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JJF 1856-2020 English PDF

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JJF 1856-2020: Calibration Specification for Partial Discharge Testers - Part 1: Ultrasonic Partial Discharge Testers
Status: Valid

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
JJF 1856-2020	English	439	Add to Cart	4 days [Need to translate]	Calibration Specification for Partial Discharge Testers - Part 1: Ultrasonic Partial Discharge Testers	Valid	JJF 1856-2020

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Basic data

Standard ID	JJF 1856-2020 (JJF1856-2020)
Description (Translated English)	Calibration Specification for Partial Discharge Testers - Part 1: Ultrasonic Partial Discharge Testers
Sector / Industry	Metrology & Measurement Industry Standard
Classification of Chinese Standard	A55
Word Count Estimation	19,171
Date of Issue	2020-09-11
Date of Implementation	2021-03-11
Regulation (derived from)	Announcement No. 40 (2020) of the State Administration for Market Regulation
Issuing agency(ies)	State Administration for Market Regulation

JJF 1856-2020: Calibration Specification for Partial Discharge Testers - Part 1: Ultrasonic Partial Discharge Testers

---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.
Calibration Specification for Partial Discharge Testers - Part 1.Ultrasonic Partial Discharge Testers National Metrology Technical Specifications of the People's Republic of China Partial discharge tester calibration specification Part 1.Ultrasonic partial discharge tester 2020-09-11 released 2021-03-11 implementation Issued by the State Administration for Market Regulation Partial discharge tester calibration specification Part 1.Ultrasonic Method Partial discharge tester Focal point. National Electromagnetic Metrology Technical Committee High Voltage Metrology Sub-committee Main drafting unit. State Grid Zhejiang Electric Power Co., Ltd. Electric Power Research Institute China Electric Power Research Institute Co., Ltd. Participated in the drafting. State Grid Hunan Electric Power Research Institute Zhejiang Institute of Metrology Shanghai Songbao Technology Development Co., Ltd. This specification entrusts the National Electromagnetic Measurement Technical Committee High Voltage Measurement Sub-Technical Committee to be responsible for the interpretation The main drafters of this specification. Gong Jinlong (State Grid Zhejiang Electric Power Co., Ltd. Electric Power Research Institute) Zhou Wei (China Electric Power Research Institute Co., Ltd.) Wang Yifan (State Grid Zhejiang Electric Power Co., Ltd. Electric Power Research Institute) Participating drafters. Ye Huisheng (State Grid Hunan Electric Power Research Institute) Wu Baiding (Zhejiang Institute of Metrology) Li Gang (Shanghai Songbao Technology Development Co., Ltd.) Song Qihua (State Grid Zhejiang Electric Power Research Institute)

Introduction (Ⅱ) 1 scope (1) 2 Reference documents (1) 3 Terms and definitions (1) 3.1 Ultrasonic partial discharge tester (1) 3.2 Touch sensor(1) 3.3 Center frequency(1) 3.4 Upper cut-off frequency (1) 3.5 Lower cutoff frequency(1) 3.6 dB amplitude(1) 3.7 Pulse width (2) 4 Overview (2) 5 Measurement characteristics (2) 5.1 Cutoff frequency error γf (2) 5.2 Voltage amplitude error γA (2) 5.3 Short-term stability Ss (2) 6 Calibration conditions (2) 6.1 Environmental conditions (2) 6.2 Measurement standards and auxiliary equipment (3) 7 Calibration items and calibration methods (3) 7.1 Calibration items (3) 7.2 Preparation before calibration (4) 7.3 Calibration method (4) 8 Calibration result expression (6) 8.1 Calibration certificate (6) 8.2 Effective digits of data(6) 9 Recalibration interval (6) Appendix A Example of Uncertainty Evaluation of Voltage Amplitude Error Measurement (7) Appendix B Calibration Original Record Format (11) Appendix C Internal page format of calibration certificate (page 2) (13) Appendix D Calibration Certificate Calibration Results Page Format (Page 3) (14)

Introduction

JJF 1001-2011 "General Metrology Terms and Definitions", JJF 1059.1-2012 "Measuring Uncertainty Evaluation and Representation” and JJF 1071-2010 “Rules for the Compilation of National Metrology and Calibration Specifications” together constitute the foundation supporting this specification Series of standards. This specification refers to GB/T 7354-2018 "High Voltage Test Technology Partial Discharge Measurement" and DL/T 1416-2015 "General Technical Conditions of Ultrasonic Partial Discharge Tester". This specification is released for the first time. Partial discharge tester calibration specification Part 1.Ultrasonic partial discharge tester

1 Scope

This specification applies to the calibration of contact ultrasonic partial discharge testers with measuring frequencies in the range of 20kHz to 500kHz.

2 Reference documents

This specification refers to the following documents. GB/T 7354-2018 Partial discharge measurement of high voltage test technology DL/T 1416-2015 Ultrasonic partial discharge tester general technical conditions For dated reference documents, only the dated version applies to this specification; for undated references The latest version (including all amendments) is applicable to this specification.

3 Terms and definitions

The following terms and definitions apply to this specification. 3.1 Ultrasonic partial discharge tester The ultrasonic signal is converted into an electric signal through the ultrasonic sensor and transmitted to the measurement host, which is A device for measuring the discharge level. [DL/T 1416-2015,3.1] 3.2 Touch sensor A sensor that is installed or placed on the housing of electrical equipment and receives ultrasonic signals through contact. [DL/T 1416-2015,3.2] 3.3 Center frequency The frequency at which the sensor of the tester reaches the resonance state, at which time the frequency response of the tester is maximum. 3.4 Upper cutoff frequency Taking the center frequency as a reference, the signal frequency rises to make the transmission impedance Z(f) drop by 6dB from the peak of the passband Frequency value. It is generally represented by the symbol f1. [GB/T 7354-2018, 3.9.2, with modification] 3.5 Lower cutoff frequency Taking the center frequency as a reference, the signal frequency is reduced, so that the transmission impedance Z(f) is reduced by 6dB from the peak of the passband. Frequency value. It is generally represented by the symbol f2. [GB/T 7354-2018, 3.9.2, with modification] 3.6 dB amplitude The logarithmic measurement value of the peak amplitude of the ultrasonic signal with 1μV or 1mV as the reference. The unit is dB.

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