CN211046497U - A four-stage commutation switch - Google Patents

Abstract

The utility model discloses a four-stage commutation switch. The four-stage commutation switch comprises: a casing, and one side of the casing is provided with an N-phase access terminal, an A-phase access terminal, a B-phase access terminal and a C-phase access terminal. The other side of the casing is provided with a neutral wire lead-out end and a live wire lead-out end; the casing is equipped with an arc extinguisher A-C, a solution pipe A-C, a contactor A-C, a protector, A blocking device; the N-phase access terminal is connected with the neutral wire lead-out terminal through the neutral line; the switch in the utility model has the advantages of low cost, safety, convenient and fast commutation, and saving commutation time.

Description

A four-stage commutation switch

technical field

The utility model relates to the field of switchgear, in particular to a four-stage commutation switch.

Background technique

In the prior art, in the process of electric power construction, commutation is often required, and the design of the existing commutation switch is unreasonable, which leads to a long commutation time and affects the efficiency of construction.

Utility model content

Through the current situation investigation, it is found that in order to make a breakthrough in the time consumption of the commutation construction stage, further improve the work efficiency, reduce the line loss rate, compress the commutation time, and quickly and dynamically adjust the load of each phase, it is necessary to find a safe, sensitive and fast way. commutation switch.

There are many intelligent commutation switches on the market, but the purchase price of such equipment is high, and the maintenance cost is also high, so the economic benefits of using such equipment in urban power distribution stations are better. However, for the rural power grid, the signal collection is poor and the natural environment is harsh, so the applicability of the equipment is not large. Therefore, in order to meet the above requirements, the present utility model provides a four-stage commutation switch. The four-stage commutation switch include:

a housing, one side of the housing is provided with an N-phase access terminal, an A-phase access terminal, a B-phase access terminal and a C-phase access terminal, and the other side of the housing is provided with a neutral wire lead-out end and a live wire lead-out end; An arc extinguisher A-C, a solution tube A-C, a contactor A-C, a protector, and a blocking device are installed in the shell; the N-phase access terminal is connected to the zero-line lead-out terminal through the zero line; one end of the melt tube A is connected to the A-phase access terminal Connection, the other end of the solution tube A is connected to the contactor A, the contact piece of the contactor A is installed on the connection line between the arc extinguisher A and the live wire, and the contact of the contactor A extends to the contact piece of the contactor A; the solution tube B One end is connected to the access end of phase B, the other end of the molten tube B is connected to the contactor B, the connection line between the arc extinguisher B and the live wire is installed with the contact piece of the contactor B, and the contact of the contactor B is connected to the contactor B. The contact piece is extended; one end of the melting tube C is connected with the access end of the C phase, the other end of the melting tube C is connected with the contactor C, and the contact piece of the contactor C is installed on the connection line between the arc extinguisher C and the live wire. The contacts extend toward the contact piece of the contactor C; the contactors A-C are respectively connected with the locking device through the pulling wire, and the protector is installed on the live wire.

Preferably, the locking device is a mechanical locking device.

Preferably, the protector is an electromagnetic protector.

Preferably, the arc extinguishers A-C, the contactors A-C and the blocking device are all installed in the housing by screws.

Preferably, the model of the solution tube is RW3-10/100A.

Preferably, the model of the solution tube is EA9A47.

Preferably, the four-stage commutation switch is provided with an automatic phase-opening switch, and the automatic phase-opening switch includes No. 1-4 switches. When working, the incoming wires of the No. 1, 2, and No. 3 switches in the automatic phase-opening switch are connected to A and B respectively. , C-phase phase lines, the outgoing lines are connected together, when the A-phase is connected, the No. 1 switch is closed, and the No. 2 switch and No. 3 switch are automatically disconnected; when the B-phase is connected, the No. 2 switch is closed, and the No. 1 switch, If the No. 3 switch is all disconnected, then close the No. 4 switch, and automatically disconnect the No. 1 switch, No. 2 switch, and No. 3 switch.

Preferably, the contact piece is provided with a contact block, the top of the contact block is provided with a groove, and the contact is provided with a bump matching the groove, when the contact is in contact with the contact piece, the bump is embedded in the groove , and fit with the inner wall of the contact block.

Preferably, the rod body of the locking device is made of polyethylene board.

One or more technical solutions provided by this application at least have the following technical effects or advantages:

The switch in the utility model has the advantages of low cost, safety, convenient and quick commutation, and saving time of commutation.

