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JJF 1701.4-2019 English PDF

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JJF 1701.4-2019: Program of Pattern Evaluation of Instrument Transformers--Part 4: Current Transformers
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Basic data

Standard ID JJF 1701.4-2019 (JJF1701.4-2019)
Description (Translated English) Program of Pattern Evaluation of Instrument Transformers--Part 4: Current Transformers
Sector / Industry Metrology & Measurement Industry Standard
Classification of Chinese Standard A55
Classification of International Standard 17.220
Word Count Estimation 58,577
Date of Issue 2019
Date of Implementation 2020-03-31
Issuing agency(ies) State Administration for Market Regulation

JJF 1701.4-2019: Program of Pattern Evaluation of Instrument Transformers--Part 4: Current Transformers


---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Program of Pattern Evaluation of Instrument Transformers--Part 4.Current Transformers National Measurement Technical Specification of the People's Republic of China Outline of type evaluation for measuring transformer Part 4.Current transformer Published on December 31,.2019 2020-03-31 Implementation Issued by the State Administration of Market Supervision and Administration Outline of type evaluation for measuring transformer Part 4.Current transformer Transformers-Part 4.CurrentTransformers Centralized unit. National Electromagnetic Measurement Technical Committee High-voltage Measurement Sub-Technical Committee Main drafting unit. China Electric Power Research Institute Co., Ltd. National High Voltage Metering Station Participated in the drafting unit. Zhejiang Institute of Metrology Shanxi Institute of Metrology Chongqing Huahong Instrument Co., Ltd. This specification entrusts the National Electromagnetic Measurement Technical Committee High Voltage Measurement Sub-Technical Committee to interpret The main drafters of this specification. Ye Guoxiong (China Electric Power Research Institute Co., Ltd.) Liu Yong (China Electric Power Research Institute Co., Ltd.) Yue Changxi (National High Voltage Metering Station) Chen Xiwen (National High Voltage Metering Station) Participating drafters. Wu Baiding (Zhejiang Institute of Metrology) Dong Ping (Shanxi Institute of Metrology) Qin Jiangfeng (Chongqing Huahong Instrument Co., Ltd.)

table of Contents

Introduction (Ⅲ) 1 Scope (1) 2 References (1) 3 Terminology (1) 3.1 Routine test (1) 4 Overview (2) 5 Legal management requirements (2) 5.1 Unit of measurement (2) 5.2 External structure (2) 5.3 Logo (2) 5.4 Submitted technical materials (3) 6 Measurement requirements (3) 6.1 Accuracy level (3) 6.2 Measurement interval (3) 6.3 Winding polarity (4) 6.4 Error limits (4) 7 General technical requirements (4) 7.1 Operating environmental conditions (4) 7.2 Appearance and structure (5) 7.3 Technical requirements (5) 8 List of Type Evaluation Items (12) 9 Provide the number of prototypes and how to use them (13) 9.1 General requirements (13) 9.2 Number of prototypes provided (13) 9.3 How to use the prototype (14) 10 Test methods and conditions of test items, data processing and qualification criteria (14) 10.1 General test conditions (14) 10.2 Inspection of signs (15) 10.3 Primary power frequency withstand voltage test (16) 10.4 Partial discharge measurement (17) 10.5 Secondary-end power frequency withstand voltage test (19) 10.6 Inter-segment power frequency withstand voltage test (20) 10.7 Inter-turn overvoltage test (20) 10.8 Capacitance and dielectric loss factor measurement (21) 10.9 Accuracy test (23) 10.10 Insulation oil performance test (24) 10.11 Gas dew point measurement (27) 10.12 Temperature rise test (28) 10.13 Primary end impact pressure test (30) 10.14 Wet test of outdoor type transformer (32) 10.15 Radio interference voltage (RIV) test (33) 10.16 Inspection of enclosure protection level (34) 10.17 Sealing performance test at ambient temperature (36) 10.18 Pressure test (applicable to gas-insulated products) (38) 10.19 Short-term current test (39) 11 Table of measuring instruments and equipment used in the test project (40) Appendix A Type Evaluation Record Format (42) Appendix B Type Evaluation Report Format (44) Appendix C Format of "Description" for Type Evaluation and Preservation Prototype (50)

Introduction

This outline is based on JJF 1016-2014 "Guidelines for the Compilation of Outlines for Measuring Apparatus Type Evaluation", JJF 1015-2014 Compiled in accordance with the requirements of the “General Specification for Type Evaluation of Measuring Instruments”. This outline is published for the first time. Outline of type evaluation for measuring transformer Part 4.Current transformer

1 Scope

This outline is applicable to the type evaluation of current transformers for measurement with classification code 15280500. This outline is applicable to electromagnetic measurement of power supply gas, frequency of 50Hz, rated secondary current of 5A or 1A electromagnetic Type current transformer.

2 Reference documents

The outline cited the following documents. JJG313 measuring current transformer GB/T 156 standard voltage GB/T 311.1 Insulation coordination Part 1.Definitions, principles and rules GB/T 2423.23 Environmental Test Part 2.Test Method Test Q. Seal GB/T 3954 Electrician round aluminum rod GB/T 4208 enclosure protection level (IP code) GB/T 4756 Manual sampling method of petroleum liquid GB/T 5585.1 Copper, aluminum and its alloy busbars for electrical purposes Part 1.Copper and copper alloy busbars GB/T 5832.2 Determination of trace moisture in gas analysis Part 1.Dew point method GB/T 7354 Partial discharge measurement of high voltage test technology GB/T 7674 Gas insulated metal enclosed switchgear with rated voltage of 72.5kV and above GB/T 8905 Guidelines for gas management and detection in SF6 electrical equipment GB/T 11604 High-voltage electrical equipment radio interference test method GB/T 16927.1 High voltage test technology Part 1.General definition and test requirements GB/T 16927.2 High voltage test technology Part 2.Measurement system GB/T.20138 Protection level of electrical equipment shell against external mechanical collision (IK code) GB/T 20840.1-2010 Transformers Part 1.General technical requirements GB/T 20840.2-2014 Transformers Part 2.Supplementary technical requirements for current transformers IEC 60376 Sulfur hexafluoride (SF6) technical grade specification for electrical equipment DL/T 506 Insulation gas humidity measurement method in sulfur hexafluoride electrical equipment For dated reference documents, only the dated version applies to this outline; for those without date references The latest version (including all amendments) is applicable to this outline.

3 Terminology

The terms used in the documents cited in this outline and the following terms apply to this outline. 3.1 routine test routinetest

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