CN105406447A - Closing coil protection apparatus - Google Patents
Closing coil protection apparatus Download PDFInfo
- Publication number
- CN105406447A CN105406447A CN201510807965.6A CN201510807965A CN105406447A CN 105406447 A CN105406447 A CN 105406447A CN 201510807965 A CN201510807965 A CN 201510807965A CN 105406447 A CN105406447 A CN 105406447A
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- CN
- China
- Prior art keywords
- phase
- auxiliary contact
- relay
- circuit breaker
- closing coil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
- H02H7/226—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices for wires or cables, e.g. heating wires
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- Keying Circuit Devices (AREA)
Abstract
The invention relates to a closing coil protection apparatus. The closing coil protection apparatus comprises a non-full phase protection circuit and a closing circuit; a control coil of a non-full phase time relay and an auxiliary contact branch are serially arranged on the non-full phase protection circuit; the auxiliary contact branch comprises a normally-closed auxiliary contact parallel branch and a normally-open auxiliary contact parallel branch that are in series connection; the non-full phase time relay is in parallel connection with a control coil branch of a non-full phase exit relay; a time delay closing contact of the non-full phase time relay and a control coil of the non-full phase exit relay are serially arranged on a non-full phase exit relay branch; and a normally-closed contact of the non-full phase exit relay is serially connected with the closing circuit. The closing coil can be disconnected from the power supply under an abnormal condition to prevent the coil from being burnt due to over-long time of power on; and in addition, the purpose that the closing circuit that is subjected to phase-closing rejection is disconnected by utilizing the existing elements without increasing elements is realized without increasing extra cost.
Description
Technical field
The present invention relates to a kind of closing coil protective device, belong to the protection field of breaker closing coil.
Background technology
The cut-out of the breaker closing order self-holding circuit of current domestic each backstage protection producer can only rely on the conversion of the normally closed auxiliary switch of circuit breaker; if due to equipment fault or misoperation; when in-house normally closed auxiliary switch cannot realize conversion, closing coil can be caused charged for a long time.Because the closing coil of circuit breaker all designs according to brief energization, if conduction time is long, just easy by closing coil scaling loss.
Summary of the invention
The object of this invention is to provide a kind of closing coil protective device, in order to solve the problem of closing coil easy scaling loss when conduction time is long.
For achieving the above object, the solution of the present invention comprises a kind of closing coil protective device, comprise non-whole phase protection loop and closing circuit, on described non-whole phase protection loop, string is provided with control coil and the auxiliary contact branch road of the non-three phase time relay, and described auxiliary contact branch road comprises the normally closed auxiliary contact parallel branch and Chang Kai auxiliary contact parallel branch that are connected in series; Wherein, normally closed auxiliary contact parallel branch is made up of a circuit breaker A phase normally closed auxiliary contact, a circuit breaker B phase normally closed auxiliary contact and the parallel connection of a circuit breaker C phase normally closed auxiliary contact, often opens that auxiliary contact parallel branch often leaves auxiliary contact by a circuit breaker A phase, circuit breaker B phase often drives auxiliary contact and a circuit breaker C phase is often opened auxiliary contact parallel connection and formed; The control coil branch circuit parallel connection of the described non-three phase time relay and a non-three phase exit relay, on described non-three phase exit relay branch road, string is provided with a timing closing contact and the non-three phase exit relay control coil of the described non-three phase time relay; Described closing circuit is in series with a normally-closed contact of described non-three phase exit relay.
Described closing coil protective device also comprises shutting-brake control loop, described shutting-brake control loop comprises close a floodgate controlling brancher, B phase combined floodgate controlling brancher and C phase of A phase and to close a floodgate controlling brancher, on described A phase combined floodgate controlling brancher, string is provided with close a floodgate control switch, A phase latching relay, another circuit breaker A phase of A phase and often opens auxiliary contact and A phase anti-trip relay, described A phase combined floodgate control switch is in parallel with the normally opened contact of described A phase latching relay, and it is in parallel with the normally opened contact of described A phase anti-trip relay that described another circuit breaker A phase often drives auxiliary contact; On described B phase combined floodgate controlling brancher, string is provided with close a floodgate control switch, B phase latching relay, another circuit breaker B phase of B phase and often opens auxiliary contact and B phase anti-trip relay, described B phase combined floodgate control switch is in parallel with the normally opened contact of described B phase latching relay, and it is in parallel with the normally opened contact of described B phase anti-trip relay that described another circuit breaker B phase often drives auxiliary contact; On described C phase combined floodgate controlling brancher, string is provided with close a floodgate control switch, C phase latching relay, another circuit breaker C phase of C phase and often opens auxiliary contact and C phase anti-trip relay, described C phase combined floodgate control switch is in parallel with the normally opened contact of described C phase latching relay, and it is in parallel with the normally opened contact of described C phase anti-trip relay that described another circuit breaker C phase often drives auxiliary contact.
