CN203660508U - Improved FC switch control circuit - Google Patents
Improved FC switch control circuit Download PDFInfo
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- CN203660508U CN203660508U CN201320869619.7U CN201320869619U CN203660508U CN 203660508 U CN203660508 U CN 203660508U CN 201320869619 U CN201320869619 U CN 201320869619U CN 203660508 U CN203660508 U CN 203660508U
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- 238000012546 transfer Methods 0.000 claims description 5
- 230000001939 inductive effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 5
- 238000012360 testing method Methods 0.000 abstract description 2
- 230000008859 change Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
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- 230000007774 longterm Effects 0.000 description 1
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Abstract
The utility model discloses an improved FC switch control circuit. The tripping maintaining function of an original anti-tripping relay is kept, so as to prevent contacts from being burnt by a protection or control circuit contact arc. The newly-added anti-tripping relay is not started by an original anti-tripping relay current circuit but is started by a closing circuit. The TBJ is started as long as the K15 and the ZJ operate at the same time, the closing circuit of the F-C switch is cut off, and the anti-tripping and reliable tripping purposes are achieved. After the control circuit is improved, even if the closing nodes of the switch are closed all the time, reliable tripping of the switch can be realized in case of a tripping instruction, and the problem that switch tripping fails to operate in the former FC switch control circuit can be completely solved. After long-time practice test, the effects are excellent, the equipment operates reliably, and high popularization values are provided in power enterprises.
Description
Technical field
The utility model relates to thermal power generation unit field, relates in particular to a kind of improved FC switch control circuit.
Background technology
High-pressure vacuum contactor and high-tension fuse are as the main switchgear of power plant control and protection 6kV high-tension motor, application is very extensive at home at present, high-pressure vacuum contactor and high-tension fuse are combined into F-C loop, become the high-pressure vacuum contactor-fuse combined electric apparatus with integrated protection characteristic, greatly reduce system cost; There is its unique advantage in F-C loop on control and protection motor, can more effective protection load.Therefore the reliability in contactor control and protection loop is outstanding aobvious important concerning F-C switch loop.
Easily there is the tripping of FC switch trip in current FC switch designs, the phenomenon of burning switch badly influences the safe and stable operation of unit in unit running process.
Utility model content
The purpose of this utility model is exactly in order to address the above problem, and has proposed a kind of improved 6kV FC switch control circuit, and this loop has thoroughly solved the switch trip tripping problem that contactor control loop exists in the past, possesses in actual applications obvious advantage.
To achieve these goals, the utility model adopts following technical scheme:
A kind of improved FC switch control circuit, comprising:
The first branch road: light-emitting diode HG, tripping position relay KTP coil, switch auxiliary contact H
2be connected in series successively with closing relay K15 coil, distant place combined floodgate contact DCS HZ is attempted by the series arm two ends of light-emitting diode HG and tripping position relay KTP coil.
The second branch road: normally opened contact one and the combined floodgate latching relay K16 coil of closing relay K15 are connected in series.
The 3rd branch road: shunt circuit, the anti-trip relay TBJ coil of normally opened contact two, the normally opened contact of the heavy motor type relay ZJ of closing position and the normally opened contact of anti-trip relay TBJ of closing relay K15 are connected in series successively; The normally opened contact two of closing relay K15 accesses FC switch closing circuit after connecting successively with the five-defence block contact LXW of anti-trip relay TBJ normally-closed contact one, anti-trip relay TBJ normally-closed contact two, switch simultaneously.
The 4th branch road: the normally opened contact of anti-trip relay KLT.A, the normally-closed contact of KPL.T, anti-trip relay KLT.A coil are in parallel with the series arm of light-emitting diode HR and closing operation position relay KCP coil after connecting successively, the breaking coil of access FC switch after in parallel, transfer trip contact DCS TZ is in parallel with the normally opened contact of anti-trip relay KLT.A.
The 5th branch road: switch auxiliary contact H
2connect with the heavy motor type relay ZJ of closing position coil.
