CN115547739A - Novel current and voltage monitoring solid insulation circuit breaker - Google Patents

Abstract

The invention discloses a novel current and voltage monitoring solid insulated circuit breaker, which at least comprises: three groups of sealing pole columns, an operation box body fixed with the sealing pole columns and an isolation grounding operation mechanism. In each group of solid-sealed pole columns, the incoming conductor, the vacuum arc extinguish chamber, the isolation switching part, the outgoing conductor crank arm, the current and voltage monitoring part and the like are all fixedly sealed in the same epoxy resin pouring body. By implementing the invention, the current and the voltage of the bus can be monitored while switching on and off, the space can be saved, and the installation efficiency and the safety can be improved.

Description

Novel current and voltage monitoring solid insulation circuit breaker

Technical Field

The invention relates to the technical field of circuit breakers, in particular to a novel current and voltage monitoring solid insulated circuit breaker.

Background

The existing circuit breaker for the ring main unit only has the switching-on and switching-off functions, cannot simultaneously monitor current and voltage, needs to additionally arrange current and voltage transformers, and cannot meet the requirement of primary and secondary deep fusion of power distribution equipment;

and because mutual-inductor and circuit breaker components of a whole that can function independently installation, it is bulky, need the manual work to carry out electrical connection between each spare part, the installation is wasted time and energy, and cost of labor and material cost are all very big, simultaneously because spare part is numerous, will introduce some interference and unstable factor certainly, make equipment bury down hidden danger in service.

Disclosure of Invention

The technical problem to be solved by the invention is that the invention provides a novel current and voltage monitoring solid insulated circuit breaker, the bus current and voltage monitoring device is sealed and fixed by epoxy resin, the functions are various, the space is saved, and the installation efficiency and the safety are improved.

In one aspect of the present invention, a novel current and voltage monitoring solid insulated switchgear is provided, which at least includes:

each group of solid-sealed pole bodies comprises an incoming line conductor, an insulating mechanism frame, a vacuum arc extinguish chamber, a contact seat, a static contact, a grounding contact and an outgoing line conductor crank arm, wherein the vacuum arc extinguish chamber, the contact seat, the static contact, the grounding contact and the outgoing line conductor crank arm are arranged on the insulating mechanism frame; the lower end of the vacuum arc extinguish chamber is connected with the static contact, and the contact seat is movably connected with an isolation knife; a current transformer and a voltage sensor are arranged on the outgoing conductor crank arm; the outer layer of each group of solid-sealed pole bodies is fixedly sealed with epoxy resin, so that the components form a whole;

the operation box body is fixedly connected with the three groups of solid-sealed pole columns and at least internally provided with a breaker shaft and an isolation shaft; the breaker shaft is used for controlling the breaker insulation pull rod so as to realize on-off switching between the connecting conductor and the upper end of the vacuum arc extinguish chamber; the isolating shaft is connected with an isolating knife insulating pull rod pivoted with an isolating knife through a connecting rod so as to control the isolating knife to be connected with a grounding contact or a static contact or to be positioned in the middle;

and the isolation grounding operating mechanism is used for switching the change-over switch and controlling the circuit breaker shaft and the isolation shaft to rotate.

Preferably, the insulation mechanism frame is at least provided with an upper space and a lower space, and three vacuum arc-extinguishing chambers which are sequentially arranged are arranged in the upper space;

three groups of isolation switching mechanisms are arranged in the lower space;

each group of isolation switching mechanisms comprises a contact seat arranged on the insulation mechanism frame, an isolation knife is rotatably arranged on the contact seat, and the isolation knife is movably connected with one end of an isolation knife insulation pull rod; the other end of the isolation knife insulation pull rod is connected with the isolation shaft through a connecting rod, so that the isolation grounding output in the isolation grounding operating mechanism is received.

