CN101465525B - High voltage frequency changer isolation trolley type high voltage switch cabinet - Google Patents
High voltage frequency changer isolation trolley type high voltage switch cabinet Download PDFInfo
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- CN101465525B CN101465525B CN2009100011185A CN200910001118A CN101465525B CN 101465525 B CN101465525 B CN 101465525B CN 2009100011185 A CN2009100011185 A CN 2009100011185A CN 200910001118 A CN200910001118 A CN 200910001118A CN 101465525 B CN101465525 B CN 101465525B
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- 238000002955 isolation Methods 0.000 title claims abstract description 27
- 238000012423 maintenance Methods 0.000 abstract description 5
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- 238000013461 design Methods 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
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- 230000008859 change Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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- 230000008569 process Effects 0.000 description 1
- APTZNLHMIGJTEW-UHFFFAOYSA-N pyraflufen-ethyl Chemical compound C1=C(Cl)C(OCC(=O)OCC)=CC(C=2C(=C(OC(F)F)N(C)N=2)Cl)=C1F APTZNLHMIGJTEW-UHFFFAOYSA-N 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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- 229910052710 silicon Inorganic materials 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention discloses a switch cabinet which is applied to the input side and the output side of a high-voltage frequency converter; the switch cabinet is characterized in that: a contactor (K1) for controlling the switch of the input side of the high-voltage frequency converter, a contactor (K2) for controlling the switch of the output side thereof and a contactor (K3) for power frequency switching over are arranged in the switch cabinet; two separating trolley type high-voltage separating switches (QS1, QS2) are arranged at the outer sides of the contactor (K1) of the input side and the contactor (K2) of the output side; the two separating trolley type high-voltage separating switches (QS1, QS2) are respectively composed of three fixed contacts and three moving contacts; six pairs of switch contacts can be arranged in a smaller space by adopting the structure; when maintaining the switch cabinet, the trolley is pulled out, and obvious visual break point exists in a high-voltage loop, thus realizing electric isolation between the high-voltage output side and the cabinet output side and the high-voltage frequency conversion and ensuring maintenance work to be safe.
Description
Technical field
The invention belongs to the high-tension switch cabinet technical field, be specifically related to the high voltage frequency changer isolation trolley type high voltage switch cabinet of high-voltage variable-frequency and variable-speed system.
Background technology
Along with developing rapidly of modern power electronics technology and Computer Control Technology, promoted the technological revolution of electric drive.AC speed regulating replaces DC speed regulation, and computer numerical control (CNC) replaces simulation control has become development trend.Ac motor speed control by variable frequency is current saves energy, improves the technological process of production, improve the quality of products, and a kind of main means of improving running environment.Frequency control is with its high efficiency, High Power Factor, and excellent speed governing and open plurality of advantages such as braking ability and be known as the most rising mode of speed regulation both at home and abroad.
High voltage converter in the past, by silicon controlled rectifier, devices such as thyristor inversion constitute, and shortcoming is a lot, and harmonic wave is big, and is all influential to electrical network and motor.In recent years, some new devices that grow up will change this present situation, as IGBT, IGCT, SGCT or the like.By the high voltage converter that they constitute, excellent performance can be realized the PWM inversion, or even the PWM rectification.It is little not only to have harmonic wave, and power factor also has significant improvement.
Develop rapidly along with science and technology, high voltage converter is as a kind of new high-tech product, in the numerous high-power equipment such as thermal power plant, oil, chemical industry, running water, mine, metallurgy that the is applied to enterprise just more and more widely, and with its speed governing, soft start and intelligent control aspect superiority obtained the extensive approval of industry.
At present, the input and output of the supporting high pressure main circuit of high-voltage variable-frequency and variable-speed system are isolated dual mode: mode one is to utilize the high-tension switch cabinet of onsite user's side; Mode two is respectively input side isolation trolley and outlet side isolation trolley to be installed in respectively in two switch cubicles.Mode one is that structure is simpler, but can't see tangible electric breakpoint at the frequency converter scene, and not only control is complicated, and device is safeguarded or have very big potential safety hazard during the bypass operation; Though mode two can be seen tangible electric breakpoint at the device scene, but still need two independent switch cubicles, structure is complicated, the failure rate height.
