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IEC 61010-2-033-2019 pdf free download
IEC 61010-2-033-2019 pdf free download.Safety requirements for electrical equipment for measurement, control and laboratory use Part 2-033: Particular requirements for hand-held multimeters for domestic and professional use, capable of measuring MAINS voltage
Exigences de sécurité pour appareils électriques de mesurage, de regulation et de laboratoire — Partie 2-033: Exigences particulières pour les multimètres portatifs pour usage domestique et professionnel, capables de mesurer Ia tension RESEAU.
101.4 Protection against MAINS overvoltages
To ensure protection against arc flash or fire, measuring circuits RATED for measuring MAINS voltages shall have minimum CLEARANCES and CREEPAGE DISTANCES equivalent to BASIC INSULATION between MAINS-connected conductive parts of opposite polarity.
Conformity is checked by inspection and measurement.
In addition, the measuring circuit TERMINALS of a voltage measuring circuit shall withstand the applicable TRANSIENT OVERVOLTAGE with the voltage measurement function selectors set for the proper function and range, without damage which could cause a HAZARD.
Conformity is checked by the following impulse voltage test using the applicable impulse voltage of Table 102.
The impulse voltage is applied between each pair of TERMINALS. The impulse voltage test shall be conducted for five impulses of each polarity spaced up to 1 mm apart, from a hybrid impulse generator (see IEC 61180). The generator produces an open-circuit voltage waveform of 1,2/50 ps, a short-circuit current waveform of 8/20 ps, with an output impedance (peak open-circuit voltage divided by peak short-circuit current) of 2.0. Resistance may be added in series if needed to raise the impedance.
The impulse voltage is applied while the circuit is working under conditions of NORMAL USE, in combination with the MAINS voltage.
The MAINS voltage used for the test is the maximum RATED line-to-neutral voltage of the MAINS being measured. For measuring circuits RATED for MAINS line-to-neutral voltages above 400 V a.c. r.m.s. or d.c., the test may be performed with an available MAINS voltage source that has a line-to-neutral voltage of at least 400 V a.c. r.m.s. or d.c.IEC 61010-2-033-2019 pdf free download.
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