For users of Martindale VI-13700, Drummond MTL7 Test Lamps and other Low/Medium Voltage Testing Devices, we can now supply the PU2/4 Proving Unit.  The unit is a portable, simple to use battery operated voltage tester. PU2/4 Proving Unit features a 500V nominal open circuit voltage, high frequency pulsating d.c. 4KHz nominal which when operated with […]