Summary of the invention
For overcoming the above-mentioned problems in the prior art, the present invention proposes a kind of high voltage frequency changer isolation trolley type switch cubicle, the fairly simple and safety of this switch cubicle operation manually can push and pull out automatically, can guarantee contacting and cooperation of contact and contact base; When carrying out plant maintenance, the high pressure governing system can be transformed into work under the power frequency state, can reduce the direct economic loss that the user is caused.
The present invention is specifically by the following technical solutions:
A kind of high voltage frequency changer isolation trolley type high voltage switch cabinet, comprise cabinet, input isolating switch QS1, output isolating switch QS2, inlet wire contactor K1, outlet contactor K2, bypass contactor K3, described input isolating switch QS1, output isolating switch QS2, inlet wire contactor K1, outlet contactor K2, bypass contactor K3 are installed in the described cabinet, it is characterized by:
The three-phase high-voltage inlet wire is connected to the fixed contact of the input isolating switch QS1 in the cabinet, the moving contact of described input isolating switch QS1 is wired to the inlet wire side of described inlet wire contactor K1, the outlet side of inlet wire contactor K1 links to each other with the former limit of the transformer in the high voltage converter, three-phase converter module in the described high voltage converter is connected to the inlet wire side of described outlet contactor K2 by lead, the outlet side of described outlet contactor K2 is connected to the fixed contact of described output isolating switch QS2, and the moving contact of described output isolating switch QS2 links to each other with load;
The moving contact of the side of described bypass contactor K3 and described output isolating switch QS2 also connects, and the other end links to each other with the fixed contact of described input isolating switch QS1.
Described inlet wire contactor K1, outlet contactor K2, bypass contactor K3 have the electrical interlocks function, and promptly when having one to be in "on" position among described inlet wire contactor K1, the outlet contactor K2, then bypass contactor K3 locking can not closing operation; When bypass contactor K3 was in "on" position, inlet wire contactor K1, outlet contactor (K2) locking can not be carried out closing operation.
The switch cubicle of the present invention's design has improved the safety inspection coefficient for collection input isolation trolley cabinet and the combined high pressure switch cubicle that output isolation trolley cabinet unites two into one reduce cost.Switch cubicle unites two into one QS1 and QS2, has reduced the size of switch cubicle, and has reduced this kind switch cubicle volume; Wherein can be enough between each contactor and each electric components may be the shortest distance and couple together with minimum electrical connecting wires.
The present invention designs between the conductive component that switch cubicle is installed in electric component in the cabinet or electric clearance and creepage distance between conductive component (as bus, metal frame or metallic object) and another conductive component all satisfy State Grid's standard.
This product structure is simple, fortune easy to use, and row is safe and reliable, convenient maintenance.Not only convenient maintenance, can also extension fixture useful life, eliminate hazards such as blast, fire.
Description of drawings
Fig. 1 switch cubicle front panel figure;
Fig. 2 switch cubicle front view;
Fig. 3 switch cubicle left view;
Fig. 4 switch cubicle main circuit diagram;
Fig. 5 switch cubicle rearview;
Fig. 6 control loop schematic diagram.
Wherein, the implication of Reference numeral is as follows:
The 1--high voltage display device, the 2--K3 trip button, the 3--K3 switch knob, 4--converting operation indicator light, 5--power frequency operation indicator light, 6--bypass contactor K3,7-12--bypass contactor K3 main contacts, 13--isolation trolley action component, 14-16--QS2 moving contact, 17-19--QS1 moving contact, 20--isolation trolley crank way, 21--inlet wire control contactor K2,22-27--K2 main electrical scheme terminal, 28--current transformer, 29-30--current transformer main electrical scheme terminal, the 31-33--QS2 fixed contact, 34-36--QS1 fixed contact, 37--isolation trolley static part, 38--input side contactor K1,39-44--K1 main electrical scheme terminal, 45-47--high voltage display device transducer, 48-50--lightning arrester.
Embodiment
According to Figure of description technical scheme of the present invention is described in further detail below.
Be illustrated in figure 1 as the front panel figure of switch cubicle of the present invention, Fig. 2 is the front view of switch cubicle, and Fig. 3 is the left view of switch cubicle, and Fig. 5 is the rearview of switch.
