• Emco Electronics

Voltage Regulating Relay

Emco Electronics offers solid-state automatic Voltage Regulating Relay, type EE 301-E. This compact model is designed for operational simplicity, at lowest price. It regulates the secondary voltage of power transformers with on-load tap changers. The bandwidth control allows the deadband to be set in terms of upper (lower volts) and lower (upper volts) voltage limits around a nominal value of 110 V. The time delay control allows the regulator to respond only to the voltage fluctuations lasting for periods greater than the selected time delay. Where the voltage correction requires more than one tap change, the time delay is reinitiated before further tap changes. No special provision is required to reset the time delay, which resets automatically after the voltage correction. One pair of normally open relay contacts is provided to effect the tap changer raise and lower operations. The relay is of draw out construction and can be easily withdrawn from the case for servicing. The output input connections are made through a terminal block on the rear panel. The relay is very compact and light weight and occupies less space on the control panel.