CN203368011U - Circuit breaker trip coil automation protection device - Google Patents
Circuit breaker trip coil automation protection device Download PDFInfo
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- CN203368011U CN203368011U CN 201320239600 CN201320239600U CN203368011U CN 203368011 U CN203368011 U CN 203368011U CN 201320239600 CN201320239600 CN 201320239600 CN 201320239600 U CN201320239600 U CN 201320239600U CN 203368011 U CN203368011 U CN 203368011U
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- 238000012544 monitoring process Methods 0.000 claims abstract description 29
- 230000001681 protective effect Effects 0.000 claims description 23
- 230000002265 prevention Effects 0.000 abstract 1
- 239000004568 cement Substances 0.000 description 5
- 230000001012 protector Effects 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
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Abstract
The utility model discloses a circuit breaker trip coil automation protection device. The device comprises a closing protection loop, a tripping protection loop, a closing coil loop and a tripping prevention relay loop. The device of the utility model monitors a current of high-voltage circuit-breaker tripping and closing coil loops so as to realize protection to the coil when it is necessary. The two loops are combined and are monitored together so that reliability of the monitoring can be increased and cost can be reduced. All condition monitoring of high-voltage circuit breaker secondary loop is realized and a tripping and closing coil overburning problem caused by various reasons is radically solved. A certain popularization value and practical significance are possessed.
Description
Technical field
The utility model relates to a kind of circuit breaker tripping coil automatic safety device, belongs to the High-Voltage Electrical Appliances field.
Background technology
Breaker tripping and closing coil burnout accident often occurs in power system operation.During breaker tripping and closing coil design as everyone knows,, all by switching in short-term, design.Burning of breaker tripping and closing coil, be mainly can not normal cutoff due to the electric current of breaker tripping and closing wire loop, causes the long-time energising of breaker tripping and closing coil to cause.As the important electric component of electric power system, when electric power system fault, circuit breaker is accepted the breaker tripping and closing order of relaying protection and automatics, and requires to go to carry out the tripping operation action with the speed of Millisecond, to avoid accident to spread and to enlarge.Therefore, require circuit breaker in putting into operation, can be standby at any time, and can every order is executed without fail.While especially not allowing to have trip signal, the phenomenon of circuit breaker refusal tripping operation.Power department all will explicitly call for the closing circuit etc. of jump, closing loop, visual plant and the circuit breaker of each circuit breaker at DL400-91 relaying protection and automatic safety device technical regulation and NDGJ8-89 thermal power plant, electric substation's design of secondary wiring technical stipulation, monitoring arrangement that all should the installment monitor circuit complete.At present, domestic and international existing secondary loop of breaker integrity monitoring method has four kinds:
The one, adopt red (green) lamp loop of simple, intuitive directly to monitor;
The 2nd, adopt the indirect supervision of jumping (closing) gate position relay normally-closed contact tandem promoter central signal;
The 3rd, in the control box that part manufactory provides, be combined with the trip(ping) circuit integrity monitoring signal lamp under "on" position,
The 4th, in serial connection is high, ohm relay is in trip(ping) circuit.
The analysis discovery of above-mentioned four kinds of surveillance styles, first three kind mode exists a common problem to be: after breaker closing, the closing circuit integrality loses supervision, and after circuit breaker trip, the trip(ping) circuit integrality loses supervision, all belongs to non-full operating condition monitoring.The trip(ping) circuit of the 4th kind of mode belongs to full operating condition monitoring, and closing circuit still belongs to non-full operating condition monitoring.So can, under "on" position, close after tripping operation again and still belong to unknown, power supply reliability will lose assurance, not be still real full operating condition monitoring.These problems should draw attention, and take necessary measure to be improved.The more important thing is, above four kinds of modes do not possess the defencive function of breaker tripping and closing coil.
The utility model content
For addressing the above problem, the utility model discloses a kind of circuit breaker tripping coil automatic safety device.
