BS EN 50191:2010 pdf download.Erection and operation of electrical test equipment.
BS EN 50191 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;
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 60364-4-41;
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 resistance of 2 kQ does not exceed 3 mA ac. (r.m.s.) or 12 mA d.c;
C) at frequencies above 500 Hz 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;
d) the discharge energy does not exceed 350 mJ.
NOTE I Even though compliance with the requwements ol 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 shal be considered and appopnato measures be taken.
NOTE 2 Ret, 1,2 b) & 1.2 d): The values for the resultant current of 3 mA ac. or 12 mA dc, and the discharge energy of
350 mJ comply with the values for live working specified in EN 50110-1 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 1 000 V) or HD 637 (for nominal voltages exceeding 1 kV) are applicable to erection and EN 50110-1 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 1 000 V) or HD 637 (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.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
EN ISO 13850;2008, Safety of machinery — Emergency stop — Principles for design (ISO 13850;2006)
EN 574;1996 + Al ;2008, Safety of machinery — Two-hand control devices — Functional aspects — Principles for design
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
electrical test installations
(referred to in the following as test installations)
the entirety of all the test devices, test appliances and facilities combined for test purposes, by means of which electrical tests are performed on test objects.
Types of test installations:
– test station;
– test laboratory or experimental station;
– temporary test installation
3.2 test station
appropriately identified test installation within a defined area. In test stations a distinction is made between those with and those without automatic positive protection against direct contact
3.2.1 test station with automatic protection against direct contact
test station in which the test object and all live parts of the test installation have automatically activated full protection against direct contact in an energized condition
NOTE I At a test stalon Mth automatic protection against direct ntact. there is generally only one person employed. e. g. in the line of senes produchon or m elec*ric workshops, repair and service shops.
NOTE 2 Automatic protection means that voltages can only occur when the safety devices are effective, eg when the cover or door of the test slahon is closed,
3.2.2 test station without automatic protection against direct contact
test station in which parts of the test object or live parts of the test installation are not fully protected against direct contact during testing. This includes, for instance, test areas in electric workshops, laboratories, measurement and experimental areas
3.3 test laboratory
test installations with minimum one test station in a securely enclosed space or within an area separated from adjacent work areas, in which several persons are generally employed on test work on larger test objects remaining there for a longer period of time.BS EN 50191 pdf free download.