CN102709104A - Controllable tank heater of SF6 circuit breaker - Google Patents
Controllable tank heater of SF6 circuit breaker Download PDFInfo
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- CN102709104A CN102709104A CN2012101933420A CN201210193342A CN102709104A CN 102709104 A CN102709104 A CN 102709104A CN 2012101933420 A CN2012101933420 A CN 2012101933420A CN 201210193342 A CN201210193342 A CN 201210193342A CN 102709104 A CN102709104 A CN 102709104A
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- heater
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Abstract
The invention relates to power equipment, in particular to a controllable tank heater of a SF6 circuit breaker. The controllable tank heater comprises a temperature controller KT and a heating loop CB, wherein the heating loop CB is provided with a contactor KTX. The controllable tank heater is characterized in that the heating loop CB is provided with a signal transmission wire core which is communicated with a signal loop of a master control room monitor. The controllable tank heater has the beneficial effects of monitoring the starting situation of equipment remotely, timely finding out and removing faults, eliminating defects of unavailability for state display, incapability of timely finding a fault, inconvenience for removing the fault and the like of the traditional equipment, and providing guarantees to the normal operation of SF6 circuit breaker and relevant facilities.
Description
Technical field
The present invention relates to a kind of power equipment, the controlled tank body heater of promptly a kind of sulfur hexafluoride breaker.
Background technology
Sulfur hexafluoride breaker often is abbreviated as SF
6Circuit breaker is one of common equipment in the high-tension circuit.SF
6Its main body of circuit breaker is a splendid attire SF
6The tank body of gas.SF
6Gas is a kind of arc extinguishing and dielectric of excellent performance, and it is good that the circuit breaker of filling with sulphur hexafluoride has an arc extinction performance, and connecting-disconnecting function is strong; Fracture voltage is suitable for doing higherly, allows continuous open and close times more, is applicable to frequent operation; Noise is little, no fire hazard, advantage such as dynamo-electric wearing and tearing are little., SF
6Gas will liquefy below-30 ℃, loses the arc extinguishing function.Therefore,, all be provided with heater on the tank body of circuit breaker, start heating when the thermostat of heater is set in-30 ℃, withdraw from heating when being higher than-25 ℃ at northern frore area.Although taked above-mentioned measure, still there are many problems in existing heater, wherein anxious following 3 points that have to be solved.The one, the equipment work process does not have tangible shows signal, and whether people can't observe heater and start; The 2nd, when heater broke down, people can not find timely; The 3rd, the control temperature of thermostat is predefined, because a variety of causes possibly exist the not accurate enough problem of set point, under the intact situation of equipment miscellaneous part, it is undesired that work occurs, how by desired temperature inaccurate due to.Because operating state is opaque, the desired temperature error is difficult for finding, even found and can not solve at short notice that equipment will lose the effect of arc extinguishing.For all the foregoing reasons, SF
6Circuit breaker tank body heater becomes one of hidden danger of line security because operating state is difficult to control.
Summary of the invention
The purpose of this invention is to provide a kind of ability display working condition, and be suitable for remote monitor, can guarantee the circuit breaker tank body heater of the normal operation of equipment.
Above-mentioned purpose is realized by following technical scheme: develop a kind of SF
6The controlled tank body heater of circuit breaker; Comprise thermostat KT and heating circuit CB; Heating circuit CB is provided with contactor KTX, is characterized in: said heating circuit CB is provided with the signal transmssion line core, and the signal circuit of signal transmssion line core and master-control room watch-dog interrelates.
Said signal transmssion line core one end links to each other with the normally opened contact of the contactor KTX of heating circuit CB, and the heater starting signal circuit of the other end and main control room watch-dog interrelates.
The three-phase heating circuit CB1 of said tank body heater, CB2, CB3 connect by the star-star connection mode; And be connected in series a current relay ZL on the property line therein; ZL sets the operating current value greater than flow through when normally the moving unsymmetrical current of the neutral line of three-phase heating circuit CB1, CB2, CB3; The normal opened contact of current relay ZL links to each other with the signal transmssion line core, and the heater failure signal circuit of signal transmssion line core and main control room watch-dog interrelates.During work, when the heater operate as normal, current relay ZL is failure to actuate; When heater any broke down mutually, the unsymmetrical current of the neutral line increased, current relay ZL action, and its normal opened contact is closed, and subsequent use core transfers to this signal the watch-dog of main control room.
