GB/T 22264.6-2022Mounted digital display electric measuring instruments—Part 6: Special requirements for insulation resistance meters (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.

This document is part 6 of GB/T 22264 "Mounted Electrical Measuring Instruments with Digital Display". GB/T 22264 has issued the following part.

--- Part 1: Definitions and general requirements;

--- Part 2: Special requirements for ammeters and voltmeters;

--- Part 3: Special requirements for power meters and reactive power meters;

--- Part 4: Special requirements for frequency tables;

--- Part 5: Particular requirements for phase meters and power factor meters;

--- Part 6: Special requirements for insulation resistance meters;

--- Part 7: Special requirements for multi-function instruments;

--- Part 8: Test methods.

This document replaces GB/T 22264.6-2009 "Mounted digital display electrical measuring instruments - Part 6: Special requirements for insulation resistance meters beg". Compared with GB/T 22264.6-2009, except for structural adjustment and editorial changes, the main technical changes are as follows.

--- Changed the scope and added "This document is applicable to newly manufactured DC 750V and AC 690V and below, the nominal frequency is Installed digital display insulation resistance meter for measuring insulation resistance in 50Hz or 60Hz power distribution system" (see Section 1 Chapter, Chapter 1 of the 2009 edition);

--- Increase the standard power value, specify the nominal voltage, nominal frequency and its range (see 5.1);

--- Deleted the definition of measuring terminal, nominal output voltage and nominal current in the 2009 edition (see 3.2, 3.3, 3.4 of the 2009 edition);

--- Added the definition of rated current and rated output voltage (see 3.3, 3.4);

--- Increase the standard power value, specify the nominal voltage, nominal frequency and its range (see 5.1);

--- Increased the nominal use range limits and allowable changes in Table 1 (see Table 1), and clarified the insulation resistance used in IT systems Nominal use range limit and allowable variation;

---Changed the recommended accuracy level (see 4.2, 5.4 of the 2009 edition);

--- Changed the technical requirements of "self-heating" (see 5.5.1, 7.2.1 of the 2009 edition);

--- Changed the technical requirements of "temperature rise" (see 5.5.2, 7.2.1 of the 2009 edition);

---Change "output interface" to "input and output interface" (see 5.5.5, 7.2.5 of the 2009 edition);

--- Changed the technical requirements of "response time" (see 5.5.7, 7.2.7 of the 2009 edition);

--- Added "Special electrical requirements for insulation resistance meter" (see 5.5.9);

---Changed the "accuracy performance requirements" (see 5.6, 7.3 of the 2009 edition);

--- Changed the immunity test requirements for electromagnetic disturbances (see 5.7.1, 7.4 of the 2009 edition), and added Table 2 used in IT systems The electromagnetic compatibility test items and requirements of the insulation resistance meter;

--- Added radio interference suppression requirements (see 5.7.2);

--- Change "mechanical requirements" to "structural requirements", and add special requirements for insulation resistance meters used in IT systems (see 5.8, 7.5 of the 2009 edition);

--- Changed the "average life" technical requirements, and changed "average life" to "reliability" (see 5.10, 7.7 of the 2009 edition);

--- Added "test items and recommended sequence" (see Appendix B).

Introduction

Installed digital display electrical measuring instruments are installed in various distribution cabinets and distribution boxes, and are widely used in industrial and mining enterprises, electric power, metallurgy, chemical industry, In fields such as energy, medical care, and transportation, the application scenarios continue to expand. GB/T 22264 series standards have been promulgated and used for more than 10 years.

And market changes, the standard can no longer adapt to the development of technology and user needs.

GB/T 22264 aims to standardize the technology of installed digital display electrical measuring instruments by combining the latest product technology and user needs at home and abroad.

Specifications and safety requirements, and put forward corresponding test methods, to provide a product specification for manufacturers and users of such electrical measuring instruments The specification reflects most of the requirements of the product ordering technical specifications.

GB/T 22264 is proposed to be composed of the following 8 parts.

--- Part 1: Definitions and general requirements. The purpose is to establish the definitions and common enquiries.

--- Part 2: Special requirements for ammeters and voltmeters. The purpose is to develop special requirements for ammeters and voltmeters.

--- Part 3: Special requirements for power meters and reactive power meters. The purpose is to formulate special requirements for power meters and reactive power meters.

--- Part 4: Special requirements for frequency tables. The purpose is to develop special requirements for frequency tables.

--- Part 5: Special requirements for phase meters and power factor meters. The purpose is to formulate special requirements for phase meters and power factor meters.

--- Part 6: Special requirements for insulation resistance meters. The purpose is to formulate special requirements for insulation resistance meters.

--- Part 7: Special requirements for multi-function instruments. The purpose is to formulate special requirements for multi-function instruments.

--- Part 8: Test methods. The purpose is to standardize the test methods for installed digital display electrical measuring instruments.

In recent years, the international safety requirements for products have become more and more stringent. This revised standard combines IEC 61010-1:2010, IEC 61557-8:2014, IEC 61326-2-4:2012 and GB/T 17215.211-2021, modified the safety-related content, clarified the terms of use, and mentioned High product safety performance.

1 Scope

This document specifies the product classification, classification and compliance, technical requirements, information, general signs and Symbols, inspection rules and packaging, storage and transportation.

This document applies to newly manufactured power distribution systems below 750V DC and 690V AC with a nominal frequency of 50Hz or 60Hz.

Installed digital display insulation resistance meter for measuring insulation resistance in the system; also suitable for digital insulation resistance meter with analog/digital dual display display section.

This document does not apply to.

--- Insulation resistance meters with direct acting analog indication only;

---Portable digital display insulation resistance meter;

---There is also a national standard (or industry standard) special-purpose digital display insulation resistance meter.

2 Normative references

The contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, dated references For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document.

GB/T 22264.1-2022 Mounted digital display electrical measuring instruments Part 1: Definitions and general requirements

IEC 61557-8:2014 Electrical safety protection measures in low-voltage power distribution systems below AC 1000V and DC 1500V

3 Terms and Definitions

The following terms and definitions defined in GB/T 22264.1-2022 apply to this document.