In order to achieve the above object, the utility model provides following technical scheme: a kind of circuit breaker tripping coil automatic safety device, comprise closing protective loop, trip protection loop, closing coil loop and anti-trip relay loop, described closing protective loop mainly by opening button HA with mutually be connected in series in the positive and negative two ends of power supply with circuit breaker normally closed auxiliary contact QF, Hall element HL1, closing contactor coil KM and time relay normally-closed contact KH1 after the passive bus K1 of protective relaying device is in parallel and form; After described closing coil loop is in parallel with resistance R 6 by closing contactor normally opened contact KM and fuse, Hall element HL3 and closing coil YC form and be connected in series in both ends of power and form; Described trip protection loop by opening button TA with often open auxiliary contact QF, Hall element HL2, breaking coil YT and normally-closed contact KH1 with circuit breaker after the passive bus K1 of protective relaying device is in parallel and mutually be connected in series in both ends of power and form.Described anti-trip relay loop comprises the normally closed auxiliary contact KCF of anti-trip relay coil KCF and anti-trip relay; the passive bus K1 that described anti-trip relay coil KCF mono-end is often opened auxiliary contact QF and protective relaying device through circuit breaker is connected to power positive end, and the other end is connected to the negative terminal of power supply.
As a kind of improvement of the present utility model; described circuit breaker tripping coil automatic safety device also comprises a combined floodgate monitoring loop; described combined floodgate monitoring loop by resistance R 3 with form after circuit breaker normally closed auxiliary contact QF connects; resistance R 3 one terminates at power positive end, and circuit breaker normally closed auxiliary contact QF mono-is terminated between the circuit breaker normally closed auxiliary contact QF and Hall element HL1 in closing protective loop.
As a kind of improvement of the present utility model; described circuit breaker tripping coil automatic safety device also comprises a tripping operation monitoring loop; described tripping operation monitoring loop is often opened after auxiliary contact QF connects and is formed by resistance R 5 and circuit breaker; resistance R 5 one terminates at power positive end, and circuit breaker is often opened the circuit breaker that auxiliary contact QF mono-is terminated at the trip protection loop and often opened between auxiliary contact QF and Hall element HL2.
As a kind of improvement of the present utility model, also at least be provided with a resistance R 7 in described closing coil loop, described resistance R 7 with go here and there in described closing coil loop after closing contactor normally opened contact KM is in parallel.
The beneficial effects of the utility model are:
The utility model is by can the electric current of primary cut-out breaker tripping and closing wire loop being monitored, to realize in case of necessity the protection to coil.Both prevented that circuit breaker was incorporated on fault because the expansion fault that the circuit breaker misaction causes appears in the trip(ping) circuit broken string, even caused system break-down, and also improved power supply reliability and really realize the full operating condition monitoring of secondary loop of breaker.And monitor by the two being combined in the lump, so both can improve the reliability of supervision, can reduce costs again.Not only realized the full monitoring of working condition of primary cut-out secondary circuit, also fundamentally solved the tripping coil caused for various reasons and burnt problem.There is certain promotional value and realistic meaning.
The accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
Technical scheme the utility model provided below with reference to specific embodiment is elaborated, and should understand following embodiment and only for the utility model is described, be not used in restriction scope of the present utility model.
Embodiment 1:
A kind of circuit breaker tripping coil automatic safety device as described in Figure 1, comprise closing protective loop, trip protection loop and closing coil loop.Described closing protective loop mainly by opening button HA with mutually be connected in series in the positive and negative two ends of power supply with circuit breaker normally closed auxiliary contact QF, Hall element HL1, closing contactor coil KM and time relay normally-closed contact KH1 after the passive bus K1 of protective relaying device is in parallel and form, in figure+KM ,-KM is for controlling power supply.Wherein opening button HA is the manual operation button, and the passive bus K1 of protective relaying device is remote automatic control switch.
After described closing coil loop is in parallel with resistance R 6 by closing contactor normally opened contact KM and fuse, Hall element HL3 and closing coil YC form and be connected in series in both ends of power and form.
Can not reset and cause switch knob HA always in conducting state because of button after switch knob HA presses, if there is no anti-trip relay, the phenomenon that just there will be circuit breaker to close a floodgate at once after circuit breaker has carried out separating brake, this is definitely unallowed in the High-Voltage Electrical Appliances safety standard, so add anti-trip relay, when switch knob HA conducting always, after the breaker closing success, QF will be in conducting state, like this KCF relay coil obtain electric after its auxiliary node KCF will disconnect, so just cut off the closing coil loop, just not there will be the phenomenon of closing a floodgate at once after breaker open operation.
Described trip protection loop by opening button TA with often open auxiliary contact QF, Hall element HL2, breaking coil YT and time relay normally-closed contact KH1 with circuit breaker after the passive bus K1 of protective relaying device is in parallel and mutually be connected in series in both ends of power and form.Wherein opening button TA is the manual operation button, and the passive bus K1 of protective relaying device is remote automatic control switch.
