CN205920338U - Double -bus control circuit's interlocking control circuit - Google Patents
Double -bus control circuit's interlocking control circuit Download PDFInfo
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- CN205920338U CN205920338U CN201620730754.7U CN201620730754U CN205920338U CN 205920338 U CN205920338 U CN 205920338U CN 201620730754 U CN201620730754 U CN 201620730754U CN 205920338 U CN205920338 U CN 205920338U
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Abstract
The utility model relates to a double -bus control circuit, include: the close a floodgate little generating line GBM of little generating line HM, isolator shutting, first interlocking control circuit, second interlocking control circuit and third interlocking control circuit, wherein, three interlocking control circuit is arranged in controlling the double -bus control circuit time sequential routine of the time sequential routine of isolator and circuit breaker in the return circuit, female time sequential routine that allies oneself with return circuit and the return circuit of being qualified for the next round of competitions and female isolator who allies oneself with in the return circuit and circuit breaker of being qualified for the next round of competitions respectively, and all includes the electromagnetic lock among the three interlocking control circuit, sets up lockpin and handle on the electromagnetic lock, and the lockpin prevents isolator pivot rotation in inserting the hole of axis base of corresponding isolator's operation pivot, lockpin and handle linkage, the people can remove the restriction of lockpin to operating the pivot for pulling the handle, thereby and then makes the switch -on of corresponding interlock circuit control the sequential operation to isolator among the double -bus control circuit and circuit breaker.
Description
Technical Field
The utility model relates to a control circuit, concretely relates to double bus control circuit's interlock control circuit.
Background
In an electric loop configured with a disconnecting switch and a circuit breaker, the disconnecting switch is mainly used for disconnecting a circuit without load current and an isolation power supply so as to ensure the safety of other electrical equipment; circuit breakers are used to operate on load currents and also fault currents. And the disconnecting switch can only be operated under the condition that the circuit breaker is disconnected, otherwise serious equipment or personal accidents can be caused, and therefore, a locking device is required to be arranged for the operation of the circuit breaker and the disconnecting switch in the electric loop, namely, the locking device is used for controlling the operation time sequence of the circuit breaker and the disconnecting switch in the electric loop. However, the conventional locking device adopts an electric locking mode to control the operation sequence of the circuit breaker and the disconnecting switch in the electric circuit, and in the mode, an interlocking circuit in the locking device is complex and has a large number of parts, so that faults are easy to occur, and the interlocking is not reliable.
In the existing double-bus control circuit, because each branch circuit is additionally provided with two groups of isolating switches compared with a single-bus control circuit, the interlocking circuit for controlling the double-bus control circuit becomes more complex, and when the double-bus control circuit carries out switching operation, the action of the circuit breaker and the isolating switches in the bus-coupled loop and the action of the circuit breaker and the isolating switches in the outgoing line loop have sequential matching relation, so that the interlocking control circuit is more complex, therefore, if the traditional locking mode is used, the fault occurrence rate of the interlocking control circuit is higher, the operation sequence of the isolating switches and the circuit breakers is more difficult to ensure, and even the misoperation of the isolating switches with load on and off can be caused.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problem, the utility model provides a double bus control circuit's interlock control circuit, include: a closing small bus HM, a disconnecting switch locking small bus GBM, a first interlocking control circuit, a second interlocking control circuit and a third interlocking control circuit, wherein,
one end of the first interlocking control circuit is connected with the positive power supply + HM of the switching-on small bus, and the other end of the first interlocking control circuit is connected with the negative power supply-HM of the switching-on small bus, and the first interlocking control circuit is used for controlling the time sequence of the operation of an isolating switch and a circuit breaker in an outgoing line loop in the double-bus control circuit;
one end of the second interlocking control circuit is connected with the blocking small bus GBM of the isolating switch, and the other end of the second interlocking control circuit is connected with the negative power supply-HM of the closing small bus and is used for controlling the time sequence of the operation of a bus-coupled loop and an outgoing line loop in the double-bus control circuit;
one end of the third interlocking control circuit is connected with the positive power supply + HM of the small closing bus, and the other end of the third interlocking control circuit is connected with the negative power supply-HM of the small closing bus and is used for controlling the time sequence of the operation of the disconnecting switch and the circuit breaker in the bus-coupled loop in the double-bus control circuit;
the first interlocking control circuit, the second interlocking control circuit and the third interlocking control circuit comprise electromagnetic locks;
the electromagnetic lock is provided with a lock pin and a handle connected with the lock pin, and the lock pin can be inserted into a shaft seat hole of a rotating shaft of the isolating switch at a corresponding position and used for controlling the rotation of the rotating shaft;
the handle is a manual handle and is used for controlling the lock pin to be inserted into a shaft seat hole of a rotating shaft of the isolating switch at a corresponding position or controlling the lock pin to be pulled out of the shaft seat hole.
