CN204706818U - A kind of high-tension switch cabinet switching-off device - Google Patents

A kind of high-tension switch cabinet switching-off device Download PDF

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Publication number
CN204706818U
CN204706818U CN201520422821.4U CN201520422821U CN204706818U CN 204706818 U CN204706818 U CN 204706818U CN 201520422821 U CN201520422821 U CN 201520422821U CN 204706818 U CN204706818 U CN 204706818U
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China
Prior art keywords
resistance
auxiliary relay
separating brake
protective device
switch
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CN201520422821.4U
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Chinese (zh)
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傅律
宋壁文
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State Grid Corp of China SGCC
Hefei Power Supply Co of State Grid Anhui Electric Power Co Ltd
Training Center of State Grid Anhui Electric Power Co Ltd
Anhui Electrical Engineering Professional Technique College
Original Assignee
State Grid Corp of China SGCC
Hefei Power Supply Co of State Grid Anhui Electric Power Co Ltd
Training Center of State Grid Anhui Electric Power Co Ltd
Anhui Electrical Engineering Professional Technique College
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Abstract

The utility model relates to a kind of high-tension switch cabinet switching-off device, belong to high-tension switch cabinet field, comprise operating power and switching winding, described high-tension switch cabinet switching-off device is provided with separating brake protective device and acoustic-optic alarm, and separating brake protective device is provided with diode, the first electrolytic capacitor, the first resistance, the second resistance and auxiliary relay; Acoustic-optic alarm is provided with independent current source, switch, the second auxiliary relay normally closed contact, the 3rd resistance, warning lamp and alarm.When circuit system be short-circuited, the fault such as power-off time, ensure that switching winding continues to provide sub-gate signal by separating brake protective device; Acoustic-optic alarm and alarm, when separating brake protective device breaks down, carry out separating brake by isolating switch protective device, misoperation can not occur simultaneously; Being provided with maintenance control switch in isolating switch protective device, by maintenance control switch disconnecting switch operation, avoiding, when overhauling, misoperation occurs.

