GB/T 20995-2007 (English Version) PDF

Standard No.: GB/T 20995-2007
Language: Chinese, Available in English version
Release Date: 2007
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Status: Be replaced 2021-07
Replace By: GB/T 20995-2020
Latest: GB/T 20995-2020

Scope: This standard specifies the type test, factory test and option test of thyristor valves. These thyristor valves are suitable for use as components of Static Var Compensation (SVC) for power transmission and distribution systems, namely Thyristor Controlled Reactors (TCR), Thyristor Switched Reactors (TSR) and Thyristor Switched Capacitors (TSC). The requirements of this standard apply both to single valve units (single-phase) and to multiple valve units (multi-phase). Chapters 4 to 7 of this standard describe the type test in detail, that is, the test used to verify whether the valve design meets the specified requirements. Clause 8 outlines factory tests, ie tests used to determine manufacturing quality. Chapters 9 and 10 detail optional tests, that is, additional tests other than type tests and factory tests.

GB/T 20995-2007 Referenced Document

GB 311.1-1997 Insulation co-ordination for high voltage transmission and distribution equipment
GB/T 16927.1-1997 High-voltage test techniques. Part 1: General test requirements
GB/T 16927.2-1997 High-voltage test techniques. Part 2: Measuring systems
GB/T 20990.1-2007 Thyristor valves for high voltage direct current(HVDC)power transmission- Part 1: Electrical testing
GB/T 311.2-2002 Insulation co-ordination Part 2: Application guide for insulation co-ordination for high voltage transmission and distribution equipment
GB/T 7354-2003 Partial discharge measurements

2020 GB/T 20995-2020 Static var compensators(SVC)—Testing of thyristor valves
2007 GB/T 20995-2007 Power electronics for electrical transmission and distribution systems- Testing of thyristor valves for static VAR compensators