Normally-closed contact one end of combined floodgate latching relay K16 is connected on the switch auxiliary contact H of described the first branch road
2and between closing relay K15, the other end is connected between the closing relay K15 normally opened contact one and combined floodgate latching relay K16 of described the second branch road.
Described five branch roads are connected in parallel successively.
Described anti-trip relay TBJ selects to cut off the high power relay of larger inductive load electric current.
The heavy motor type relay ZJ of described closing position selects deferred action formula electromagnetism auxiliary relay, will be controlled at 80ms-90ms relay actuation time.
When combined floodgate; DCS instruction starts closing relay K15; after K15 starts, do in short-term and keep by combined floodgate latching relay K16; long to ensure reclosing command enough time; ensure that FC switch reliably closes a floodgate; when cutting off closing circuits by two pairs of series connection contacts of anti-trip relay TBJ after the reliable combined floodgate of switch; reclosing command is disconnected; while having ensured that switch is received trip command, can because can not disconnecting, a variety of causes can not trip because of the switch contact that closes a floodgate; two pairs of TBJ series connection promises TBJ cut off arcing minimum when closing circuit, protected TBJ contact.
The beneficial effects of the utility model are:
The tripping operation that the utility model retains former anti-trip relay in control loop keeps function; burn contact to prevent protection or the arcing of control loop contact; newly-increased anti-trip relay is no longer by former anti-jump relay current loop start; start but change by closing circuit; as long as just start TBJ when K15, ZJ move simultaneously; cut off F-C switch closing circuit, reach the object of anti-jump and reliable trip.
After control loop improves, even if switch combined floodgate node is always closed, in the time having trip command, also can make switch reliable trip, thoroughly solved the problem that switch trip tripping easily appears in FC switch control circuit in the past, through long-term practice test, effect is good, equipment is reliable, has high promotional value at electric power enterprise.
Brief description of the drawings
Fig. 1 is the improved FC switch control circuit of the utility model schematic diagram;
Embodiment:
Below in conjunction with accompanying drawing and embodiment, the utility model is described further:
As shown in Figure 1, a kind of improved FC switch control circuit, comprising:
The first branch road: light-emitting diode HG, tripping position relay KTP coil, switch auxiliary contact H2 and closing relay K15 coil are connected in series successively, distant place combined floodgate contact DCS HZ is attempted by the series arm two ends of light-emitting diode HG and tripping position relay KTP coil.
The reclosing command action that distant place combined floodgate contact DCS HZ sends according to unit distribute computer control system.
The second branch road: normally opened contact one and the combined floodgate latching relay K16 coil of closing relay K15 are connected in series.
The 3rd branch road: shunt circuit, the anti-trip relay TBJ coil of normally opened contact two, the normally opened contact of the heavy motor type relay ZJ of closing position and the normally opened contact of anti-trip relay TBJ of closing relay K15 are connected in series successively; The normally opened contact two of closing relay K15 accesses FC switch closing circuit after connecting successively with the five-defence block contact LXW of anti-trip relay TBJ normally-closed contact one, anti-trip relay TBJ normally-closed contact two, switch simultaneously.
The 4th branch road: the normally opened contact of anti-trip relay KLT.A, the normally-closed contact of KPL.T, anti-trip relay KLT.A coil are in parallel with the series arm of light-emitting diode HR and closing operation position relay KCP coil after connecting successively, the breaking coil of access FC switch after in parallel, transfer trip contact DCS TZ is in parallel with the normally opened contact of anti-trip relay KLT.A.
The trip command action that transfer trip contact DCS TZ sends according to unit distribute computer control system.
The 5th branch road: switch auxiliary contact H
2connect with the heavy motor type relay ZJ of closing position coil.
Normally-closed contact one end of combined floodgate latching relay K16 is connected between the switch auxiliary contact H2 and closing relay K15 of described the first branch road, the other end is connected between the closing relay K15 normally opened contact one and combined floodgate latching relay K16 of described the second branch road.
