IEC 62151:2000 pdf download

IEC 62151:2000 pdf download.Safety of equipment electrically connected to a telecommunication network.
1.4 Basic safety publication
This basic safety publication is primarily intended for use by technical committees in the preparation of standards in accordance with the principles laid down in IEC Guide 104 and ISO1IEC Guide 51. It is not intended for use by manufacturers or certification bodies.
One of the responsibilities of a technical committee is, wherever applicable, to make use of basic safety publications in the preparation of its publications. The requirements, test methods or test conditions of this basic safety publication will not apply unless specifically referred to or Included In the relevant publications.
Where the requirements of this standard differ from the requirements of the relevant safety standard, the requirements of the relevant safety standard take precedence.
Where this publication specifies the use of BASIC INSULATION, and other grades of Insulation, or PROTECTIVE EARThING. the detailed requirements of the relevant product safety standard apply.
2 Normative references
The following normative documents contain provisions which, through reference In this text. constitute provisions of this International Standard. For dated references, subsequent amendments to. or revisions of. any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of IEC and ISO maintain registers of currently valid International Standards.
IEC 60050-195:1998, International Electrotechnicat Vocabulary (1EV) — Part 195: Earthing and protection against electric shock
IEC 60309 (all parts), Plugs, socket-outlets and couplers for industnal purposes
IEC 60990:1999, Methods of measurement of touch current and protective conductor current
IEC 61032:1997, Protection of persons and equipment by enclosures — Probes for verification
IEC Guide 104:1997, The preparation of safety publications and the use of basic safety publications and group safety publications
ISO/IEC Guide 51:1990, Guidelines for the Inclusion of safety aspects in standards
3 Definitions
For the purpose or this International Standard, the following definitions apply
3.1 Fundamental concepts
3.1.1
hazardous-Ilv.-part
live-part wNch, under certain conditions, can give a harmful electric shock
(1EV 195.06-051
3.1.2
touch current
electric current through a human body when it touches one or more ACCESSIBLE parts (1EV 195-05-21 modifiedj
NOTE T0IJCH CURRENT was previously included In tile term leakege currenr,
3.1.3
t.l.communlcatlon n.twork
a metallically terminated transmission medium intended for communication between equipments that may be located in separate buildings, excluding:
— the mains systems for supply, transmission and distribution of electrical power, if used as a telecommunication transmission medium;
— television distribution systems using cable.
NOTE I Th. term TLECOUhI,NICATION NEtWORK ii d&ned in terms ce4 its functionality, not its electrical tivac1eratIcs. A TELECOMMUWICATION NETWORK Ia not itself defined a. bein9 a wv ctRcurr, Only the circuits in equipment are so classifIed,
NOTE 2 A T€L(CO.4rdVNICATION NETWORK may be
— publicly or privately owned
– sub,ect to transient overvoltages due to atmospheric discharges and faults rn power distribution syslenTs:
sub.ct to permanent longitudinal (çQmmon mode) voltages induced from nearby power lines or eieclric traction
lines.
NOTE 3 Examples of TELECOMMUNICATION NETWORKS are
— a public switched telephone network.
— a public data network.
– an ISON networR:
— a private network wilh electrical interface clieractenstic. similar to the abo.
3.2 Insulation
3.2.1
basic Insulation
insulation to provide basic protection against electric shock
3.2.2
supplementary insulation
independent insulation applied in addihon to BASIC INSULATION in order to reduce the risk of electric shock in the event of a failure of the BASIC INSULATION
3.2.3
double insulation
insulation comprising both BASIC INSULATION and SUPPLEMENTARY INSULATION
3.2.4
reinforced insulation
insulation of HAZARDOUS-LIVE-PARTS wttich provides a degree of protection against electric shock equivalent to DOUBLE INSULATION
NOTE REiNFORCED INSULATION nay comprise several layers which cannot be tested singly as BAsic INsaAnoN or SUPPLEMENTARY INSULATION.
[1EV 195-06-09]
3.2.5
functional insulation
insulation that is necessary only for the correct functioning of the equipment
NOTE FUNCTIONAL INSUtATION by definition does no protecl againsT eleclric shock. It may, however. reOuce the likelihood of ird.on and fir.,
3.3 Equipment electrical ratings
3.3.1
rated voltage
the supply voltage (for three-phase ac, supply, the line-to-lIne voltage) as declared by the manufacturer.