Research the Test Method of the Voltage Transformer Secondary Load in the Three-Phase Three-Wire Electric Energy Metering Device

2014 ◽  
Vol 687-691 ◽  
pp. 3110-3115
Author(s):  
Gu Li ◽  
Zi Ming Fu ◽  
Jie Feng Yan ◽  
Bing Wen Li ◽  
Zhi Rong Cen
Keyword(s):  
Power Supply System ◽  
Electric Energy ◽  
Test Methods ◽  
Test Method ◽  
Testing Methods ◽  
Voltage Transformer ◽  
Secondary Load ◽  
Three Phase ◽  
Energy Metering ◽  
Definition Of

This paper analyzes and studies the definition of the voltage transformer secondary load, examines the practical purposes of the measured values of the voltage transformer secondary load, and presents a variety of testing methods to analyze and compare the differences. This paper gives the test methods of the voltage transformer secondary load when the connection of the voltage transformer is the Y / Y in a three-phase three-wire power supply system, filling the blank of this type of test method in the industry. When other units within the industry carry out such work, the conclusions of this paper are available for reference, and the conclusions of this paper can be referred when drafting relevant regulations in the future.

Research on Energy Consumption Test and Data Process Method of Gravure Printing Machine

2015 ◽  
Vol 738-739 ◽  
pp. 854-857
Author(s):  
Jian Jun Bai ◽  
Yi Ming Wang ◽  
Ying Cai Yuan
Keyword(s):  
Energy Consumption ◽  
Energy Balance ◽  
High Speed ◽  
Electric Energy ◽  
Test Method ◽  
Gravure Printing ◽  
Balance Test ◽  
Data Process ◽  
Three Phase ◽  
Printing Machine

In order to achieve high-speed gravure printing machine energy consumption tested and analyzed process efficiently, put forward a kind of electric energy balance test and analysis method, using power analyzer acquire and record the electric energy balance parameters of motors input ports of the three-phase power supply, and processing the data with the method of successive difference. By means of experiment, tested and analyzed the main motor energy consumption of gravure printing machine, the results verify the feasibility of electric energy balance test method and the method of successive difference.

Study on Testing Methods for Thermophysical Properties of Materials

2015 ◽  
Vol 1095 ◽  
pp. 471-475
Author(s):  
Zhe Hu ◽  
Jin Yong Jiang ◽  
Gui E Lu ◽  
Qiang Ge ◽  
Shao Guang Wang ◽  
...  
Keyword(s):  
Thermophysical Properties ◽  
Great Influence ◽  
Test Methods ◽  
Test Method ◽  
Testing Methods ◽  
Properties Of Materials

This paper introduced the relevant concepts of thermophyscal properties and some methods measuring the parameters of material about thermophyscal properties. Different test methods have their own features and advantages. It should be taken into account that the size and mass of material have great influence on the test method.

Test Methods to Visualize the Break-Down Behaviour of Sliding Bearing Materials

2007 ◽  
Author(s):  
Florian Gruen ◽  
Istvan Godor ◽  
Wilfried Eichlseder ◽  
Walter Gaertner
Keyword(s):  
Time Resolution ◽  
Test Methods ◽  
Test Method ◽  
High Time Resolution ◽  
Trial And Error ◽  
Testing Methods ◽  
Material Optimization ◽  
Scale Size ◽  
Bearing Materials ◽  
Time Of Failure

In the context of this work, testing methods of model scale size have been developed, which are based on the ring-on-disc system. These methods enable the visualization of the events in the sliding materials during operation and subsequent breakdown with high time resolution. Therefore, it is possible to visualize and analyze the events taking place at the time of failure. The new test method was benchmarked using the materials AlSn20Cu, CuPb22Sn2 and SnSb7.5Cu3.5. The resulting data enabled the generation of models that characterize the events of the different tribo-materials. Therefore, the proposed method supports the trial-and-error approach of material optimization.

State Management System of Gateway Electric Energy Metering Device Based on NI CompactRIO Platform

2013 ◽  
Vol 278-280 ◽  
pp. 998-1004
Author(s):  
Ji Xiao ◽  
Ying Ying Cheng ◽  
Juan Tian
Keyword(s):  
Real Time ◽  
Management System ◽  
Voltage Drop ◽  
Electric Energy ◽  
Online Data ◽  
State Management ◽  
Energy Meter ◽  
Secondary Load ◽  
Energy Metering ◽  
Electric Energy Meter

For the sake of real-time online monitoring the operating state and parameters of electric energy metering devices, detecting the abnormal states of devices, predicting the trend of electric energy metering device error, and changing the traditional management mode for electric energy metering devices, which adopts the cycle test rotation mechanism, this paper has proposed a state management system of electric energy metering device based on NI CompactRIO platform. The proposed system can implement real-time online management for monitoring the measurement error of electric energy meter, data acquisition of electric energy meter, test of Secondary Voltage Drop and Secondary Load of PT, test of Secondary Load of CT, video monitoring, measurement of temperature humidity, measurement of space magnetic, etc. The system combines CompactRIO platform and electric energy metering devices to acquire, monitor and analyze the real-time online data corresponding to electric energy meter, CT, PT and secondary loop. And the Energy metering error and the evaluation of parameters of electric energy metering device are calculated by the CPU, and the data is exchanged with the remote station by communication network. So the system improves the management efficiency and benefits of electric energy metering devices.

