Calibration of high voltage standard capacitors in Libreville
An accurate on-site calibration system for electronic voltage transformers using a standard capacitor …
[15] Anderson W E, Davis R S, Petersons O and Moore W J M 1978 An international comparison of high voltage capacitor calibration IEEE Trans. Power. Appar. Syst. 4 1217–23 Crossref Google Scholar [16] Latzel …
Calibration of Voltage Transformers and High
The National Institute of Standards and Technology (NIST) calibration service for voltage transformers and high-voltage capacitors is described. The service for voltage transformers ...
Calibration of Dissipation Factor Standards
dards and Technology (NIST) provides a calibration service for standard capacitors, including both low- and high-voltage devices used in standards laboratories, as well as specialized capacitors used in power industry applications [I]. The dissipation factor
Calibration of capacitance
Measurement bridges and LCR-meters are calibrated by measurements against secondary capacitance standards. Calibrations of high voltage capacitors can be performed up to 300 kV (for more information see the National Laboratory for high voltage and high
Film Capacitors
These high-voltage capacitors – miniature wrap and fill capacitors – blend high-performance with longevity and durability. Electrocube''s variety of styles, capacitance dimensions and performance characteristics – standard, commodity and custom, plus low price and high volume – meet virtually all system requirements from the most demanding …
Pole-mounted capacitor
The 3370 is a series of standardized SF6 insulated higly stable nominal capacitors available in the voltage range from 5 to 200 kV. It is used together with a power factor / tan delta measuring instrument as a comparison standard for exact measurements of capacitance and tan d of HV equipment li...
A Calibration service for voltage transformers and high-voltage …
The National Bureau of Standards calibration service for voltage transformers and high-voltage. capacitors is described. The service for voltage transformers supports the …
Calibration of voltage transformers and high-voltage capacitors at …
Volume 94, Number 3, May-June 19S9 Journal of Research of the National Institute of Standards and Technology In the past NIST had used a "comparative null method" to calibrate voltage transfonners. The un- known transformer was compared to a NIST refer- …
Precise current comparator for the calibration of high voltage standard …
The development of a precise low-frequency current comparator and a fused silica tube capacitor standard for the calibration of high-voltage standard transformers is described. A comparison with a high-voltage standard transformer of the PTB was carried out using these devices; measurement results obtained are presented.
An International Comparison of High Voltage Capacitor Calibration
The suitability of a commercially available, compressed-gas-insulated, high voltage capacitor for precise measurement of ac voltages has been examined by national laboratories in the U.S.A. and Canada. The voltage, temperature, and pressure dependences and the mechanical stability of the capacitor were determined. It was found …
NIST Technical Note 1486 NIST Special Test Service for Four …
Where appropriate, both Type A and Type B uncertainty components are considered. The capacitance scaling method uses ceramic capacitors with temperature coefficients on …
Calibration of voltage transformers and high-voltage capacitors at …
[2]. The one most used in high-voltage applications in the last 60 years is the Schering bridge (fig. 1). The two high-voltage arms of this bridge consist of the standard and unknown capacitors ...
Adapted Technique for Calibrating Voltage Dividers of AC High-Voltage …
This paper presents an adapted technique to calibrate the AC voltage divider of AC high-voltage measuring systems up to 200 kV at the Egyptian National Institute of Standards. Two identical capacitors have been used as two similar AC high-voltage capacitive dividers. Firstly, the dividing ratios of two capacitors have been …
An accurate on-site calibration system for electronic voltage transformers using a standard capacitor …
DOI: 10.1088/1361-6501/aaa6a0 Corpus ID: 116712121 An accurate on-site calibration system for electronic voltage transformers using a standard capacitor @article{Hu2018AnAO, title={An accurate on-site calibration system for electronic voltage transformers using a standard capacitor}, author={Chen Hu and Mianzhou Chen and …
Research on the reliability of capacitor voltage transformers …
The capacitor voltage transformer (CVT) has been widely used in high voltage (HV) and ultra-high voltage (UHV) substations to convert the primary voltage …
A voltage-controlled capacitance offset calibration technique for high …
Abstract: This paper presents a high resolution and wide range offset calibration technique for high resolution comparators. The proposed calibration technique significant reduces the calibration capacitance from conventional 2 n binary-scaled capacitors array to a small voltage-controlled capacitor. ...
Technical paper A Guide for Partial Discharge Measurements on medium voltage (MV) and high voltage (HV…
A Guide for Partial Discharge Measurements on medium ...