Described closing circuit is in series with by A phase closing coil branch road, the parallel branch that B phase closing coil branch road and C phase closing coil branch circuit parallel connection are formed, on described A phase closing coil branch road, string is provided with A phase closing coil, on B phase closing coil branch road, string is provided with B phase closing coil, on C phase closing coil branch road, string is provided with C phase closing coil, on described A phase closing coil branch road, also string is provided with the normally closed auxiliary contact of described A phase anti-trip relay, on B phase closing coil branch road, also string is provided with the normally closed auxiliary contact of described B phase anti-trip relay, on C phase closing coil branch road, also string is provided with the normally closed auxiliary contact of described C phase anti-trip relay.
On described A phase closing coil branch road, also string is provided with another circuit breaker A phase normally closed auxiliary contact, on B phase closing coil branch road, also string is provided with another circuit breaker B phase normally closed auxiliary contact, and on C phase closing coil branch road, also string is provided with another circuit breaker C phase normally closed auxiliary contact.
Described closing coil protective device also comprises circuit breaker shutting-brake control branch road on the spot; this circuit breaker on the spot on shutting-brake control branch road string be provided with circuit breaker shutting-brake control switch and circuit breaker shutting-brake control relay on the spot on the spot, on described closing circuit, string is provided with the normally opened contact of described circuit breaker shutting-brake control relay on the spot.
In closing coil protective device provided by the invention; when circuit breaker generation non-three phase fault and when reaching the setting time of the non-three phase time relay; non-three phase exit relay control coil obtains electric; the normally-closed contact of the non-three phase exit relay in closing circuit disconnects; thus the closing circuit refusing to close phase is disconnected; closing coil can be made to disconnect with power supply in abnormal cases by above-mentioned control mode, prevent the situation of the long coil scaling loss brought conduction time.Further, when circuit breaker non-three phase failure vanishes, non-three phase exit relay control coil dead electricity, its normally closed contact involution closes, and closing circuit is connected.
In addition, the closing coil control device that this invention provides is not increasing on the basis of element, utilizes existing element to realize disconnecting the object of refusing the closing circuit closing phase, does not need additionally to increase cost.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of separating brake control loop;
Fig. 2 is the circuit diagram in shutting-brake control loop.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described in detail.
Closing coil protective device provided by the invention comprises two parts, and a part is: breaker open operation control loop, and another part is breaker closing control loop.
As shown in Figure 1, breaker open operation control loop comprises non-whole phase protection loop, this non-whole phase protection loop comprises control coil and the auxiliary contact branch road of the non-three phase time relay 47T be connected in series, and auxiliary contact branch road comprises the normally closed auxiliary contact parallel branch and Chang Kai auxiliary contact parallel branch that are connected in series; Wherein, normally closed auxiliary contact parallel branch is made up of circuit breaker A phase normally closed auxiliary contact 1, circuit breaker B phase normally closed auxiliary contact 1 and the parallel connection of circuit breaker C phase normally closed auxiliary contact 1, often opens that auxiliary contact parallel branch often leaves auxiliary contact 1 by circuit breaker A phase, circuit breaker B phase often drives auxiliary contact 1 and circuit breaker C phase is often opened auxiliary contact 1 parallel connection and formed.The control coil of non-three phase time relay 47T and non-three phase exit relay 47X branch circuit parallel connection, on this non-three phase exit relay 47X branch road, string is provided with a timing closing contact of non-three phase time relay 47T and the control coil of non-three phase exit relay 47X.
In FIG, A phase, B phase and C phase are jumped circle and are A phase, B phase and C phase switching winding, and separating brake is the electromagnetic action after utilizing switching winding to be energized, and is mechanical energy electric energy conversion, make the armature of switching winding to clash into the separating brake operating mechanism of circuit breaker, reach the object of breaker open operation.