Description

A kind of high-tension switch cabinet switching-off device
Technical field
The utility model relates to a kind of switching-off device, particularly relates to a kind of high-tension switch cabinet switching-off device.
Background technology
High-tension switch cabinet is also referred to as high voltage power distributing cabinet.High-tension switch cabinet refers to for electric power system generating, transmission of electricity, distribution, electric energy conversion and plays the effects such as break-make, control or protection in consuming.High-tension switch cabinet should meet the relevant requirements of " ac metal closing switch gear standard ", is made up of cabinet and circuit breaker two major part, and cabinet is made up of housing, electric elements (comprising insulating part), various mechanism, secondary terminals and line etc.
In recent years, along with development that is industrial and electric power, middle-high voltage switch capacity increases day by day, also more and more higher to the service requirement of high-tension switch cabinet.The reliability of power supply is one of important indicator weighing the quality of power supply, and high voltage power distributing cabinet, once break down, can cause the accidents such as large-area power-cuts usually.For the equipment in protection high-tension switch cabinet normally runs; equipment in high-tension switch cabinet controls startup and the stopping of this equipment by switching-off device; wherein switching-off device also comprises the isolating switch connecting this equipment; isolating switch controls total current in this equipment and surrounding devices circuit, normally runs in order to protective circuit.But from practical application; high-tension switch cabinet itself objectively comes with some shortcomings; as in some large enterprises; for ensureing that high-tension switch cabinet protector can when breaking down in high-tension switch cabinet inside; can continue to protect high-tension switch cabinet, generally carry out normal running, fault relaying protection with batteries or stand-by power supply.Medium-sized enterprise or several high-voltage boards distribution, to control; because cost reason all cannot arrange floating cell room or double-throw power supply for subsequent use, but directly use low-tension supply (or after rectification) in this high-pressure system as AC and DC operation, relay protecting power.Like this, when high-pressure system fault or after losing low-tension supply, high-tension switch cabinet just cannot operate, and relaying protection can not action separating brake, must manually beat jumping brake separating mechanism, leave the hidden danger leading to serious accident involving serious consequences by operations staff.And in high-tension switch cabinet practical operation, due to high-tension switch cabinet complex structure, easily there is misoperation in accident diversity.Such as when the high-voltage synchronous motor runtime system in high-tension switch cabinet has a power failure suddenly, unfamiliar operations staff does not easily take manually to beat to jump brake separating mechanism, on the contrary whole operating system to be operated a switch power-off, after System recover power transmission, motor voluntarily asynchronous starting runs, and manual operation and relaying protection cannot be carried out because losing operating power; The long-time overload operation of motor, after motor Yin Gaore will be caused to burn, serious even catching fire, causes accident to expand further.
When high-tension switch cabinet can not carry out manual control circuit separating brake and relaying protection automatic control circuit separating brake; separating brake is carried out by disconnecting switch operation; isolating switch is by reaching separating brake object in the electric current in the circuit breaker in cutoff high switch cubicle; because electric current in circuit breaker is cut off; in high-tension switch cabinet, other equipment also quit work; not only troublesome poeration, and impact in emergency circumstances stops power transmission operation.And the first step of inspection operation program during breaker open operation, if breaker open operation makes a mistake, its follow-up operation is all useless to maintenance task, appoints for misoperation, will cause mistakenly stop electricity and incur loss through delay maintenance task; Circuit breaker false switching likely causes even more serious consequence.Ensure that maintenance task carries out safely the important measures with power network safe operation smoothly when missing separating brake, false switching for preventing circuit breaker.
Utility model content
The deficiency that the utility model exists for prior art, provide a kind of high-tension switch cabinet switching-off device, concrete technical scheme is as follows:
A kind of high-tension switch cabinet switching-off device, comprise operating power and switching winding, described high-tension switch cabinet switching-off device is provided with separating brake protective device and acoustic-optic alarm, separating brake protective device is provided with diode, first electrolytic capacitor, first resistance, second resistance and auxiliary relay, auxiliary relay is provided with the first auxiliary relay normally closed contact and the second auxiliary relay normally closed contact, the first resistance is connected in series between the negative pole of diode and the positive pole of the first electrolytic capacitor, the positive pole of diode is connected with the positive pole of operating power, the negative pole of the first electrolytic capacitor is connected with the negative pole of operating power, one end of first auxiliary relay normally closed contact connects the input of switching winding, and the other end of the first auxiliary relay normally closed contact connects the positive pole of the first electrolytic capacitor, one end of auxiliary relay and one end of the second resistance are connected in series, and the other end of the second resistance is connected with the positive pole of diode, and the other end of auxiliary relay is connected with the negative pole of the first electrolytic capacitor, acoustic-optic alarm is provided with independent current source, switch, the second auxiliary relay normally closed contact, the 3rd resistance, warning lamp and alarm, independent current source, switch, the second auxiliary relay normally closed contact, the 3rd resistance and warning lamp are sequentially connected in series and form loop, and the 3rd resistance and warning lamp are connected in parallel alarm.
