SEW ST-850 Phase Sequence Indicators (Contact Type)
Phase Detector (RST)
● Two functions in one unit: open phase and phase sequence detection. ● Lamps let you determine at-a-glance if phase is open. ● Large size alligator clips for easy clipping onto switch-boards terminals. ● Checks a wide range of 3-phase power sources. ● Special test leads length are available on request. ● Push button switch is designed to minimize damage due to negligence.