CN108987136A - A kind of switch operating mechanism - Google Patents
A kind of switch operating mechanism Download PDFInfo
- Publication number
- CN108987136A CN108987136A CN201710414840.6A CN201710414840A CN108987136A CN 108987136 A CN108987136 A CN 108987136A CN 201710414840 A CN201710414840 A CN 201710414840A CN 108987136 A CN108987136 A CN 108987136A
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- Prior art keywords
- relay
- separating brake
- normally opened
- contact
- opened contact
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
- H01H3/26—Power arrangements internal to the switch for operating the driving mechanism using dynamo-electric motor
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- Stopping Of Electric Motors (AREA)
Abstract
The present invention relates to a kind of switch operating mechanisms, combined floodgate intermediate relay normally opened contact is equipped with by rotating forward string in controlling brancher, it inverts string in controlling brancher and is equipped with separating brake intermediate relay normally opened contact, after guaranteeing that combined floodgate or separating brake relay normally closed contact disconnect in braking resistor branch, reclose the normally opened contact for rotating forward controlling brancher or inverting the combined floodgate intermediate relay normally opened contact or separating brake intermediate relay in controlling brancher, it is ensured that braking resistor branch effectively disconnects when switch combined floodgate or separating brake.The operating mechanism changes the opportunity of braking resistor access motor branch, destroy the condition that power positive cathode is connected through braking resistor, the hidden danger for generating electric arc when relay normally closed contact disconnects in braking resistor branch when cancel switch combined floodgate/separating brake, burning relay, realizes the quick start and stopping of switch operating mechanism motor.
Description
Technical field
The invention belongs to GIS substation technical fields, and in particular to a kind of switch operating mechanism.
Background technique
Three-station isolating grounding switch has both disconnecting switch and two kinds of functions of earthing switch, is widely used to GIS (metal
Sealing switch equipment).Currently, three-station isolating grounding switch control loop is more complicated, relay touching is controlled in control loop
Point can generate electric arc in open or closed moment, and this electric arc will lead to the braking resistor in control loop and be shorted to electricity
Between the positive and negative anodes of source, form biggish electric current in the loop, cause control relay contact can not cut-off, finally burn control after
Appliance contact causes control loop failure, affects the global reliability of three-station isolating grounding switch.
In the prior art, a kind of typical three-station isolating grounding switch operating mechanism as shown in Figure 1, including disconnecting switch
Control loop, earthing switch control loop and electric motor loop.Disconnecting switch control loop includes: that the control of disconnecting switch divide-shut brake is opened
Close CS-DS@1, disconnecting switch control module DS@1X and microswitch Ldb, Lda, wherein 1 contact 1-2 of CS-DS@, normally closed touching
Point Y1b4, combined floodgate auxiliary relay X2, microswitch Ldb are sequentially connected in series positive pole PC and the both ends power cathode NC, close a floodgate
Auxiliary relay X2 is parallel with combined floodgate main relay X1, and the hot end of combined floodgate auxiliary relay X2 is connected by normally opened contact X1a4
Meet power supply PC；Correspondingly, 1 contact 3-4 of CS-DS@, normally-closed contact X1b4, separating brake auxiliary relay Y2, microswitch Lda are successively
It is connected in series to positive pole PC and the both ends power cathode NC, separating brake auxiliary relay Y2 is parallel with separating brake main relay Y1, and separating brake is auxiliary
The hot end of relay Y2 is helped to pass through normally opened contact Y1a4 connection power supply PC.Earthing switch control loop includes: ground connection division
Lock switch CS-ES@1, earthing switch control module ES@1X and microswitch Leb, Lea, the ground connection control loop structure with every
It is identical to leave pass.
