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苏联《Сибруд》生产联合企业广泛使用各类漏电继电器以自动监视绝缘状况、防止触电和及时切断三相交流电源。按照地下采掘金属矿床、非金属矿床和砂矿矿床的统一安全规程要求,以及出厂使用说明书要求,在工作中的漏电继电器每半年至少检查一次。同时,为了提高保护装置的工作安全性和可靠性,要检测漏电继电器和断开电器的总动作时间和各自的动作时间。为了利用电动秒表进行时间测量,已有了许多适用于矿山三相交流电网漏电保护电器的线路。对《Сибруд》矿山地下电气设备进行技术维护的过程中,在测试ИВЗⅢ型漏电保护电器动作时间的便携仪基础
The Soviet “Сибруд” production conglomerates make extensive use of various types of earth leakage relays to automatically monitor the insulation, prevent electric shocks and cut off the three-phase AC power in time. In accordance with the requirements of the uniform safety regulations for underground mining of metal deposits, non-metallic deposits and deposits of sand and as required by the manufacturer’s instructions, leakage relays at work are to be inspected at least once every six months. In the meantime, in order to improve the working safety and reliability of the protection device, it is necessary to detect the total operation time and the respective operation time of the leakage relay and the disconnection appliance. In order to use the electric stopwatch for time measurement, there are many suitable for mine three-phase AC grid leakage protection circuit. In the “Сибруд” mine underground electrical equipment for technical maintenance process, testing ИВЗ Ⅲ type leakage protection appliances operating time of the portable instrument based