EVS-EN 50191:2007

This standard is applicable to the erection and operation of fixed and temporary electrical test installations.
Compliance with this 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:
a) The voltage at frequencies above 500 Hz does not exceed 25 V a.c.  or 60 V d.c. and complies with the requirements for SELV or for PELV in accordance with HD 384.4.41.
b) In case of voltages at frequencies up to 500 Hz exceeding 25 V a.c.or 60 V d.c., the resultant current through a non-inductive resi¬stance of 2 k? does not exceed  3 mA a.c. (r.m.s.). or 12 mA d.c.
c) At frequencies above 500 Hz no hazardous body currents or contact voltages occur. In these cases the national determined current and voltage values should 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 in Annex A.
d) The discharge energy does not exceed 350 mJ.
Even though compliance with this standard is not necessary if one of the above-mentioned conditions is satisfied, other potential risks shall be considered and appropriate measures put into place to obviate the risks.
This standard does not apply to the power supply to the test installations. In this case, the standards of the HD 384 series (for nominal voltages up to 1000 V) or HD 637 S1 (for nominal voltages exceeding 1 kV) are applicable to erection and EN 50110-1 is applicable to operation.
Where no requirements are given in this standard, the standards of the HD 384 series (for nominal voltages up to 1000 V) or HD 637 S1 (for nominal voltages exceeding 1 kV) apply to the erection of electrical test installations and EN 50110-1 applies to the operation of electrical test installations.