Dold RN9877.11/800 AC150-450V US290V Safety relay, Part N: 0068251

The overvoltage relay RN 9877/800 of the VARIMETER PRO series monitor overvoltage in a AC network. The measurement is very simple and without extensive wiring as there is no auxiliary power supply necessary. The early detection of up-coming break downs and preventive maintenance avoid expensive damages. As user you profit from the reliability and availability of your plant.