Preferably, a voltage sensor and a current transformer are arranged on the body of the outgoing conductor crank arm of each fixed pole cylinder, wherein:

a high-voltage capacitor for voltage measurement is arranged in the voltage sensor, a lead at one end of the high-voltage capacitor is fixedly connected with the outgoing conductor crank arm, and the other end of the high-voltage capacitor is fixedly connected to the first insert and used for leading out a secondary output voltage signal;

the current transformer is sleeved on the body of the outgoing conductor crank arm, and the inside of the current transformer consists of an iron core and a coil and is used for current measurement and protection;

a shielding net is further arranged on the body of the outgoing conductor crank arm, and one end of the shielding net is fixedly connected with the second insert;

the voltage sensor, the current transformer, the shielding net, the first insert, the second insert and the body of the outgoing conductor crank arm are fixedly sealed in epoxy resin together.

Preferably, the body of each outlet conductor crank arm is electrically connected with a contact seat.

Preferably, the isolating and grounding operating mechanism comprises at least a transfer switch, an isolating mechanism operating member and a circuit breaker mechanism operating member.

The embodiment of the invention has the following beneficial effects:

the embodiment of the invention provides a novel current and voltage monitoring solid insulated circuit breaker. A current and voltage monitoring component is arranged on the outgoing conductor crank arm body, and can monitor the current and voltage of a bus simultaneously;

in the embodiment of the invention, the incoming line conductor, the vacuum arc-extinguishing chamber, the isolation switching component, the outgoing line conductor connecting lever, the current and voltage monitoring component and the like are all fixedly sealed in the same epoxy resin pouring body, so that integration can be realized, the components are installed and fixed together, the sensor is not required to be manually installed and fixed by additionally finding the position, and the current and voltage of a bus can be monitored while switching on and off; the multifunctional and space-saving effect can be realized; the sensor and the pole are connected with a wire in the epoxy resin, and extra manual wiring is not needed, so that the installation is very simple and convenient; and epoxy resin protects each part, and one part improves the safe reliability.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an embodiment of a novel current and voltage monitoring solid insulated switchgear provided in the present invention;

fig. 2 is a schematic diagram of an internal connection structure of the circuit breaker in fig. 1.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and/or processing steps closely related to the scheme according to the present invention are shown in the drawings, and other details not so relevant to the present invention are omitted.

Fig. 1 is a schematic diagram showing an external structure of the novel current and voltage monitoring solid insulated circuit breaker of fig. 1 according to an embodiment of the present invention; together with the schematic internal structure diagram in fig. 2 (the components shown by the dotted lines in fig. 2 are internal components), in this embodiment, the novel current and voltage monitoring solid insulated circuit breaker at least includes:

each group of solid-sealed pole bodies comprises an incoming line conductor 11, an insulating mechanism frame 10, a vacuum arc-extinguishing chamber 14, a contact seat 15, a static contact 16, a grounding contact 17 and an outgoing line conductor crank arm 12, wherein the vacuum arc-extinguishing chamber 14, the contact seat 15, the static contact 16, the grounding contact 17 and the outgoing line conductor crank arm 12 are arranged on the insulating mechanism frame 10, and the incoming line conductor 11 is connected with the upper end of the vacuum arc-extinguishing chamber 14 through a connecting conductor 13; the lower end of the vacuum arc extinguish chamber 14 is connected with a static contact 16; the contact seat 15 is movably connected with an isolation knife 150; the outgoing conductor crank arm 12 is provided with a current transformer 121 and a voltage sensor 124; the outer layer of each group of solid-sealed pole bodies is fixedly sealed with epoxy resin 19, so that the components form a whole, and specifically, the components can be molded by pouring epoxy resin; it is understood that although three incoming conductors are shown in the figure, the other parts are a solid-sealed pole body part, and other parts included in other solid-sealed pole bodies are the same as those shown in fig. 2, so that reference can be made for understanding;

