| 摘要 |
A miniature thermal relay mounted on the windings of electrical equipment for protection against excessive temperature in emergency operation modes. The relay comprises a housing with a metallic cup-shaped bottom part and an electrically insulating cover. The housing includes two fixed contacts attached to ends of electrodes secured in the cover body symmetrically and at equal distances from the cover center, and a thermally sensitive switching mechanism. The said mechanism comprises a support member secured in the central part of cover, a conducting contact bridge having carrier elements, mounted on the support member in a way allowing translation motion, a compression spring attached to the support member and peripheral part pressing the contact bridge to fixed contacts, and a thermally sensitive bimetallic snap-action disk, freely mounted between the carrying elements and the spring and retained by a support member passing through a hole in the dome.
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