1 Overview
1.1 Scope
This standard applies to a.c. switchgear and controlgear designed for indoor and outdoor installation and for operation at service frequencies up to and including 50 Hz on systems having voltages above 3 kV.
This standard applies to all high-voltage switchgear and controlgear except as otherwise specified in the relevant standards for the particular type of switchgear and controlgear.
NOTE For the use of this standard, generally, the voltage range of high voltage switchgear is the rated voltage of 3.6 kV. The rated voltage range of medium voltage switchgear is usually 3.6 kV~63 kV; the rated voltage range of high voltage switchgear is 72.5 kV~252 kV; the rated voltage range of extra high voltage switchgear is 363 kV~800 kV; the rated voltage range of ultra high voltage switchgear is above 1100 kV.
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.
GB/T 156-2007 Standard voltage (IEC 60038: 2002, MOD)
GB 311.1-1997 Insulation coordination for high-voltage transmit and transform equipment (neq iec 71-1: 1993)
GB/T 3112 Insulation co-ordination C Part 2: Application guide of insulation co-ordination for high voltage transmission and distribution Equipment
GB 755-2008 Rotating electrical machines - Rating and performance
GB/T 762-2002 Standard current ratings
GB 2099.1-2008 Plugs and socket-outlets for household and similar purposes - Part 1: General requirements (IEC 60884-1: 2006, MOD)
GB/T 2423 Environmental testing Part 2 (ICE 60068-2: (all parts), IDT)
GB/T 2536-1990 Transformer oils (neg ICE 60296: 1982)
GB/T 2900.13-2008 Electrotechnical terminology - Dependability and quality of service (IEC 60050-191: 1990, IDT)
GB/T 2900.17- 2009 Electrotechnical terminology - Measuring relays
GB/T 2900.18- 2009 Electric Terminology - Low-voltage Apparatus
GB/T 2900.19-1994 Electric Terminology - High-voltage Test Technology and Insulation Coordination (neg IEC 60071-1, 1993)
GB/T 2900.20-1994 Electric Terminology - High-voltage Switchgears (neq IEC 60071-1: 1993)
GB/T 2900.33-2004 Electrotoechnical terminology—Power electronics (IEC 60050-551: 1998, MOD)
GB/T 2900.36-2003 Electrotechnical terminology—Electric traction (IEC 60050-811: 1991, MOD)
GB/T 2900.56-2008 Electrotechnical terminology - Control technology (IEC 60050-351: 2006, IDT)
GB/T 2900.59-2008 Electrotechnical terminology - Generation transmission and distribution of electricity C Substations (IEC 60050-605: 1993, MOD)
GB/T 2900.71-2008 Electrotechnical terminology - Electrical installations (IEC 60050-826: 2004, IDT)
GB/T 3906-2006 Alternating-current metal-enclosed switchgear and controlgear for rated voltages above 3.6 kV and up to and including 40.5 kV (IEC 62271-200: 2003 MOD)
GB/T 4025-2003 Basic and safety principles for man-machine interface, marking and identification--Coding principles for indication Devices and actuators (IEC 60073-1996, IDT)
GB/T 4026-2004 Basic and safety principles for man-machine interface, marking and identification of equipment terminals and terminations of certain designated conductors, including general rules for an alphanumeric system (IEC 60445: 1999, IDT)
GB/T 4208-2008 Shielding Protection Ratings (IP Code) (IEC 60529: 2001, IDT)
GB/T 4210-2001 Electrotechnical terminology--Electromechanical components for electronic equipment (IEC 60050-581: 1978, IDT)
GB/T 4585- 2004 Artificial squalidity test methods for AC system's high-voltage insulator - Solid lamination method (IEC 60507: 1991, IDT)
GB/T 4728 Series Graphical Symbols for Electrical Diagrams (IEC 60617, IDT)
GB/T 4796-2008 Classification of environmental conditions of electric and electronic products - Part 1: Environmental parameters and their severities (IEC 60721-1: 2002, IDT)
GB/T 4798 Series Application Environment Conditions for Electric and Electronic Products (IEC 60721-3 (all parts), MOD)
GB/T 4824-2004 Industrial, scientific and medical (ISM) radio-frequency equipment Electromagnetic disturbance characteristics limits and methods of measurement (CISPR 11: 2003 IDT)
GB/T 5013 Series Rubber insulated cables of rated voltages up to and including 450/750 V (IEC 60245 (all parts), IDT)
GB/T 5023 Series Polyvinyl chloride insulated cables of rated voltages up to and including 450/750V (IEC 60227 (all parts), IDT)
GB/T 5169 Series Fire hazard testing for electric and eletronic products (IEC 60695-1 (all parts), IDT, IEC 60695-7 (all parts), IDT)
GB/T 5465.2-2008 Graphical symbols for use on electrical equipment - Part 2:Graphical symbols (IEC 60417: 2007, IDT)
