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 or class B limits in accordance with IEC 61 326-1 :2020, 7.2 shall apply.
4.7 Indication
The presence of voltage on a conductor within the specified sensitivity range of the non-contact AC voltage indicator shall be indicated visually. Additional means of indication, for example acoustic means or vibration, are permitted.
5 Marking and operating instructions
The requirements of IEC 61 557-1 :201 9, Clause 5 do not apply. The following requirements shall apply instead.
The non-contact AC voltage indicator shall be marked in accordance with IEC 61 01 0-031 :201 5,
Table 1 , with symbol 5 and symbol 7, and at least with the rated voltage to earth and measurement category, the rated frequency and the specified range of sensitivity.IEC 61557-17 pdf download.