EN 50191:2000

SLOVENSKI STANDARD
01-marec-2001
Erection and operation of electrical test equipment
Erection and operation of electrical test equipment
Errichten und Betreiben elektrischer Prüfanlagen
Installation et exploitation des équipements électriques d'essais
Ta slovenski standard je istoveten z: EN 50191:2000
ICS:
19.080 (OHNWULþQRLQHOHNWURQVNR Electrical and electronic
SUHVNXãDQMH testing
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 50191
NORME EUROPÉENNE
EUROPÄISCHE NORM September 2000

ICS 29.020; 19.080
English version
Erection and operation of electrical test equipment

Installation et exploitation des Errichten und Betreiben elektrischer
équipements électriques d'essais Prüfanlagen

This European Standard was approved by CENELEC on 1999-10-01. CENELEC members are bound to
comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and
notified to the Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic,
Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway,
Portugal, Spain, Sweden, Switzerland and United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2000 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 50191:2000 E
Page 2
Foreword
The text of this European Standard, prepared by CENELEC BTTF 85-1, Erection and operation of electrical test
equipment, was submitted to the formal vote and was approved by CENELEC as EN 50191 on 1999-10-01.

The following dates were fixed:

– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2001-03-01

– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2002-10-01

Annexes designated "normative" are part of the body of the standard.
Annexes designated "informative" are given for information only.
In this standard, annex A is normative and annex B is informative.

__________
Page 3
Contents Page
Introduction.4
1 Scope.4
2 Normative references.4
3 Definitions.5
4 Erection of test installations .7
4.1 General.7
4.2 Test stations with automatic protection against direct contact.8
4.3 Test stations without automatic protection against direct contact .9
4.4 Test laboratories and experimental stations .10
4.5 Temporary test station .11
4.6 Test station without test personnel in permanent attendance.11
5 Operation of test installations.11
5.1 General.11
5.2 Personnel.11
5.3 Preparation of tests, switching operations in test stations.12
5.4 Test procedure.12
Annex A (normative) Permissible body currents and contact voltages .14
Annex B (informative) Example of an application illustrating the prohibition zone and test area .17

Page 4
Introduction
With reference to clause 5, the user of this EN, prepared in the field of application of Article 118 A of the EC
Treaty, should be aware that standards have no formal legal relationship with Directives which may have been
made under Article 118 A of the Treaty. In addition, national legislation in the Member states may contain more
stringent requirements than the minimum requirements of a Directive based on Article 118 A. Information on the
relationship between the national legislation implementing Directives based on Article 118 A and this EN may be
given in a national foreword of the national standard implementing this EN.
1 Scope
1.1 This standard is applicable to the erection and operation of fixed and temporary electrical test
installations.
1.2 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 resistance of 2 kΩ 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.
1.3 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.
1.4 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.
2 Normative references
This European Standard incorporates by dated or undated reference, provisions from other publications.
These normative references are cited at the appropriate places in the text and the publications are listed
hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply
to this European Standard only when incorporated in it by amendment or revision. For undated references
the latest edition of the publication referred to applies.
EN 294 Safety of machinery - Safety distance to prevent danger zones being reached by the upper
limbs
EN 418 Safety of machinery - Emergency stop equipment, functional aspects - Principles for
design
EN 574 Safety of machinery - Two-hand control devices - Functional aspects - Principles for design
EN 50110-1 Operation of electrical installations
EN 60529 Degrees of protection provided by enclosures (IP Code) (IEC 60529)
EN 61219 Live working - Earthing or earthing and short-circuiting equipment using lances as short-
circuiting device - Lance earthing (IEC 61219)
EN 61310-1 Safety of machinery - Indication, marking and actuation -- Part 1: Requirements for visual,
auditory and tactile signals (IEC 61310-1)

Page 5
EN 61558 Safety of power transformers, power supply units and similar (IEC 61558 series)
HD 366 Classification of electrical and electronic equipment with regard to protection against
electric shock (IEC 60536)
HD 384 series Electrical installations of buildings (IEC 60364 series, modified)
HD 637 S1 Power installations exceeding 1 kV a.c.
IEC 60050-826 International Electrotechnical Vocabulary -- Chapter 826: Electrical installations of
buildings
3 Definitions
For the purpose of this standard, the following definitions apply:
3.1
electrical test installations
(referred to in the following as test installations)
the entirety of all the test appliances and devices combined for test purposes, by means of which electrical
tests are performed on test objects
Test installations may be designed and erected or installed as:
- test station;
- test laboratory or experimental station;
- temporary test installations.
3.2
test station
appropriately identified test installations within a defined area in which only one or two persons are generally
employed on test work, e.g. in the line of series production or in electric workshops, repair and service shops
In test stations a distinction is made between those with and those without automatic protection against
direct contact.
3.2.1
test station with automatic protection against direct contact
a test station in which the test object and all live parts of the test apparatus have automatically activated full
protection against direct contact in an energized condition
NOTE  Automatic protection means that voltages can only occur when the safety devices are effective, e.g. when the
cover or door of the test station is closed.
3.2.2
test station without automatic protection against direct contact
a test station in which parts of the test object or live parts of the test apparatus 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 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
A test laboratory may be subdivided into test areas in which mutually independent tests are performed.
3.4
experimental station
test installations for performing experiments or tests within the scope of research and development work. In
general, no routine tests are performed in experimental stations. A variety of test assemblies as well as
different hazards shall therefore be anticipated
An experimental station may be subdivided into sections in which mutually independent experiments or tests
are carried out.
Page 6
3.5
temporary test installations
test installations erected for a short time in order to perform tests on individual test objects
3.6
prohibition zone
a volume around live parts which should not be breached if full protection against direct contact with these
parts is not provided
3.7
test area
the area around the test assembly which is separated from the surrounding area
3.8
signal lights
lights which are clearly visible from outside the boundaries of the test area giving red or green signals to
indicate the operational status inside the test area
3.9
indicator lights
serve to indicate the switching status on the control panels. They are not an alternative to required signal
lights
3.10
risk
a combination of the probability and the degree of the possible injury or damage to health of a person
exposed to a hazard or to hazards
3.11
electrical hazard
a source of possible injury or damage to health in presence of electrical energy from an electrical installation
3.12
skilled person
a person with relevant education and experience to enable him or her to avoid dangers which electricity may
create. (IEV 826-09-01, modified)
3.13
instructed person
a person adequately advised by skilled persons to enable him or her to avoid dangers which electricity may
create (IEV 826-09-02, modified)
3.14
nominated person in control of a work activity
that person who has been nominated to be the person with direct management responsibility for the work
activity. parts of this responsibility may be delegated to others as required
3.15 Operational status
3.15.1
out of operation
status when
a) all power supplies, signalling and control circuits are switched off and secured against unauthorized
switching-on,
b) all safety precautions necessary before entering the test area (for voltages exceeding 1 kV, e.g.
earthing, short-circuiting) have been taken
3.15.2
ready for operation
status when
a) the power supplies for the switchgear signalling and control circuits of the test installations are switched
on,
b) the green signal lights, where these are required in accordance with the provisions in clause 4, are on,
c) all power supplies for the tes
...