Primary cut-out secondary circuit protector function can be realized in closing protective loop, trip protection loop; no matter be at manual operation switch knob HA or in control K1 connection automatically; when the closing protective loop has electric current to flow through, Hall element HL1 will measure the size of this electric current.If electric current is greater than a certain limit value, secondary circuit protector will start timing unit and start timing.If circuit breaker normally closed auxiliary contact QF switching is undesired or operating mechanism is stuck; in the time of adjusting at timing unit, the feed motion electric current does not disappear; secondary circuit protector will send trip signal opens its output normally-closed contact KH1; tripping closing contactor KM; normally opened contact tripping closing coil loop by KM; protective circuit breaker closing coil YC avoids burning, and sends corresponding sound and light alarm signal simultaneously, notifies the operator on duty.
In like manner; when the trip protection loop has operating current to flow through, within the time of adjusting, the tripping operation operating current does not disappear, and secondary circuit protector will be given an order its output normally-closed contact KH2 is opened; tripping trip protection loop, and provide corresponding sound and light alarm signal.
Embodiment 2:
As a kind of of embodiment 1, effectively supplement; described circuit breaker tripping coil automatic safety device also comprises a combined floodgate monitoring loop; described combined floodgate monitoring loop by resistance R 3 with form after circuit breaker normally closed auxiliary contact QF connects; resistance R 3 one terminates at power positive end, and circuit breaker normally closed auxiliary contact QF mono-is terminated between the circuit breaker normally closed auxiliary contact QF and Hall element HL1 in closing protective loop.
Described circuit breaker tripping coil automatic safety device also comprises a tripping operation monitoring loop; described tripping operation monitoring loop by resistance R 5 with form after auxiliary contacts of circuit breaker QF connects; resistance R 5 one terminates at power positive end, and auxiliary contacts of circuit breaker QF mono-is terminated between the auxiliary contacts of circuit breaker QF and Hall element HL2 in trip protection loop.
Combined floodgate monitoring loop and tripping operation monitoring loop can be realized full operating condition monitoring function, by accompanying drawing, can be found out, additional resistance R3 is through circuit breaker normally closed auxiliary contact access closing protective loop; Additional resistance R5 often opens auxiliary contact access trip(ping) circuit through circuit breaker.The integrity monitoring that resistance R 3, R5 are breaker coil provides current path, the selection of this resistance otherwise the correct operation and the thermal stability that affect coil are prerequisite.The auxiliary contacts of circuit breaker of resistance R 3, R5 branch road to be introduced and in order realizing, auxiliary contacts of circuit breaker to be monitored.Differentiated the integrality in loop by operating current in breaker tripping and closing moments; The standby current flow through by R3, R5 branch road after breaker tripping and closing is differentiated the integrality in loop; In the breaker tripping and closing process, often have open, the instantaneous all contact phenomenas not in normally closed two contacts, can introduce circuit-breaker status information or differentiate to prevent wrong report with software.
Embodiment 3:
As a kind of of embodiment 1 and embodiment 2, effectively supplement, also at least be provided with a resistance R 7 in described closing coil loop, described resistance R 7 with go here and there in described closing coil loop after closing contactor normally opened contact KM is in parallel, because cement resistor R6 heat radiation is bad, just with a R6, easily cause the heating of cement resistor, even may set off an explosion, by R7 or more cement resistor are set, share the resistance of each cement resistor, the heat that has prevented cement resistor is excessive, and the generation set off an explosion, security performance is good.
The utility model is by can the electric current of primary cut-out breaker tripping and closing wire loop being monitored, to realize in case of necessity the protection to coil.Both prevented that circuit breaker was incorporated on fault because the expansion fault that the circuit breaker misaction causes appears in the trip(ping) circuit broken string, even caused system break-down, and also improved power supply reliability and really realize the full operating condition monitoring of secondary loop of breaker.And monitor by the two being combined in the lump, so both can improve the reliability of supervision, can reduce costs again.Not only realized the full monitoring of working condition of primary cut-out secondary circuit, also fundamentally solved the tripping coil caused for various reasons and burnt problem.There is certain promotional value and realistic meaning.
The disclosed technological means of the utility model scheme is not limited only to the disclosed technological means of above-mentioned execution mode, also comprises the technical scheme be comprised of above technical characterictic combination in any.
