IEC 62271-206 pdf download

IEC 62271-206 pdf download.High-voltage switchgear and controlgear – Part 206: Voltage presence indicating systems for rated voltages above 1 kV and up to and including 52 kV
1 General
1.1 Scope This part of IEC 62271 is applicable to voltage presence indicating systems (VPIS) incor- porated in a.c. switchgear and controlgear covered by IEC 62271 -200 or IEC 62271 -201 . 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 61 243-1 , IEC 61 243-2 and IEC 61 243-5 should be used. This standard is also applicable to phase comparators specifically designed for use with VPIS. 1.2 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. IEC 60060-1 , High-voltage test techniques – Part 1: General definitions and test requirements IEC 60068-2-1 4, Environmental testing – Part 2-14: Tests – Test N: Change of temperature IEC 60068-2-75, Environmental testing – Part 2-75: Tests – Test Eh: Hammer tests IEC 60529, Degrees of protection provided by enclosures (IP code) IEC 62271 -1 :2007, High-voltage switchgear and controlgear – Part 1: Common specifications IEC 62271 -200, High-voltage switchgear and controlgear – Part 200: AC metal-enclosed switchgear and controlgear for rated voltages above 1 kV and up to and including 52 kV IEC 62271 -201 , High-voltage switchgear and controlgear – Part 201: AC insulation-enclosed switchgear and controlgear for rated voltages above 1 kV and up to and including 52 kV IEC 61 243-1 , Live working – Voltage detectors – Part 1: Capacitive type to be used for voltages exceeding 1 kV a.c. IEC 61 243-2, Live working – Voltage detectors – Part 2: Resistive type to be used for voltages of 1 kV to 36 kV a.c.
3 Terms and definitions
For the purposes of this document, the following terms and 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 61 243-5) 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 [IEC 60050-601 :1 985, 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
5 Design and construction
5.1 General 5.1.1 Parts of VPIS A VPIS includes – a coupling element; – an indicating element; – a connecting point (optional). Both the coupling and indicating elements are fixed and incorporated in switchgear (see Figure 1 ). 5.1.2 Phase comparison VPIS should allow checking of phase relationship by means of a suitable phase comparator. The characteristics of the phase comparator shall be defined by the manufacturer of the VPIS. 5.1.3 Degree of protection (IP code) Parts of the VPIS which contribute to the switchgear enclosure shall meet the degree of protection defined for the switchgear. If the VPIS includes hazardous parts when in service, it shall provide at least an IP2X degree of protection according to IEC 60529, even when replaceable parts are removed.