High voltage converter is isolated handcart switch cabinet, comprise cabinet, vacuum contactor K1 (38), K2 (6), K3 (21), 28,3 lightning arresters of 13,37, current transformers of isolation trolley 48,49,50, three charged demonstrations a transducer 45,46,47 and charged display unit 1 that comprise 2 groups of switches (QS1 and QS2), converting operation indicator light 4 and power frequency operation indicator light 5 are installed on the cabinet Qianmen, and lower end, cabinet Qianmen is equipped with bypass contactor K3 switch knob 3 and opening button 4.
Three-phase vacuum contactor K1 is used for the control of high voltage converter main circuit inlet wire side switch, three-phase vacuum contactor K2 is used for the control of high voltage converter main circuit outlet side switch, three-phase vacuum contactor K3 is used for the control of high voltage converter bypass (and power frequency operation) switch, wherein K1 (38) is that electricity keeps with K2 (6), and K3 is that machinery keeps.Isolation trolley (QS1 and QS2) is the relevant integrated morphology of 2*3, say definitely and will comprise 6 fixed contacts and 6 moving contacts exactly, 3 fixed contacts and 3 moving contacts of following row are formed QS1,3 fixed contacts and 3 moving contacts of last row are formed QS2, the middle-end of moving contact all has row's binding post, QS1 and QS2 are two groups of switches independently, and the high pressure that is respectively applied for inlet wire side and outlet side is isolated.Current transformer 28 is series in the A phase input circuit and is used to measure input current.3 lightning arresters 48 49 50 are connected between input three-phase and the cabinet earth electrode, are used to prevent net survey thunderbolt.The transducer 45 4647 of three-phase high-voltage Charging system is associated with between three-phase input and the earth electrode, and its low pressure outlet side exports the charged display unit 1 of front door panel upside to.Converting operation indicator light 4 is installed in upper end, cabinet Qianmen with power frequency operation indicator light 5, control after converting operation indicator light 4 break-makes are connected with the auxiliary contact of K2 by K1 respectively, and power frequency operation indicator light 5 is by the auxiliary contact control of K3.K3 is mechanical freeze mode contactor, promptly it still can keep closing state after the closing coil energising is closed it and disconnected, promptly it still can keep disconnected state with its tripping operation and after disconnecting when the breaking coil energising, and the combined floodgate separating brake of K3 is respectively by switch knob on the panel 3 and opening button 2 controls.Isolating switch QS1 is connected between high pressure inlet wire and inlet wire contactor K1 in the isolation trolley, and the high pressure that is used for the inlet wire side of high voltage converter is isolated; QS2 is connected between outlet side contactor and the output line, and the high pressure that is used for high voltage converter outlet side is isolated.
Be illustrated in figure 4 as switch cubicle main circuit diagram of the present invention, the system high pressure inlet wire is received on the fixed contact of QS1, three-phase is corresponding A-34 respectively, B-35, C-36, receive the input side terminal 40,42,44 of K1 via the moving contact of QS1, the transformer end of incoming cables that the outlet side 39,41,43 of K1 is received high voltage converter (does not belong to this patent scope, do not give unnecessary details), be connected to the used transducer of lightning arrester 48,49,50 and high voltage display device 45,46,47 between QS1 moving contact and K1, A also is in series with current transformer in mutually, in order to measure input current value.The output of high voltage converter three-phase converter module is connected to the inlet wire side 7,9,11 of K2, and the outlet side 8,10,12 of K2 is connected to respectively on the moving contact 14,15,16 of isolation trolley QS2, and the moving contact 31,32,33 of QS2 is connected to the outer load-side of cabinet.The input terminal 23,25,27 of by-pass switch K3 respectively with input terminal 40,42,44 short circuits of K1, the outlet side terminal 22,24,26 of K3 joins with the fixed contact 34,35,36 of QS2 respectively.