the operation box body 2 is fixedly connected with the three groups of solid seal pole columns, specifically, the operation box body can be fixed through bolts 4, and sealing rings can be added for sealing; the operating box body 2 is at least internally provided with a breaker shaft 21 and an isolation shaft 22; the breaker shaft 21 is used for controlling a breaker insulation pull rod 23 so as to realize the on-off between the connecting conductor 13 and the upper end of the vacuum arc extinguish chamber 14; the isolation shaft 22 is connected with an isolation knife insulation pull rod 18 pivoted with an isolation knife 150 through a connecting rod so as to control the isolation knife 15 to be connected with a grounding contact 17 or a static contact 16 or be in a middle position;

and the isolation grounding operating mechanism 3 is used for switching a change-over switch and controlling the rotation of the breaker shaft 21 and the isolation shaft 22. The disconnecting and grounding operation mechanism 3 includes at least a changeover switch 31, a disconnecting mechanism operation member, and a breaker mechanism operation member 32.

More specifically, the insulating mechanism frame 10 is provided with at least an upper space in which three vacuum arc-extinguishing chambers 14 are arranged in sequence and a lower space;

three groups of isolation switching mechanisms are arranged in the lower space; each group of isolation switching mechanisms comprises a contact seat 15 arranged on the insulation mechanism frame 10, an isolation knife 150 is rotatably arranged on the contact seat 15, and the isolation knife 15 is connected with one end of an isolation knife insulation pull rod 18; the other end of the isolation knife insulating pull rod 18 is connected with an isolation shaft through a connecting rod so as to receive the isolation grounding output in the isolation grounding operating mechanism.

In the embodiment of the invention, the isolation and grounding operating mechanism drives the connecting rod to linearly and horizontally move, the isolation knife is driven to rotate along the contact seat through the insulation pull rod, and the isolation knife can rotate to be connected with a fixed contact or a grounding contact or to be rotated to a middle isolation position. The three-station switching operation of opening, closing and grounding can be realized by operating the change-over switch to control the actions of the isolation mechanism and the breaker mechanism

More specifically, on the body 120 of the outgoing conductor crank arm 12 of each clamped pole column there are provided a voltage sensor 124 and a current transformer 121, wherein:

a high-voltage capacitor for voltage measurement is arranged in the voltage sensor 124, a lead at one end of the high-voltage capacitor is fixedly connected with the outgoing conductor crank arm 12, and the other end of the high-voltage capacitor is fixedly connected to the first insert 126 and used for leading out a secondary output voltage signal;

the current transformer 121 is sleeved on the body 120 of the outgoing conductor crank arm 12, and the inside of the current transformer is composed of an iron core and a coil and is used for current measurement and protection;

the outgoing conductor crank arm 12 is also provided with a shielding net 123, and the first 123 end of the shielding net is fixedly connected with the second insert 122;

the voltage sensor 124, the current transformer 121, the shielding mesh 123, the first insert 126, the second insert 122 and the body 120 of the outgoing conductor crank arm 12 are all sealed in epoxy resin 19.

Wherein the body 120 of each outlet conductor crank arm 120 is electrically connected to a contact block 15.

In the present invention, the general operating principle is as follows: when the switching-on operation is needed, firstly, the circuit breaker mechanism is subjected to energy storage, then the isolating shaft is manually operated to rotate to push the isolating knife insulating pull rod to enable the isolating knife to be disconnected from the grounding contact and pushed to the static contact to be in conduction connection with the static contact, then the change-over switch and the interlocking mechanism are pressed to enable the circuit breaker shaft to rotate, and the circuit breaker insulating pull rod is pushed to enable the connecting conductor to be in conduction connection with the upper end of the vacuum arc extinguish chamber. When the switching-off operation is required, the connection between the connecting conductor and the upper end of the vacuum arc extinguish chamber is firstly disconnected, then the connection between the isolating knife and the static contact is disconnected, and finally the isolating knife is pushed to the position of the grounding contact for conducting connection.