After being connected in parallel successively, above-mentioned five branch roads access power supply.
The each element of control loop is described as follows:
HG: light-emitting diode is red light, shows when lamp is bright that switch is at open position; KIP: tripping position relay, shows when action that switch is at open position; K15: closing relay, in order to expand DCS reclosing command; K16: combined floodgate latching relay, makes switch can obtain sufficiently long closing time and close a floodgate successfully to guarantee switch; KLT.A: former anti-trip relay, after transformation, only play maintenance trip(ping) circuit, make the effect of switch reliable trip, anti creep performance does not recur; HR: light-emitting diode is red light, shows when lamp is bright that switch is at closing position; KCP: closing operation position relay, shows when action that switch is at closing position; ZJ: the heavy motor type relay of closing position, in order to obtain than the switch closing position signal of the slow 80ms of switch auxiliary contact; TBJ: anti-trip relay, plays and prevents that switch from jumping, and cuts off the effect of closing circuit electric arc; DCS HZ: distant place reclosing command; DCS TZ: transfer trip contact; H2: switch auxiliary contact;
FC switch inner member is described as follows:
K2S: the inner tripping relay of switch; K2E: breaking coil, in order to produce tripping operation electromagnetic force; KIM: closing coil, in order to produce combined floodgate electromagnetic force; KIE: the inner closing relay of switching on/off handcart; H1: switch auxiliary contact; LXW: five-defence block contact; XK1: switch main fuse fusing contact;
When combined floodgate; DCS instruction starts closing relay K15; after K15 starts, do in short-term and keep by combined floodgate latching relay K16; long to ensure reclosing command enough time; ensure that FC switch reliably closes a floodgate; when cutting off closing circuits by two pairs of series connection contacts of anti-trip relay TBJ after the reliable combined floodgate of switch; reclosing command is disconnected; while having ensured that switch is received trip command, can because can not disconnecting, a variety of causes can not trip because of the switch contact that closes a floodgate; two pairs of TBJ series connection promises TBJ cut off arcing minimum when closing circuit, protected TBJ contact.
The tripping operation that retains former anti-trip relay in control loop keeps function; burn contact to prevent protection or the arcing of control loop contact; newly-increased anti-trip relay is no longer by former anti-jump relay current loop start; start but change by closing circuit; as long as just start TBJ when K15, ZJ move simultaneously; cut off F-C switch closing circuit, reach the object of anti-jump and reliable trip.
As shown in Figure 1, TBJ all can move cut-out switching current in the time that each switch closes a floodgate, thus need to select can cut off the high power relay of larger inductive load electric current, and by its two pairs of normally closed contacts its current interruption abilities of increase of connecting.
The effect that uses the heavily moving H2 contact of ZJ to restart TBJ is in order to make switch combined floodgate auxiliary relay KIM obtain enough conduction time, the time difference (often open and become normally closed point and normal time difference of making war of normally closed change) that auxiliary contact switch in vacuum contactor making process.
ZJ pull up time will exceed the combined floodgate of 40ms ability Reliable guarantee F-C switch, therefore ZJ should select the deferred action formula electromagnetism auxiliary relay that exceedes 40ms operate time.
In actual applications, the action arrival time of F-C switch combined floodgate electromagnetically operated valve is not changeless, so sometimes also there will be combined floodgate Problem of Failure after switch a period of time, although ZJ relay service time can address this problem, but time relay action is also unreliable, and can not be controlled at operate time in ms level, this and equipment require the QA requirement of relaying protection can clash again while being combined in fault, therefore need to find the ZJ relay that operate time preferably can be within the scope of 80ms-90ms, for example ZJY-228 type relay, close a floodgate and the QA contradiction of relaying protection reliably to solve.
By reference to the accompanying drawings embodiment of the present utility model is described although above-mentioned; but the not restriction to the utility model protection range; one of ordinary skill in the art should be understood that; on the basis of the technical solution of the utility model, those skilled in the art do not need to pay various amendments that creative work can make or distortion still in protection range of the present utility model.
