Novel protection scheme for residual current device-based electric fault time detection and touch current identification

2017 ◽  
Vol 11 (10) ◽  
pp. 2478-2488 ◽  
Author(s):  
Xiaohui Han ◽  
Wanxing Sheng ◽  
Songhuai Du ◽  
Juan Su ◽  
Guangeng Liu
Keyword(s):  
Residual Current ◽  
Protection Scheme ◽  
Current Device

Calibration of Residual Current Device (RCD) Testers

NCSLI Measure ◽  
2018 ◽  
Vol 12 (4) ◽  
pp. 28-37
Author(s):  
Steven Yang ◽  
Y. C. Chau
Keyword(s):  
Residual Current ◽  
Current Device

scholarly journals Improving sensitivity of residual current transformers to high frequency earth fault currents

2017 ◽  
Vol 66 (3) ◽  
pp. 485-494 ◽  
Author(s):  
Stanislaw Czapp ◽  
Krzysztof Dobrzynski ◽  
Jacek Klucznik ◽  
Zbigniew Lubosny ◽  
Robert Kowalak
Keyword(s):  
High Frequency ◽  
Low Voltage ◽  
Current Transformer ◽  
Residual Current ◽  
Fault Current ◽  
Earth Fault ◽  
Fault Currents ◽  
Proper Operation ◽  
Current Device ◽  
A Current

Abstract For protection against electric shock in low voltage systems residual current devices are commonly used. However, their proper operation can be interfered when high frequency earth fault current occurs. Serious hazard of electrocution exists then. In order to detect such a current, it is necessary to modify parameters of residual current devices, especially the operating point of their current transformer. The authors proposed the modification in the structure of residual current devices. This modification improves sensitivity of residual current devices when high frequency earth fault current occurs. The test of the modified residual current device proved that the authors’ proposition is appropriate.

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