IEC 61557-17-2021 Electrical safety in low voltage distribution systems up to 1 000 V AC and 1 500 V DC – Equipment for testing, measuring or monitoring of protective measures – Part 17: Non-contact AC voltage indicators

IEC 61557-17-2021 Electrical safety in low voltage distribution systems up to 1 000 V AC and 1 500 V DC – Equipment for testing, measuring or monitoring of protective measures – Part 17: Non-contact AC voltage indicators. 4 Requirements 4.1 General The requirements of IEC 61 557-1 :201 9, Clause 4 and the following requirements apply. 4.2 Influencing quantities – Operating uncertainty (B), percentage operating uncertainty (B [%]) IEC 61 557-1 :201 9, 4.2 does not apply. 4.3 Rated operating conditions The following rated operating conditions shall apply: a) ambient temperature range from: −1 0 °C to +45 °C; b) maximum relative humidity 95 % at temperatures up to 31 °C, decreasing linearly to 50 % relative humidity at 45 °C; c) distance through air between live conductor and probe tip: ≤ 2 mm; d) position within a solid angle of 30° around the vertical axis between probe tip and conductor; e) capacitance greater than or equal to 1 00 pF between the hand-held part and reference earth, see Figure 2. 4.4 Battery test facility In addition to IEC 61 557-1 :201 9, 4.4, the following applies. Non-contact AC voltage indicators shall have a self-test capability. As a minimum, the self-test function shall confirm correct operation of the batteries and of the voltage indication. 4.5 Safety The requirements in accordance with IEC 61 557-1 :201 9, 4.5, do not apply. The following requirements shall apply instead. All electrical safety aspects are covered by IEC 61 01 0-031 . The hand-held parts of the non-contact AC voltage indicator and the probe tip shall be separated by a protective fingerguard, see Figure 1 . The clearance and creepage distance between the outmost tip of the probe and the hand-held part of the fingerguard shall fulfil the requirements for double or reinforced insulation in accordance with IEC 61 01 0-031 . The probe tip shall be insulated by double or reinforced insulation from the handheld parts. The insulation shall fulfil the relevant requirements of IEC 61 01 0-031 . Non-contact AC voltage indicators shall be designed for measurement category III at a minimum and for a minimum rated voltage to earth of 300 V. The design of the protective fingerguard shall fulfil the requirements of IEC 61 01 0-031 . 4.6 Electromagnetic compatibility 4.6.1 Immunity For immunity requirements, IEC 61 326-1 :2020, Table 2 shall apply. 4.6.2 Emission For emissions, either class A...