GB/T 25738-2024Technical guideline for motor commissioning in nuclear power plants (English PDF)

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1: Structure and drafting rules for standardization documents". Drafting is required.

This document replaces GB/T 25738-2010 "Technical Guidelines for Commissioning of Electric Motors in Nuclear Power Plants".

In addition to structural adjustments and editorial changes, the main technical changes are as follows:

a) The scope of application has been changed (see Chapter 1, Chapter 1 of the 2010 edition);

b) The definition of nuclear safety-grade motor has been changed (see 3.2, 3.2 of the 2010 edition);

c) Added the requirements for the completion of motor installation (see 4.1.3);

d) The provisions for checking lubricating oil have been changed [see 4.2.2 e) and 4.2.2 e) of the 2010 edition];

e) Added the requirement to check the current transformer (CT) wiring [see 4.4.1 g)];

f) Added the requirement to check the neutral point connection [see 4.4.1 h)];

g) Added the requirement to inspect the inverter [see 4.4.1 k)];

h) Added requirements for no-load starting voltage drop measurement (see 4.4.3.1);

i) Added requirements for no-load starting of motors with frequency converters (see 4.4.3.7);

j) Added requirements for measuring the voltage drop when starting with load (see 4.4.4.2);

k) Change "low-voltage motor" to "motor with rated voltage below 1 000 V" and change "high-voltage motor" to "motor with rated voltage below 1 000 V". "Motors with a voltage of 1 000 V and above" (see 4.4.3.2, 4.4.4.3, 4.4.4.4, 2010 edition 4.4.3.2, 4.4.4.3, 4.4.4.4);

The normative appendix "Quality Appraisal and Special Tests for Typical Nuclear Safety-Grade Motors" (see Appendix A of the 2010 edition) has been deleted.

1 Scope

This document specifies the commissioning conditions, commissioning methods, judgment criteria, and report contents for AC asynchronous motors in nuclear power plants.

This document applies to the commissioning of AC asynchronous motors in nuclear power plants.

2 Normative references

The contents of the following documents constitute the essential clauses of this document through normative references in this document.

For referenced documents without a date, only the latest version (including all amendments) applies to this document.

GB/T 755 Ratings and performance of rotating electrical machines

GB/T 1032 Test methods for three-phase asynchronous motors

GB/T 10068 Mechanical vibration of motors with a shaft center height of 56 mm or more - Measurement, evaluation and limits of vibration

GB/T 14048.12 Low-voltage switchgear and controlgear Part 4-3: Contactors and motor starters for non-motor loads AC semiconductor controllers and contactors

GB 50150 Electrical Equipment Acceptance Test Standard for Electrical Installation Engineering

3 Terms and Definitions

The following terms and definitions apply to this document.

4 Debugging