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Brief Introduction of Rogowski Coils, from Three Aspects
Jun 17 , 2022
What is the Rogowski coil? The Rogowski coil is a flexible clip-on hybrid inductor coil that can be easily coiled around a current conductor for measuring. It is capable of measuring large currents of several thousand amperes without expanding the size of the voltage transformer. Rogowski coils are electronic voltage transformers used to measure alternating currents such as fast transients, single...
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Three main parameters that interfere with the accuracy of Rogowski coils
Jun 18 , 2022
Electronic current transformers are based on Rogowski coils with small size, light weight, wide frequency band, factors that more or less affect the accuracy of the coil in the measurement operation, such as the size of the circuit conductor under test relative to the coil, and external electromagnetic interference. , The circuit under test has the advantages of large conductor volume range, no ma...
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Application of Rogowski Coil in Active Power Filtering
Jul 21 , 2022
The extensive application of nonlinear loads in power grids brings a series of problems harmonic wave. The main hazards of harmonic wave include: Increase the load of power facilities, reduce the power factor of the system, reduce the effective capacity and efficiency of power generation, transmission and electrical equipment, resulting in equipment waste, line waste and power loss; Causes th...
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The ratio difference, angle difference of the transformer and the safety on the current transformer line
Jul 25 , 2022
Ratio difference: The fault of the transformer includes both the ratio difference and the angle difference. The ratio error is abbreviated as the ratio error, which is usually indicated by the symbol f. It is equal to the difference between the actual secondary current and the primary current converted to the secondary side and the ratio of the primary current converted to the secondary side. It i...
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Application analysis of leakage protection in electric vehicle charging pile
Jul 25 , 2022
As the world's largest consumer of new energy electric vehicles, new energy electric vehicles are developing rapidly, and the safety of electric vehicle charging piles is a top priority: whether the electric vehicle charging pile can avoid random plugging and unplugging during the charging process. The accident caused by the charging gun, whether it can be automatically powered off after charging,...
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Leakage current generation classification
Jul 25 , 2022
Generally, there are four types of leakage currents: semiconductor component leakage current, power supply leakage current, capacitor leakage current and filter leakage current 1. Leakage current of semiconductor components The very small current that flows through the PN junction when it is turned off. D-S is forward biased, G-S is reverse biased, and after the conductive channel is opened, curre...
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Current transformer structure principle
Nov 10 , 2022
1, The ordinary current transformer structure principle is relatively simple, by the mutual insulation of the primary winding, secondary winding, core and frame, shell, terminals and other components. Its working principle and transformer is basically the same, a winding turns (N1) less, directly in series in the power line, a load current (I1) through a winding, the alternating flux induction gen...
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Equipment required to calibrate current transformers
Nov 10 , 2022
1, Transformer calibrator: measure the error between the standard transformer and the transformer under test, display the working current. 2、Standard current transformer: used as a standard in transformer calibration, the accuracy is generally higher than the measured more than two levels, designed with multiple ratio taps, to adapt to different transformer calibration. 3, Booster: with the regula...
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