Be illustrated in figure 6 as switch cubicle control loop schematic diagram of the present invention, the operating power of contactor K1 K2 K3 is DC220V.K3 is mechanical maintenance, and the loop that its closing circuit is made up of the normally opened contact of closing relay K3HZJ, the auxiliary normally opened contact of K1, the auxiliary normally opened contact of K2 constitutes, can not closing operation thereby be implemented under K1 or the K2 "on" position K3; The separating brake of K3 is controlled by tripping relay K3TZJ; The DC24V circuit controls that K3HZJ and K3TZJ are made up of switch knob on the panel 3 and opening button 2 respectively, the personal safety when low voltage operated loop guarantees to operate.The combined floodgate sub-switching operation of contactor K1 is controlled by K1HZJ, and the combined floodgate sub-switching operation of contactor K2 is controlled by K2HZJ, and K1HZJ and K2HZJ are respectively by the DC24V signal controlling of the K1H and the K2H of master controller side.Converting operation indicator light 4 on the panel is the DC220V power supply, and by the K1 control of connecting with the normally opened contact of K2, the power frequency operation indicator light is controlled by the normally opened contact of bypass contactor.
Under the normal condition, QS1 and QS2 all shift working position onto, and K1 and K2 close, and K3 disconnects, and realize converting operation.If frequency converter failure or when safeguarding only need all disconnect K1 and K2, QS1 and QS2 are pulled to test then, it is just passable manually bypass contactor K3 to be closed; Because QS1 and QS2 have all formed tangible visual breakpoint at the input side outlet side of device respectively, the assurance electrical isolation is so can guarantee safety when safeguarding.The present invention is integrated into two isolation trolleys in the switch cubicle of high-pressure frequency-conversion, realizes the electrical isolation of input and output side, and operation has guaranteed safety easily, has very strong The field and is worth.
Claims (6)
1. high voltage frequency changer isolation trolley type high voltage switch cabinet, comprise cabinet, input isolating switch (QS1), output isolating switch (QS2), inlet wire contactor (K1), outlet contactor (K2), bypass contactor (K3), described input isolating switch (QS1), output isolating switch (QS2), inlet wire contactor (K1), outlet contactor (K2), bypass contactor (K3) are installed in the described cabinet, it is characterized by:
The three-phase high-voltage inlet wire is connected to the fixed contact of the input isolating switch (QS1) in the cabinet, the moving contact of described input isolating switch (QS1) is wired to the inlet wire side of described inlet wire contactor (K1), the outlet side of inlet wire contactor (K1) links to each other with the former limit of the transformer in the high voltage converter, three-phase converter module in the described high voltage converter is connected to the inlet wire side of described outlet contactor (K2) by lead, the outlet side of described outlet contactor (K2) is connected to the fixed contact of described output isolating switch (QS2), and the moving contact of described output isolating switch (QS2) links to each other with load;
The moving contact of one side of described bypass contactor (K3) and described output isolating switch (QS2) also connects, and the other end links to each other with the fixed contact of described input isolating switch (QS1).
2. high voltage frequency changer isolation trolley type high voltage switch cabinet according to claim 1, it is characterized in that: described inlet wire contactor (K1), outlet contactor (K2), bypass contactor (K3) have the electrical interlocks function, promptly when having one to be in "on" position in described inlet wire contactor (K1), the outlet contactor (K2), then bypass contactor (K3) locking can not closing operation; When bypass contactor (K3) when being in "on" position, inlet wire contactor (K1), outlet contactor (K2) locking can not be carried out closing operation.
3. high voltage frequency changer isolation trolley type high voltage switch cabinet according to claim 1, it is characterized in that: high voltage frequency changer isolation trolley type high voltage switch cabinet also comprises the lightning arrester summation current transformer, and described lightning arrester and described current transformer are installed on the lead between described input isolating switch (QS1) and described input contactor (K1) the inlet wire side.
