JPS6192137U - - Google Patents

Description

[Brief explanation of drawings]

FIG. 1 is a concrete electrical circuit diagram of one embodiment of this invention. 2 to 7 are views showing an undervoltage tripping device applied to an embodiment of this invention, and FIG. 2 is a side sectional view showing a state in which both armatures are in the attracted position. . FIG. 3 is a side sectional view showing the state in the tripped position. FIG. 4 is a plan view with the front cover removed. FIG. 5 is a bottom view with the front cover removed. FIG. 6 is a front view with the front cover removed. FIG. 7 is an exploded perspective view of the main body parts. In the figure, 3 is a permanent magnet, 4 is a fixed armature,
5 is a movable armature, 9 is a tripping spring, 11 is an excitation coil, 101 is a transformer, 102 is a diode bridge, 107 is an operational amplifier, 110,1
31, 159 are comparators, 124, 126,
134, 139, 140, 145, 149, 16
1 is a transistor, 135, 141, 150, 1
62 is a thyristor, 144 is a limit switch,
190 indicates an external trip command switch.

Claims (1)

[Claims for Utility Model Registration] A movable armature, a fixed armature with which the movable armature contacts, a permanent magnet for attracting and holding the movable armature to the fixed armature, and a permanent magnet that attracts and holds the movable armature to the fixed armature. an elastic member for separating from the fixed armature; and an excitation coil wound around the movable armature and for attracting and detaching the movable armature from the fixed armature when a current flows therethrough; a magnetic flux switching magnetic trip device comprising: a comparison means for comparing a voltage corresponding to the voltage of the main circuit into which the circuit breaker is inserted and a reference voltage corresponding to the predetermined voltage; and a voltage of the main circuit. suction command means that outputs a suction command signal in response to the comparison means determining that the voltage corresponding to the voltage of the main circuit is higher than the reference voltage; the voltage corresponding to the voltage of the main circuit is lower than the reference voltage; A tripping command means outputs a tripping command signal after a predetermined period of time has elapsed in response to the determination by the comparison means. External tripping command means for giving a tripping command signal from the outside; and in response to commands from the attraction command means, momentarily applied to the excitation coil so that magnetic flux is generated in a direction in which the magnetic flux of the permanent magnet increases. At the same time, a current is applied to attract and hold the movable armature to the fixed armature,
In response to a command from the tripping command means, a reverse current is instantaneously passed through the excitation coil so that magnetic flux is generated in a direction in which the magnetic flux of the permanent magnet decreases, so that the movable armature is connected to the fixed armature. and an undervoltage relay equipped with a drive means for opening the relay from the undervoltage relay, and further, when an external tripping command is given from the external tripping command means in a state where a suction command is issued from the suction command. Accordingly, an undervoltage tripping device is provided with tripping priority means for giving priority to the output of a tripping command signal over the suction command.