RU71815U1 - AUTOMATIC FAST SWITCH - Google Patents

Abstract

The utility model relates to electrical engineering, in particular to protective switching equipment. It contains a base, movable and fixed contacts, including an electromagnet with a magnetic circuit and an armature, holding an electromagnet with a magnetic circuit and an armature, disconnecting a spring. The holding electromagnet is pivotally mounted on the switching electromagnet, while the magnetic circuit of the holding electromagnet is connected to the armature of the switching electromagnet through the wings. The technical result is to increase the stability of the structure to vibration and reduce the size of the switch. 1. P. F., 3. FIG. heck.

Description

The utility model relates to electrical engineering, in particular to protective switching equipment, and can be used to protect against overloads and short circuits of electrical installations, direct and alternating current lines, electrical equipment of urban electric vehicles.

High-speed automatic switches that are held in the on position due to magnetic flux in the working gap of the armature created by the current of the holding coil, and which trip when the specified magnetic flux decreases, are known, for example, from the book: A. Golubev High-speed circuit breakers, M.-L., Energia Publishing House, 1964, pp. 42-43, Utility Model Patent RU No. 336161 H01H 77/00, 2003

As the closest analogue, it is necessary to consider the switch described in patent RU No. 333261 H01H 77/00, 2003

This switch contains a base, movable and fixed contacts, including an electromagnet with a magnetic circuit and an armature, holding an electromagnet with a magnetic circuit and an armature, disconnecting a spring.

The main disadvantage of this design is that due to the separate placement of the electromagnets, the circuit breaker is large in length.

Another disadvantage is the sensitivity to vibration, which reduces its reliability and limits applicability.

The task of creating a utility model was the development of a reliable and compact circuit breaker.

The technical result, which is achieved by a useful model, is to increase the stability of the structure to vibration and reduce the size.

To achieve the stated result, including an electromagnet

fixedly mounted on the base, and the holding electromagnet is pivotally mounted on the switching electromagnet, while the magnetic circuit of the holding electromagnet is connected to the armature of the switching electromagnet through the wings. In this design, reinforcing stiffness leads to increased reliability of the circuit breaker and reduces the size of the circuit breaker.

The utility model is illustrated by an example implementation.

Figure 1 schematically shows a patented switch in the on position; figure 2 is the same in the off position; figure 3 is the same in the position when the switch is turned off by the emergency shutdown signal.

The automatic high-speed switch contains a base 1, movable 2 and fixed 3 contacts, including an electromagnet with a magnetic circuit 4 and an armature 5, holding an electromagnet with a magnetic circuit 6 and an armature 7, disconnecting the spring 8. The holding electromagnet rotates on the axis 9 in the bracket 10 mounted on the switching electromagnet . The switching electromagnet is rigidly mounted on the base 1. The magnetic circuit 6 of the holding solenoid is connected to the armature 5 of the turning solenoid using a guide 11 in which

the roller 12 on the axis 13 of the armature 5. The armature 7 is connected to the movable contact through the insulating rod 14. The breaking spring 8 is fixed to the movable contact through the earring 15.

The switch operates as follows.

In the on position (figure 1), the magnetic circuit 4 and the armature 5 are attracted to each other due to the current in the coil of the turning on electromagnet. The armature 7, in turn, is held in an attracted position to the magnetic circuit 6 due to the current in the coil of the holding electromagnet. Contacts 2, 3 are closed, and spring 8 is cocked to disconnect.

For operational shutdown, it is necessary to interrupt the holding current in the coil of the switching electromagnet. Under the action of the breaking spring 8, the movable contact 2 and the holding electromagnet go into the off position until the armature of the holding electromagnet reaches the stop 16, while the armature 7 and the magnetic circuit 6 of the holding electromagnet remain attracted to each other (see Fig. 2).

The signal from the current sensor (or other emergency shutdown sensor) interrupts the current in the coils of the holding and turning on electromagnets. Under the action of the breaking spring 8, the movable contact 2 and the armature 7 of the holding electromagnet go into the off position (figure 2). After that, the armature of the switching electromagnet with deceleration also goes into the off position, as shown in Fig.2. If a current-switching electromagnet passes through a coil, the switch will turn on.

Thanks to these design differences, a circuit breaker with reduced dimensions and increased reliability has been created.

Claims (1)

A quick-acting automatic switch containing a base, movable and fixed contacts, including an electromagnet with a magnetic circuit and an armature, holding an electromagnet with a magnetic circuit and an armature, breaking a spring, characterized in that the switching electromagnet is fixedly mounted on the base, and the holding electromagnet is pivotally mounted on the switching electromagnet, this magnetic circuit holding the electromagnet through the wings is connected to the armature of the electromagnet.