FIELD: electricity.
SUBSTANCE: tripping mechanism comprises a base (1), a tripping coil (2), a restoring part (3) and a latch (4). The latch (4) is mounted with the possibility of rotating on the base (1) by means of a cylindrical pin; and the restoring part (3) is movably mounted on the base (1). The tripping mechanism also includes a restoring spring, one end of which acts on the base (1), and the other end acts on the restoring part (3). A force-receiving element (41) is firmly mounted on the latch (4), the projection of which can actuate the force-receiving element for rotation, made on the restoring part (3); and a cavity (32), in which the force-receiving element can swing, is formed on the projection.
EFFECT: by applying the restoring force of the restoring part to the tripping force of the mechanism, the tripping mechanism of the earth fault protection device increases the tripping force of the whole mechanism and improves the tripping speed and stability.
8 cl, 5 dwg
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