Claims (4)
1. a circuit breaker tripping coil automatic safety device, it is characterized in that: comprise closing protective loop, trip protection loop, closing coil loop and anti-trip relay loop, described closing protective loop mainly by opening button HA with mutually be connected in series in the positive and negative two ends of power supply with circuit breaker normally closed auxiliary contact QF, Hall element HL1, closing contactor coil KM and time relay normally-closed contact KH1 after the passive bus K1 of protective relaying device is in parallel and form; After described closing coil loop is in parallel with resistance R 6 by closing contactor normally opened contact KM and fuse, Hall element HL3 and closing coil YC be connected in series in both ends of power and form; Described trip protection loop by opening button TA with often open auxiliary contact QF, Hall element HL2, breaking coil YT and normally-closed contact KH1 with circuit breaker after the passive bus K1 of protective relaying device is in parallel and mutually be connected in series in both ends of power and form; Described anti-trip relay loop comprises the normally closed auxiliary contact KCF of anti-trip relay coil KCF and anti-trip relay; the passive bus K1 that described anti-trip relay coil KCF mono-end is often opened auxiliary contact QF and protective relaying device through circuit breaker is connected to power positive end, and the other end is connected to the negative terminal of power supply.
2. a kind of circuit breaker tripping coil automatic safety device according to claim 1; it is characterized in that: described circuit breaker tripping coil automatic safety device also comprises a combined floodgate monitoring loop; described combined floodgate monitoring loop by resistance R 3 with form after circuit breaker normally closed auxiliary contact QF connects; resistance R 3 one terminates at power positive end, and circuit breaker normally closed auxiliary contact QF mono-is terminated between the circuit breaker normally closed auxiliary contact QF and Hall element HL1 in closing protective loop.
3. a kind of circuit breaker tripping coil automatic safety device according to claim 1; it is characterized in that: described circuit breaker tripping coil automatic safety device also comprises a tripping operation monitoring loop; described tripping operation monitoring loop is often opened after auxiliary contact QF connects and is formed by resistance R 5 and circuit breaker; resistance R 5 one terminates at power positive end, and circuit breaker is often opened the circuit breaker that auxiliary contact QF mono-is terminated at the trip protection loop and often opened between auxiliary contact QF and Hall element HL2.
4. a kind of circuit breaker tripping coil automatic safety device according to claim 1; it is characterized in that: also at least be provided with a resistance R 7 in described closing coil loop, described resistance R 7 with go here and there in described closing coil loop after closing contactor normally opened contact KM is in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320239600 CN203368011U (en) | 2013-05-07 | 2013-05-07 | Circuit breaker trip coil automation protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320239600 CN203368011U (en) | 2013-05-07 | 2013-05-07 | Circuit breaker trip coil automation protection device |
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| CN203368011U true CN203368011U (en) | 2013-12-25 |
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| CN 201320239600 Expired - Fee Related CN203368011U (en) | 2013-05-07 | 2013-05-07 | Circuit breaker trip coil automation protection device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104808102A (en) * | 2015-04-29 | 2015-07-29 | 中国电力科学研究院 | A method for on-line monitoring and early warning of relay protection DC operating circuit |
| CN105375450A (en) * | 2015-11-19 | 2016-03-02 | 内蒙古电力勘测设计院有限责任公司 | Secondary circuit of fixed cabinet |
| CN106814313A (en) * | 2017-01-13 | 2017-06-09 | 天津大学 | The intellectual faculties in breaker operator loop |
-
2013
- 2013-05-07 CN CN 201320239600 patent/CN203368011U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104808102A (en) * | 2015-04-29 | 2015-07-29 | 中国电力科学研究院 | A method for on-line monitoring and early warning of relay protection DC operating circuit |
| CN104808102B (en) * | 2015-04-29 | 2017-11-03 | 中国电力科学研究院 | A method for on-line monitoring and early warning of relay protection DC operating circuit |
| CN105375450A (en) * | 2015-11-19 | 2016-03-02 | 内蒙古电力勘测设计院有限责任公司 | Secondary circuit of fixed cabinet |
| CN105375450B (en) * | 2015-11-19 | 2018-07-17 | 内蒙古电力勘测设计院有限责任公司 | A kind of fixed cabinet secondary circuit |
| CN106814313A (en) * | 2017-01-13 | 2017-06-09 | 天津大学 | The intellectual faculties in breaker operator loop |
| CN106814313B (en) * | 2017-01-13 | 2019-05-17 | 天津大学 | The intellectual faculties in breaker operator circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131225 Termination date: 20150507 |
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| EXPY | Termination of patent right or utility model |