IEC 60694:2002 pdf download

IEC 60694:2002 pdf download.Common specifications for high-voltage switchgear and controlgear standards
1 General
1.1 Scope
This International Standard applies to a.c. switchgear and controlgear, designed for indoor and outdoor installation and for operation at service frequencies up to and including 60 Hz on systems having voltages above 1 000 V. This standard applies to all high-voltage switchgear and controlgear except as otherwise specified in the relevant IEC standards for the particular type of switchgear and controlgear.
1.2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All normative documents are subject to revision, and 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. Members of IEC and ISO maintain registers of currently valid International Standards. IEC 60034-1:1996, Rotating electrical machines – Part 1: Rating and performance IEC 60038:1983, IEC standard voltages IEC 60050(131):1978, International Electrotechnical Vocabulary (IEV) – Chapter 131: Electric and magnetic circuits IEC 60050(151):1978, International Electrotechnical Vocabulary (IEV) − Chapter 151: Electrical and magnetic devices IEC 60050(191):1990, International Electrotechnical Vocabulary (IEV) − Chapter 191: Depen- dability and quality of service IEC 60050(301):1983, International Electrotechnical Vocabulary (IEV) – Chapter 301: General terms on measurements in electricity IEC 60050-351:1998, International Electrotechnical Vocabulary (IEV) – Part 351: Automatic control IEC 60050(441):1984, International Electrotechnical Vocabulary (IEV) − Chapter 441: Switchgear, controlgear and fuses IEC 60050(446):1983, International Electrotechnical Vocabulary (IEV) – Chapter 446: Electrical relays
IEC 60376:1971, Specification and acceptance of new sulphur hexafluoride IEC 60393-1:1989, Potentiometers for use in electronic equipment – Part 1: Generic specification IEC 60417 (all parts), Graphical symbols for use on equipment IEC 60445:1999, Basic and safety principles for man-machine interface, marking and identification – Identification of equipment terminals and of terminations of certain designated conductors, including general rules for an alphanumeric system IEC 60480:1974, Guide to the checking of sulphur hexafluoride (SF 6 ) taken from electrical equipment IEC 60485:1974, Digital electronic d.c. voltmeters and d.c. electronic analogue-to-digital converters IEC 60502-1:1997, Power cables with extruded insulation and their accessories for rated voltages from 1 kV (U m = 1,2 kV) up to 30 kV (U m = 36 kV) – Part 1: Cables for rated voltages of 1 kV (U m = 1,2 kV) and 3 kV (U m = 3,6 kV) IEC 60507:1991, Artificial pollution tests on high-voltage insulators to be used on a.c. systems IEC 60512-2:1985, Electromechanical components for electronic equipment; basic testing procedures and measuring methods – Part 2: General examination, electrical continuity and contact resistance tests, insulation tests and voltage stress tests IEC 60529:1989, Degrees of protection provided by enclosures (IP code) IEC 60617, Graphical symbols for diagrams IEC 60669-1:1998, Switches for household and similar fixed-electrical installations – Part 1: General requirements IEC 60721, Classification of environmental conditions IEC 60730-2-9:1992, Automatic electrical controls for household and similar use – Part 2: Particular requirements for temperature sensing controls IEC 60730-2-13:1995, Automatic electrical controls for household and similar use – Part 2: Particular requirements for humidity sensing controls IEC 60815:1986, Guide for the selection of insulators in respect of polluted conditions
2.1 Normal service conditions
2.1.1 Indoor switchgear and controlgear a) The ambient air temperature does not exceed 40 °C and its average value, measured over a period of 24 h, does not exceed 35 °C. The minimum ambient air temperature is −5 °C for class “minus 5 indoor”, −15 °C for class “minus 15 indoor” and −25 °C for class “minus 25 indoor”. b) The influence of solar radiation may be neglected. c) The altitude does not exceed 1 000 m. d) The ambient air is not significantly polluted by dust, smoke, corrosive and/or flammable gases, vapours or salt. e) The conditions of humidity are as follows: – the average value of the relative humidity, measured over a period of 24 h, does not exceed 95 %; – the average value of the water vapour pressure, over a period of 24 h, does not exceed 2,2 kPa; – the average value of the relative humidity, over a period of one month, does not exceed 90 %; – the average value of the water vapour pressure, over a period of one month, does not exceed 1,8 kPa. For these conditions, condensation may occasionally occur. NOTE 1 Condensation can be expected where sudden temperature changes occur in periods of high humidity. NOTE 2 To withstand the effects of high humidity and condensation, such as breakdown of insulation or corrosion of metallic parts, switchgear designed for such conditions and tested accordingly should be used. NOTE 3 Condensation may be prevented by special design of the building or housing, by suitable ventilation and heating of the station or by the use of dehumidifying equipment.