Electric motor loop is as shown in Figure 1, its control principle are as follows:
Disconnecting switch divide-shut brake control switch CS-DS@1 is threaded to closing position, contact 1-2 is connected, disconnecting switch control
The combined floodgate main relay X1 of molding block DS@1X obtains electric, normally opened contact X1a1, X1a2, X1a3, X1a4 closure, normally-closed contact
X1b1, X1b2 are opened, along 1. -2. -3. -4. -5. -6. -7.-branch (being denoted as branch 1) conducting 8., electromagnet in electric motor loop
CCD obtains electric, the microswitch CCD1 that is controlled by it closure, along 1. -2. -3. -9. -10. -5. -6. -7.-branch 8. in electric motor loop
Road (be denoted as branch 2, including rotate forward controlling brancher 1. -2. -3., 9. -10. -5. -6. -7. -8. with motor branch 3. -9.) conducting,
Motor M obtains electric Positive work, and disconnecting switch executes combined floodgate.After in-place closing, microswitch Ldb is disconnected, and disconnecting switch controls mould
The combined floodgate main relay X1 power loss of block DS@1X, normally opened contact X1a1, X1a2, X1a3 restore to opening state, and branch 1 disconnects,
Motor M power loss, CCD power loss, normally-closed contact X1b1 closure, circuit(wherein For braking resistor branch) connect, braking resistor RM be connected in parallel to motor both ends carry out dynamic braking until
Motor stops, and disconnecting switch combined floodgate terminates.
In in-place closing, i.e., the T2 period as shown in Figure 2, combined floodgate main relay X1 power loss, normally opened contact X1a1,
During X1a2, X1a3 are opened and normally-closed contact X1b1 is closed, electric arc generation is had between two electrodes of contact, if above-mentioned
Electric arc cannot be extinguished in the shortest possible time, because the presence of electric arc, combined floodgate main relay X1's is normal within the T2 period
It opens contact and normally-closed contact is in the conductive state simultaneously, form edge in Fig. 1 electric motor loop (i.e. rotating forward controlling brancher and the series connection of braking resistor branch)
Branch, only RM mono- load in this branch, resistance value only has 1~2 ohm, and the small bus of electric motor loop power supply is specified
Voltage is DC110V~DC220V, and the electric current in this branch in this way can at least reach 50 amperes, it is short to be equivalent to power positive cathode
The ability to bear that road, so big electric current have had exceeded the normally opened contact and normally-closed contact of combined floodgate main relay X1, cause after
Appliance contact is burnt, and ultimately causes entire control loop failure.
In disconnecting switch separating brake, same problem will cause: disconnecting switch divide-shut brake control switch CS-DS 1 is threaded to
Open position, contact 3-4 are connected, and the separating brake main relay Y1 of disconnecting switch control module DS@1X obtains electric, normally opened contact
Y1a1, Y1a2, Y1a3, Y1a4 closure, normally-closed contact Y1b1, Y1b2 are opened, edge in electric motor loop Branch conducting, electromagnet CCD obtains electric, the microswitch CCD1 that is controlled by it closure, electric motor loop
Middle edgeBranch (be denoted as branch 4, including reversion controlling brancher 1. -2. -6. -
⑤-⑩-⑨、With motor branch 9. -3.) conducting, motor M obtains electric antiport.Separating brake in place after, microswitch
Lda is disconnected, and the separating brake main relay Y1 power loss of disconnecting switch control module DS@1X, normally opened contact Y1a1, Y1a2, Y1a3 are extensive
Multiple to opening state, branch 3 is disconnected, motor M power loss, CCD power loss, normally-closed contact Y1b1 closure, circuit(i.e. braking resistor branch is connected with motor branch) connects, and braking resistor RM is connected in parallel to electricity
Machine both ends carry out dynamic braking until motor stops, and the movement of disconnecting switch separating brake terminates.
