Title:
SYNCHRONOUS SWITCHGEAR
Document Type and Number:
WIPO Patent Application WO/2000/004564
Kind Code:
A1
Abstract:
A synchronous switchgear which senses the power supply voltages of the phases and supply the phases at respectively predetermined electrical phase angles, comprising switches (1a-1c) providedfor the respective phases for connecting/disconnecting an impedance load, switching mechanisms (2a-2c) for closing/opening the switches (1a-1c), transformers (5a-5c) for the measurement of the power supply voltages of the phases and the interphase voltages, and a phase controller (42) which outputs a command to supply the power supply voltage to the impedance load within ranges of the electrical phase angles predetermined for the respective phases when the zero points of the power supply voltages of the phases are off the interphase voltages are detected.
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Inventors:
ITO HIROKI (JP)
KOHYAMA HARUHIKO (JP)
HIDAKA MIKIO (JP)
KOHYAMA HARUHIKO (JP)
HIDAKA MIKIO (JP)
Application Number:
PCT/JP1998/003204
Publication Date:
January 27, 2000
Filing Date:
July 16, 1998
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
ITO HIROKI (JP)
KOHYAMA HARUHIKO (JP)
HIDAKA MIKIO (JP)
ITO HIROKI (JP)
KOHYAMA HARUHIKO (JP)
HIDAKA MIKIO (JP)
International Classes:
H01H9/56; (IPC1-7): H01H33/59
Foreign References:
| JPH0652759A | 1994-02-25 | |||
| JPS61296624A | 1986-12-27 | |||
| JPS5593619A | 1980-07-16 |
Attorney, Agent or Firm:
Soga, Michiteru (8th floor 1-1, Marunouchi 3-chome Chiyoda-ku Tokyo, JP)
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