Results 11 to 20 of about 28,360 (309)
Frequency Response Testing of Zero-Sequence Current Transformers for Mining Ground Fault Protection Relays [PDF]
International Journal of Electronics and Telecommunications, 2020 In Polish coal mining, medium voltage power distribution networks operate with an insulated neutral point. Zero-sequence current transformers are the basic sensors that generate input signals for earth-fault protection relays.
Krzysztof Kuliński, Adam Heyduk
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DC-compensated current transformer [PDF]
2014 IEEE International Instrumentation and Measurement Technology Conference (I2MTC) Proceedings, 2014 Instrument current transformers (CTs) measure AC currents. The DC component in the measured current can saturate the transformer and cause gross error. We use fluxgate detection and digital feedback compensation of the DC flux to suppress the overall error to 0.15%.
Pavel Ripka +2 more
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Anti-vibration method for sensing ring of fiber optical current transformer integrating structural design and adaptive signal processing [PDF]
PLoS OneLin Cheng +7 more
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Shielded Electronic Current Transformer [PDF]
IEEE Transactions on Instrumentation and Measurement, 2004 A current transformer with nominal ratio 10 A to 10 mA, intended for low-frequency applications, was developed. It includes an electronic device to reduce the magnetizing current, and a continuous shield in the secondary winding (coaxial cable) in order to eliminate the effect of stray capacitances. No guard-source is connected to the shield.
Slomovitz, Daniel, de Souza, Heriguatí
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Simulation of longitudinal differential protection of transmission lines with additional stabilization and APU system [PDF]
Tehnika, 2016 This paper explains the algorithm for the longitudinal differential protection of transmission lines with automatic reclosing. Classic stabilization is not sufficient for avoiding of unnecessary operations caused by saturation of current transformer ...
Rajić Tomislav D., Stojanović Zoran N.
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Вестник Северо-Кавказского федерального университета, 2022 Despite the fact that the problem of saturation of current transformers (CT) has been known for a long time, it has not lost its relevance now. Cases of malfunctioning as a result of oversaturation of CT are still recorded today.
P. Shagimardanov
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Countermeasure to Prevent Transformer Differential Protection From False Operations
IEEE Access, 2023 The reliability of the transformer differential protection is under threat from multiple interferences, including the inrush condition, the current transformer saturation condition, and the arc fault condition.
Penghui Liu +5 more
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The Journal of Engineering, 2018 On the basis of the principle of breaker failure protection delay and the analysis of the main factors which affect the protection, a sub-station-area breaker failure and dead-zone protection technical scheme based on the current differential principle ...
Baowei Li +4 more
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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
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The Journal of Engineering, 2019 The Rogowski coil current transformer is widely used in intelligent substations for its rapid response, wide bandwidth measurement, and non-magnetic saturation.
Fubin Pang +3 more
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