CN217544465U

CN217544465U - Novel digital circuit breaker

Info

Publication number: CN217544465U
Application number: CN202221647620.0U
Authority: CN
Inventors: 王春军
Original assignee: Ferranti Electric Shanghai Co ltd
Current assignee: Ferranti Electric Shanghai Co ltd
Priority date: 2022-06-28
Filing date: 2022-06-28
Publication date: 2022-10-04
Anticipated expiration: 2032-06-28

Abstract

The utility model discloses a novel digital circuit breaker, including electronic chassis, mechanism case and a plurality of utmost point post, the mechanism case with utmost point post is located respectively electronic chassis upper end, just utmost point post is arranged respectively and is located mechanism case one side upper surface, inside explosion chamber, voltage sensor, current sensor and the insulating pull rod of being equipped with of utmost point post, the mechanism incasement is equipped with digital protection unit and deciliter state monitoring facilities, voltage sensor with current sensor pass through the cable with digital protection unit links to each other to through the insulating pull rod up-and-down motion drive divide-shut brake of explosion chamber lower extreme, sensor signal output carries out short circuit dropout protection to the circuit breaker to digital protection unit, and divide-shut brake circuit monitoring, state monitoring monitor circuit and divide-shut brake control circuit and divide-shut brake speed, contact wearing and tearing are monitored, through optic fibre or wireless and digital intelligent terminal signal transmission, realize the all-round monitoring of health condition to the circuit breaker.

Description

Novel digital circuit breaker

Technical Field

The utility model relates to the field of switch technology, specifically a novel digital circuit breaker.

Background

The circuit breaker is a mechanical device which adopts an operating mechanism to drive an arc extinguish chamber to realize current switching on and off, and is relatively popular in application in a power distribution network, but the current circuit breaker cannot sense a conductive loop state to carry out timely circuit and equipment protection, cannot accurately judge the switching-on and switching-off conditions, cannot sense the self service life abrasion state, needs to realize the switching-on and switching-off of the circuit breaker through a control loop, receives a protection device from the outside, and is switched off through a switching-off coil, the wiring is complex, the reaction time is long, the switching-on and switching-off states of the circuit breaker and the mechanical abrasion conditions need to be measured and verified during regular maintenance and overhaul, and power failure or accidents can be caused.

Disclosure of Invention

The utility model aims at providing a novel digital circuit breaker to solve the problem of above-mentioned ordinary circuit breaker.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a novel digital circuit breaker, includes electronic chassis, mechanism case and a plurality of utmost point post, the mechanism case with utmost point post is located respectively electronic chassis upper end, just utmost point post is arranged respectively and is located mechanism case one side upper surface, inside explosion chamber, voltage sensor, current sensor and the insulating pull rod of being equipped with of utmost point post, the mechanism incasement is equipped with digital protection unit and deciliter state monitoring facilities, utmost point post is being wrapped up the epoxy insulation of explosion chamber is sealed admittedly, voltage sensor is located the utmost point post lower part, just voltage sensor outside epoxy casting current sensor, voltage sensor with current sensor is through the cable junction who is equipped with the mechanism incasement portion, and direct with digital protection unit links to each other, the inside lower extreme of explosion chamber is through the insulating pull rod up-and-down motion drive branch, the combined floodgate that is equipped with, insulating pull rod lower extreme stretches into the mechanism case to link to the lever that is equipped with the mechanism incasement portion links to each other, the lever other end with deciliter state monitoring facilities cooperation monitors the contact, contact condition and the contact wearing and tearing condition of contact.

Preferably, the digital protection unit adopts a low-voltage signal acquired by the sensor to carry out digital calculation, and adopts a low-energy trip coil to be connected with a main shaft of the circuit breaker, so as to realize the quick tripping of the circuit breaker.

Preferably, the Rogowski coil current sensor is installed in a groove reserved on the pole in an open manner.

Preferably, a contact spring is installed in the mechanism box, and the transmission displacement of the insulating pull rod and the lever monitors the distance change of the opening and closing of the circuit breaker and the abrasion condition of a contact through a displacement sensor arranged on the opening and closing state monitoring equipment.

Preferably, one side of the upper end of the pole is provided with a contact arm, the outer side end of the contact arm is provided with a plum blossom contact finger, and the plum blossom contact finger is provided with a temperature measuring sensor.

Preferably, mechanism case upper end is equipped with control plug and control circuit monitor respectively, the control circuit monitor with control plug directly links to each other, and the integrated design is measured the divide-shut brake current voltage waveform information each time.

Preferably, the mechanism upper end is equipped with an intelligent terminal, control circuit monitor, digital protection unit and deciliter state monitoring facilities all adopt digital processing, and through optic fibre with intelligent terminal links to each other.