Description of drawings

The accompanying drawings described here are used to provide a further understanding of the embodiments of the present invention, and constitute a part of this application, and do not constitute a limitation to the embodiments of the present invention;

1 is a schematic structural diagram of a four-stage commutation switch in the present application;

Fig. 2 is the structural representation of the contactor in this application;

Among them, 1-shell, 2-neutral line, 3-, 3-N phase access terminal, 4-A phase access terminal, 5-B phase access terminal, 6-C phase access terminal, 7-solvent pipe A, 8-dissolving pipe B, 9-dissolving pipe C, 10-arc extinguisher A, 11-arc extinguisher B, 12-arc extinguisher C, 13-fire wire, 14-contactor A, 15-contactor B , 16-contactor C, 17-locking device, 18-protector, 19-contact piece, 20-contact block, 21-contact, 22-bump.

Detailed ways

In order to be able to understand the above-mentioned objects, features and advantages of the present invention more clearly, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments may be combined with each other under the condition that they do not conflict with each other.

In the following description, many specific details are set forth in order to fully understand the present utility model. However, the present utility model can also be implemented in other ways different from the scope of this description. Therefore, the protection scope of the present utility model does not It is limited by the specific examples disclosed below.

Referring to FIG. 1 , an embodiment of the present application provides a four-stage commutation switch, where the four-stage commutation switch includes:

a housing, one side of the housing is provided with an N-phase access terminal, an A-phase access terminal, a B-phase access terminal and a C-phase access terminal, and the other side of the housing is provided with a neutral wire lead-out end and a live wire lead-out end; An arc extinguisher A-C, a solution tube A-C, a contactor A-C, a protector, and a blocking device are installed in the shell; the N-phase access terminal is connected to the zero-line lead-out terminal through the zero line; one end of the melt tube A is connected to the A-phase access terminal Connection, the other end of the solution tube A is connected to the contactor A, the contact piece of the contactor A is installed on the connection line between the arc extinguisher A and the live wire, and the contact of the contactor A extends to the contact piece of the contactor A; the solution tube B One end is connected to the access end of phase B, the other end of the molten tube B is connected to the contactor B, the connection line between the arc extinguisher B and the live wire is installed with the contact piece of the contactor B, and the contact of the contactor B is connected to the contactor B. The contact piece is extended; one end of the melting tube C is connected with the access end of the C phase, the other end of the melting tube C is connected with the contactor C, and the contact piece of the contactor C is installed on the connection line between the arc extinguisher C and the live wire. The contacts extend toward the contact piece of the contactor C; the contactors A-C are respectively connected with the locking device through the pulling wire, and the protector is installed on the live wire.

The total time required for commutation in the traditional method is 100 minutes, and there are certain security risks. After using the phase change switch in the utility model, the insulating rod will be used to pull and connect the phases directly, which saves the time and cost of confirming the dangerous point, arranging the dangerous measures, going up and down the tower, dismantling the dangerous point measures, and arranging the tools. The security risk reduces the overall time, and the security risk is almost zero.

It is composed of automatic phase-break switch, mechanical locking device and contacts. The contact points are divided into four gears (A1, B1, C1, D1). A1, B1, C1 are connected to the three-phase, and D1 is connected to the reset point. When A1 is closed, B1, C1, and D1 are automatically disconnected. If the current is too large, it can also be disconnected and connected to the phase by the automatic phase-break switch.

The scheme of the utility model is 1, 2 and 3 linkage switches, the reference equipment is a drop-out fuse RW3-10/100A and a Schneider circuit breaker EA9A47, and the parameter design is designed according to the reference equipment. When working, the incoming wires of switches 1, 2 and 3 are respectively connected to the phase wires of A, B and C, and the outgoing wires are connected together. When connecting to phase A, close switch 1 and automatically disconnect switch 2 and switch 3. When connecting to phase B, close switch No. 2, and switch No. 1 and No. 3 are automatically disconnected. If they are all disconnected, switch No. 4 is closed, and switch No. 1, No. 2, and No. 3 are automatically disconnected.

The parameter preset of the commutation switch in the present utility model:

Parameter preset reference equipment: drop fuse RW3-10/100A, Schneider circuit breaker EA9A47;

Rated voltage 230/400V;

Rated current 6-100A;

Fuse blowing current 400A;

Segmentation capacity 6kA;

Mechanical life 20000 times;

Wiring capacity 6-32A: 25mm, 32-100A: 35mm;

Fusing time: 0.14s;

Rated residual operating current: 30mA;

Fast arc extinguisher: CJ10.