Separating brake in place when, i.e., the T4 period as shown in Figure 3, separating brake main relay Y1 power loss, normally opened contact Y1a1,
During Y1a2, Y1a3 are opened and normally-closed contact Y1b1 is closed, electric arc generation is had between two electrodes of contact, if above-mentioned
Contact cannot extinguish electric arc in the shortest possible time, because of the presence of electric arc in the T4 period, separating brake main relay Y1's
Normally opened contact and normally-closed contact are in the conductive state simultaneously, form edge in Fig. 1 electric motor loop The branch of (i.e. braking resistor branch and reversion controlling brancher), this
Only has RM mono- load in a branch, resistance value only has 1~2 ohm, and the voltage rating of the small bus of electric motor loop power supply is
DC110V~DC220V, the in this way electric current in this branch can at least reach 50 amperes, be equivalent to power positive cathode short circuit, so
Big electric current has exceeded the normally opened contact of separating brake main relay Y1 and the ability to bear of normally-closed contact, and relay contact is caused to burn
It ruins, ultimately causes entire control loop failure.
Currently, foreign same type product is by using modes solutions such as high power relay, the operation precisions for improving relay
Certainly problems, but above-mentioned potential faults are still remained from control principle, i.e., when switch closes a floodgate, close a floodgate in shutting-brake control loop
Relay normally open contact (when switch part lock, separating brake relay normally open contact in separating brake control loop) is closed, and brakes electricity
It hinders closing relay normally-closed contact (separating brake relay normally closed contact) in branch and disconnects moment generation electric arc, be shorted braking resistor
To between power positive cathode, formation high current finally burns out the hidden danger of relay contact；When switching in-place closing, shutting-brake control is returned
Closing relay normally opened contact (when switching separating brake in place, separating brake relay normally open touches shop in separating brake control loop) disconnects wink in road
Between generate electric arc, and combined floodgate/separating brake relay normally closed contact is closed in braking resistor branch at this time, is shorted braking resistor
To between power positive cathode, formation high current burns out the hidden danger of relay contact.
Summary of the invention
The object of the present invention is to provide a kind of switch operating mechanism, braking resistor branch when for solving switch combined floodgate/separating brake
It leads to the problem of electric arc when relay normally closed contact disconnects in road, burn relay.
In order to solve the above technical problems, the present invention proposes a kind of switch operating mechanism, including closing relay and separating brake after
Electric appliance further includes motor branch, braking resistor branch, rotates forward controlling brancher and reversion controlling brancher, the motor branch and system
Dynamic resistance branch is in parallel；The rotating forward controlling brancher and motor branch shutting-brake control loop in series；The reversion control branch
Road and motor branch separating brake control loop in series；
String is equipped with combined floodgate intermediate relay normally opened contact in the rotating forward controlling brancher；The control of the combined floodgate intermediate relay
It include concatenated combined floodgate intermediate relay coil and closing relay normally opened contact in circuit processed；
String is equipped with separating brake intermediate relay normally opened contact in the reversion controlling brancher；The control of the separating brake intermediate relay
It include concatenated separating brake intermediate relay coil and separating brake relay normally open contact in circuit processed.
Further, the closing relay normally opened contact includes the ground connection of disconnecting switch combined floodgate normally opened contact and its parallel connection
Switch combined floodgate normally opened contact；The separating brake relay normally open contact includes disconnecting switch separating brake relay normally open contact and its parallel connection
Grounding switch tripping relay normally open contact.
Further, the braking resistor branch is additionally provided with the normally-closed contact of protective relay, the protective relay
Control loop includes concatenated protective relay coil and combined floodgate intermediate relay normally opened contact, the normally opened touching of combined floodgate intermediate relay
Point is parallel with separating brake intermediate relay normally opened contact.