Preferably, the intelligent terminal monitors a conductive loop of the contact by controlling the temperature measuring sensor, and monitors the local discharge amount of the pole of the circuit breaker by the partial discharge sensor.

Preferably, the intelligent terminal monitors the vacuum degree of the arc extinguish chamber by measuring the voltage between the vacuum fractures.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the integrated current and voltage sensor solid-sealed polar pole has good integrity and insulativity and small volume.

2. The digital protection unit is directly matched with current and voltage for use, voltage and current change is not needed, direct digital processing and calculation are carried out, and the circuit breaker is subjected to delay and instantaneous protection according to different short circuit conditions.

3. The on-off state of the digital switch, the monitoring of the control loop and the comprehensive monitoring of the health condition of the circuit breaker,

drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention.

In the drawings:

fig. 1 is a schematic diagram of an embodiment of a novel digital circuit breaker of the present invention;

fig. 2 is a schematic diagram illustrating the integration of the current and voltage sensors of the embodiment of the novel digital circuit breaker according to the present invention;

fig. 3 is a schematic diagram of a control circuit and an opening/closing state of the novel digital circuit breaker according to the embodiment of the present invention;

reference numbers in the figures: 1. an intelligent terminal; 3. a plum-blossom contact finger; 4. a pole column; 5. a voltage sensor; 6. a current sensor; 7. an electric chassis; 8. a cable; 9. an arc extinguishing chamber; 10. an insulating pull rod; 11. a control plug; 12. a control loop monitor; 13. a digital protection unit; 14. a separation/combination state monitoring device; 15. a lever; 16. and a temperature measuring sensor.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.

Example (b): as shown in figure 1, a novel digital circuit breaker comprises an electric chassis 7, a mechanism box and a plurality of poles 4, wherein the mechanism box and the poles 4 are respectively positioned at the upper end of the electric chassis 7, the poles 4 are respectively arranged on the upper surface of one side of the mechanism box, an arc extinguish chamber 9, a voltage sensor 5, a current sensor 6 and an insulating pull rod 10 are arranged inside the poles 4, one side of the upper end of each pole 4 is provided with a contact arm, the outer side end of each contact arm is provided with a plum blossom-shaped contact finger 3, the plum blossom-shaped contact finger 3 is provided with a temperature measuring sensor 16, the mechanism box is internally provided with a digital protection unit 13 and a separation and combination state monitoring device 14, the poles 4 are insulated and fixedly sealed by epoxy resin wrapping the arc extinguish chamber 9, the voltage sensor 5 is positioned at the lower part of the poles 4, and the current sensor 6 is epoxy-cast outside the voltage sensor 5, the current sensor 6 is installed in a groove reserved on the pole 4 in an open mode, the voltage sensor 5 and the current sensor 6 are connected to the inside of the mechanism box through an arranged cable 8 and directly connected with the digital protection unit 13, the digital protection unit 13 performs digital calculation through a low voltage signal acquired by the sensor, the lower end of the inside of the arc extinguish chamber 9 is driven to be opened and closed through an arranged insulating pull rod 10 in an up-and-down motion mode, the lower end of the insulating pull rod 10 extends into the mechanism box and is connected with a lever 15 arranged in the mechanism box, the other end of the lever 15 is matched with the opening and closing state monitoring device 14, a contact spring is installed in the mechanism box, the transmission displacement of the insulating pull rod 10 and the lever 15 monitors the distance change of a breaker and the abrasion condition of a contact of the breaker through a displacement sensor arranged on the opening and closing state monitoring device 14, mechanism case upper end is equipped with control plug 11 and control circuit monitor 12 respectively, control circuit monitor 12 with control plug 11 directly links to each other, measures divide closing current voltage waveform information each time, the mechanism upper end is equipped with an intelligent terminal 1, control circuit monitor 12, digital protection unit 13 and divide closing state monitoring facilities 14 all adopt digital processing, and through optic fibre with intelligent terminal 1 links to each other, intelligent terminal 1 is through right temperature measurement sensor 16 controls, realizes monitoring the conductive loop of contact, intelligent terminal 1 is right through the voltage measurement between the vacuum fracture, and the realization is right the vacuum monitoring of explosion chamber 9.

Wherein, as shown in fig. 2, the pole 4 on the circuit breaker is insulated and sealed by epoxy resin wrapping the arc extinguish chamber 9, the lower part of the pole 4 adopts a cylindrical voltage division capacitance sensor, the Rogowski coil current sensor 6 is cast on the outer side of the voltage sensor 5, and the voltage sensor 5 and the current sensor 6 are connected to the inside of the mechanism box through a cable 8 and directly connected with the digital protection unit 13.

