The 3UG4511-1BP20 is an analogue phase sequenced Monitoring Relay, the phase sequence in a three-phase network and no adjustments are required for operation. The device has an internal power supply and works using the closed-circuit principle. If the phase sequence at the terminals L1-L2-L3 is correct, the output relay picks up after the delay time has elapsed and the LED is lit. If the phase sequence is wrong, the output relay remains in its rest position.
Analogue Phase Sequence Monitoring Relay
SPST-NC Contact Configuration
Variably Adjustable to Overshoot, Undershoot or Range Monitoring
Freely Configurable Delay Times and Reset Response
Provides Maximum Protection for Mobile Machines and Plants or for Unstable Networks
Automatic direction correction of rotation by sensing power system faults and wrong phase sequence
