Results 1 to 10 of about 2,822 (222)
New Synthetic Partial Discharge Calibrator for Qualification of Partial Discharge Analyzers for Insulation Diagnosis of HVDC and HVAC Grids [PDF]
Sensors, 2023 A synthetic partial discharge (PD) calibrator has been developed to qualify PD analyzers used for insulation diagnosis of HVAC and HVDC grids including cable systems, AIS, GIS, GIL, power transformers, and HVDC converters.
Abderrahim Khamlichi +2 more
doaj +2 more sources
Setup of standard PD calibrator and its uncertainties [PDF]
Journal of Electrical Engineering and Technology, 2011 The present paper describes the setup of standard partial discharge calibrator for measuring partial discharge and estimating uncertainties. The standard PD calibrator was designed and set up, consisting of a digital pulse generator, capacitor modules, and a digital oscilloscope controlled by software developed in the laboratory.
Sang-Hwa Yi
exaly +2 more sources
A Physical Calibrator for Partial Discharge Meters
Energies, 2019 This article offers an alternative method of calibrating partial discharge meters for research and teaching purposes. Most current modern calibrators are implemented as precise voltage pulse sources with a coupling capacitor.
Iraida Kolcunová +2 more
exaly +3 more sources
IET Generation, Transmission & Distribution, 2023 Partial discharge is one of the main reasons for insulation degradation in high‐voltage apparatuses. Partial discharge is an ineluctable phenomenon that happens when a high electrical field is adjacent to an insulator. High‐frequency current transformers
Hamidreza Besharatifard +3 more
doaj +1 more source
Partial discharge calibrator of a cavity inside high-voltage insulator
Open Engineering, 2022 This article displayed the method of partial discharge (PD) measurement in high-voltage insulator and calibrating the effective element (capacitor) to enhance the PD signal.
Hamoodi Ali N. +2 more
doaj +1 more source
LONG-TERM STABILITY OF Co-C AND Pd-C EUTECTIC FIXED POINTS FOR THERMOCOUPLES CALIBRATION [PDF]
Measuring Equipment and Metrology, 2021 Eutectic fixed points are close to becoming a reference for high temperatures calibration, especially as the new International Temperature Scale (ITS) approach to issue after the re-definition of the Kelvin unit. In this work the long-term stability of Co-C and Pd-C eutectic fixed points were investigated using NIS-Egypt facilities.
Abdelaziz Yasser A. +2 more
openaire +2 more sources
Uncertainty assessment on the calibration of Pt/Pd thermocouples at the freezing point of copper
Proceedings of the 41st SICE Annual Conference. SICE 2002., 2003 For uncertainty assessment on the calibration of Pt/Pd thermocouples at the freezing point of copper, uncertainty components of the automatic ice point for the reference junction, the digital voltmeter, the thermocouple extension wires, and the copper wires were estimated.
Izuchi, Masaya +4 more
openaire +1 more source
International Journal of Electrical Power & Energy SystemsThe correct identification of partial discharges (PDs) is instrumental for the maintenance plan in gas-insulated systems (GIS). However, onsite PD measurements are difficult, especially in HVDC systems, where partial discharges can be confused with ...
Christian Mier +3 more
doaj +1 more source
MetrologyThis study presents a characterization method for High-Frequency Current Transformers (HFCTs) intended for partial discharge (PD) measurement in on-line acquisition systems designed for AI-based processing and clustering.
Laura Della Giovanna +2 more
doaj +1 more source
Evaluation of Uncertainty in Partial Discharge Measurement: A Case Study
IEEE AccessISO/IEC 17025:2017 recommends all accredited laboratories under this standard, performing testing and calibration, shall identify and evaluate the contributions to the uncertainty of their measurements.
Asif Islam +5 more
doaj +1 more source