As the improvement of technique scheme; described high-tension switch cabinet switching-off device is provided with isolating switch protective device; isolating switch protective device is provided with isolating switch, the 3rd fuse, maintenance control switch, greensignal light, the 4th resistance and the 4th fuse; isolating switch is provided with the first pole and the second pole, and the first pole, the 3rd fuse, maintenance control switch, greensignal light, the 4th resistance, the 4th fuse and the second pole are sequentially connected in series and form loop.
As the improvement of technique scheme, described separating brake protective device is provided with the second electrolytic capacitor, and the second electrolytic capacitor and the first electrolytic capacitor are connected in parallel.
Technique scheme when the short circuit of high-tension switch cabinet opening circuit, operating power because of failed shorted, the power-off of opening circuit high-pressure system, low-pressure system power-off or the power-off of operating power fault time, ensure that switching winding works on by separating brake protective device, provide sub-gate signal; Acoustic-optic alarm and alarm simultaneously, because acoustic-optic alarm adopts independent current source, when separating brake protective device breaks down, when switching winding can not continue separating brake work, acoustic-optic alarm works on, under the warning of acoustic-optic alarm, carry out separating brake by isolating switch protective device, misoperation can not occur; And being provided with maintenance control switch in isolating switch protective device, by maintenance control switch disconnecting switch operation, avoiding, when overhauling, misoperation occurs.
Accompanying drawing explanation
Fig. 1 is high-tension switch cabinet switching-off device structural representation described in the utility model;
Fig. 2 is isolating switch protective device structural representation described in the utility model.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
If Fig. 1, Fig. 1 are high-tension switch cabinet switching-off device structural representation described in the utility model.Described high-tension switch cabinet switching-off device, comprise operating power KM, separating brake stop button T, operating mechanism auxiliary contact DL, switching winding TQ, the first relay dynamic circuit breaker contact ZJ1 and the second relay dynamic circuit breaker contact ZJ2, switching winding TQ is connected with operating power KM, forms loop.Switching winding TQ provides sub-gate signal when working, can power supply in cutoff high switch cubicle in equipment, plays the object of proterctive equipment.Be connected in series separating brake stop button T between the positive pole of operating power KM and switching winding TQ, between separating brake stop button T and switching winding TQ, be connected in series operating mechanism auxiliary contact DL; First relay dynamic circuit breaker contact ZJ1 and the second relay dynamic circuit breaker contact ZJ2 is connected in parallel with the two ends of separating brake stop button T respectively.When the circuit abnormal of high-tension switch cabinet, operating mechanism auxiliary contact DL, the first relay dynamic circuit breaker contact ZJ1 and the second relay dynamic circuit breaker contact ZJ2 acting in conjunction form relaying protection automatic control circuit separating brake; When the first relay dynamic circuit breaker contact ZJ1 and the second relay dynamic circuit breaker contact ZJ2 lost efficacy, carried out manual control circuit separating brake by separating brake stop button T, the equipment in protective circuit.
Described high-tension switch cabinet switching-off device is provided with separating brake protective device, described separating brake protective device is provided with diode D, the first electrolytic capacitor C1, auxiliary relay KA, the first resistance R1 and the second resistance R2, auxiliary relay KA is provided with the first auxiliary relay normally closed contact KA1 and the second auxiliary relay normally closed contact KA2, the first resistance R1 is connected in series between the negative pole of diode D and the positive pole of the first electrolytic capacitor C1, the positive pole of diode D is connected with the positive pole of operating power KM, and the negative pole of the first electrolytic capacitor C1 is connected with the negative pole of operating power KM; The first tie point 1 is provided with between the input of operating mechanism auxiliary contact DL and switching winding TQ, the two ends arranging the second tie point 2, first auxiliary relay normally closed contact KA1 between the first resistance R1 and the positive pole of the first electrolytic capacitor C1 are connected with the first tie point 1 and the second tie point 2 respectively.One end of auxiliary relay KA and one end of the second resistance R2 are connected in series, and the other end of the second resistance R2 is connected with the positive pole of diode D, and the other end of auxiliary relay KA is connected with the negative pole of the first electrolytic capacitor C1.Second resistance R2 current-limiting protection auxiliary relay KA in circuit.
When high-tension switch cabinet opening circuit normal power supply, the positive pole of operating power KM charges in the first electrolytic capacitor C1 through diode D, the first resistance R1, and auxiliary relay KA coil is charged, and the first auxiliary relay normally closed contact KA1 discharges and disconnects.First resistance R1 is current-limiting protection first electrolytic capacitor C1 in circuit.When the high-pressure system power-off of high-tension switch cabinet opening circuit or low-pressure system power-off, the power-off of operating power KM fault; auxiliary relay KA coil blackout; first electrolytic capacitor C1 is through first auxiliary relay normally closed contact KA1(contact point 2 ~ contact point 1) discharge to switching winding TQ; switching winding TQ provides sub-gate signal; power supply in cutoff high switch cubicle in equipment, equipment in protective circuit.
