Elma 4000/D37N is the ideal kit to identify fails to ground in IT and TT nets and leak current in IT, TN and TT nets. The set consist of a 4Hz transmitter and a receiver with a current clamp to pick up the signal and read out the fail to ground or leakage current. Using the transmitter to detect (IT net): The generator is inserted between any phase and ground. The current clamp is connected to the digital receiver and the fault to ground is read out as a percentage (%) of the full generator loop power. The Generator is supplied with 230V and a LED will flash with the signal frequency. Using only the clamp (All nets): The current clamp is connected to the receiver and the leakage current is read directly as mA. The selector is set at 50Hz A/mA and the clamp should enclose all wires including the neutral. Elma 4000/C173 is delivered ready to use in a suitcase with Generator, reciever and current clamp type C173 Ø54mm.