Be parallel with manual conversion handle ZH on the contact of said temperature controller KT.
The normally opened contact of the contactor KTX of said heating circuit CB links to each other with the signal transmssion line core, and the heater starting signal circuit of the other end of signal transmssion line core and main control room watch-dog interrelates; The three-phase heating circuit CB1 of tank body heater, CB2, CB3 connect by the star-star connection mode; And be connected in series a current relay ZL on the property line therein; ZL sets the operating current value greater than flow through when normally the moving unsymmetrical current of the neutral line of three-phase heating circuit CB1, CB2, CB3; The normal opened contact of current relay ZL links to each other with the signal transmssion line core, and the heater failure signal circuit of signal transmssion line core and main control room watch-dog interrelates; Be parallel with manual conversion handle ZH on the contact of temperature controller KT.
The invention has the beneficial effects as follows: but the startup situation of remote monitor equipment and can in time find and fix a breakdown, eliminated the existing equipment starting state and do not had demonstration, can not in time find fault, inconvenience drawback such as fix a breakdown, be SF
6The normal operation of circuit breaker and related facility provides assurance.
Description of drawings
Fig. 1 is the circuit diagram of existing equipment;
Fig. 2 is the circuit diagram of first kind of embodiment;
Fig. 3 is the circuit diagram of second kind of embodiment;
Fig. 4 is the circuit diagram of the third embodiment;
Fig. 5 is the circuit diagram of the 4th kind of embodiment.
Visible among the figure: heating circuit CB, contactor KTX, thermostat KT, current relay ZL, conversion handle ZH, signal transmssion line core-----.
Embodiment
The total design of the present invention is that the actuating signal with heater is sent on the supervisory control system of main control room, and the operations staff can directly keep watch on and in time intervene the operation of heater.Execution mode around this design is a lot, and four kinds of embodiment below only give an example:
First kind of embodiment:, introduced existing SF through Fig. 1 earlier for the ease of explanation
6Circuit breaker tank body heater; Comprise heating circuit CB and contactor KTX; Heating circuit CB is three-phase heating circuit CB1, CB2, CB3, and each loop is equipped with terminal block SH4, also is respectively equipped with contactor KTX1, KTX2, KTX3; Each contactor all has a pair of normally opened contact, and each normally opened contact is folding under the control of contactor actuation coil KTX4 all.In addition, also be provided with thermostat KT, start when thermostat KT is set in temperature to-30 ℃, withdraw from the time of more than-25 ℃.Obviously, this SF
6The operating state of circuit breaker tank body heater does not have tangible shows signal, and when temperature arrived below-30 ℃, people did not know whether heater starts yet; When temperature arrived more than-25 ℃, people did not know whether heater stops yet, when heater breaks down; People can not find timely; When the thermostat set point is not accurate enough, can not in time find, can not under the situation that does not influence operation, adjust even found.
This example is to existing SF
6The uncontrollable problem of circuit breaker tank body heater starting state is improved.As shown in Figure 2: that master-control room is set; In the master-control room the inside monitor is installed; Monitor is provided with the heater starting signal circuit, on each normally opened contact of three contactor KTX1 of the three-phase heating circuit CB1 of tank body heater, CB2, CB3, KTX2, KTX3, connects supported signal transmission core; The signal transmssion line core dots among the figure, the heater starting signal circuit of another termination master-control room monitor of signal transmssion line core.When the heating circuit startup, when promptly each normally opened contact of contactor KTX1, KTX2, KTX3 was closed, the signal transmssion line core was transferred to enabling signal on the screen of main control room watch-dog, and operating personnel know that promptly heater starts.If ambient temperature is lower than-30 ℃, heater is not activated, or is higher than-25 ℃ of heaters and does not withdraw from, and has occurred fault exactly, can take measures.
