Title:
THERMAL OVERCURRENT RELAY
Document Type and Number:
WIPO Patent Application WO/2003/083887
Kind Code:
A1
Abstract:
A thermal overcurrent relay comprises a bimetal curving in response to a main circuit current, an interlocking plate for transmitting the displacement of this bimetal, an adjustment lever which is supported by a support shaft protruding from a case and freely rotatable within a required range according to the range of the usable main circuit current, an operation lever which is supported by the adjustment lever, and turned by the force applied by the interlocking plate, and operates on an inversion mechanism unit for inverting the opened&sol closed state of a contact, and an adjustment knob for changing the interlocking plate displacement distance required until inversion is started. The support shaft for supporting the adjustment lever has a cross section of a generally sector−shaped projection having an acute central angle and opened toward an inner wall of the case in the traveling direction of the interlocking plate, and the adjustment lever has a generally sector−shaped shaft hole formed to have an angle larger than the central angle of the support shaft. The support shaft is inserted into the shaft hole.
Inventors:
OHKUBO HIDEAKI (JP)
Application Number:
PCT/JP2002/003085
Publication Date:
October 09, 2003
Filing Date:
March 28, 2002
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
OHKUBO HIDEAKI (JP)
OHKUBO HIDEAKI (JP)
International Classes:
H01H83/22; H01H71/16; H01H71/74; (IPC1-7): H01H61/00
Foreign References:
| JP2000276992A | 2000-10-06 | |||
| JPS58134849U | 1983-09-10 | |||
| JPS61124946U | 1986-08-06 | |||
| JPS58197624A | 1983-11-17 |
Attorney, Agent or Firm:
Miyata, Kaneo c/o Mitsubishi Denki Kabushiki Kaisha (2-3 Marunouchi 2-Chom, Chiyoda-ku Tokyo, JP)
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