Optionally, the first interlock control circuit comprises: a first fuse, a first electromagnetic lock, a second fuse, and a second electromagnetic lock, wherein,
the first end of the first fuse is connected with a positive power supply + HM of a closing small bus, the second end of the first fuse is connected with the first end of the first electromagnetic lock, the second end of the first electromagnetic lock is connected with a normally closed auxiliary contact of a second isolating switch in an outgoing line loop, the normally closed auxiliary contact of the second isolating switch is further connected with the normally closed auxiliary contact of a first circuit breaker in the outgoing line loop, the normally closed auxiliary contact of the first circuit breaker is connected with the first end of the second fuse, the second end of the second fuse is connected with a negative power supply-HM of the closing small bus, the first end of the second electromagnetic lock is connected with the first fuse and a public end of the first electromagnetic lock, the second end of the second electromagnetic lock is connected with the normally closed auxiliary contact of the first isolating switch in the outgoing line loop, and the normally closed auxiliary contact of the first isolating switch is further connected with the normally closed auxiliary contact of the second isolating switch in the outgoing line loop and the outgoing line loop And the common end of the normally closed auxiliary contact of the first breaker in the circuit is connected.
Optionally, the second interlock control circuit includes a fourth fuse, wherein,
the first end of the fourth fuse is connected with the negative power-HM of the closing small bus, the second end of the fourth fuse is connected with the normally open auxiliary contact of the second circuit breaker in the bus-coupled loop, the normally open auxiliary contact of the second circuit breaker is connected with the normally open auxiliary contact of the fourth isolating switch in the bus-coupled loop, the normally open auxiliary contact of the fourth isolating switch is further connected with the normally open auxiliary contact of the third isolating switch in the bus-coupled loop, the normally open auxiliary contact of the third isolating switch is further connected with the GBM of the isolating switch locking small bus, the GBM of the isolating switch locking small bus is further connected with the common end of the normally open auxiliary contact of the second isolating switch and the normally open auxiliary contact of the first isolating switch, and the normally open auxiliary contact of the second isolating switch is further connected with the common end of the normally closed auxiliary contact of the first electromagnetic lock and the second isolating switch, and the normally open auxiliary contact of the first isolating switch is also connected with the common ends of the second electromagnetic lock and the normally closed auxiliary contact of the first isolating switch.
Optionally, the third interlocking control circuit comprises a third fuse, a fourth fuse, a third electromagnetic lock and a fourth electromagnetic lock, wherein,
the first end of third fuse with combined floodgate little generating line positive power supply + HM is connected, the second end of third fuse with the first end of third electromagnetic lock is connected, the second end of third electromagnetic lock with the auxiliary normally closed contact of female antithetical couplet return circuit second circuit breaker is connected, the auxiliary normally closed contact of second circuit breaker still with the fourth fuse is connected, the fourth fuse other end with combined floodgate little generating line negative power supply-HM is connected, the first end of fourth electromagnetic lock with the third fuse with the common port of third electromagnetic lock is connected, the second end of fourth electromagnetic lock with the third electromagnetic lock with the common port of the auxiliary normally closed contact of second circuit breaker is connected.
Has the advantages that:
the interlocking control circuit of the double-bus control circuit is provided with three interlocking control circuits for controlling the operation time sequence of a disconnecting switch and a circuit breaker in the double-bus control circuit, wherein electromagnetic locks are respectively provided with a lock pin and a handle, the lock pin can be inserted into a rotating shaft base hole of the disconnecting switch in the double-bus control circuit at a corresponding position for controlling the rotating shaft to rotate, the lock pin controlled by the electromagnetic locks is released after the electromagnetic locks are switched on and powered, the control of the lock pin on the rotating shaft of the disconnecting switch can be released by manually opening the lock pin of the electromagnetic locks by manually operating the handles, the corresponding disconnecting switch can be operated, the corresponding interlocking circuit is switched on, the operation time sequence of the disconnecting switch and the circuit breaker of the double-bus control circuit is finally controlled, and the handle is released after the operation is finished, the lock pin automatically resets and is kept at a locking position.
