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. (Published Document (JS))
This part of IEC 61557 specifies the requirements for measuring equipment applied to the testing of the effectiveness of protective measures by regular disconnections of residual current protective devices (RCD) in TT, TN and IT systems. (Published Document (JS))
This part of JS 61557 specifies the requirements for measuring equipment applied to testing the phase sequence in three-phase distribution systems. Indication of the phase sequence may be mechanical, visual and/or audible. (Published Document (JS))
This part of JS 61557 specifies the general requirements for measuring and monitoring equipment for testing the electrical safety in low voltage distribution systems with nominal voltages up to 1 000 V a.c. and 1 500 V d.c. (Published Document (JS))
This part of JS 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. (Published Document (JS))
This part of JS 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. (Published Document (JS))
This part of JS 61557 specifies the requirements for insulation monitoring devices (IMD) which permanently monitor the insulation resistance to earth of unearthed IT a.c. systems, for IT a.c. systems with galvanically connected d.c. circuits having nominal voltages up to 1 000 V a.c., as well as of unearthed IT d.c. systems with voltages up to 1 500 V d.c. (Published Document (JS))
This part of JS 61557 specifies the requirements applicable to equipment for measuring the insulation resistance of equipment and installations in the de-energized state. (Published Document (JS))
This part of JS 61557 specifies the requirements for equipment for measuring earth resistance using an a.c. voltage. (Published Document (JS))
This standard applies to the use of electronic equipment in power installations where a uniform technical level with respect to safety and reliability is necessary . (Published Document (JS))
