lower” control signal is generated by the voltage regulator when the measured voltage deviates from preset conditions.
The parameters are programmable through a front panel keyboard and are stored in NonVolatile Memory.
Features:-
- Microcontroller based architecture
- Built-in Tap Position Indicator upto 35 Taps
- Readout of Primary, Secondary Voltages and Tap No.
- Keyboard programmable parameters
- Independent Lower, Raise and Nominal value settings
- Linear or Inverse Time response
- Blocking for UV, OV, CF & Max, Min Tap No.
- Auto-Manual mode of operation
- Test mode for testing AVR
- Minimum and Maximum PT Voltage display
- Single pulse or continuous pulse operation
- Tap Changer Counter
- AVR Disable mode for remote operation