The commutation switch in the utility model has the following advantages: it has the ability to quickly disconnect and access phases, has obvious disconnection points, overcurrent protection, leakage protection, has a blocking function, is completely closed, and has reference equipment tests.

Through the mechanical blocking device, the C phase is closed, and the A and B phases are triggered to be disconnected. The blocking device pulls the contactor to close, completes phase C and neutral N in the three-phase four-wire system, and becomes a two-wire system (live and neutral). The arc extinguisher mainly attracts the arc when the contactor is closed, and the fuse tube is the first protection. The electromagnetic protection is the second stage of protection, which is mainly an overload and leakage protection electromagnetic ejection device. When the current reaches the highest value, the ejection device pops up, forcing the traction rope to pull the latching device to reset, and realize the disconnection of all phases A, B, and C.

Please refer to FIG. 2, the contact piece is provided with a contact block, the top of the contact block is provided with a groove, and the contact is provided with a bump that matches the groove. When the contact is in contact with the contact piece, the bump is embedded in the concave. In the groove, it is abutted with the inner wall of the contact block. This design makes the contact firm and not easy to fall off when the contactor is in contact.

While the preferred embodiments of the present invention have been described, additional changes and modifications to these embodiments may occur to those skilled in the art once the basic inventive concepts are known. Therefore, the appended claims are intended to be construed to include the preferred embodiment and all changes and modifications that fall within the scope of this invention.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present utility model fall within the scope of the claims of the present utility model and their equivalents, the present utility model is also intended to include these modifications and variations.

Claims (9)

1. A four-stage commutation switch, wherein the four-stage commutating switch comprises: a housing, one side of the housing is provided with an N-phase access terminal, an A-phase access terminal, a B-phase access terminal and a C-phase access terminal, and the other side of the housing is provided with a neutral wire lead-out end and a live wire lead-out end; An arc extinguisher A-C, a solution tube A-C, a contactor A-C, a protector, and a blocking device are installed in the housing; the N-phase access end is connected to the zero-line lead-out end through the zero line; one end of the melt tube A is connected to the A-phase access end Connection, the other end of the dissolution tube A is connected to the contactor A, the contact piece of the contactor A is installed on the connection line between the arc extinguisher A and the live wire, and the contact of the contactor A extends to the contact piece of the contactor A; the dissolution tube B One end is connected to the access end of phase B, the other end of the molten tube B is connected to the contactor B, the connection line between the arc extinguisher B and the live wire is installed with the contact piece of the contactor B, and the contact of the contactor B is connected to the contactor B. The contact piece is extended; one end of the melting tube C is connected with the access end of the C phase, the other end of the melting tube C is connected with the contactor C, and the contact piece of the contactor C is installed on the connection line between the arc extinguisher C and the live wire, and the contactor C The contacts extend toward the contact piece of the contactor C; the contactors A-C are respectively connected with the locking device through the pulling wire, and the protector is installed on the live wire. 2 . The four-stage phase change switch according to claim 1 , wherein the blocking device is a mechanical blocking device. 3 . 3. The four-stage commutation switch according to claim 1, wherein the protector is an electromagnetic protector. 4 . The four-stage phase change switch according to claim 1 , wherein the arc extinguishers A-C, the contactors A-C and the blocking device are all installed in the housing by screws. 5 . 5 . The four-stage phase change switch according to claim 1 , wherein the model of the molten tube is RW3-10/100A. 6 . 6 . The four-stage phase change switch according to claim 1 , wherein the model of the molten tube is EA9A47. 7 . 7. The four-stage commutation switch according to claim 1, characterized in that, the four-stage commutation switch is provided with an automatic phase-opening switch, and the automatic phase-opening switch comprises No. 1-4 switches. When working, the automatic phase-opening switch is The incoming wires of switches 1, 2, and 3 in the middle are connected to phase A, B, and C phase wires respectively, and the outgoing wires are connected together. When connecting to phase A, switch No. 1 is closed, and switches No. 2 and 3 are automatically disconnected; When entering phase B, close the No. 2 switch, and automatically disconnect the No. 1 switch and No. 3 switch. If they are all disconnected, close the No. 4 switch and automatically disconnect the No. 1 switch, No. 2 switch and No. 3 switch. 8. The four-stage commutation switch according to claim 1, wherein the contact piece is provided with a contact block, the top of the contact block is provided with a groove, and the contact is provided with a bump matching the groove, when the contact When in contact with the contact piece, the protruding block is embedded in the groove and abuts with the inner wall of the contact block. 9 . The four-stage phase change switch according to claim 1 , wherein the rod body of the locking device is made of polyethylene board. 10 .

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