Capacitance and Dissipation Factor | SpringerLink
Here, only the fundamental oscillation of the AC quantities is considered. As an example, Fig. 11.1a shows a plate capacitor having a lossy dielectric.When an AC voltage U is applied, the current I flowing through the capacitor has two components: a capacitive component I C leading the voltage U by 90, and a usually much smaller …
Implementation of a high-voltage primary standard method using …
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Influence of standard capacitors on the quality of high voltage tests on electrical energy transmission equipments …
M ANY calibrations of high-voltage power equipment depend on standard capacitors. This is the case of voltage transformers, high-voltage dividers [1], and tangent delta bridges, among others [2 ...
Calibration of Voltage Transformers and High
The National Institute of Standards and Technology (NIST) calibration service for voltage transformers and high-voltage capacitors is described. The service for voltage transforme
Measurement Uncertainty in Voltage Coefficients for Compressed-Gas Capacitor …
The capacitor is used in determining the voltage coefficients of NBS-owned commercial standard capacitors; in the calibration of customers'' standard capacitors, voltage transformers, and dividers ...
Determination of Voltage Dependence in High-Voltage Standard …
calibrations of high-voltage power equipment depend on standard capacitors. This is the case of volt-age transformers, high-voltage dividers [1], and tangent delta bridges, …
Research on the reliability of capacitor voltage transformers calibration …
All the experiments were carried out in a HV testing hall, where the external electromagnetic interference is extremely weak and under control. Firstly, the basic accuracy experiments on these three CVTs are carried out in turn, with a Tettex 3370 standard
Research on the reliability of capacitor voltage transformers …
The calibration in the laboratory, on-site calibration and three-phase operating CVTs are simulated according to actual operating conditions. Both the …
Understanding HV Capacitors: A Comprehensive Guide
High Voltage (HV) capacitors are essential components in numerous electrical systems, ranging from power grids and industrial equipment to advanced electronic devices. These capacitors play a ...
HV Calibration and Voltage Monitoring AC/DC Dividers
The DVR Series of high voltage resistor/capacitor designed dividers are for the measurement of high voltage output sources or for the calibration of metering devices. They are dividers only, designed to interface with standard multi-meters and oscilloscopes commonly used.
Calibration of Voltage Transformers and High
The National Institute of Standards and Technology (NIST) calibration service for voltage transformers and high-voltage capacitors is described. The service for voltage …
INFLUENCE OF STANDARD CAPACITORS ON THE QUALITY OF HIGH VOLTAGE …
2. HIGH-VOLTAGE STANDARD CAPACITORS ANALYSIS Pressurized gas capacitors can be used in high-voltage tests as: standards in bridge circuits for capacitance and loss factor measurement; part of potential dividers for high-dividers for
AUTOMATIC CAPACITANCE BRIDGES MODEL 7010C …
Capacitance Measurement and Calibration The 7010C is capable of performing both 2 and 3 terminal capacitance measurements. Three terminal measurements (lead compensation) are typically performed when very large capacitors are to be measured to remove
An accurate on-site calibration system for electronic voltage …
Ordinarily electronic voltage transformers (EVTs) are calibrated off-line and the calibration procedure requires complex switching operations, which will …
New Reference Measurement System for Calibration of VLF High Voltage …
However, since the use of standard capacitors on the onsite calibration applications is not suitable due to sensitivity to the on-site applications such as transportation, different types of high ...
Method for Determining Dissipation Factor of Capacitors Without Reference Capacitor at Voltage…
Objectives and design This paper describes a method to determine absolutely the dissipation factor (DF) of a capacitor connected with resistor in series that doesn''t depend on any reference capacitor with a known DF. Materials and methods The method was applied to calibrate the DFs for two capacitor-resistor boxes that had DF …
An accurate on-site calibration system for electronic voltage …
The designed standard capacitor is a SF6 gas-insulated, high-voltage capacitor with coaxial cylinder type. The capacitance is specified as 50 pF. The rated …
Determination of Voltage Dependence in High-Voltage Standard Capacitors …
Request PDF | On Jul 1, 2018, Daniel Slomovitz and others published Determination of Voltage Dependence in High-Voltage Standard Capacitors | Find, read and cite all the ...
Calibration of Voltage Transformers and High
The service for high-voltage capacitors provides measurements of capacitance and dissipation factor at applied voltages ranging from 100 V to 170 kV at 60 Hz depending on the nominal …
Determination of Voltage Dependence in High-Voltage Standard Capacitors
Index Terms—Calibration, capacitor, high voltage, power fre-quency. I. INTRODUCTION M ANY calibrations of high-voltage power equipment depend on standard capacitors. This is the case of volt-age transformers, high-voltage dividers [1], and tangent delta
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