As shown in Figure 2, breaker closing control loop comprises closing circuit, closing circuit comprises a normally-closed contact of closing coil parallel branch and the non-three phase exit relay 47X be connected in series, closing coil parallel branch is made up of A phase closing coil branch road, B phase closing coil branch road and C phase closing coil branch circuit parallel connection, wherein, on A phase closing coil branch road, string is provided with A phase closing coil, on B phase closing coil branch road, string is provided with B phase closing coil, and on C phase closing coil branch road, string is provided with C phase closing coil.
This breaker closing controlling brancher also comprises three shutting-brake control branch roads: close a floodgate controlling brancher, B phase combined floodgate controlling brancher and C phase of A phase is closed a floodgate controlling brancher, on A phase combined floodgate controlling brancher, string is provided with close a floodgate control switch, A phase latching relay SHJA, circuit breaker A phase of A phase and often opens auxiliary contact 3 and A phase anti-trip relay, A phase combined floodgate control switch is in parallel with the normally opened contact of A phase latching relay SHJA, and it is in parallel with the normally opened contact of A phase anti-trip relay that circuit breaker A phase often drives auxiliary contact 3; On B phase combined floodgate controlling brancher, string is provided with close a floodgate control switch, B phase latching relay SHJB, circuit breaker B phase of B phase and often opens auxiliary contact 3 and B phase anti-trip relay, B phase combined floodgate control switch is in parallel with the normally opened contact of B phase latching relay SHJB, and it is in parallel with the normally opened contact of B phase anti-trip relay that circuit breaker B phase often drives auxiliary contact 3; On C phase combined floodgate controlling brancher, string is provided with close a floodgate control switch, C phase latching relay SHJC, circuit breaker C phase of C phase and often opens auxiliary contact 3 and C phase anti-trip relay, C phase combined floodgate control switch is in parallel with the normally opened contact of C phase latching relay SHJC, and it is in parallel with the normally opened contact of C phase anti-trip relay that circuit breaker C phase often drives auxiliary contact 3.Namely A, B, C three-phase combined floodgate pulse command in backstage protection cabinet realizes self-sustaining respectively by the combined floodgate latching relay (i.e. latching relay SHJA, SHJB, SHJC) of three-phase.
As shown in Figure 2, on A phase closing coil branch road, also string is provided with normally closed auxiliary contact and the circuit breaker A phase normally closed auxiliary contact 2 of A phase anti-trip relay, on B phase closing coil branch road, also string to be provided with on the normally closed auxiliary contact of B phase anti-trip relay and circuit breaker B phase normally closed auxiliary contact 2, C phase closing coil branch road also string and to be provided with normally closed auxiliary contact and the circuit breaker C phase normally closed auxiliary contact 2 of C phase anti-trip relay.
Breaker closing control loop also comprises and is connected to circuit breaker shutting-brake control branch road on the spot, this circuit breaker on the spot on shutting-brake control branch road string be provided with circuit breaker shutting-brake control switch and circuit breaker shutting-brake control relay 52CX on the spot on the spot, on closing circuit, string establishes the normally opened contact of this circuit breaker shutting-brake control relay 52CX on the spot.
The releasing of this combined floodgate order is realized by the conversion of normally closed auxiliary contact in breaker mechanism under normal circumstances, if a phase wherein or two-phase primary equipment break down, auxiliary contact cannot complete conversion, this phase closing coil can be caused charged for a long time, and then burn.
When circuit breaker generation is single-phase or two-phase refuses to close, namely there is non-three phase fault, in auxiliary contact branch road in circuit breaker non-whole phase protection loop, one or two normally-closed contacts disconnect, simultaneously corresponding normally opened contact will close, this non-whole phase protection loop can be started, as shown in Figure 1, now non-three phase time relay 47T obtains electric, when circuit breaker non-three phase trouble duration reaches the setting time of time relay 47T, the control coil of non-three phase exit relay 47X obtains electric, normally closed contact in its closing circuit of circuit breaker is in fig. 2 opened, now can realize disconnecting the object of refusing the closing circuit closing phase.
When the phenomenon of unbalanced three-phase lines disappears, namely during non-three phase failure vanishes, non-three phase time relay 47T dead electricity, correspondingly, the control coil dead electricity of non-three phase exit relay 47X, its normally closed contact involution closes, this contact in closing circuit.
As can be seen here when circuit breaker generation is single-phase or two-phase refuses to close, when namely there is non-three phase fault, the phenomenon that protective device provided by the invention can effectively avoid closing coil charged for a long time occurs.