The embodiment of the invention has the following beneficial effects:

the embodiment of the invention provides a novel current and voltage monitoring solid insulated circuit breaker. A current and voltage monitoring component is arranged on the outgoing conductor crank arm body, and can monitor the current and voltage of a bus simultaneously;

in the embodiment of the invention, the incoming line conductor, the vacuum arc extinguish chamber, the isolation switching part, the outgoing line conductor connecting lever, the current and voltage monitoring part and the like are all fixedly sealed in the same epoxy resin casting body, so that integration can be realized and the outgoing line conductor connecting lever and the current and voltage monitoring part are installed and fixed together; the multifunctional and space-saving device can be realized; the sensor and the pole are connected with a wire in the epoxy resin, and an additional manual wire connection is not needed, so that the installation is very simple and convenient; and the epoxy resin protects all parts, thereby further improving the safety and reliability.

The above description is only a preferred embodiment of the present invention and should not be taken as limiting the scope of the appended claims, therefore, all equivalent changes and modifications that do not depart from the spirit of the present invention should be embraced in the claims.

Claims (5)

1. A novel current and voltage monitoring solid insulated circuit breaker is characterized by at least comprising:

each group of solid-sealed pole bodies comprises an incoming line conductor, an insulating mechanism frame, a vacuum arc extinguish chamber, a contact seat, a static contact, a grounding contact and an outgoing line conductor crank arm, wherein the vacuum arc extinguish chamber, the contact seat, the static contact, the grounding contact and the outgoing line conductor crank arm are arranged on the insulating mechanism frame; the lower end of the vacuum arc extinguish chamber is connected with the static contact, and the contact seat is movably connected with an isolation knife; a current transformer and a voltage sensor are arranged on the outgoing conductor crank arm; the outer layer of each group of solid-sealed pole bodies is fixedly sealed with epoxy resin, so that all the parts form a whole;

the operation box body is fixedly connected with the three groups of solid-sealed pole columns and at least internally provided with a breaker shaft and an isolation shaft; the breaker shaft is used for controlling the breaker insulation pull rod so as to realize on-off switching between the connecting conductor and the upper end of the vacuum arc extinguish chamber; the isolation shaft is connected with an isolation knife insulation pull rod through a connecting rod, the isolation knife insulation pull rod is pivoted with the isolation knife and controls the isolation knife to be connected with a grounding contact or a static contact or to be positioned in the middle;

and the isolation grounding operating mechanism is used for switching the change-over switch and controlling the rotation of the breaker shaft and the isolation shaft.

2. The circuit breaker according to claim 1, characterized in that said insulating mechanism frame is provided with at least an upper space and a lower space, in which three vacuum interrupters are arranged in sequence;

the isolation mechanism comprises three groups of isolation switching mechanisms arranged in the lower space, wherein each group of isolation switching mechanisms comprises a contact seat arranged on an insulation mechanism frame, an isolation knife is rotatably arranged on the contact seat, the isolation knife is movably connected with one end of an isolation knife insulation pull rod, and the other end of the isolation knife insulation pull rod is connected with an isolation shaft through a connecting rod.

3. The circuit breaker of claim 2, wherein a voltage sensor and a current transformer are provided on the body of the outlet conductor crank arm of each clamped pole column, wherein:

a high-voltage capacitor for voltage measurement is arranged in the voltage sensor, a lead at one end of the high-voltage capacitor is fixedly connected with the outgoing conductor crank arm, and the other end of the high-voltage capacitor is fixedly connected to the first insert and used for leading out a secondary output voltage signal;

the current transformer is sleeved on the body of the connecting lever of the outgoing conductor, consists of an iron core and a coil inside and is used for current measurement and protection;

a shielding net is further arranged on the body of the outgoing conductor crank arm, and one end of the shielding net is fixedly connected with the second insert;

the voltage sensor, the current transformer, the shielding net, the first insert, the second insert and the body of the outgoing conductor crank arm are fixedly sealed in epoxy resin together.

4. The circuit breaker of claim 3, wherein the body of each outlet conductor lever is electrically connected to a contact block.

5. The circuit breaker of claim 4, wherein the isolation grounding operating mechanism comprises at least a transfer switch, an isolation mechanism operating member, and a circuit breaker mechanism operating member.

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