For protecting in described high-tension switch cabinet switching-off device electric elements not because short circuit is burnt; the positive pole of operating power KM and the negative pole of connect between separating brake stop button T access first fuse RD1, operating power KM and the access second fuse RD2 that connects between switching winding TQ.When the short circuit of high-tension switch cabinet opening circuit or operating power KM are because of failed shorted; open circuit is there is in the first fuse RD1 or the second fuse RD2 because of protective circuit; auxiliary relay KA coil blackout; first electrolytic capacitor C1 is through first auxiliary relay normally closed contact KA1(contact point 2 ~ contact point 1) discharge to switching winding TQ; switching winding TQ provides sub-gate signal; power supply in cutoff high switch cubicle in equipment, equipment in protective circuit.For preventing the faults such as the first electrolytic capacitor C1 punctures, open circuit, also the second electrolytic capacitor C2 in parallel on the first electrolytic capacitor C1.When interruption maintenance high-tension switch cabinet opening circuit, note to carry out repeatedly abundant electric discharge over the ground, in case electric capacity residual charge is hurted sb.'s feelings to the first electrolytic capacitor C1 and the second electrolytic capacitor C2.
Described high-tension switch cabinet switching-off device is provided with acoustic-optic alarm, described acoustic-optic alarm is provided with independent current source U, switch S, the second auxiliary relay normally closed contact KA2, the 3rd resistance R3, warning lamp P1 and alarm P2, and independent current source U selects 9V layer-built dry battery.Switch S, the second auxiliary relay normally closed contact KA2, the 3rd resistance R3, warning lamp P1 and independent current source U are connected in series and form loop; second auxiliary relay normally closed contact KA2 and the 3rd resistance R3 is provided with the 3rd tie point 3; the 4th tie point 4 is provided with between the negative pole of warning lamp P1 and independent current source U; two ends the respectively with three tie point 3 of alarm P2 is connected with the 4th tie point 4, and the 3rd resistance R3 plays current-limiting protection effect in circuit.
When high-tension switch cabinet opening circuit normal power supply, the second auxiliary relay normally closed contact KA2 discharges and disconnects, and described acoustic-optic alarm is in wait state.When high-tension switch cabinet opening circuit be short-circuited, operating power KM because of failed shorted, high-pressure system power-off or the fault such as low-pressure system power-off, the power-off of operating power KM fault time, auxiliary relay KA coil blackout, second auxiliary relay normally closed contact KA2 closes, under the effect of independent current source U, warning lamp P1 is bright, and alarm P2 sends ear-piercing chimes of doom.Described acoustic-optic alarm power is not more than 3W, and energy consumption is little, and service time is long; Loudness is not less than 100dB, in the production environment of complexity, also can staff be allowed in time to hear.
Isolating switch G is provided with in high-tension switch cabinet switching-off device; when switching winding TQ, the first electrolytic capacitor C1, the second electrolytic capacitor C2, diode D or auxiliary relay KA etc. break down; when not carrying out manual control circuit separating brake or relaying protection automatic control circuit separating brake by separating brake stop button T, by isolating switch G by force cutoff high switch cubicle run circuitry in total current reach separating brake object.Due to isolating switch G troublesome poeration, especially affect and in emergency circumstances stop power transmission operation, and easily misoperation in maintenance after separating brake.As shown in Figure 2, Fig. 2 is isolating switch protective device structural representation described in the utility model.Described high-tension switch cabinet switching-off device is provided with isolating switch protective device; described isolating switch protective device is provided with isolating switch G; the two poles of the earth of isolating switch G are respectively the first pole G1 and the second pole G2; when described high-tension switch cabinet switching-off device can not carry out manual control circuit separating brake and relaying protection automatic control circuit separating brake, carry out separating brake by disconnecting switch operation G.For ensureing that in operation, equipment is in gate-dividing state, prevent misoperation, isolating switch protective device is provided with maintenance control switch SA and greensignal light HL, greensignal light HL and maintenance control switch SA is connected in series, greensignal light HL series connection the 4th resistance R4 protects, maintenance control switch SA and the first pole G1 is connected in series, and the 4th resistance R4 and the second pole G2 is connected in series; For preventing being short-circuited in circuit, between maintenance control switch SA and the first pole G1, being connected in series the 3rd fuse RD3, between the 4th resistance R4 and the second pole G2, being connected in series the 4th fuse RD4.
Maintenance control switch SA is when needs repair apparatus, is carried out the start and stop operating mode of checkout facility by the procedure lock key be arranged on this switch, during with this switch motion equipment, and the equipment that can not link in other system.When maintenance control switch SA in maintenance position is, maintenance control switch SA provides cutoff switch G can operation signal, and greensignal light HL is bright, can take off procedure lock key, and operation cutoff switch G carries out separating brake, opens cabinet and can carry out maintenance in cabinet after first ground connection behind the door.Remove ground connection after maintenance, close Over-The-Counter door, now HL lamp is still bright, can close a floodgate by disconnecting switch operation G, and procedure lock key is got back on SA, then SA is gone back to run location, and HL lamp extinguishes, and described high-tension switch cabinet switching-off device puts into operation again.
In the above-described embodiments, when the short circuit of high-tension switch cabinet switching-off device, operating power KM because of failed shorted, the power-off of opening circuit high-pressure system, low-pressure system power-off or the power-off of operating power KM fault time, ensure that switching winding TQ works on by separating brake protective device, provide sub-gate signal; Acoustic-optic alarm and alarm simultaneously, because acoustic-optic alarm adopts independent current source, when separating brake protective device breaks down, when switching winding TQ can not continue separating brake work, acoustic-optic alarm works on, under the warning of acoustic-optic alarm, carry out separating brake by isolating switch protective device, misoperation can not occur; And being provided with maintenance control switch SA in isolating switch protective device, by maintenance control switch SA disconnecting switch operation G, avoiding, when overhauling, misoperation occurs.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection range of the present utility model.

