CONTROLAB JSC-88-10P Small Voltage Detector High Quality 120 - 600 V

A very reliable way to establish with certainty whether or not there is voltage present downstream from the switches or breakers during power-offs. It dramatically increases the safety of personnel assigned to maintenance work on electrical equipment powered by three-phase voltage. If voltage is present downstream of the breakers, one or more (leds) on the JSC-88 will stay lit. As soon as one of the 3 leds are lit, the remote klq-kit LED lights up. A simple visual inspection tells you whether the electrical system is in "zero energy" mode.