TP007 - Pravilnik o meroslovnih zahtevah za merilne instrumente, ki se uporabljajo za upornosti, impedance zanke, ozemljitvene upornosti povezav in povezav za izenačitev potencialov in ozemljitvene upornosti

This part of IEC 61557 specifies the requirements for testing equipment applied to the testing of the effectiveness of residual current monitors (RCMs) of type A and type B, which are already installed in distribution systems. This test equipment can be used in any kind of network like a TN, TT or IT system. The test equipment may also be used for testing directionally discriminating RCMs in IT-Systems.

This part of IEC 61557 specifies the requirements applicable to equipment for measuring the loop impedance between a phase conductor and the protective conductor or between a phase conductor and neutral or between two phase conductors by using the voltage drop when the circuit under test is loaded.

This part of IEC 61557 specifies the requirements for equipment for measuring earth resistance using an a.c. voltage.

This part of IEC 61557 specifies the requirements applicable to equipment for measuring the insulation resistance of equipment and installations inteh de-energized state.

This part of IEC 61557 specifies the requirements applicable to equipment for measuring the resistance of earth conductors, protective earth conductors and conductors for equipotential bonding, including their connections and terminals, with an indication of the measured value or indication of limits.