When divide-shut brake, all can divide-shut brake on the spot, also can remote operation, divide-shut brake is referred to and to be realized by the divide-shut brake control switch on on-site control panel on the spot, and remote operation is the order sent by the protection cabinet in master-control room.
In above-described embodiment; give the concrete structure of this closing coil protective device; but the present invention is not limited to above-mentioned execution mode; as other embodiment; due to the inventive point of the concrete annexation of anti-trip relay and the circuit breaker equal non-invention of shutting-brake control branch road on the spot, so above-mentioned two technical characteristics can not relate in protective device provided by the invention.
Be presented above concrete execution mode, but the present invention is not limited to described execution mode.Basic ideas of the present invention are above-mentioned basic scheme, and for those of ordinary skill in the art, according to instruction of the present invention, designing the model of various distortion, formula, parameter does not need to spend creative work.The change carried out execution mode without departing from the principles and spirit of the present invention, amendment, replacement and modification still fall within the scope of protection of the present invention.
Claims (5)
1. a closing coil protective device, it is characterized in that, comprise non-whole phase protection loop and closing circuit, on described non-whole phase protection loop, string is provided with control coil and the auxiliary contact branch road of the non-three phase time relay, and described auxiliary contact branch road comprises the normally closed auxiliary contact parallel branch and Chang Kai auxiliary contact parallel branch that are connected in series; Wherein, normally closed auxiliary contact parallel branch is made up of a circuit breaker A phase normally closed auxiliary contact, a circuit breaker B phase normally closed auxiliary contact and the parallel connection of a circuit breaker C phase normally closed auxiliary contact, often opens that auxiliary contact parallel branch often leaves auxiliary contact by a circuit breaker A phase, circuit breaker B phase often drives auxiliary contact and a circuit breaker C phase is often opened auxiliary contact parallel connection and formed; The control coil branch circuit parallel connection of the described non-three phase time relay and a non-three phase exit relay, on described non-three phase exit relay branch road, string is provided with a timing closing contact and the non-three phase exit relay control coil of the described non-three phase time relay; Described closing circuit is in series with a normally-closed contact of described non-three phase exit relay.
2. closing coil protective device according to claim 1, it is characterized in that, described closing coil protective device also comprises shutting-brake control loop, described shutting-brake control loop comprises A phase and to close a floodgate controlling brancher, B phase combined floodgate controlling brancher and C phase are closed a floodgate controlling brancher, on described A phase combined floodgate controlling brancher, string is provided with A phase and closes a floodgate control switch, A phase latching relay, another circuit breaker A phase often opens auxiliary contact and A phase anti-trip relay, described A phase combined floodgate control switch is in parallel with the normally opened contact of described A phase latching relay, it is in parallel with the normally opened contact of described A phase anti-trip relay that described another circuit breaker A phase often drives auxiliary contact, on described B phase combined floodgate controlling brancher, string is provided with close a floodgate control switch, B phase latching relay, another circuit breaker B phase of B phase and often opens auxiliary contact and B phase anti-trip relay, described B phase combined floodgate control switch is in parallel with the normally opened contact of described B phase latching relay, and it is in parallel with the normally opened contact of described B phase anti-trip relay that described another circuit breaker B phase often drives auxiliary contact, on described C phase combined floodgate controlling brancher, string is provided with close a floodgate control switch, C phase latching relay, another circuit breaker C phase of C phase and often opens auxiliary contact and C phase anti-trip relay, described C phase combined floodgate control switch is in parallel with the normally opened contact of described C phase latching relay, and it is in parallel with the normally opened contact of described C phase anti-trip relay that described another circuit breaker C phase often drives auxiliary contact.
3. closing coil protective device according to claim 2, it is characterized in that, described closing circuit is in series with by A phase closing coil branch road, the parallel branch that B phase closing coil branch road and C phase closing coil branch circuit parallel connection are formed, on described A phase closing coil branch road, string is provided with A phase closing coil, on B phase closing coil branch road, string is provided with B phase closing coil, on C phase closing coil branch road, string is provided with C phase closing coil, on described A phase closing coil branch road, also string is provided with the normally closed auxiliary contact of described A phase anti-trip relay, on B phase closing coil branch road, also string is provided with the normally closed auxiliary contact of described B phase anti-trip relay, on C phase closing coil branch road, also string is provided with the normally closed auxiliary contact of described C phase anti-trip relay.
