BS EN 50191:2010

Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Erection of test installations
5 Operation of test installations
Annex A (normative) - Tables
Annex B (informative) - Example of an application
        illustrating the prohibition zone and test
        area
Bibliography

Pertains to the erection and operation of fixed and temporary electrical test installations.

1.1 This European Standard is applicable to the erection and operation of fixed and temporary electrical test installations.1.2 Compliance with this European Standard is not necessary, if contact with live parts presents no danger. This is the case when one of the following conditions is satisfied at live exposed points: the voltage at frequencies above 500Hz does not exceed 25V a.c. or 60V d.c. and complies with the requirements for SELV or for PELV in accordance with HD 60364-4-41; in case of voltages at frequencies up to 500Hz exceeding 25V a.c. or 60V d.c., the resultant current through a non-inductive resistance of 2 kΩ does not exceed 3mA a.c. (r.m.s.) or 12mA d.c; at frequencies above 500Hz the national determined current and voltage values shall be applied. If there are no national requirements determined reference values for permissible body currents and contact voltages can be taken from Table A.1; the discharge energy does not exceed 350mJ.NOTE1 Even though compliance with the requirements of this European Standard is not necessary, if one of the above- mentioned conditions is satisfied, other potential risks e. g. risk of fire and explosion shall be considered and appropriate measures be taken.NOTE2 Ref. 1.2 b) & 1.2d): The values for the resultant current of 3mA a.c. or 12mA d.c. and the discharge energy of 350mJ comply with the values for live working specified in EN50110-1. These values also comply with the values specified in IEC/TS 60479-1.1.3 This European Standard does not apply to the power supply to the test installations. In this case, the documents of the HD 60364 series (for nominal voltages up to 1000V) or HD 637 (for nominal voltages exceeding 1kV) are applicable to erection and EN50110-1 is applicable to operation.1.4 Where no requirements are given in this European Standard, the documents of the HD 60364 series (for nominal voltages up to 1000V) or HD 637 (for nominal voltages exceeding 1kV) apply to the erection of electrical test installations and EN50110-1 applies to the operation of electrical test installations.