Robust design for long life time
Specifically designed for partial discharge measurements
TCL couplers contains an internal resistor which provides a suitable dividing ratio @50Hz (as well as 60Hz) for those equipment they require a synchronization signal. It also holds an internal overvoltage gas suppressor which keeps the output voltage below safety limits even in the presence of spikes and overvoltage transient peak on the bus bars. Tested at high vibration level in order to assure high reliability under the most severe conditions. It can be installed in vertical position, upside down and in horizontal position. Endurance voltage test showed an expected life (at rated voltage) in excess of 106 hours, i.e. larger than the expected life of any device it should be matched to.