4. closing coil protective device according to claim 3; it is characterized in that; on described A phase closing coil branch road, also string is provided with another circuit breaker A phase normally closed auxiliary contact; on B phase closing coil branch road, also string is provided with another circuit breaker B phase normally closed auxiliary contact, and on C phase closing coil branch road, also string is provided with another circuit breaker C phase normally closed auxiliary contact.
5. closing coil protective device according to claim 3; it is characterized in that; described closing coil protective device also comprises circuit breaker shutting-brake control branch road on the spot; this circuit breaker on the spot on shutting-brake control branch road string be provided with circuit breaker shutting-brake control switch and circuit breaker shutting-brake control relay on the spot on the spot, on described closing circuit, string is provided with the normally opened contact of described circuit breaker shutting-brake control relay on the spot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510807965.6A CN105406447A (en) | 2015-11-20 | 2015-11-20 | Closing coil protection apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510807965.6A CN105406447A (en) | 2015-11-20 | 2015-11-20 | Closing coil protection apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105406447A true CN105406447A (en) | 2016-03-16 |
Family
ID=55471772
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510807965.6A Pending CN105406447A (en) | 2015-11-20 | 2015-11-20 | Closing coil protection apparatus |
Country Status (1)
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|---|---|
| CN (1) | CN105406447A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107332352A (en) * | 2017-08-28 | 2017-11-07 | 广东电网有限责任公司潮州供电局 | A kind of determination methods and device for switching non-three phase separating brake |
| CN108346546A (en) * | 2017-12-29 | 2018-07-31 | 河南平高电气股份有限公司 | A kind of high-voltage circuitbreaker and its division brake control device |
| CN108695839A (en) * | 2018-07-03 | 2018-10-23 | 海华电子企业(中国)有限公司 | A kind of disconnecting switch divide-shut brake control device and method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201113248Y (en) * | 2007-09-24 | 2008-09-10 | 深圳市飞越电气设备有限公司 | Ring net cabinet control device |
| CN202586261U (en) * | 2012-03-27 | 2012-12-05 | 杭州华光电气有限公司 | Breaker tripping and closing protective device |
| CN103426695A (en) * | 2013-08-02 | 2013-12-04 | 北京工业大学 | Method and device for preventing circuit breaker coil from burning |
| CN103683176A (en) * | 2013-12-06 | 2014-03-26 | 国家电网公司 | Automatic reclosing lock device of intelligent circuit breaker |
| CN103928916A (en) * | 2014-04-11 | 2014-07-16 | 国家电网公司 | Three-phase inconsistency protection circuit of circuit breaker |
-
2015
- 2015-11-20 CN CN201510807965.6A patent/CN105406447A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201113248Y (en) * | 2007-09-24 | 2008-09-10 | 深圳市飞越电气设备有限公司 | Ring net cabinet control device |
| CN202586261U (en) * | 2012-03-27 | 2012-12-05 | 杭州华光电气有限公司 | Breaker tripping and closing protective device |
| CN103426695A (en) * | 2013-08-02 | 2013-12-04 | 北京工业大学 | Method and device for preventing circuit breaker coil from burning |
| CN103683176A (en) * | 2013-12-06 | 2014-03-26 | 国家电网公司 | Automatic reclosing lock device of intelligent circuit breaker |
| CN103928916A (en) * | 2014-04-11 | 2014-07-16 | 国家电网公司 | Three-phase inconsistency protection circuit of circuit breaker |
Non-Patent Citations (1)
| Title |
|---|
| 刘洪正: "《高压组合电器》", 31 March 2004, 中国电力出版社 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107332352A (en) * | 2017-08-28 | 2017-11-07 | 广东电网有限责任公司潮州供电局 | A kind of determination methods and device for switching non-three phase separating brake |
| CN107332352B (en) * | 2017-08-28 | 2019-10-29 | 广东电网有限责任公司潮州供电局 | A kind of judgment method and device switching non-three phase separating brake |
| CN108346546A (en) * | 2017-12-29 | 2018-07-31 | 河南平高电气股份有限公司 | A kind of high-voltage circuitbreaker and its division brake control device |
| CN108695839A (en) * | 2018-07-03 | 2018-10-23 | 海华电子企业(中国)有限公司 | A kind of disconnecting switch divide-shut brake control device and method |
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Application publication date: 20160316 |