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GB/T 34925-2017On-site inspections method of a.c. circuit systems for 110 kV substations on plateau (English PDF)

高原110 kV变电站交流回路系统现场检验方法

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

November 1, 2017

Implementation date

May 1, 2018

Scope

GB/T 34925-2017 is the English-translated version of 高原110 kV变电站交流回路系统现场检验方法.

GB/T 34925-2017 is the Chinese standard "On-site inspections method of a.c. circuit systems for 110 kV substations on plateau". Its scope clause reads: This standard specifies the content, methods and requirements of on-site inspection of AC circuit of 110kV substation in high altitude area.

This standard applies to the altitude of 1000m ~ 5000m area, new or renovation of conventional substation project, guide the exchange before the operation of the circuit On-site inspection Digital substation project can be used for reference. Its clauses include terms and definitions.

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Document preview — GB/T 34925-2017

National Standard of the People's Republic of China

ICS: 29.020
Classification: K 04

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Preface
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 test conditions
4.1 Test environmental conditions
4.2 Test power supply benchmark conditions and tolerances
4.3 Substation AC circuit test conditions
4.4 The main test equipment
5 pilot project and test sequence
5.1 Test Project
5.2 Test sequence
6 test methods
6.1 General
6.2 a circuit check
6.3 secondary circuit inspection
6.4 AC current loop of the system test
6.5 AC voltage loop system test
6.6 Inspection Process Requirements
Appendix A (informative) DC current loop resistance test record table
Appendix B (informative) voltage secondary circuit DC resistance test record
Appendix C (Normative) Transformer short-circuit impedance estimation method
Appendix D (Normative) AC circuit inspection diagram
Appendix E (informative) AC current loop system test record table
Appendix F (Normative) AC current loop verification current conversion method
Appendix G (informative) AC voltage loop system test records Table
Appendix H (Normative) AC voltage loop test secondary voltage conversion method
Appendix I (Normative) Substation AC circuit system inspection process
References

1 Scope

This standard specifies the content, methods and requirements of on-site inspection of AC circuit of 110kV substation in high altitude area.

This standard applies to the altitude of 1000m ~ 5000m area, new or renovation of conventional substation project, guide the exchange before the operation of the circuit

On-site inspection Digital substation project can be used for reference.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version applies to this article

Pieces. For undated references, the latest edition (including all amendments) applies to this document.

GB/T 16927.1 high voltage test techniques - Part 1. General definitions and test requirements

GB/T 16927.2 high voltage test techniques - Part 2. Measurement system

GB/T 20626.1 special environmental conditions Highland Electrical and Electronic Products Part 1. General technical requirements

GB/T 20645 Special environmental conditions Low voltage electrical equipment for use on the plateau

GB 50150 electrical installations installation of electrical equipment handover test standards

DL/T 474 (all parts) site insulation test implementation guidelines

3 Terms and definitions

The following terms and definitions apply to this document.

3.1 AC circuit

Substation AC current loop and AC voltage loop.

3.2 AC current loop

Substation AC current loop and AC secondary current loop.

AC primary current circuit refers to the main transformer, circuit breakers, disconnectors, bus, current transformer primary winding and other equipment and circuit order

Connection combination.

AC secondary current circuit refers to the current transformer secondary winding, secondary cable, terminal box, screen cabinet terminal block, cable, gateway measurement, following

Electrical protection and monitoring devices such as secondary equipment and loop the orderly connection portfolio.

3.3 AC voltage circuit

Substation AC primary voltage and AC secondary voltage circuits.

Exchange a voltage circuit refers to the main transformer, circuit breakers, disconnectors, bus, voltage transformer primary winding and other equipment and circuits are

Sequence connection combination.

AC secondary voltage circuit refers to the voltage transformer secondary winding, secondary cable, terminal box, cabinet terminal block, cable, relay protection

And monitoring devices such as secondary equipment and loop the orderly connection combination.

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 20 pages — is available in the English PDF.

Referenced standards

Cited by

GB/T 37137-2018On-site inspections method of a.c.circuit systems for 220 kV substations on plateau

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GB/T 13869-2026|GB/T 24114.2-2026|GB/T 33589-2026|GB/T 33592-2026|GB/T 33593-2026|GB/T 33603-2026

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