Second kind of embodiment: as shown in Figure 3, in the heater control loop, install an element additional, be used to keep watch on heater and whether break down.Specific practice is: three-phase heating circuit CB1, CB2, the CB3 of three-phase breaker tank body heater are connected by the star-star connection mode; And be connected in series a current relay ZL on the property line therein; The electric current of current relay ZL of flowing through is the unsymmetrical current of three-phase heating circuit, and flow through when normally moving greater than the three-phase heater unsymmetrical current of the neutral line of the operating value of ZL is set.When the three-phase heater operate as normal, unsymmetrical current is very little, and current value is zero under the ideal situation, and less than the current setting value of this current relay ZL, current relay ZL is failure to actuate.When any one of three-phase heater breaks down, damages or when the three phase mains phase shortage takes place; Unsymmetrical current through the neutral line will increase, much larger than the operating current of its setting, and current relay ZL action; Its normal opened contact is closed; On the normal opened contact of current relay, be connected to the signal transmssion line core, the signal transmssion line core dots among the figure, this signal is transferred in the watch-dog of main control room through the signal transmssion line core; The heater failure signal circuit of watch-dog sends alarm signal immediately; The operations staff of watch-dog just can in time monitor heating system and abnormal conditions occur, and indication the attendant overhaul, and improved the heating system reliability of operation greatly.
The third embodiment: as shown in Figure 4, parallel connection one " manual " conversion handle ZH on the contact of temperature controller KT.Accurate when the start-up temperature design of temperature controller, in the time of can normally starting heating according to ambient temperature, can this handle be beaten to " automatically " position, the contact 1-2 of ZH connects, and heating system is controlled by temperature controller; If find that start-up temperature that temperature controller KT sets is inaccurate and can't adjust at short notice or change; And outside air temperature is when having dropped to start-up temperature; Can carry out craft and start by force, this handle is beaten to " manually " position, the contact 3-4 of ZH connects; This moment, the tank body heater was not controlled by the contact of temperature controller KT, directly started the SF in the tank body
6Gas heats, and guarantees that heater can reliably drop into.
The 4th kind of embodiment: as shown in Figure 5, master-control room is set, in the master-control room the inside monitor is installed, monitor is provided with heater starting signal circuit and fault-signal loop.On each normally opened contact of three contactor KTX1 of the three-phase heating circuit CB1 of tank body heater, CB2, CB3, KTX2, KTX3, connect supported signal transmission core, the heater starting signal circuit of another termination master-control room monitor of signal transmssion line core.Simultaneously; The tank body heater of three-phase breaker is connected by the star-star connection mode; And be connected in series a current relay ZL on the property line therein; The electric current of current relay ZL of flowing through is the unsymmetrical current of three-phase heating circuit, and flow through when normally moving greater than the three-phase heater unsymmetrical current of the neutral line of the operating value of ZL is set, and on the normal opened contact of current relay ZL, is connected to the signal transmssion line core.In addition, parallel connection one " manual " conversion handle ZH on the contact of temperature controller KT.
When the heating circuit startup, when promptly each normally opened contact of contactor KTX1, KTX2, KTX3 was closed, the signal transmssion line core was transferred to enabling signal on the screen of main control room watch-dog, and operating personnel know that promptly heater starts.If ambient temperature is lower than-30 ℃, heater is not activated, or is higher than-25 ℃ of heaters and does not withdraw from, and just can take measures.
When the three-phase heater operate as normal, unsymmetrical current is very little, and current value is zero under the ideal situation, and less than the current setting value of this current relay ZL, current relay ZL is failure to actuate; When any one of three-phase heater breaks down, damages or when the three phase mains phase shortage takes place; Unsymmetrical current through the neutral line all can be very big, much larger than the operating current of its setting, and current relay ZL action; Its normal opened contact is closed; This signal is transferred in the watch-dog of main control room through fault-signal transmission core, the heater failure signal circuit of watch-dog sends alarm signal immediately, and the operations staff of watch-dog just can in time monitor heating system and abnormal conditions occur; Indication the attendant overhaul, and improved the heating system reliability of operation greatly.
The signal transmssion line core dots among the figure.
Accurate when the start-up temperature design of temperature controller, in the time of can normally starting heating system according to ambient temperature, can this handle be beaten to " automatically " position, the contact 1-2 of ZH connects, and heating system is controlled by thermostat KT; If find that start-up temperature that thermostat KT sets is inaccurate and can't adjust at short notice or change; And outside air temperature is when having dropped to start-up temperature; Can manually start by force, when beating this handle to " manually " position, the contact 3-4 of ZH connects; This moment, heater was not controlled by the contact of thermostat KT, directly started the SF in the tank body
6Gas heats, and guarantees that heater can reliably drop into.
Obviously, present embodiment has been concentrated three characteristics of first three embodiment, can grasp the startup situation of heating circuit, can in time find fault again, can also under the inaccurate situation of thermostat set point, start by force through manual.