The beneficial effects of the present invention are: being equipped with combined floodgate intermediate relay (MC) normally opened touching by rotating forward string in controlling brancher
Point, invert controlling brancher in string be equipped with separating brake intermediate relay (MT) normally opened contact, guarantee braking resistor branch in close a floodgate or point
After lock relay normally closed contact disconnects, it is normally opened to reclose the combined floodgate intermediate relay for rotating forward controlling brancher or inverting in controlling brancher
The normally opened contact of contact or separating brake intermediate relay, it is ensured that braking resistor branch effectively disconnects when switch combined floodgate or separating brake.The behaviour
Make on the opportunity that mechanism changes braking resistor access motor branch, to destroy the condition that power positive cathode is connected through braking resistor, release
The hidden danger for generating electric arc when relay normally closed contact disconnects in braking resistor branch when switching combined floodgate/separating brake, burning relay, it is real
The quick start and stopping of existing switch operating mechanism motor.
Detailed description of the invention
Fig. 1 is the schematic illustration of prior art three-station isolating grounding switch operating mechanism；
Fig. 2 is electric motor loop contact action timing diagram when prior art switch operating mechanism closes a floodgate；
Electric motor loop contact action timing diagram when Fig. 3 is prior art switch operating mechanism separating brake；
Fig. 4 is a kind of schematic illustration of switch operating mechanism of the present invention；
Fig. 5 is electric motor loop contact action timing diagram when switch operating mechanism of the present invention closes a floodgate；
Fig. 6 is basic schematic diagram of the invention.
Specific embodiment
A specific embodiment of the invention is further described with reference to the accompanying drawing.
A kind of embodiment of switch operating mechanism of the invention:
Core of the invention thought increases intermediate relay MC and MT as shown in fig. 6, on the basis of original circuit
(relay MC and MT are shown in Fig. 4), intermediate relay MC and MT is by division, the control of lock relay, by intermediate relay MC and MT
Normally opened contact seals in control loop.
Specifically, switch operating mechanism of the invention includes: closing relay and separating brake relay, it further include motor branch
Road, braking resistor branch rotate forward controlling brancher and reversion controlling brancher, rotate forward string in controlling brancher and are equipped with combined floodgate intermediate relay
MC normally opened contact inverts string in controlling brancher and is equipped with separating brake intermediate relay MT normally opened contact.(braking resistor branch as shown in Figure 6
String has set the normally-closed contact of switching on and off relay in road, is not drawn into Fig. 6, may refer to Fig. 4), rotating forward controlling brancher includes electricity
The branch and combined floodgate intermediate relay MC normally opened contact MC2 of source anode PM to combined floodgate intermediate relay MC normally opened contact MC1 to electricity
The branch of source cathode NM.Inverting controlling brancher includes branch of the positive pole PM to separating brake intermediate relay MT normally opened contact MT1,
With the branch of separating brake intermediate relay MT normally opened contact MT2 to power cathode NM.
As shown in fig. 6, motor branch and braking resistor branch circuit parallel connection, rotate forward controlling brancher and the conjunction in series of motor branch
Lock control loop, reversion controlling brancher and motor branch separating brake control loop in series.The control of combined floodgate intermediate relay is returned
It include concatenated combined floodgate intermediate relay coil and closing relay normally opened contact in road (Fig. 6 is not drawn into, as shown in Figure 4).Point
It include concatenated separating brake intermediate relay coil and separating brake relay normally open contact in the control loop of lock intermediate relay (as schemed
Shown in 4).
When combined floodgate, in the case that only closing relay normally-closed contact is already off in braking resistor branch, above-mentioned conjunction
Intermediate relay normally opened contact MC1, MC2 of lock control loop can be just closed, thereby it is ensured that braking resistor branch when switch closes a floodgate
Effective disconnection；It is above-mentioned in the case that only separating brake relay normally closed contact is already off in braking resistor branch when separating brake
Intermediate relay normally opened contact MT1, MT2 of separating brake control loop can be just closed, it is ensured that braking resistor branch when switch separating brake
Effectively disconnect.I.e. combined floodgate/separating brake when, only when combined floodgate/separating brake actuating of relay finishes, intermediate relay can just be acted, connect
Combined floodgate/separating brake control loop simultaneously disconnects braking resistor branch, realizes the quick start of switch operating mechanism motor, and cancel switch closes
The hidden danger for generating electric arc when relay normally closed contact disconnects in braking resistor branch when lock/separating brake, burning relay.