GB/T 5732-1985 Fixed resistors for use in electronic equipment; Part4: Sectional specification: Fixed power resistors (idt IEC 60115-4: 1982)
GB/T 6113 Series Specification for radio disturbance and immunity measuring apparatus and methods (CISPR 16-1 (all parts), IDT)
GB/T 7349-2002 Methods of measurement of radio interference from high voltage overhead power transmission line and substation (CISPR 18-2, IDT)
GB/T 7354-2003 Partial discharge measurement (IEC 60270: 2001, IDT)
GB/T 7676.1-1998 Direct acting indicating analogue electrical measuring instruments and their accessories. Part 1: Definition and general requirements common to all parts (idt IEC 60051-1: 1997)
GB/T 7676.2-1998 Direct acting indicating analogue electrical measuring instruments and their accessories. Part 2: Special requirements for ammeters and voltmeters (idt IEC 60051-2: 1984)
GB/T 7676.4-1998 Direct acting indicating analogue electrical measuring instruments and their accessories. Part 4: Special requirements for frequency meters (idt IEC 60051-2: 1984)
GB/T 7676.5-1998 Direct acting indicating analogue electrical measuring instruments and their accessories. Part 5: Special requirements for phase meters, power factor meters and synchroscopes (idt IEC 60051-5: 1985)
GB/T 8905-1996 Guide Rules of Gas Management and Inspection for Sulfur Hexafluoride Electrical Equipment (neq IEC 60480: 1974)
GB/T 9637-2001 Electrotechnical terminology--Magnetic materials and components
GB/T 10681-2009 Tungsten filament lamps for domestic and similar general lighting purposes—Performance requirements (IEC 60064: 2005, NEQ)
GB/T 10682-2010 Double-capped fluorescent lamps—Performance specifications (IEC 60081: 2005, NEQ)
GB/T 11021-2007 Electrical insulation - Thermal classification (IEC 60085:2004, IDT)
GB/T 11287-2000 Electrical relays--Part 21: Vibration, shock, bump and seismic tests on measuring relays and protection equipment--Section one: Vibration tests (sinusoidal) (IEC 60255-21-1: 1988, IDT)
GB/T 11918-2001 Plugs, socket-outlets and couplers for industrial purposes--Part 1:General requirements (IEC 60309-1: 1999, IDT)
GB/T 11919-2001 Plugs, socket-outlets and couplers for industrial purposes--Part 2: Dimensional interchangeability requirements for pin and contact-tube accessories (IEC 60309-2: 1999, IDT)
GB/T 12022-2006 Industrial sulfur hexafluoride (IEC 60376: 1971, MOD)
GB/T 12706.1-2008 Power cables with extruded insulation and their accessories for rated voltages from 1kV (Um=1.2kV) up to 35kV (Um=40.5kV) - Part 1: Cables for rated voltage of 1kV (Um=1.2kV) and 3kV (Um=3.6kV) (IEC 60502-1: 2004, MOD)
GB/T 13539.2-2008 Low-voltage fuses - Part 2: Supplementary requirements for fuses for use by authorized persons (fuses mainly for industrial application) - Examples of standardized systems of fuses A to I (IEC 60269-2: 2006, IDT)
GB/T 13540-2009 Seismic qualification for high-voltage switchgear and controlgear (IEC 62271-2: 2003, MOD)
GB/T 14048.2-2008 Low-voltage switchgear and controlgear - Part 2: Circuit-breakers (IEC 60947-2: 2006, IDT)
GB/T 14048.3-2008 Low-voltage switchgear and controlgear - Part 3:Switches disconnectors switch-disconnectors and fuse-combination units (IEC 60947-3: 2005, IDT)
GB/T 14048.4-2010 Low-voltage switchgear and controlgear—Part 4-1:Contactors and motor-starters—Electromechanical contactors and motor-starters(Including motor protector) (IEC 60947-4-1: 2009-09 Ed. 3. 0, IDT)
GB/T 14048.5-2008 Low-voltage switchgear and controlgear - Part 5-1:Control circuit devices and switching element - Electromechanical control circuit devices (IEC 60947-5-1: 2003, MOD)
GB/T 14048.6-2008 Low-voltage switchgear and controlgear - Part 4-2: Contactors and motor-starters AC semiconductor motor controllers and starters (including soft-starter) (IEC 60947-4-2: 2002, IDT)
GB/T 14048.7-2006 Low-voltage switchgear and controlgear - Part 7-1: Ancillary equipment - Terminal blocks for copper conductors (IEC 60947-7-1: 2002, MOD)
GB/T 14048.8-2006 Low-voltage switchgear and controlgear - Part 7-2: Ancillary equipment - Protective conductor terminal blocks for copper conductors (IEC 60947-7-2: 2002, MOD)
GB/T 14536.10-2008 Automatic electrical controls for household and similar use - Particular requirements for temperature sensing controls (IEC 60730-2-9: 2004, IDT)
GB/T 14536.15-2008 Automatic electrical controls for household and similar use - Particular requirements for humidity sensing controls (IEC 60730-2-13: 2006, IDT)
