GB/T 21429-2008 (English Version) Composite insulators.Hollow insulators for use in outdoor and indoor electrical equipment.Definitions,test methods,acceptance criteria and design recommendations

Standard No.: GB/T 21429-2008
Language: Chinese, Available in English version
Release Date: 2008
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Latest: GB/T 21429-2008

Scope: This standard applies to hollow composites consisting of a load-bearing insulating tube made of resin-impregnated fibers, an umbrella cover (external to the insulating tube) made of an elastic material (such as silicone rubber or ethylene-propylene rubber), and metal fittings at both ends of the insulating tube. Insulators (hereinafter referred to as "insulators"). Insulators as defined in this standard are used internally with or without pressure. They are used for outdoor or indoor electrical equipment operating on AC voltages with a rated voltage higher than 1000V and a frequency not higher than 100Hz or DC equipment with a rated voltage higher than 1500V. The purpose of this standard is to: — define terms used; — specify test methods; — specify acceptance criteria. This standard does not specify the impulse voltage or power frequency voltage for the type test or pollution test, because the withstand voltage is not a characteristic of the insulator itself, but a characteristic of the electrical equipment of which the insulator is finally a part.

GB/T 21429-2008 Referenced Document

GB 1984-2003 High-voltage alternating-current circuit-breakers
GB 8287.1-1998 High voltage post insulators of ceramic material. Part 1: Technical specification
GB/T 11020-1989 Test methods for the determination of the flammability of solid electrical insulating materials when exposed to an igniting source
GB/T 11022-1999 Common specifications for high-voltage switchgear and controlgear standards
GB/T 1182-1996 Geometrical tolerancing--Generalities, definitions, indications on drawings
GB/T 16927.1-1997 High-voltage test techniques. Part 1: General test requirements
GB/T 19519-2004 Composite insulators for a.c.overhead lines with a nominal voltage greater than 1000V---Definitions,test methods and acceptance criteria
GB/T 4585-2004 Artificial pollution tests on high-voltage insulators to be used on a.c systems
IEC 60068-2-17:1994 Basic environmental testing procedures - Part 2: Tests - Test Q: Sealing
IEC 60660:1999 Insulators - Tests on indoor post insulators of organic material for systems with nominal voltages greater than 1000 V up to but not including 300 kV
IEC 61166:1993 High-voltage alternating current circuit-breakers; guide for seismic qualification of high-voltage alternating current circuit-breakers
IEC 62155:2003 Hollow pressurized and unpressurized ceramic and glass insulators for use in electrical equipment with rated voltages greater than 1000 V
ISO 3452:1984 Non-destructive testing; Penetrant inspection; General principles

2008 GB/T 21429-2008 Composite insulators.Hollow insulators for use in outdoor and indoor electrical equipment.Definitions,test methods,acceptance criteria and design recommendations