Error Calibration of Three-Phase Method for Combined Transformer

2014 ◽  
Vol 986-987 ◽  
pp. 1821-1825
Author(s):  
Bing Ai ◽  
Qiang Shi
Keyword(s):  
Single Phase ◽  
Power Grid ◽  
Electric Energy ◽  
Large Error ◽  
Phase Method ◽  
Experimental Platform ◽  
Three Phase ◽  
Energy Metering ◽  
Error Calibration

Three-phase combined transformer has a large number of application to special energy metering in power grid, its performance is directly related to the accuracy of electric energy metering. So it is necessary to ensure its performance and accuracy. It rules that three-phase combined transformer should be calibrated with three-phase method, but most of metrology departments calibrate three-phase combined transformer in single-phase method. Based on the mechanism of the three-phase transformer, single-phase method and three-phase method had been compared on three-phase transformer experimental platform. The result shows that it would be large error when the three-phase transformers are calibrated with single-phase method. Three-phase transformer calibration should be operated with three-phase method.

Influence of Transformer Rated Secondary Load Differences on Electric Energy Metering

2015 ◽  
Vol 1083 ◽  
pp. 174-177
Author(s):  
Jia Heng Xu ◽  
Jin Liang Wang ◽  
Wang Yuan ◽  
Hui Jing
Keyword(s):  
Electric Energy ◽  
Secondary Load ◽  
Energy Metering ◽  
Before And After

The transformer rated secondary load in electric energy metering device was much larger before electric energy metering device revamp. Big energy differences exist before and after the revamp. The reason of making down rated secondary load and its influence on transformer error and energy metering are analyzed in the presented work.

scholarly journals Peculiarities of current sensors used in contemporary electric energy metering devices

Energetika ◽  
2017 ◽  
Vol 63 (1) ◽  
Author(s):  
Vitalii Volokhin ◽  
Illia Diahovchenko
Keyword(s):  
Electric Energy ◽  
Advantages And Disadvantages ◽  
External Influences ◽  
Energy Metering ◽  
Current Sensors ◽  
Definition Of

An electricity meter is a  tool that determines the  amount of electricity transferred to the  network by a  producer and consumed by electrically powered loads. Metering devices are composed of sensitive sensors that simultaneously measure currents and voltages and a  microprocessor, which calculates required values basing on the  received data. This article gives an overview of the most common current sensors, which are used in contemporary electricity metering devices. Their principles, advantages and disadvantages are reviewed, conclusions about the external influences on the sensors, which can lead to the incorrect operation of a meter and wrong definition of consumed electricity, are made.

scholarly journals Hygiene in Commercial Dishwashing – A Review about the State of Knowledge in Research, Standardization, Regulation and Market Information

2021 ◽  
Vol 58 (5) ◽  
pp. 320-333
Author(s):  
Sarah Schulze Struchtrup ◽  
Britta von Esmarch-Rummler ◽  
Rainer Stamminger
Keyword(s):  
Corn Starch ◽  
Standardized Test ◽  
Test Method ◽  
Microbial Count ◽  
Target Level ◽  
Testing Methods ◽  
Current State ◽  
Microbiological Testing ◽  
Definition Of ◽  
Country Specific

Abstract The current state of knowledge about hygiene (efficacy testing) in commercial dishwashers will be collated in this review. Therefore, studies about hygiene in commercial dishwashing are summarised and existing standards, guidelines and the legislative basis described. Finally, examples of information available from the market, for example, detergents are presented. The use of bioindicators contaminated with bovine albumin, mucin, corn starch and Enterococcus faecium is widely established in studies, which was the basis for the introduction of standards. Standards prescribe minimum temperatures for cleaning and rinsing, and most of them provide microbiological testing methods. A worldwide standardized test method for hygiene in commercial dishwashers would guarantee the comparability of country-specific standards but procedures currently available would need great efforts to be unified. A definition of a specified hygiene target level on cleaned dish items would also be meaningful because a harmless level of microorganisms can be achieved with it regardless of the initial microbial count or the process used.

An evaluation of ECT sample height for small flute board grades and Box Manufacturer’s Certification compliance

TAPPI Journal ◽  
2009 ◽  
Vol 8 (6) ◽  
pp. 24-28
Author(s):  
CORY JAY WILSON ◽  
BENJAMIN FRANK
Keyword(s):  
Compressive Strength ◽  
Compressive Load ◽  
Test Sample ◽  
Test Methods ◽  
Test Method ◽  
Initial Development ◽  
Sample Height ◽  
Relationship Of ◽  
The Relationship ◽  
Corrugated Fiberboard

TAPPI test T811 is the specified method to ascertain ECT relative to box manufacturer’s certification compliance of corrugated fiberboard under Rule 41/ Alternate Item 222. T811 test sample heights were derived from typical board constructions at the time of the test method’s initial development. New, smaller flute sizes have since been developed, and the use of lighter weight boards has become more common. The T811 test method includes sample specifications for typical A-flute, B-flute, and C-flute singlewall (and doublewall and triplewall) structures, but not for newer thinner E-flute or F-flute structures. This research explores the relationship of ECT sample height to measured compressive load, in an effort to determine valid E-flute and F-flute ECT sample heights for use with the T811 method. Through this process, it identifies challenges present in our use of current ECT test methods as a measure of intrinsic compressive strength for smaller flute structures. The data does not support the use of TAPPI T 811 for ECT measurement for E and F flute structures, and demonstrates inconsistencies with current height specifi-cations for some lightweight B flute.

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