| 摘要 |
The invention provides a thermal protector comprising an enclosure provided with a cylinder case having one open end and a cover for closing the open end and for fitting on the surface of a protected body, a protector section comprising two fixed terminal plates having fixed contacts respectively and secured on the bottom of the cylinder case, an adjusting screw provided on the bottom of the cylinder case, and the dished main bimetal provided with movable contacts facing to the fixed contacts for switching operation, and pressed and supported onto the head of the adjusting screw by a spring, and a heater wire provided near the main bimetal and connected between the one fixed terminal plate and the heater terminal, and a thermostat section having the bimetal which is disposed nearest to the cover at the position parallel to the surface of the protected body, wherein the protector section and the thermostat section are disposed on the bottom side and on the cover side of the cylinder case respectively and connected in series. The protector section is operated in response to over current of the load motor and the thermostat section is operated in response to abnormal temperature rising when only the temperature rises, thus the protector ensures the protection.
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