JPS58123550U - circuit breaker - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

Figure 1 is a side sectional view showing the circuit breaker of this invention in the closed state, Figures 2 and 3 are side views showing the normal open state and automatic opening state, respectively, and Figure 4 is the side view of the circuit breaker of this invention. A plan view showing a state in which the main part of the undervoltage disconnecting device is reset in the suction state, and FIGS. 5 to 7 show the undervoltage disconnecting device in the automatic opening state at each pole equipped with the undervoltage disconnecting device. A state in which a voltage higher than the specified value is applied and the movable iron core is attracted, a state in which the movable iron core is released in the automatic opening state because the insufficient pressure tripping device does not have a voltage higher than the specified value, and normally open circuit or closed circuit. Figures 8 and 9 are side cross-sectional views of the main parts of the water column, showing a state in which the specified voltage is applied to the undervoltage disconnection device. - Figures 8 and 9 show the automatic opening state of a pole equipped with a conventional undervoltage disconnection device. A side view of the main part showing the state in which the movable iron piece of the undervoltage disconnection device is reset by the movable contact device and the state at the moment when the undervoltage disconnection device operates, Figures 10 and 11 are other conventional undervoltage disconnection devices. A plan view and a side view of the main parts of a circuit breaker equipped with a voltage disconnection device, and FIG. FIG. 6 is a side cross-sectional view of the main part when the circuit breaker is operated to the reset position and the operating handle is held at this position. In the figure, 1: mold base, 2:
Mold force bar, 6: Fixed contact, 6: Movable contact, 7
: Movable contact needle, 9: Contact holder, 12: Bimetal, 17: Trip rod, 18: Fixed iron core, 20: Movable iron piece, 22: Operation handle, 23: Opening/closing υ bar, 26:
Trip lever, 2B, 29 Nidoguru link, 32: Opening/closing arm, 34: Contact spring, 35: Operation spring, 37: Excitation coil, 38: Fixed iron core, 39:
Yoke, 4o: Movable iron core, 44: Movable iron core spring, 4
5 Ni dripping latch, 49: Undervoltage tripping lever, 5o: Undervoltage tripping lever spring.

Claims (1)

[Claims for Utility Model Registration] A movable contact device rotatably supported, a trip lever including a toggle link device and rotatable to automatically open the movable contact device, and One end of the toggle link device is supported by the movable contact device, and the other end is supported by the trip relay/<-. In a circuit breaker with different distances, a fixed core, a movable core that approaches and separates from the fixed core, an excitation coil and a yoke surrounding the fixed core, and a movable core spring that acts on the movable core in the direction of opening and opening. a dripping latch that is pivotally supported to rotate in conjunction with the movable iron core, and a movable contact device that is pivotally supported so that one side corresponds to the tripping lever of the circuit breaker and the other side is automatically opened. and an undervoltage release lever that is provided to respond to the movement of the undervoltage release lever and receives a biasing force in the tripping direction by an undervoltage release lever spring, and the undervoltage release lever and the dripping latch are engaged. It is set up so that it can be released freely,
When the movable core is in the attracted state at a voltage above a predetermined value, the dripping latch and the undervoltage release lever are in an engageable state, and when the movable core moves to the release position at a voltage below the predetermined value, the above-mentioned engagement is released. When the undervoltage release lever is released, the undervoltage release lever operates the trip lever of the circuit breaker, and the movable contact device moves to the automatic open position to interrupt the main circuit.At the same time, the undervoltage release lever is returned to its original position. A circuit breaker with a disconnection device.