JJG 494-2005 English PDF

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JJG 494-2005: Verification Regulation of High Voltage Electrostatic Voltmeters
Status: Valid

JJG 494: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
JJG 494-2005	499	Add to Cart	4 days	Verification Regulation of High Voltage Electrostatic Voltmeters	Valid
JJG 494-1987	359	Add to Cart	3 days	High Voltage Electrostatic Voltmeter	Obsolete

Similar standards

GB/T 43191   GB/T 15284   JJG 2059   JJF 1497   

Basic data

Standard ID: JJG 494-2005 (JJG494-2005)
Description (Translated English): Verification Regulation of High Voltage Electrostatic Voltmeters
Sector / Industry: Metrology & Measurement Industry Standard
Classification of Chinese Standard: N21;A55
Classification of International Standard: 17.220
Word Count Estimation: 19,130
Date of Issue: 2005-12-20
Date of Implementation: 2006-06-20
Older Standard (superseded by this standard): JJG 494-1987
Summary: This standard applies to the rated voltage higher than 600V, used to measure the frequency high voltage and high voltage direct current high voltage electrostatic voltmeter indication (hereinafter referred to as electrostatic voltmeter) the initial verification, testing and use of follow-up inspection.

JJG 494-2005: Verification Regulation of High Voltage Electrostatic Voltmeters

---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.
Verification Regulation of High Voltage Electrostatic Voltmeters National Metrology Verification Regulations of the People's Republic High voltage electrostatic voltmeter Released on December 12,.2005 2006-06-20 implementation The General Administration of Quality Supervision, Inspection and Quarantine issued Replace JJG 494-1987 This regulation was approved by the General Administration of Quality Supervision, Inspection and Quarantine on December 20,.2005, and Implemented on June 20,.2006. Focal Point. National Electromagnetic Measurement Technical Committee Main drafting unit. National High Voltage Metering Station Hubei Institute of Metrology and Testing Technology Jiangsu Institute of Metrology and Testing Participated in the drafting unit. Guangxi Electric Power Research Institute Henan Institute of Metrology This procedure entrusts the National Electromagnetic Measurement Technical Committee to explain The main drafters of this procedure. Lei Min (National High Voltage Metering Station) Xiao Hongqing (Hubei Institute of Metrology and Testing Technology) Lu Yun (National High Voltage Metering Station) Pan Baoxiang (Jiangsu Institute of Metrology and Testing) Participate in the drafters. Xiang Qiong (National High Voltage Metering Station) Rui Rui (Hubei Institute of Metrology and Testing Technology) Yin Liqun (Guangxi Electric Power Research Institute) Zhou Bingshi (Henan Institute of Metrology)

table of Contents

1 Scope (1) 2 References (1) 3 Overview (1) 4 Metrology performance requirements (1) 4.1 Basic error and accuracy level (1) 4.2 Variation and zero error (1) 4.3 Dispersibility (2) 4.4 Tilt error (2) 4.5 years stability (2) 5 General technical requirements (2) 5.1 Appearance (2) 5.2 Dielectric strength (3) 5.3 Damping (3) 5.4 Overshoot (3) 6 measuring instrument control (3) 6.1 Verification conditions (3) 6.2 Verification project (6) 6.3 Verification method (7) 6.4 Processing of verification results (10) 6.5 Verification cycle (11) Appendix A Original Record Format (12) Appendix B Format of the Internal Page of the Certificate and the Format of the Verification Result Notice (13) High-voltage electrostatic voltmeter verification procedures

1 Scope

This procedure is applicable to the indication voltage of the rated voltage higher than 600V for measuring the power frequency high voltage and the DC high voltage. The first verification, subsequent verification and in-use inspection of the piezoelectric voltmeter (hereinafter referred to as the electrostatic voltmeter).

2 reference files

JJF1001-1998 General Terms and Definitions GB/T 16927-1997 "High Voltage Test Technology" When using this procedure, care should be taken to use the current valid version of the above cited documents.

3 Overview

An electrostatic voltmeter is a measuring instrument for measuring power frequency high voltage and DC high voltage. Its working principle is as follows. When a voltage is applied between the fixed electrode of the electrostatic voltmeter and the movable electrode, an electrostatic force is generated between the electrodes of the electrostatic voltmeter. The electrostatic force causes the movable electrode to move and move. At this time, a certain external force is applied to the movable electrode by some method to make it Balance with electrostatic force. In this equilibrium state, the magnitude of the electrostatic force is related to the amount of charge on the electrode, ie, applied The magnitude of the voltage between the electrodes is related. Therefore, the magnitude of the voltage between the electrodes can be known by measuring the corresponding balance force. This A voltmeter that operates using the principle of electrostatic force is called an electrostatic voltmeter.

4 Metrological performance requirements

4.1 Basic error and accuracy levels 4.1.1 The basic error of the electrostatic voltmeter shall not exceed the gauge in Table 1 on all the indexing lines of the working part of the scale. Value. Table 1 Basic error and accuracy level Electrostatic voltmeter accuracy level 0.2 0.5 1.0 1.5 2.5 5.0 Allowable basic error (%) ±0.2 ±0.5 ±1.0 ±1.5 ±2.5 ±5.0 4.1.2 The basic error of the electrostatic voltmeter is expressed as a percentage of the upper limit of the working part of the scale. Formula 1). r= Vx-V0 Vxm × 100% (1) Where Vx---the static voltmeter reading value is checked; V0---standard voltage value; Vxm---The upper limit of the static voltmeter to be tested. 4.2 Variation and zero error 4.2.1 Electrostatic voltmeters that are miniature, small, and capable of withstanding mechanical forces shall not degrade their indication values beyond their tolerances. ......

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