Claims (5)
1. controlled tank body heater of sulfur hexafluoride breaker; Comprise thermostat KT and heating circuit CB; Heating circuit CB is provided with contactor KTX, is characterized in: said heating circuit CB is provided with the signal transmssion line core, and the signal circuit of signal transmssion line core and master-control room watch-dog interrelates.
2. the controlled tank body heater of sulfur hexafluoride breaker according to claim 1; It is characterized in that: said signal transmssion line core one end links to each other with the normally opened contact of the contactor KTX of heating circuit CB, and the heater starting signal circuit of the other end and main control room watch-dog interrelates.
3. the controlled tank body heater of sulfur hexafluoride breaker according to claim 1; It is characterized in that: the three-phase heating circuit CB1 of the heating circuit CB of said tank body heater, CB2, CB3 connect by the star-star connection mode; And be connected in series a current relay ZL on the property line therein; ZL sets the operating current value greater than flow through when normally the moving unsymmetrical current of the neutral line of three-phase heating circuit CB1, CB2, CB3; The normal opened contact of current relay ZL links to each other with the signal transmssion line core, and the heater failure signal circuit of signal transmssion line core and main control room watch-dog interrelates.
4. the controlled tank body heater of sulfur hexafluoride breaker according to claim 1 is characterized in that: be parallel with manual conversion handle ZH on the contact of said temperature controller KT.
5. the controlled tank body heater of sulfur hexafluoride breaker according to claim 1; It is characterized in that: the normally opened contact of the contactor KTX of said heating circuit CB links to each other with the signal transmssion line core, and the heater starting signal circuit of the other end of signal transmssion line core and main control room watch-dog interrelates; The three-phase heating circuit CB1 of tank body heater heats loop CB, CB2, CB3 connect by the star-star connection mode; And be connected in series a current relay ZL on the property line therein; ZL sets the operating current value greater than flow through when normally the moving unsymmetrical current of the neutral line of three-phase heating circuit CB1, CB2, CB3; The normal opened contact of current relay ZL links to each other with the signal transmssion line core, and the heater failure signal circuit of signal transmssion line core and main control room watch-dog interrelates; Be parallel with manual conversion handle ZH on the contact of temperature controller KT.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101933420A CN102709104A (en) | 2012-06-13 | 2012-06-13 | Controllable tank heater of SF6 circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101933420A CN102709104A (en) | 2012-06-13 | 2012-06-13 | Controllable tank heater of SF6 circuit breaker |
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| Publication Number | Publication Date |
|---|---|
| CN102709104A true CN102709104A (en) | 2012-10-03 |
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ID=46901784
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101933420A Pending CN102709104A (en) | 2012-06-13 | 2012-06-13 | Controllable tank heater of SF6 circuit breaker |
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| Country | Link |
|---|---|
| CN (1) | CN102709104A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201166563Y (en) * | 2008-02-15 | 2008-12-17 | 陕西电力科学研究院 | Apparatus for on-line monitoring SF6 gas status of high tension SF6 electrical equipment |
| EP1657731B1 (en) * | 2004-11-16 | 2009-08-26 | Abb Research Ltd. | High voltage circuit breaker with cooling |
| CN201796803U (en) * | 2010-06-12 | 2011-04-13 | 河南平高东芝高压开关有限公司 | Automatic insulating device of tank type high-voltage circuit breaker |
| CN202633149U (en) * | 2012-06-13 | 2012-12-26 | 内蒙古东部电力有限公司通辽电业局 | Controllable tank body heating device for sulfur hexafluoride breaker |
-
2012
- 2012-06-13 CN CN2012101933420A patent/CN102709104A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1657731B1 (en) * | 2004-11-16 | 2009-08-26 | Abb Research Ltd. | High voltage circuit breaker with cooling |
| CN201166563Y (en) * | 2008-02-15 | 2008-12-17 | 陕西电力科学研究院 | Apparatus for on-line monitoring SF6 gas status of high tension SF6 electrical equipment |
| CN201796803U (en) * | 2010-06-12 | 2011-04-13 | 河南平高东芝高压开关有限公司 | Automatic insulating device of tank type high-voltage circuit breaker |
| CN202633149U (en) * | 2012-06-13 | 2012-12-26 | 内蒙古东部电力有限公司通辽电业局 | Controllable tank body heating device for sulfur hexafluoride breaker |
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Application publication date: 20121003 |