A frequency variations involves a change in frequency from the normally stable utility frequency of50 hz / 60hz. This may be caused by erratic operation of emergency generators or unstable frequency power sources. MFR 8801 reads the frquency. Displays it and compares it with set frequency and trip the device if frequency read is out of selected range.
We use cookies to ensure that we give you the best experience on our website. If you continue to use this site we will assume that you are happy with it.Ok