IEC 61010-1 Safety requirements for electrical equipment for measurement, control, and laboratory use – Part 1: General requirements

Voltages shown as two voltages separated by a“I” represent the phase-to-neutral (or line-to-neutral) voltage followed by the phase-to-phase (or line-to-line) voltage. For examiple,“120/208″ indicates that the voltage from any phase to neutral is 120 V, and the voltage from any phase to another phase is 208 V. Likewise, “220/440” indicates that the voltage from either line-to-neutral is 220 V, and the voltage from line-to-line is 440 V.

Z is an impedance which may connect neutral to earth (usually 1 500 Q ).

When insulation is monitored, neutral of these systems is considered to be earthed.

LISUN following instruments fully meet IEC 61010-1 Safety requirements for electrical equipment for measurement, control, and laboratory use – Part 1: General requirements:

 

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