ELECTRONIC TRIP DEVICE USING A DOUBLE CORE PLUNGER FOR INDUCING HIGHER MAGNETIC FIELD IN AN ELECTRIC LEAKAGE AND CURRENT CIRCUIT BREAKER, CAPABLE OF INCREASING MAGNETIC FORCE WITHOUT THE INCREASE OF THE EXTERNAL DIAMETER OF THE PLUNGER

摘要

PURPOSE: An electronic trip device using a double core plunger in an electric leakage and current circuit breaker is provided to increase the contribution degree of the plunger with respect to the increase of magnetic force by increasing the lateral cross section of the armature of the plunger.;CONSTITUTION: A current supplied to the load side of a current circuit breaker passes through a coil(17). A cylinder(15) includes a plunger, a spring, the coil, and oil. The cylinder is fixed to a yoke(31), and an armature(33) is in connection with the yoke using an extension spring(32). If current flowing through the coil is more than permissible capacitance, the plunger is in contact with the armature. If the plunger is in contact with the armature, the current is broken.;COPYRIGHT KIPO 2011