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JJF 1658-2017 English PDF

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JJF 1658-2017: Calibration Specification for Loss-of-voltage Timers
Status: Valid

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
JJF 1658-2017	English	419	Add to Cart	4 days [Need to translate]	Calibration Specification for Loss-of-voltage Timers	Valid	JJF 1658-2017

PDF similar to JJF 1658-2017

Standard similar to JJF 1658-2017

GB/T 3222.1 JJF 1234 JJF 1396 JJF 1901 JJF 1900 JJF 1662

Basic data

Standard ID	JJF 1658-2017 (JJF1658-2017)
Description (Translated English)	Calibration Specification for Loss-of-voltage Timers
Sector / Industry	Metrology & Measurement Industry Standard
Classification of Chinese Standard	A57
Classification of International Standard	17.080
Word Count Estimation	18,168
Date of Issue	2017-11-20
Date of Implementation	2018-02-20
Quoted Standard	JJF 1180; GB/T 17215.301-2007; DL/T 566-1995
Regulation (derived from)	AQSIQ Notice 2017 No. 103
Issuing agency(ies)	General Administration of Quality Supervision, Inspection and Quarantine
Summary	This standard applies to the calibration of voltage-loss timers (pressure-loss timers, loss-of-voltage cut-off timers, loss-of-voltage cut-off short-circuit timers).

JJF 1658-2017: Calibration Specification for Loss-of-voltage Timers

---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.
(Voltage loss timer calibration standard) People's Republic of China National Metrology Technical Specifications Voltage loss timer calibration specification Published on.2017-11-20 2018-02-20 Implementation The State Administration of Quality Supervision, Inspection and Quarantine issued Voltage loss timer calibration specification Key units. National Time Frequency Measurement Technical Committee The main drafting units. Zhengzhou Quality and Technology Supervision, Inspection and Test Center Guizhou Provincial Measurement and Testing Institute Participated in the drafting. Henan Power Company Zhengzhou Power Supply Company Hubei Hongli Electronics Co., Ltd. This specification entrusts the National Time Frequency Measurement Technical Committee to explain The main drafters of this specification. Ke Cunrong (Zhengzhou Quality and Technology Supervision, Inspection and Test Center) Liu Xiaodong (Measuring Institute of Guizhou Province) Participating drafters. Zhang Xianghong (Zhengzhou Quality and Technology Supervision, Inspection and Test Center) Su Baiyuan (Henan Provincial Power Company Zhengzhou Power Supply Company) Feng Qingsong (Hubei Hongli Electronics Co., Ltd.)

Introduction (II) 1 Scope (1) 2 References (1) 3 Terms and units of measure (1) 3.1 Starting voltage (1) 3.2 Return voltage (1) 3.3 Starting current (1) 3.4 Reference Voltage (1) 4 Overview (1) 5 Metrological characteristics (2) 5.1 Clock Differencing (2) 5.2 Starting voltage (2) 5.3 Return voltage (2) 5.4 Starting current (2) 6 Calibration Conditions (2) 6.1 Environmental Conditions (2) 6.2 Measurement Standards and Other Equipment (3) 7 Calibration Items and Calibration Methods (3) 7.1 Appearance and Function Check (3) 7.2 Clock Differential Calibration (3) 7.3 Starting Voltage and Return Voltage Measurement (5) 7.4 Starting Current Measurement (5) 7.5 Calibration Uncertainty for Evaluation of Clock Differencing, Starting Voltage and Starting Current (5) 8 Expression of Calibration Results (5) 9 Re-school interval (6) Appendix A Calibration Record Format (7) Appendix B Calibration Certificate Inner Page Format (8) Appendix C Calibration Uncertainty Evaluation Example (9)

Introduction

This specification is based on JJF 1071-2010 "Rules for the preparation of national measurement calibration specifications", JJF 1001-2011 Using Measurement Terms and Definitions" and JJF 1059.1-2012 Evaluation and Expression of Measurement Uncertainty. This specification is the first release. Voltage loss timer calibration specification

1 Scope

This specification applies to voltage-loss timers (pressure-loss timers, loss-of-voltage-off timers, loss-of-voltage-disconnected short-circuit timers Calibration).

2 references

JJF 1180 Time Frequency Measurement Terminology and Definition GB/T 17215.301-2007 Special requirements for multi-function electric energy meter DL/T 566-1995 Voltage Voltage Loss Timer Specifications For dated references, only dated editions apply to this specification; all undated references The latest version (including all amendments) applies to this specification.

3 Terms and units of measure

3.1 Starting voltage triggervoltage Let the timing unit act reliably and start counting the maximum input voltage in volts. 3.2 Return voltage returnvoltage The minimum value of the input voltage to change the timing unit from timed to stopped. Unit. V. 3.3 Starting current trigger current Under the condition that there is no voltage in the voltage loop, make the timing unit operate reliably and start the timing of the minimum input current Value in mA. 3.4 Reference voltage referencevoltage Determine the voltage value of the relevant characteristics of the meter, unit. V. Classified according to different specifications, the reference voltage is generally divided into. 3 × 100V, 3 × 380V, 3 × 57.7/100V, 3×220/380V.

4 Overview

The voltage pressure loss timer (hereinafter referred to as the timer) is a dedicated device that displays and displays the voltage loop voltage loss time of the energy meter. instrument. It is commonly used to monitor the operating status of three-phase three-wire (three-phase four-wire) active power (reactive power) meters. When running The power meter under the condition of the load current, voltage transformer loss, undervoltage and current transformer secondary circuit open When a road or man-made short circuit occurs, the timer can timely reflect the fault condition, give an alarm signal, and record the missing phase. Pressure, breaking, short circuit time. According to the different functions, there are generally a pressure-loss timer, a pressure-loss timer, and a loss of voltage Short-circuit timers and other types. Take three-phase three-wire as an example, the internal working principle of the timer is shown in Figure 1, outside the timer The wiring is shown in Figure 2.

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