As shown in fig. 3, the arc extinguish chamber 9 drives the opening and closing through the up-and-down movement of the insulating pull rod 10, the insulating pull rod 10 amplifies the contact stroke through the lever 15, the opening and closing state monitoring device 14 directly adopts the displacement sensor to directly monitor the movement displacement of the end of the insulating pull rod 10, the contact condition of the displacement measurement contact and the contact abrasion condition are monitored, the control loop state monitoring device is directly connected with the breaker control plug 11, the current, voltage and waveform of the opening and closing coil and the energy storage motor are monitored, the control loop monitor 12, the digital protection unit 13 and the opening and closing state monitoring device 14 are all digitally processed, are connected with the intelligent terminal 1 through optical fibers, and are monitored by the optical fibers or wireless transmission and system control devices.

The specific implementation process comprises the following steps: through voltage sensor 5, current sensor 6 is connected with digital protection unit 13, sensor signal output carries out protection such as short circuit dropout to the digital protection unit to the circuit breaker, divide closing circuit monitoring, state monitoring is to circuit breaker divide-shut brake control circuit, and divide-shut brake speed, contact wearing and tearing etc. monitor, through optic fibre or wireless and digital intelligent terminal 1 signal transmission, the circuit breaker has signal monitoring, self-protection function, digital integrated terminal realizes the network deployment of the inside intelligent subassembly of cabinet, signal acquisition, the instruction is assigned and the control between whole distribution system, protect function.

Therefore, the utility model adopts the above structure a digital circuit breaker has protection, control circuit, closes the separating brake distance digitization, reduces the analog quantity transmission through a large amount of cables 8 such as electrical connection, electric elements, and the switch self is digital realizes the monitoring nearby of state, parameter, the digital conversion on the spot, and transmission efficiency is high, systematization, digital control, protection.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described above, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A novel digital circuit breaker is characterized in that: including electronic chassis, mechanism case and a plurality of utmost point post, the mechanism case with utmost point post is located respectively electronic chassis upper end, just utmost point post is arranged respectively and is located mechanism case one side upper surface, inside explosion chamber, voltage sensor, current sensor and the insulating pull rod of being equipped with of utmost point post, the mechanism incasement is equipped with digital protection unit and deciliter state monitoring facilities, utmost point post is by wrapping up the epoxy insulation of explosion chamber is sealed admittedly, voltage sensor is located the utmost point post lower part, just voltage sensor outside epoxy casting current sensor, voltage sensor with current sensor is through the cable junction who is equipped with the mechanism incasement portion, and direct with digital protection unit links to each other, the inside lower extreme of explosion chamber is divided, is combined floodgate through the insulating pull rod up-and-down motion drive that is equipped with, insulating pull rod lower extreme stretches into the mechanism case to link to the lever that is equipped with the mechanism incasement portion, the lever other end with deciliter state monitoring facilities cooperation monitors the displacement volume, the contact condition and the contact wearing and tearing condition of contact.

2. The novel digital circuit breaker according to claim 1, characterized in that: and the digital protection unit adopts the low-voltage signal acquired by the sensor to carry out digital calculation.

3. The novel digital circuit breaker according to claim 1, characterized in that: the current sensor is installed in a groove reserved on the pole in an open mode.

4. The novel digital circuit breaker according to claim 1, characterized in that: and a contact spring is installed in the mechanism box, and the transmission displacement of the insulating pull rod and the lever monitors the distance change of the opening and closing of the circuit breaker and the abrasion condition of a contact through a displacement sensor arranged on the opening and closing state monitoring equipment.

5. The novel digital circuit breaker according to claim 1, characterized in that: one side of the upper end of the pole is provided with a contact arm, the outer side end of the contact arm is provided with a plum blossom contact finger, and the plum blossom contact finger is provided with a temperature measuring sensor.

6. The novel digital circuit breaker of claim 5, characterized in that: the mechanism box upper end is equipped with control plug and control circuit monitor respectively, the control circuit monitor with control plug directly links to each other, measures divide closing current voltage waveform information each time.

7. The novel digital circuit breaker according to claim 6, characterized in that: the mechanism upper end is equipped with an intelligent terminal, control circuit monitor, digital protection unit and deciliter state monitoring facilities all adopt digital processing, and through optic fibre with intelligent terminal links to each other.

8. The novel digital circuit breaker of claim 7, characterized in that: the intelligent terminal realizes monitoring of a conductive loop of the contact by controlling the temperature measuring sensor.

9. The novel digital circuit breaker of claim 8, characterized in that: and the intelligent terminal realizes the vacuum degree monitoring of the arc extinguish chamber through voltage measurement between the vacuum fractures.