RU174855U1 - Withdrawable circuit breaker - Google Patents

Abstract

The withdrawable circuit-breaker relates to electrical engineering, namely to the disconnecting contacts, allowing disconnecting the circuit-breaker from the main circuit to create visible electrical clearances in the extended position in accordance with the established requirements. The withdrawable circuit breaker comprises a fixed part, which is a base with terminals for connecting external conductors, and a movable part, a circuit breaker that can be separated from or in contact with the fixed part, and at least two disconnecting contacts, providing in position when the movable part is in contact with the fixed part, the circuit is shorted. Each disconnecting contact consists of a socket and a pin contact made of an electrically conductive material. The pin contact is provided with an opening designed to accommodate the fastener, thereby allowing the pin to be directly attached to the switch, and the plug-in socket is screwed onto the fixed part and is electrically connected to the terminal for connecting external conductors. EFFECT: increased reliability with simplified design and manufacturing technology of disconnecting contacts. 3 ill.

Description

The utility model relates to electrical engineering, in particular to withdrawable circuit breakers, namely disconnecting contacts, which allow disconnecting the circuit breaker from the main circuit to create visible electrical clearances in the extended position in accordance with established requirements. Retractable design allows for quick replacement of one switch with another without dismantling the lead-in conductors.

The prior art circuit breaker series VA57-39 is known (nomenclature catalog 1-2004 "Circuit Breakers" of the Open Joint-Stock Company "DZNVA", p. 59), containing a fixed part, which is a base with terminals for connecting external conductors, and a moving part - a switch that can stand away from the fixed part or be in contact with it, and the disconnecting contacts, providing in the position when the movable part is in contact with the fixed part, is closed electric circuit. Each disconnecting contact consists of a socket and a pin contact made of an electrically conductive material.

In the well-known circuit-breaker series VA57-39, pin contacts are mounted on the fixed part and are permanently (soldered) connected to the terminals secured to the plastic base (fixed part) by crimping. Sockets consisting of spring-loaded petals are mounted on bushings having a screw connection with the terminals of the switch (movable part).

A disadvantage of the known device is the possibility of damage (scattering of petals) of the outlet during operation, during installation or transportation of the switch separately from the base, since the sockets are installed on the switch and are not protected by anything.

The objective of this utility model is to prevent damage (scattering of petals) of the socket of the disconnecting contacts during operation, as well as to obtain the possibility of transportation and delivery to the consumer separately of the base with sockets and a switch with pin contacts.

The technical result is to increase reliability with a simplification of the design and manufacturing technology of disconnecting contacts.

To achieve the above technical result, a withdrawable circuit-breaker is proposed comprising a fixed part, which is a base with leads for connecting external conductors, and a moving part is a switch that can be separated from or in contact with the fixed part, and at least two disconnecting contacts, providing in the position when the movable part is in contact with the fixed part, the closure of the electrical circuit, each disconnecting to The contact consists of a socket and a pin contact made of an electrically conductive material, in which the pin contact is provided with an opening designed to accommodate the fastener, thereby allowing the pin to be directly attached to the switch, and the socket is screwed onto the fixed part and is electrically connected to output for connecting external conductors.

Replacing the one-piece connection of the pin contact with the detachable (screw connection) location of the pin contact on the switch, and the outlet on the base (fixed part), simplified the design and manufacturing technology of the disconnecting contacts, minimized the likelihood of damage to the socket during installation and operation, and made it possible to transport the switch and the base separately, since the outlet is located on the fixed part - the base and is protected by the base structure from external influences.

The utility model is illustrated by the following graphic materials:

in FIG. 1 shows the device of the disconnecting contacts of a withdrawable circuit breaker in an extended position;

in FIG. 2 shows the device of the disconnecting contacts of the withdrawable circuit breaker in the operating position;

in FIG. 3 shows a pin contact in section. The slide-out switch comprises a fixed part, which is a base 1 with terminals 2 for connecting external conductors, a movable part is a switch 3 and disconnecting contacts, each of which consists of a socket 4 and a pin 5 (see Fig. 1). Socket 4 and pin 5 are made of conductive material. The socket 4 consists of spring-loaded springs 6 petals 7 mounted on the sleeve 8, having a screw connection 9 with leads 2 for connecting external conductors (see Fig. 3). The pin contact 5 has an opening in which the fastening element 10 is placed (see FIG. 3), by means of which the contact of the pin 5 is fixed to the terminals 11 of the switch 3 (see FIG. 2). The device operates as follows.

When the switch 3 is moved from the extended position to the working position, the pin contacts 5, mounted on the terminals 11 of the switch 3 by a screw connection 10, push the tabs 7 of the socket 4 apart. sockets 4. The sleeve 8 of socket 4 is connected to terminal 2 for connecting external conductors and the base 1 using a screw connection 9.

Claims (1)

A withdrawable circuit-breaker comprising a fixed part, which is a base with terminals for connecting external conductors, and a moving part - a switch that can be separated from or in contact with the fixed part, and at least two disconnecting contacts, providing in position when the movable part is in contact with the fixed part, an electrical circuit is closed, each disconnecting contact consisting of a socket and a pin contact made of wire dyaschego electrically conductive material, characterized in that the contact pin is provided with an opening intended for receiving a clamping element, thereby enabling directly attach the contact pin on the switch and plug contact socket fixed screw connection to the stationary part and electrically connected to the terminal for connection of external conductors.

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