Lab Skills for Switch-Mode Power Supply
This article discusses how to carefully select passive probes for measurement, how to optimize measurement methods, and introduces alternative measurement
Impedance-frequency characteristic curve of 10kV bus
Phase angle -frequency characteristic curve of 10kV bus. From Figures 13 to 15, it can be seen that the zero points in the phase angle-frequency characteristic curve of the 35kV bus and...
Bus Assembly Testing
Measurement shall be made using DC current of at least 50A (100A preferred) and less than the nominal current rating of the bus assembly. The test shall be conducted as close as practical to ambient
Fault Diagnosis and Troubleshooting of 10kV High-Voltage Switchgear
High-Voltage Fuse Blown: Measure voltage across the fuse terminals; inspect busbar joints, cable terminations, and protection relay settings. Busbar Discharge or Insulator Damage: Listen for
Impact of Realistic Bus Frequency Measurements on Wide-Area
However, PMUs are installed on system buses and, typically, only bus frequency measurements are available to a WADC. In this paper, we consider both ideal and Phase-Locked Loop (PLL) estimated
The voltage of the 10kV bus fluctuates between high and low, and the
A strange phenomenon occurred in a 35kV substation for several consecutive days: the 10kV bus voltage fluctuated irregularly between 6.5kV and 11.3kV, causing the reactive power
Analysis and Measures of 10kV Bus PT Breakdown Accident
Abstract: A 10kV bus PT breakdown accident caused by two-phase grounded is mainly introduced in this paper. Firstly, the bus voltage variation is analyzed when two-phase grounded occurs.
Precision Current Measurements on High-Voltage Power-Supply
There are multiple measurement methods and locations where current is measured to evaluate this informative signal. One current measurement location is in the return path to ground of a particular
Lab Skills for Switch-Mode Power Supply Evaluation—Part 1:
This article discusses how to carefully select passive probes for measurement, how to optimize measurement methods, and introduces alternative measurement techniques to further aid in
Fault analysis and operation treatment of improper parallel connection
Take the grounding of phase A of the 10kV No. 4 bus as an example to analyze the changes in the composite voltage and verify whether the judgment and handling of this fault are correct.
RobustLearningBasedConditionDiagnosisMethodfor
The correlation analysis can determine the key features under different operating conditions: 1) Normal condition: all data are within the normal range, no abnormal readings, and the equipment loading
A study on technical specifications of voltage and current
This paper analyzes the technical specifications of voltage and current measurement apparatuses for typical ± 10kV MVDC systems considering the systems requirements and compares
Comparison of Bus Frequency Estimators for Power System
This section presents the bus frequency estimation tech-niques considered in this paper, namely Center of Inertia (COI), Washout Filter (WF) and Frequency Divider (FD).
Optical Power Meters & Sources
High-precision power meters (Ge/InGaAs) and stabilized light sources for insertion loss and return loss testing.
OTDR & Fiber Characterization
Full-featured OTDR, fiber OTDR testers, and modular OTDR test modules for network deployment and troubleshooting.
OSA & Eye Diagram Analyzer
High-resolution OSA for DWDM and eye diagram testers for signal integrity validation.
BERT & Endface Inspection
BERT up to 800G, fiber endface inspection probes, and extinction ratio meters for comprehensive testing.