It is of the invention in order to make switch operating mechanism of the invention while have the function of disconnecting switch and two kinds of earthing switch
Switch operating mechanism is respectively equipped with the closing relay and separating brake relay of control disconnecting switch, and the combined floodgate of control earthing switch
Relay and separating brake relay.Correspondingly, the closing relay normally opened contact in the control loop of combined floodgate intermediate relay, also sets
There is the earthing switch combined floodgate normally opened contact of disconnecting switch combined floodgate normally opened contact and its parallel connection；The control loop of separating brake intermediate relay
Separating brake relay normally open contact, be additionally provided with disconnecting switch separating brake relay normally open contact and its parallel connection grounding switch tripping after
Electric appliance normally opened contact.
In order to ensure braking resistor combined floodgate/separating brake in place when reliably disconnect, braking resistor branch is additionally provided with protection relay
The normally-closed contact of device, the control loop of protective relay include that concatenated protective relay coil and combined floodgate intermediate relay are normally opened
Contact, combined floodgate intermediate relay normally opened contact are parallel with separating brake intermediate relay normally opened contact, it is ensured that combined floodgate/separating brake relay is normal
It opens after contact disconnects and accesses braking resistor branch, when avoiding switch in-place closing, closing relay is normal in shutting-brake control loop
It opens contact (switch separating brake in place when, separating brake relay normally open touches shop in separating brake control loop) and disconnects moment and generate electric arc, and this
When braking resistor branch in combined floodgate/separating brake relay normally closed contact it is closed, be shorted to braking resistor between power positive cathode,
It forms high current and burns out relay contact bring hidden danger, realize the fast braking of switch operating mechanism motor.
A specific embodiment is given below, the present embodiment is by taking tri-station isolating switch as an example.
It is illustrated in figure 4 three-station isolating grounding switch operating mechanism provided by the present invention, including disconnecting switch control
Circuit, earthing switch control loop and electric motor loop.Wherein, electric motor loop includes motor branch, braking resistor branch, rotates forward control
Branch processed and reversion controlling brancher；Motor branch includes motor M；Braking resistor branch includes the braking resistor RM being sequentially connected in series,
Closing relay normally-closed contact CX1b1, CX2b1, separating brake relay normally closed contact TX1b1, TX2b1, the normally closed touching of protective relay
Point RXb1, RXb2；Rotating forward controlling brancher includes the branch where branch and MCa3 where MCa1, MCa2；Invert controlling brancher
Including the branch where the branch and MTa3 where MTa1, MTa2.Disconnecting switch control loop includes: disconnecting switch divide-shut brake control
Switch CS-DS@1, disconnecting switch control module and microswitch are made, wherein disconnecting switch control module is equipped with closing relay
CX1 and separating brake relay TX1.Earthing switch control loop includes: ground connection on-off switch CS-ES@1, earthing switch control mould
Block and microswitch, the ground connection control loop structure is identical as disconnecting switch, and wherein earthing switch control module includes being equipped with to close
Lock relay CX2 and separating brake relay TX2.Electric motor loop is opened according to disconnecting switch divide-shut brake control switch CS-DS@1 and ground connection
It closes the operational order that divide-shut brake control switch CS-ES@1 receives and completes the order of operating mechanism divide-shut brake.
In Fig. 4, after three-station isolating grounding switch CS-DS@1 receives switching signal, disconnecting switch closing relay
CX1 coil obtains electric, normally opened contact CX1a1 closure, powers on positive PC, formation self-holding circuit；Normally-closed contact CX1b1 is disconnected
It opens, the circuit where braking resistor RM is disconnected；Normally opened contact CX1a2 closure, combined floodgate intermediate relay MC coil obtain it is electric, in turn
Normally opened contact MCa1~MCa3 of combined floodgate intermediate relay MC is closed, and motor rotates forward circuit connection, and motor rotates forward, band
Pneumatic operating mechanism closes a floodgate, and realizes the quick start of motor, avoids braking resistor RM by circuit MCa1-MCa2-RM-
TX2b1-TX1b1-CX2b1-CX1b1-RXb1-RXb2-MCa3 connection positive pole PM, cathode NM burn out the high current flowed through
Relay contact.
