GB/T 14810-2014
Alternating current switches for rated voltages of 72.5 kV and above (English Version)

Standard No.

GB/T 14810-2014

Language

Chinese, Available in English version

Release Date

2014

Published By

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China

Latest

GB/T 14810-2014

Replace

GB/T 14810-1993

Scope

This standard applies to three-pole AC load switches with rated voltage of 72.5 kV and above, rated frequency of 50 Hz, with making and breaking current ratings, for indoor and outdoor installation. This standard also applies to the operating mechanism of the load switch and its auxiliary equipment. The main objective of this standard is to determine the requirements for load switches used in transmission systems. The general-purpose load switch designed for this purpose meets the following operating requirements:--Continuously carry the rated current;--Carry the short-circuit current within the specified time;--Switch active load current; Open and close the charging current of no-load cables, overhead lines or busbars;--open and close closed-loop circuits;--close short-circuit current. A higher objective of this standard is to determine the requirements for dedicated and special purpose load switches used in transmission systems. The dedicated load switch should meet one or more of the above operating conditions. In addition to meeting one or more operating conditions of general load switches, special-purpose load switches should also meet one or more of the following operating conditions: --opening and closing a single capacitor bank;--opening and closing a back-to-back capacitor bank;- - opening and closing parallel reactors, including switching secondary side or tertiary winding side shunt reactors from the primary side of the transformer; - operating conditions requiring increased operating cycles; - in non-effectively grounded neutral point systems Switching under ground fault conditions.

GB/T 14810-2014 Referenced Document

• GB 1984-2014 High-voltage alternating-current circuit-breakers*， 2014-06-24 Update
• GB 1985-2014 High-voltage alternating-current disconnectors and earthing switches*， 2014-06-24 Update
• GB 3804-2004 High-voltage alternating-current switches for rated voltage above 3.6 kV and less than 40.5 kV
• GB/T 11022-2011 Common specifications for high-voltage switchgear and controlgear standards
• GB/T 2900.20-1994 Electrotechnical terminology.High-voltage switchgear
• GB/T 29489-2013 Inductive load switching for high-voltage alternating current switchgear and controlgear
• GB/T 311.1 Insulation co-ordination.Part 1:Definitions,principles and rules
• GB/T 311.2 Insulation co-ordination.Part 2:Application guide
• GB/T 311.3 Insulation co-ordination—Part 3: Procedures for high-voltage direct current (HVDC) converter stations*， 2017-09-29 Update
• GB/T 311.4 Insulation co-ordination.Part 4:Computational guide to insulation co-ordination and modeling of electrical networks
• GB/T 311.6 Voltage measurement by means of standard air gaps
• GB/T 4109-2008 Insulated bushings for alternating voltages above 1000V
• GB/T 4473-2008 Synthetic testing of High-voltage alternating current circuit-breakers
• GB/T 7354-2003 Partial discharge measurements
• GB/T 762-2002 Standard current ratings

GB/T 14810-2014 history

• 2014 GB/T 14810-2014 Alternating current switches for rated voltages of 72.5 kV and above
• 1993 GB/T 14810-1993 AC high voltage switches for rated voltages of 110kV and above