4. high voltage frequency changer isolation trolley type high voltage switch cabinet according to claim 1 and 2, it is characterized in that: described cabinet comprises front cabinet door, switch knob (HA) and the opening button (TA) of bypass contactor (K3) are installed on front cabinet door, described bypass contactor (K3) is mechanical freeze mode contactor, manually close the branch operation by described switch knob (HA) and opening button (TA), described switch knob (HA) is connected in the direct current operative power source loop of 24V with the closing relay (K3HZJ) of described bypass contactor (K3), and described opening button (TA) is connected in the direct current operative power source loop of 24V with the tripping relay (K3TZJ) of bypass contactor (K3);
Normally-closed contact, the normally-closed contact of outlet contactor (K2) and the closing coil (K3HZ) of bypass contactor (K3) of often driving auxiliary contact (K3HZJ) and described inlet wire contactor (K1) of the closing relay (K3TZJ) of described bypass contactor (K3) are connected in the 220V direct current operative power source loop;
The breaking coil (K3TZ) of often opening auxiliary contact (K3TZJ) and bypass contactor (K3) of the tripping relay (K3TZJ) of described bypass contactor (K3) is connected in the 220V direct current operative power source loop.
5. high voltage frequency changer isolation trolley type high voltage switch cabinet according to claim 4, it is characterized in that: the combined floodgate of described inlet wire contactor (K1) is realized by the combined floodgate auxiliary contact (K1H) of control inlet wire contactor (K1) that by master controller the combined floodgate of described outlet contactor (K2) is realized by the combined floodgate auxiliary contact (K2H) of control outlet contactor (K2) by master controller.
6. high voltage frequency changer isolation trolley type high voltage switch cabinet according to claim 5, it is characterized in that: also be provided with power frequency operation indicator light and converting operation indicator light on the front cabinet door of described cabinet, when bypass contactor (K3) closed a floodgate, the power frequency operation indicator light was bright; When described inlet wire contactor (K1), outlet contactor (K2) were all closed, the converting operation indicator light was bright.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100011185A CN101465525B (en) | 2009-01-23 | 2009-01-23 | High voltage frequency changer isolation trolley type high voltage switch cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100011185A CN101465525B (en) | 2009-01-23 | 2009-01-23 | High voltage frequency changer isolation trolley type high voltage switch cabinet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101465525A CN101465525A (en) | 2009-06-24 |
| CN101465525B true CN101465525B (en) | 2010-11-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100011185A Expired - Fee Related CN101465525B (en) | 2009-01-23 | 2009-01-23 | High voltage frequency changer isolation trolley type high voltage switch cabinet |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103825509A (en) * | 2014-01-24 | 2014-05-28 | 宁波钢铁有限公司 | Device applied to startup and operation of high-power motors |
| CN105552769A (en) * | 2014-07-18 | 2016-05-04 | 国家电网公司 | Control circuit for multifunctional electricity-verification and grounding trolley for centrally installed switchgear |
| CN115764589B (en) * | 2022-11-17 | 2025-08-01 | 山东泰开自动化有限公司 | Manual bypass control cabinet of small-size integration |
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2009
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| CN101465525A (en) | 2009-06-24 |
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Address after: 238339 Anhui province Wuwei County Dingxing Industrial Zone Patentee after: ANHUI CHANGFENG CABLE GROUP Co.,Ltd. Patentee after: ANHUI E S ELECTRIC TECHNOLOGY Co.,Ltd. Address before: 238339 Anhui province Wuwei County Dingxing Industrial Zone Patentee before: ANHUI CHANGFENG CABLE GROUP Co.,Ltd. Patentee before: Anhui Ousai Electronic Technology Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |
Address after: 238339 Anhui province Wuwei County Dingxing Industrial Zone Co-patentee after: Anhui European Electric Limited by Share Ltd. Patentee after: ANHUI CHANGFENG CABLE GROUP Co.,Ltd. Address before: 238339 Anhui province Wuwei County Dingxing Industrial Zone Co-patentee before: ANHUI E S ELECTRIC TECHNOLOGY Co.,Ltd. Patentee before: ANHUI CHANGFENG CABLE GROUP Co.,Ltd. |
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Effective date of registration: 20171031 Address after: 238339 Anhui city of Wuhu province Wuwei County Dingxing Industrial Zone Patentee after: Anhui European Electric Limited by Share Ltd. Address before: 238339 Anhui province Wuwei County Dingxing Industrial Zone Co-patentee before: Anhui European Electric Limited by Share Ltd. Patentee before: ANHUI CHANGFENG CABLE GROUP Co.,Ltd. |
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Granted publication date: 20101110 Termination date: 20180123 |
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| CF01 | Termination of patent right due to non-payment of annual fee |