It can be seen, the embodiment of the utility model provides a double bus control circuit's interlock control circuit, only need a small amount of electromagnetic lock component just can realize interlock circuit's switch-on or disconnection, and then the isolator among the control double bus control circuit and the operation chronogenesis of circuit breaker, and pure electric shutting needs the special control circuit of design control interlock circuit to open or close, consequently, compare with pure electric shutting mode, synthesize the mode of electronic shutting and mechanical shutting and reduced the control circuit who is exclusively used in control interlock circuit switch-on or disconnection, interlock control circuit's structure has been simplified. And because the interlock control circuit can only open the lock pin to realize the control of the rotating shaft of the isolating switch by operating the handle thereof to open the lock pin after the electromagnetic lock is switched on to receive power, namely when the circuit breaker is in a closed state and the normally closed contact thereof is switched off, if the electromagnetic lock is not switched on, the isolating switch cannot be operated, thereby preventing the misoperation of switching on and off the isolating switch with load and further improving the reliability of interlocking.
Drawings
Fig. 1 is a schematic structural diagram of a dual bus control circuit diagram.
Fig. 2 is a schematic structural diagram of an interlock control circuit diagram provided by the present invention.
Fig. 3 is a schematic structural diagram of an interlock control circuit of a dual bus control circuit according to an embodiment of the present invention.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a schematic diagram of a partial structure of a dual-bus control circuit, which includes a bus IM, a bus IIM, an outgoing line loop, and a bus coupler loop. The outgoing line loop comprises a first disconnecting switch 1DS, a second disconnecting switch 2DS and a first circuit breaker 1CB, specifically, a first end of the first disconnecting switch 1DS is connected with a bus IM, a first end of the second disconnecting switch 2DS is connected with a bus IIM, a second end of the first disconnecting switch 1DS is connected with a second end of the second disconnecting switch 2DS, and the first circuit breaker 1CB is connected with a common end of the first disconnecting switch 1DS and the second disconnecting switch 2 DS; the bus tie loop comprises a third isolating switch 3DS, a fourth isolating switch 4DS and a second circuit breaker 2CB, specifically, a first end of the third isolating switch 3DS is connected with a bus IM, a second end of the third isolating switch 3DS is connected with a first end of the second circuit breaker 2CB, a second end of the second circuit breaker 2CB is connected with a first end of the fourth isolating switch 4DS, and a second end of the fourth isolating switch 4DS is connected with a bus IIM.
Fig. 2 is a schematic structural diagram of an interlock control circuit of a double-bus control circuit, which includes a closing small bus HM, a blocking small bus GBM of an isolating switch, a first interlock control circuit, a second interlock control circuit, and a third interlock control circuit.
One end of the first interlocking control circuit is connected with a positive power supply + HM of the switching-on small bus, and the other end of the first interlocking control circuit is connected with a negative power supply-HM of the switching-on small bus and is used for controlling the operation time sequence of the disconnecting switch and the circuit breaker in the outgoing line loop in the double-bus control circuit.
One end of the second interlocking control circuit is connected with the small isolating switch blocking bus GBM, the other end of the second interlocking control circuit is connected with the negative power supply-HM of the small closing bus and is used for controlling the operation time sequence of a bus-coupled loop and an outgoing line loop in the double-bus control circuit, and the isolating switch in the outgoing line loop, the isolating switch in the bus-coupled loop and an auxiliary contact of the circuit breaker in the double-bus control circuit are connected to the second interlocking control circuit, so that the second interlocking control circuit can control the operation time sequence of the outgoing line loop, the isolating switch in the bus-coupled loop and the circuit breaker.
One end of a third interlocking control circuit is connected with a positive power supply + HM of the small closing bus, and the other end of the third interlocking control circuit is connected with a negative power supply-HM of the small closing bus, and the third interlocking control circuit is used for controlling the operation time sequence of an isolating switch and a circuit breaker in a bus-coupled loop in the double-bus control circuit, and the isolating switch and an auxiliary contact of the circuit breaker in the bus-coupled loop in the double-bus control circuit are connected to the third interlocking control circuit, so that the third interlocking control circuit can control the operation time sequence of the isolating switch and the circuit breaker in the bus-coupled loop.
