Switchgear operating apparatus and three-phase switchgear
AssigneeMitsubishi Electric Corporation
InventorsTakakazu Inoue, Yasushi Takeuchi
Life of this patent
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Abstract
A switchgear operating apparatus provided with an electronic switching device (7) connected to a negative electrode side of a DC power supply and a plurality of operating coils (4) which are simultaneously energized and controlled by the electronic switching device (7) for performing on/off operations of a three-phase switchgear includes diodes (6a, 6b, 6c) connected between the individual operating coils (4) and the electronic switching device (7), and a voltage detector (9) for detecting potential differences applied to the individual diodes (6a, 6b, 6c) and the electronic switching device (7).
Claims15
A switchgear operating apparatus provided with switching means having a first end connected to a negative electrode side of a DC power supply and a plurality of operating coils, which are is simultaneously energized and controlled by said switching means for performing on/off operations of a switchgear, said operating coils each having a first end connected to a positive electrode side of the DC power supply and a second end connected to a second end of said switching means, said switchgear operating apparatus comprising:
- rectifying devices respectively connected in series between said operating coils and said switching means, the forward direction of said rectifying devices being a direction from said operating coils to said switching means;
- and
- detection means for detecting a potential difference applied between a positive side of each rectifying device and said first end of said switching means.
A three-phase switchgear of which on/off operations are performed by a switchgear operating apparatus provided with a switching section having a first end connected to a negative electrode side of a DC power supply and a plurality of operating coils which are simultaneously energized and controlled by said switching section, said operating coils each having a first end connected to a positive electrode side of the DC power supply and a second end connected to a second end of said switching section, said switchgear operating apparatus comprising:
- rectifying devices connected in series between said individual operating coils and said switching means;
- and
- a detecting section for detecting a potential difference applied between a positive side of each rectifying device and said first end of said switching section.
Dependencies are inferred from the claim text.