Claims (3)

1. a high-tension switch cabinet switching-off device, comprise operating power KM and switching winding TQ, it is characterized in that: described high-tension switch cabinet switching-off device is provided with separating brake protective device and acoustic-optic alarm, described separating brake protective device is provided with diode D, first electrolytic capacitor C1, first resistance R1, second resistance R2 and auxiliary relay KA, auxiliary relay KA is provided with the first auxiliary relay normally closed contact KA1 and the second auxiliary relay normally closed contact KA2, the first resistance R1 is connected in series between the negative pole of described diode D and the positive pole of the first electrolytic capacitor C1, the positive pole of diode D is connected with the positive pole of operating power KM, the negative pole of the first electrolytic capacitor C1 is connected with the negative pole of operating power KM, one end of first auxiliary relay normally closed contact KA1 connects the input of switching winding TQ, and the other end of the first auxiliary relay normally closed contact KA1 connects the positive pole of the first electrolytic capacitor C1, one end of described auxiliary relay KA and one end of the second resistance R2 are connected in series, and the other end of the second resistance R2 is connected with the positive pole of diode D, and the other end of auxiliary relay KA is connected with the negative pole of the first electrolytic capacitor C1, described acoustic-optic alarm is provided with independent current source U, switch S, the second auxiliary relay normally closed contact KA2, the 3rd resistance R3, warning lamp P1 and alarm P2, described independent current source U, switch S, the second auxiliary relay normally closed contact KA2, the 3rd resistance R3 and warning lamp P1 are sequentially connected in series and form loop, and the 3rd resistance R3 and warning lamp P1 is connected in parallel alarm P2.
2. a kind of high-tension switch cabinet switching-off device according to claim 1, it is characterized in that: described high-tension switch cabinet switching-off device is provided with isolating switch protective device, isolating switch protective device is provided with isolating switch G, 3rd fuse RD3, maintenance control switch SA, greensignal light HL, 4th resistance R4 and the 4th fuse RD4, isolating switch G is provided with the first pole G1 and the second pole G2, first pole G1, 3rd fuse RD3, maintenance control switch SA, greensignal light HL, 4th resistance R4, 4th fuse RD4 and the second pole G2 is sequentially connected in series and forms loop.
3. a kind of high-tension switch cabinet switching-off device according to claim 1, is characterized in that: described separating brake protective device is provided with the second electrolytic capacitor C2, the second electrolytic capacitor C2 and the first electrolytic capacitor C1 is connected in parallel.
CN201520422821.4U 2015-06-18 2015-06-18 A kind of high-tension switch cabinet switching-off device Active CN204706818U (en)

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CN201520422821.4U CN204706818U (en) 2015-06-18 2015-06-18 A kind of high-tension switch cabinet switching-off device

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Application Number Priority Date Filing Date Title
CN201520422821.4U CN204706818U (en) 2015-06-18 2015-06-18 A kind of high-tension switch cabinet switching-off device

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107680332A (en) * 2017-09-29 2018-02-09 中冶华天南京电气工程技术有限公司 One kind prevents high-tension switch cabinet maloperation alarming device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107680332A (en) * 2017-09-29 2018-02-09 中冶华天南京电气工程技术有限公司 One kind prevents high-tension switch cabinet maloperation alarming device
CN107680332B (en) * 2017-09-29 2020-05-08 中冶华天南京电气工程技术有限公司 Warning device for preventing misoperation of high-voltage switch cabinet

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