The switchable voltage levels of 0 - 3, 6 and 12 kV are primarily intended for the lower voltage ranges but cover also medium voltage application up to 11 kV. In most cases the T 18/5 is an integrated part of a fault location system. Optional it is possible to double the surge energy from 1000 Joule to 2000 Joule. Key benefits: Low voltages High surge energy