Affect of Voltage Sags on Electro-magnetic Contactor : A New Parameter for Sag Characteristics
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概要
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Sensitivity of electro-magnetic contactors for voltage sags is studied by experiments and simulations. An experimental circuit with a semiconductor fault switch that controls the phase angle of system voltage at the initial point of voltage sags is developed. The phase angle is a new parameter for voltage sags. The operating characteristics of the contactor are evaluated in various conditions. It is found that shallow sags may cause faster trips of contactors compared to deep sags in some cases. The reason of this phenomenon is analyzed with simulations.
- 2010-05-01
著者
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IYODA Isao
Osaka Electro-Communication University
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ANDO Yoshitaro
Enegate Co. Ltd.
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POUNYAKHET Sompathana
Kyushu Institute of Technology
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HIRATA Masaya
Osaka Prefectural College of Technology
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ISE Toshifumi
Osaka University
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Ise Toshifumi
Osaka Univ.
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