As can be seen from Figure 5, it is normally closed to can be seen that CX1 when disconnecting switch is closed a floodgate in electric motor loop in each contact action timing diagram
There are time difference t1 for contact opening and the connection (identical as MT normally opened contact timing) of MC normally opened contact, so that when motor is connected,
Braking resistor RM is disconnected from electric power loop, it is ensured that is reliably disconnected in the moment brake circuit that motor is connected.
In addition, the coil tandem of the normally opened contact MCa4 and protective relay RX of combined floodgate intermediate relay MC, makes to be connected on
Normally-closed contact RXb1 and RXb2 in resistive braking circuit are disconnected.After in-place closing, microswitch Ldb is disconnected, and is kept apart and is closed
Lock relay CX1 is disconnected, and normally opened contact CX1a2 is disconnected；And then intermediate relay M C coil losing electricity, contact MCa1~
MCa4 is disconnected, and makes motor M and protective relay RX successively power loss.The contact of only closing relay MC disconnects, protective relay
RX just understands power loss, and contact R Xb1 and RXb2 can be just closed, due to the presence of protective relay RX time of return, closing relay
Normally opened contact MCa1~MCa3 of MC disconnect with the normally-closed contact of protective relay RX closure have regular hour difference t4 this
Time difference ensure that positive pole and cathode will not be in the moments that motor powers off through MCa1-MCa2-RM-TX2b1-TX1b1-
The circuit of CX2b1-CX1b1-RXb1-RXb2-MCa3 is connected, and the generation of high current is avoided, after contact R Xb1 and RXb2 are closed,
The circuit of braking resistor and motor M composition consumes the kinetic energy of motor, to achieve the purpose that motor fast braking.Braking process
Terminate, entire electric motor loop restores the state to closing operation at this time, has the condition for carrying out next operation again.
Disconnecting switch separating brake, the control method point that earthing switch closes a floodgate, grounding switch tripping closes a floodgate with above-mentioned disconnecting switch
Analysis thinking is identical, and details are not described herein.
Using the three-station isolating grounding switch operating mechanism motor quick start of the invention constituted, braking circuit, utilize
The cascade actuation time difference feature of relay changes the opportunity of braking resistor access electric motor loop, destroys power positive cathode
The condition connected through braking resistor, realizes three-station isolating grounding switch operating mechanism driving motor and reliably controls, eliminate
When three-station isolating grounding switch operating mechanism acts, the potential faults that power positive cathode is connected through braking resistor solve electricity
It leads to the problem of electric arc when relay contact disconnects in machine circuit, burn relay.
In above-described embodiment by taking three-station as an example, wherein disconnecting switch part and earthing switch part are mutually indepedent
, it is, therefore, apparent that can also apply in the disconnecting switch without earthing switch, in even other switchgears.
Claims (3)
1. a kind of switch operating mechanism, including closing relay and separating brake relay further include motor branch, braking resistor branch
Road rotates forward controlling brancher and reversion controlling brancher, the motor branch and braking resistor branch circuit parallel connection；The rotating forward controlling brancher
With motor branch shutting-brake control loop in series；The reversion controlling brancher and motor branch separating brake in series control back
Road；It is characterized in that,
String is equipped with combined floodgate intermediate relay normally opened contact in the rotating forward controlling brancher；The control of the combined floodgate intermediate relay is returned
It include concatenated combined floodgate intermediate relay coil and closing relay normally opened contact in road；
String is equipped with separating brake intermediate relay normally opened contact in the reversion controlling brancher；The control of the separating brake intermediate relay is returned
It include concatenated separating brake intermediate relay coil and separating brake relay normally open contact in road.