GB/T 14598.15-1998 Electrical relays Part 8: Thermal electrical relays (idt IEC 60255-8: 1990)
GB/T 15298-1994 Potentiometers for use in electronic equipment-Part 1: Generic specification (idt IEC 60393-1: 1989)
GB/T 15544-1995 Short-circuit current calculation in three-phase a.c. systems (idt IEC 60909: 1988)
GB/T 16915.1-2003 Switches for houshelod and similar fixed-electrical installations—Part 1: General requirements (IEC 60669-1: 2000, MOD)
GB/T 16927.1- 1997 High-voltage Test Technologies - Part 1: General Test Requirements (eqv IEC 60- 1:1989)
GB/T 17626.1- 2006 Electromagnetic compatibility - Testing and measurement techniques - Overview of immunity tests (IEC 61000-4-1: 2000, IDT)
GB/T 17626.4- 2008 Electromagnetic compatibility - test and measurement technologies - immunity test for electric ringing pulse group (IEC 61000-4-4: 2004 IDT)
GB/T 17626.10- 1998 Electromagnetic compatibility --Testing and measurement techniques --Damped oscillatory magnetic field immunity test (idt IEC 61000-4-18: 1993)
GB/T 17626.11-2008 Electromagnetic compatibility - Testing and measurement techniques - Voltage dips,short interruptions and voltage variations immunity tests (IEC 61000-4-11: 2004, IDT)
GB/T 17626.17-2005 Electromagetic Compatibility—Testing and measurement techniques—Ripple on d.c. input power port immunity test (IEC 61000-4-17: 2002, IDT)
GB/T 17627.1-1998 High-voltage Test Technologies for Low-voltage Electrical Equipment - Part 1: Definitions and Test Requirements (eqv IEC 1180-1: 1992)
GB 17799 (all parts) Electromagnetic compatibility--Generic standards (IEC 61000-6: 1997, IDT)
GB/T 20138-2006 Degrees of protection provided by enclosures for electrical equipment against external mechanical impacts (IK code) (IEC 62262: 2002, IDT)
GB/T 21711.1-2008 Electromechanical elementary relays—Part 1: General and safety requirements (IEC 61810 (all parts), IDT)
IEC 60815:1986 Guide for the selection of insulators in respect of polluted conditions
IEC 61000-5 (all parts) Electromagnetic compatibility (EMC) C Part 5: Installation and
mitigation guidelines
IEC 61634 High-voltage switchgear and controlgear C Use and handling of sulphur hexafluoride (SF6) in high-voltage switchgear and controlgear
IEC 62271-303: 2008 High-voltage switchgear and controlgear C Part 303: Use and handling of sulphur hexafluoride (SF6)
IEC 62063 High-voltage switchgear and controlgear C The use of electronic and associated technologies in auxiliary equipment of switchgear and controlgear
IEC 62326-1 Printed boards C Part 1:Generic specification
2 Normal and Particular Use Conditions
2.1 Overview
Unless otherwise specified, high-voltage switchgear and controlgear, including the operating devices and the auxiliary equipment which form an integral part of them, are intended to be used in accordance with their rated characteristics and the normal service conditions listed in 2.2.
If the actual service conditions differ from these normal service conditions, high-voltage switchgear and controlgear and associated operating devices and auxiliary equipment shall be designed to comply with any special service conditions required by the user (refer to 2.3).
NOTE 1: Appropriate action should also be taken to ensure proper operation under such conditions of other components, such as relays.
NOTE 2: Detailed information concerning classification of environmental conditions is given in GB/T 4798.
2.2 Normal Service Conditions
2.2.1 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 preferred values of minimum ambient air temperature are C5°C, C15°C and C25°C.
b) The influence of solar radiation may be neglected.
c) The altitude does not exceed 1000 m.
d) The ambient air is not significantly polluted by dust, smoke, corrosive and/or flammable gases, vapours or salt. The manufacturer will assume that, in the absence of specific requirements from the user, there are none.
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 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.
f) Vibrations due to causes external to the switchgear and controlgear or earth tremors are insignificant relative to the normal operating duties of the equipment. The manufacturer will assume that, in absence of specific requirements from the user, there are none.
NOTE 4: The interpretation of the term “insignificant” is the responsibility of the user or specifier of the equipment. Either the user is not concerned with seismic events, or his analysis shows that the risk is “insignificant”.
