IEC 61958:2000 pdf download

IEC 61958:2000 pdf download.High-voltage prefabricated switchgear and controlgear assemblies – Voltage presence indicating systems
1 General
1.1 Scope
This International Standard is applicable to voltage presence indicating systems (VPIS) incor-
porated in a.c. switchgear and controlgear covered by IEC 60298 or IEC 60466.
Voltage presence indicating systems are devices used to provide information to operators
about the voltage condition of the main circuit of the switchgear in which they are installed.
The indication of VPIS alone is not sufficient to prove that the system is dead: if operating
procedures make it mandatory, relevant voltage detectors according to IEC 61243 shall be
used.
This standard is also applicable to phase comparators specifically designed for use with VPIS.
1.2 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(601), International Electrotechnical Vocabulary (IEV) – Chapter 601: Generation,
transmission and distribution of electricity – General
IEC 60060-1, High-voltage test techniques – Part 1: General definitions and test requirements
IEC 60068-2-14, Environmental testing – Part 2: Tests – Test N: Change of temperature
IEC 60068-2-75, Environmental testing – Part 2: Tests – Test Eh: Hammer tests
IEC 60298, A.C. metal-enclosed switchgear and controlgear for rated voltages above 1 kV and
up to and including 52 kV
IEC 60466, A.C. insulation-enclosed switchgear and controlgear for rated voltages above 1 kV
and up to and including 38 kV
IEC 60529, Degrees of protection provided by enclosures (IP code)
IEC 60694, Common specifications for high-voltage switchgear and controlgear standards
IEC 61243-1, Live working – Voltage detectors – Part 1: Capacitive type to be used for
voltages exceeding 1 kV a.c.
IEC 61243-2, Live working – Voltage detectors – Part 2: Resistive type to be used for voltages
of 1 kV to 36 kV a.c.
IEC 61243-5, Live working – Voltage detectors – Part 5: Voltage detecting systems (VDS)
2 Service conditions
VPIS are designed to be used under the same service conditions as the switchgear in which
they are installed, as defined in clause 2 of IEC 60694.
3 Definitions
For the purpose of this International Standard the following definitions apply.
3.1 voltage presence indicating system (VPIS)
device used to indicate the presence of operating voltage
NOTE 1 VPIS may also be used in conjunction with phase comparators.
NOTE 2 VPIS are not designed to detect reliably the absence of voltage: for this purpose, only voltage detectors or voltage detecting systems (VDS according to IEC 61243-5) should be used.
3.2 coupling element
part of the VPIS connected to the main circuit which transmits to the indicating element a
signal related to the voltage condition of this circuit. Different physical principles can be used
for the coupling element, for example, capacitive, resistive, optical, etc.
3.3 indicating element
part of the VPIS which gives a visual indication depending on the input signal received from the
coupling element
3.4 connecting point
point of the indicating element where a suitable phase comparator may be connected
3.5 phase comparator
apparatus which indicates the phase relationship between the connecting points of two VPIS
3.6 nominal voltage ( U n )
suitable approximate value of voltage used to identify a system or device
[IEV 601-01-21, modified]
NOTE 1 The nominal voltage of the VPIS is the parameter associated with its clear indication. VPIS may have one nominal voltage U n , or a nominal voltage range. Limit values of the nominal voltage range are named U nmin and U nmax .
NOTE 2 In this standard, the nominal voltage of a three-phase system is the normal phase-to-phase voltage. The nominal voltage of a single-phase system is the normal voltage between lines.
3.7 voltage limiting device
protective device that limits the voltage at the output terminal of the coupling element in the
case of insulation failure