JIS C 1302:2025

This Standard specifies requirements for portable insulation resistance testers of built-in battery type with rated output voltages of up to 1 000 V, which are used for the following a) to e): a) Insulation measurement of low-voltage distribution circuits: The insulation measurement of circuits and equipment in distribution systems up to 1 000 V AC and 1 500 V DC, which are disconnected from the power source; b) Insulation measurement of equipment, appliances, components, etc; c) Insulation measurement of high-voltage facilities; d) Insulation measurement of photovoltaic arrays in a power generating state by short-circuiting P-N terminals; e) Insulation measurement of photovoltaic arrays in a power generating state without short-circuiting P-N terminals.