TY - GEN
T1 - Characteristics and Detection Methods for Glowing Contact in Low Voltage Electric Circuit
AU - Zhu, Kai
AU - Lv, Liang
AU - Yang, Pengtao
AU - Ji, Shengchang
AU - Xu, Yang
N1 - Publisher Copyright:
© Beijing Paike Culture Commu. Co., Ltd. 2025.
PY - 2025
Y1 - 2025
N2 - Glowing contact in low voltage electric circuit is mostly caused by poor electrical contact, which is easy to cause fire. The existing electrical detection method is based on the voltage of glowing contact, while the location of glowing contact is often unknown, causing detection difficulties. An experimental platform for glowing contact is built, and the reasons of high-frequency component are explained. A time-frequency domain detection method for glowing contact based on the current of the parallel filter capacitor on the load side is proposed. The high-frequency components generated by glowing contact in the capacitive current are detected. The characteristic frequency bands of glowing contact are analyzed to be 5–15 kHz and 20 kHz ~ 30 kHz. The electrical signal characteristics of glowing contact under different wire cross-sectional areas, wire materials and loop current amplitudes are studied. The amplitude of high-frequency component is proportional to the cross-sectional areas of the wire, which is conducive to the detection of glowing contact. The temperature of glowing contact is proportional to loop current amplitude, which gradually approaches the boiling point of cuprous oxide. The high-frequency component generated by brass wires are richer than those generated by copper wires, but the power spectrum of the characteristic frequency band decreases, which are not conducive to the detection of glowing contact.
AB - Glowing contact in low voltage electric circuit is mostly caused by poor electrical contact, which is easy to cause fire. The existing electrical detection method is based on the voltage of glowing contact, while the location of glowing contact is often unknown, causing detection difficulties. An experimental platform for glowing contact is built, and the reasons of high-frequency component are explained. A time-frequency domain detection method for glowing contact based on the current of the parallel filter capacitor on the load side is proposed. The high-frequency components generated by glowing contact in the capacitive current are detected. The characteristic frequency bands of glowing contact are analyzed to be 5–15 kHz and 20 kHz ~ 30 kHz. The electrical signal characteristics of glowing contact under different wire cross-sectional areas, wire materials and loop current amplitudes are studied. The amplitude of high-frequency component is proportional to the cross-sectional areas of the wire, which is conducive to the detection of glowing contact. The temperature of glowing contact is proportional to loop current amplitude, which gradually approaches the boiling point of cuprous oxide. The high-frequency component generated by brass wires are richer than those generated by copper wires, but the power spectrum of the characteristic frequency band decreases, which are not conducive to the detection of glowing contact.
KW - Capacitive Current
KW - Glowing Contact
KW - Low Voltage Electric Circuit
KW - Time-frequency Analysis
UR - https://www.scopus.com/pages/publications/105011054839
U2 - 10.1007/978-981-96-4787-3_27
DO - 10.1007/978-981-96-4787-3_27
M3 - 会议稿件
AN - SCOPUS:105011054839
SN - 9789819647866
T3 - Lecture Notes in Electrical Engineering
SP - 261
EP - 273
BT - The Proceedings of the 19th Annual Conference of China Electrotechnical Society - Volume VIII
A2 - Yang, Qingxin
A2 - Yang, Xu
A2 - Bie, Zhaohong
PB - Springer Science and Business Media Deutschland GmbH
T2 - 19th Annual Conference of China Electrotechnical Society, ACCES 2024
Y2 - 20 September 2024 through 22 September 2024
ER -