Claims (3)
1. an improved FC switch control circuit, is characterized in that, comprising:
The first branch road: light-emitting diode HG, tripping position relay KTP coil, switch auxiliary contact H
2be connected in series successively with closing relay K15 coil, distant place combined floodgate contact DCS HZ is attempted by the series arm two ends of light-emitting diode HG and tripping position relay KTP coil;
The second branch road: normally opened contact one and the combined floodgate latching relay K16 coil of closing relay K15 are connected in series;
The 3rd branch road: shunt circuit, the anti-trip relay TBJ coil of normally opened contact two, the normally opened contact of the heavy motor type relay ZJ of closing position and the normally opened contact of anti-trip relay TBJ of closing relay K15 are connected in series successively; The normally opened contact two of closing relay K15 accesses FC switch closing circuit after connecting successively with the five-defence block contact LXW of anti-trip relay TBJ normally-closed contact one, anti-trip relay TBJ normally-closed contact two, switch simultaneously;
The 4th branch road: the normally opened contact of anti-trip relay KLT.A, the normally-closed contact of KPL.T, anti-trip relay KLT.A coil are in parallel with the series arm of light-emitting diode HR and closing operation position relay KCP coil after connecting successively, the breaking coil of access FC switch after in parallel, transfer trip contact DCS TZ is in parallel with the normally opened contact of anti-trip relay KLT.A;
The 5th branch road: switch auxiliary contact H2 connects with the heavy motor type relay ZJ of closing position coil;
Normally-closed contact one end of combined floodgate latching relay K16 is connected on the switch auxiliary contact H of described the first branch road
2and between closing relay K15, the other end is connected between the closing relay K15 normally opened contact one and combined floodgate latching relay K16 of described the second branch road;
Described five branch roads are connected in parallel successively.
2. the improved FC switch control circuit of one as claimed in claim 1, is characterized in that, described anti-trip relay TBJ selects to cut off the high power relay of larger inductive load electric current.
3. the improved FC switch control circuit of one as claimed in claim 1, is characterized in that, the heavy motor type relay ZJ of described closing position selects deferred action formula electromagnetism auxiliary relay, will be controlled at 80ms-90ms relay actuation time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320869619.7U CN203660508U (en) | 2013-12-26 | 2013-12-26 | Improved FC switch control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320869619.7U CN203660508U (en) | 2013-12-26 | 2013-12-26 | Improved FC switch control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203660508U true CN203660508U (en) | 2014-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320869619.7U Expired - Lifetime CN203660508U (en) | 2013-12-26 | 2013-12-26 | Improved FC switch control circuit |
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| CN (1) | CN203660508U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103647255A (en) * | 2013-12-26 | 2014-03-19 | 大唐黄岛发电有限责任公司 | Improved FC switch control loop |
| CN105591363A (en) * | 2016-03-10 | 2016-05-18 | 大唐贵州发耳发电有限公司 | High-voltage motor accident control circuit |
| CN107181238A (en) * | 2017-07-18 | 2017-09-19 | 攀钢集团西昌钢钒有限公司 | Distribution system high-voltage motor control loop |
-
2013
- 2013-12-26 CN CN201320869619.7U patent/CN203660508U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103647255A (en) * | 2013-12-26 | 2014-03-19 | 大唐黄岛发电有限责任公司 | Improved FC switch control loop |
| CN105591363A (en) * | 2016-03-10 | 2016-05-18 | 大唐贵州发耳发电有限公司 | High-voltage motor accident control circuit |
| CN105591363B (en) * | 2016-03-10 | 2019-03-05 | 大唐贵州发耳发电有限公司 | A kind of high-tension motor accident control circuit |
| CN107181238A (en) * | 2017-07-18 | 2017-09-19 | 攀钢集团西昌钢钒有限公司 | Distribution system high-voltage motor control loop |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140618 |