The first interlocking control circuit, the second interlocking control circuit and the third interlocking control circuit respectively comprise an electromagnetic lock, the electromagnetic lock is provided with a lock pin and a handle connected with the lock pin, the lock pin can be inserted into a shaft seat hole of a rotating shaft of the isolating switch at a preset corresponding position (for example, if the first electromagnetic lock is set to control the first isolating switch, the first electromagnetic lock is arranged near a shaft seat at the rear end of the rotating shaft of the first isolating switch, the lock pin is inserted into the shaft seat hole of the rotating shaft of the first isolating switch), and the handle is a manual handle and used for controlling the lock pin to be inserted into the shaft seat hole of the rotating shaft of the isolating switch at the corresponding position or controlling the lock pin to be pulled out of the shaft seat hole so as to control the rotating shaft of the isolating switch.
Fig. 3 is a schematic structural diagram of the interlock control circuit provided in the embodiment of the present invention, which includes a closing small bus HM, a blocking small bus GBM of the disconnecting switch, a first interlock control circuit, a second interlock control circuit, and a third interlock control circuit. Wherein,
the first interlock control circuit may include: first fuse 1FU, first electromagnetic lock 1YL, second fuse 2FU and second electromagnetic lock 2 YL. Wherein, the first end of the first fuse 1FU is connected with the positive power + HM of the switching-on small bus, the second end of the first fuse 1FU is connected with the first end of the first electromagnetic lock 1YL, the second end of the first electromagnetic lock 1YL is connected with the normally closed auxiliary contact 2DSC of the second isolating switch 2DS in the outgoing line loop, the normally closed auxiliary contact 2DSC of the second isolating switch 2DS is connected with the normally closed auxiliary contact 1CBC of the first circuit breaker 1CB in the outgoing line loop, the normally closed auxiliary contact 1CBC of the first circuit breaker 1CB is connected with the first end of the second fuse 2FU, the second end of the second fuse 2FU is connected with the negative power-HM of the switching-on small bus, the first end of the second electromagnetic lock 2YL is connected with the public end of the first fuse 1FU and the first electromagnetic lock 1YL, the second end of the second electromagnetic lock 2YL is connected with the normally closed auxiliary contact 1DSC of the first isolating switch 1DS in the outgoing line, the normally closed auxiliary contact 1DSC of the first disconnecting switch 1DS is connected with the common end of the normally closed auxiliary contact 2DSC of the second disconnecting switch 2DS and the normally closed auxiliary contact 1CBC of the first circuit breaker 1CB in the outlet circuit.
The second interlock control circuit may include: the fourth fuse 4 FU. Wherein, the first end of the fourth fuse 4FU is connected with the negative power supply-HM of the closing small bus, the second end of the fourth fuse 4FU is connected with the normally open auxiliary contact 2CBO of the second circuit breaker 2CB in the bus-coupled loop, the normally open auxiliary contact 2CBO of the second circuit breaker 2CB in the bus-coupled loop is connected with the normally open auxiliary contact 4DSO of the fourth isolating switch 4DS in the bus-coupled loop, the normally open auxiliary contact 4DSO of the fourth isolating switch 4DS is connected with the normally open auxiliary contact 3DSO of the third isolating switch 3DS in the bus-coupled loop, the normally open auxiliary contact 3DSO of the third isolating switch 3DS is connected with the small bus GBM of the isolating switch locking, the small bus GBM of the isolating switch locking is connected with the common end of the normally open auxiliary contact 2DSO of the second isolating switch 2DS and the normally open auxiliary contact 1DSO of the first isolating switch 1DS, the normally open auxiliary contact 2DSO of the second isolating switch 2DS is connected with the common end of the first electromagnetic lock 1YL and the common end of the auxiliary contact 2DSC of the, the normally open auxiliary contact 1DSO of the first disconnecting switch 1DS is connected with the common ends of the second electromagnetic lock 2YL and the normally closed auxiliary contact 1DSC of the first disconnecting switch 1 DS.
The third interlock control circuit may include: third fuse 3FU, fourth fuse 4FU, third electromagnetic lock 3YL and fourth electromagnetic lock 4 YL. Wherein, the first end of third fuse 3FU is connected with combined floodgate little generating line positive power supply + HM, the second end of third fuse 3FU is connected with the first end of third electromagnetic lock 3YL, the second end of third electromagnetic lock 3YL is connected with the normally closed auxiliary contact 2CBC of second circuit breaker 2CB, the normally closed auxiliary contact 2CBC of second circuit breaker 2CB is connected with the fourth fuse, the fourth fuse other end is connected with combined floodgate little generating line negative power supply-HM, the first end of fourth electromagnetic lock 4YL is connected with the common terminal of third fuse 3FU and third electromagnetic lock 3YL, the second end of fourth electromagnetic lock 4YL with the common terminal of the normally closed contact 2CBC of third electromagnetic lock 3YL and second circuit breaker is connected.