2. switch operating mechanism according to claim 1, which is characterized in that the closing relay normally opened contact include every
Leave the earthing switch combined floodgate normally opened contact for closing lock normally opened contact and its parallel connection；The separating brake relay normally open contact include every
Leave the grounding switch tripping relay normally open contact for closing separating brake relay normally open contact and its parallel connection.
3. switch operating mechanism according to claim 1, which is characterized in that the braking resistor branch be additionally provided with protection after
The normally-closed contact of electric appliance, the control loop of the protective relay include concatenated protective relay coil and intermediate relay of closing a floodgate
Device normally opened contact, combined floodgate intermediate relay normally opened contact are parallel with separating brake intermediate relay normally opened contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710414840.6A CN108987136B (en) | 2017-06-05 | 2017-06-05 | A kind of switch operating mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710414840.6A CN108987136B (en) | 2017-06-05 | 2017-06-05 | A kind of switch operating mechanism |
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| Publication Number | Publication Date |
|---|---|
| CN108987136A true CN108987136A (en) | 2018-12-11 |
| CN108987136B CN108987136B (en) | 2019-10-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710414840.6A Active CN108987136B (en) | 2017-06-05 | 2017-06-05 | A kind of switch operating mechanism |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110277271A (en) * | 2019-06-28 | 2019-09-24 | 国网河南省电力公司经济技术研究院 | A kind of intelligent substation tri-station isolating switch and its control loop |
| CN112039030A (en) * | 2020-09-18 | 2020-12-04 | 广东电网有限责任公司 | Protection circuit and protection method of three-station isolation knife |
| CN113517755A (en) * | 2020-04-09 | 2021-10-19 | 河南平芝高压开关有限公司 | Switch device and control circuit thereof |
| CN113745038A (en) * | 2021-08-31 | 2021-12-03 | 国网河北省电力有限公司检修分公司 | Isolating switch |
| CN113936950A (en) * | 2021-10-28 | 2022-01-14 | 广东电网有限责任公司 | Method, device and system for determining state of three-station mechanism |
| CN114023576A (en) * | 2021-10-29 | 2022-02-08 | 平高集团有限公司 | Three-position switch operating mechanism |
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|---|---|---|---|---|
| CN110277271A (en) * | 2019-06-28 | 2019-09-24 | 国网河南省电力公司经济技术研究院 | A kind of intelligent substation tri-station isolating switch and its control loop |
| CN110277271B (en) * | 2019-06-28 | 2021-03-23 | 国网河南省电力公司经济技术研究院 | Three-station isolating switch of intelligent substation and control loop thereof |
| CN113517755A (en) * | 2020-04-09 | 2021-10-19 | 河南平芝高压开关有限公司 | Switch device and control circuit thereof |
| CN112039030A (en) * | 2020-09-18 | 2020-12-04 | 广东电网有限责任公司 | Protection circuit and protection method of three-station isolation knife |
| CN112039030B (en) * | 2020-09-18 | 2023-04-25 | 广东电网有限责任公司 | Protection loop and protection method for three-station isolation knife |
| CN113745038A (en) * | 2021-08-31 | 2021-12-03 | 国网河北省电力有限公司检修分公司 | Isolating switch |
| CN113745038B (en) * | 2021-08-31 | 2023-07-25 | 国网河北省电力有限公司检修分公司 | Isolation switch |
| CN113936950A (en) * | 2021-10-28 | 2022-01-14 | 广东电网有限责任公司 | Method, device and system for determining state of three-station mechanism |
| CN114023576A (en) * | 2021-10-29 | 2022-02-08 | 平高集团有限公司 | Three-position switch operating mechanism |
| CN114023576B (en) * | 2021-10-29 | 2023-03-07 | 平高集团有限公司 | Three-position switch operating mechanism |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108987136B (en) | 2019-10-11 |
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