GB/T 46899.1-2025Electrical energy meters - Test equipment, techniques and procedures - Part 1: Stationary meter test units (MTUs) (English PDF)

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents".

Drafting.

This document is Part 1 of GB/T 46899 "Test Equipment, Techniques and Procedures for Electricity Meters". GB/T 46899 has been published as...

Part 2.

---Part 1: Test apparatus for stationary energy meters (MTUs).

This document is equivalent to IEC 62057-1:2023 "Test equipment, techniques and procedures for electricity meters - Part 1: Test equipment for stationary electricity meters".

MTUs (Measuring Units) are used for testing.

The following minimal editorial changes have been made to this document.

---Note a has been added to Table 1;

---Corrected the table numbering in Table A.1 and corrected the redundant entries for "Xi" in Table D.9;

---The format of Table 16 has been adjusted;

---Corrected "10000/kW·h" in D.4.4 to "10000×1/(kW·h)";

---Corrected the unit of instrument constant in D.4.3 from "imp/kW·h" to "1/(kW·h)";

---Corrected the working voltage range "(-10%~15%)" in Table F.1 to "(-10%~15%)Un", and the frequency working range.

"fn±2%" is "(1±2%)fn";

---Corrected the frequency "50Hz±1%/60Hz±1%" in Table E.1 to "(1±1%)50Hz/(1±1%)60Hz", Table F.2 the voltage range "230V±10%" is "(1±10%)230V".

Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents.

This document was proposed by the China Machinery Industry Federation.

This document is under the jurisdiction of the National Technical Committee on Standardization of Electrical Instruments and Meters (SAC/TC104).

Introduction

GB/T 46899 aims to specify the relevant technical requirements for test equipment, test techniques, and test procedures for electricity meters. GB/T 46899 is proposed...

It consists of the following two parts.

---Part 1: Test Apparatus for Fixed Energy Meters (MTUs). The purpose is to specify the testing apparatus for energy meters permanently installed in a laboratory.

Type testing, acceptance testing, and verification testing of stationary energy meter test units (MTUs) for testing and calibration.

---Part 2: Portable Instrument Test Unit (PMTU). The purpose is to specify newly manufactured portable test units for field use.

Technical requirements for instrument testing equipment (PMTU).

Electricity meter testing equipment, technology and procedures Part 1: Test Apparatus for Fixed Energy Meters (MTUs)

1 Scope

This document applies to fixed energy meter testing equipment permanently installed in a laboratory for the testing and calibration of energy meters.

(MTU), particularly for type testing, acceptance testing, and verification testing of equipment. This document covers automation for indoor laboratories.

MTU requirements, applicable to newly manufactured MTUs, for use with AC voltage not exceeding 600V (line to neutral) and frequency of Testing of electricity meters in 50Hz or 60Hz electrical networks.

If the electricity meter is used for a system voltage not specified in this document, the special requirements for the MTU shall be negotiated between the manufacturer and the purchaser.

This document also defines the types of tests for the MTU, including type tests, routine tests, acceptance tests, and commissioning tests.

This document does not apply to.

---Portable reference energy meters and portable power sources;

---Electricity meter;

---Data interface of the electricity meter and test procedures for the data interface;

---Instrument connected to the MTU;

---Personal computers provided with MTU.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.

For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.

This document.

GB/T 2893.1-2013 Graphical symbols, safety colors, and safety signs—Part 1: Design principles of safety signs and markings Then (ISO 3864-1:2011, MOD) GB/T 4798.2-2021 Classification of Environmental Conditions - Classification of Environmental Parameter Groups and Grading of Severity - Part 2: Transport and Loading Unloading (IEC 60721-3-2:2018, IDT) GB 4824-2019 Limits and methods of measurement for radio frequency interference characteristics of industrial, scientific and medical devices (CISPR 11.2015) IDT) GB/T 5465.2-2023 Graphical symbols for electrical equipment – Part 2: Graphical symbols (IEC 60417 Database.

2023-03, IDT)

GB/T 16273 (all parts) Graphical symbols for equipment [ISO 7000 (all parts)] GB/T 16935.1-2023 Insulation Coordination of Equipment in Low-Voltage Power Supply Systems - Part 1: Principles, Requirements and Tests (IEC 60664-1:2020, IDT) GB/T 17045-2020 General Part of Protective Devices and Equipment for Electric Shock (IEC 61140:2016, IDT) GB/T 17215.231-2021, Electrical measuring equipment (AC) - General requirements, tests and test conditions - Part 31: Product safety requirements Summation test (IEC 62052-31:2015, IDT) GB/T 18268.1-2025 Electromagnetic compatibility requirements for electrical equipment for measuring, control and laboratory use – Part 1: General requirements (IEC 61326-1:2020, IDT) GB/T 42125.1-2024 Safety requirements for electrical equipment for measuring, control and laboratory use – Part 1: General requirements (IEC 61010-1:2016, IDT)