SAFETY SHUTTER APPARATUS FOR WITHDRAWABLE CIRCUIT BREAKER

摘要

PURPOSE: A shutter operation bar assembly of a safety shutter device for a withdrawable circuit breaker is provided to form a returning spring with a torsion spring to improve an elastic restoring force. CONSTITUTION: A cradle includes a first terminal. A second terminal is connected to the first terminal of the cradle. A hinge shaft support member(32) is fixed to the cradle. A hinge shaft(31) is supported by the hinge shaft support member. A shutter operation bar(30) is rotatably installed around a hinge shaft support point in the cradle.