Specifically, in the interlock control circuit, the electromagnetic lock is connected to other elements through an electromagnetic lock coil inside the electromagnetic lock, and the interlock control circuit is turned on only by turning on the electromagnetic lock coil to conduct electricity.
Furthermore, the electromagnetic lock is also provided with a lock pin and a manual handle connected with the lock pin, wherein,
near first isolator 1DS pivot rear end axle bed is installed to first electromagnetic lock 1YL, its lockpin can insert in the axle bed hole of first isolator 1 DS's pivot, then when the lockpin on the first electromagnetic lock inserts in the axle bed hole of first isolator 1 DS's pivot, first isolator 1 DS's pivot can not rotate, when the lockpin on the first electromagnetic lock is extracted from the axle bed hole of first isolator 1 DS's pivot, first isolator 1 DS's pivot can rotate, can rotate the pivot closure at this moment or break off first isolator 1 DS.
Second electromagnetic lock 2YL installs near second isolator 2DS pivot rear end axle bed, its lockpin can insert in the axle bed hole of second isolator 2 DS's pivot, then when the lockpin on the second electromagnetic lock inserts in the axle bed hole of second isolator 2 DS's pivot, second isolator 2 DS's pivot can not rotate, when the lockpin on the second electromagnetic lock extracts from the axle bed hole of second isolator 2 DS's pivot, second isolator 2 DS's pivot can rotate, can rotate the pivot closure this moment or break off second isolator 2 DS.
The third electromagnetic lock 3YL is installed near a shaft base at the rear end of a rotating shaft of the third isolating switch 3DS, a lock pin of the third electromagnetic lock can be inserted into a shaft base hole of the rotating shaft of the third isolating switch 3DS, when the lock pin on the third electromagnetic lock is inserted into the shaft base hole of the rotating shaft of the third isolating switch 3DS, the rotating shaft of the third isolating switch 3DS cannot rotate, when the lock pin on the third electromagnetic lock is pulled out from the shaft base hole of the rotating shaft of the third isolating switch 3DS, the rotating shaft of the third isolating switch 3DS can rotate, and the rotating shaft can be rotated to be closed or the third isolating switch 3DS is disconnected at the moment.
Fourth electromagnetic lock 4YL installs near fourth isolator 4DS pivot rear end axle bed, its lockpin can insert the fourth and keep apart in the axle bed hole of 4DS switch's pivot, then when the lockpin on the fourth electromagnetic lock inserts the fourth and keeps apart in the axle bed hole of 4DS switch's pivot, fourth isolator 4 DS's pivot can not rotate, when the lockpin on the fourth electromagnetic lock extracts from the axle bed hole of fourth isolator 4 DS's pivot, fourth isolator 4 DS's pivot can rotate, can rotate the pivot closure this moment or break off fourth isolator 4 DS.
The dual bus control circuit shown in fig. 1 has two operation modes: the first mode is that two groups of buses work independently respectively, and the second mode is that one group of buses work and the other group of buses is standby. In this embodiment, a second working mode is mainly described, assuming that the bus IM is a working bus and the bus IIM is a standby bus, when the bus IM works normally, the disconnecting switch 1DS and the circuit breaker 1CB in the outgoing line loop are closed, the disconnecting switch 2DS is opened, and the circuit breaker 2CB, the disconnecting switch 2DS and the disconnecting switch 4DS in the bus tie loop are all opened.
The double-bus control circuit switching process is that an outgoing line loop on an operating bus IM is transferred to a standby bus IIM, the switching process firstly closes a third isolating switch 3DS, a fourth isolating switch 4DS and a second circuit breaker 2CB in a bus link loop in sequence, the bus IM charges the bus IIM to enable two groups of bus potentials to be equal, secondly closes the second isolating switch 2DS in the outgoing line loop and disconnects a first isolating switch 1DS in the outgoing line loop, namely, the outgoing line loop is transferred to the standby bus IIM, and finally disconnects the second circuit breaker 2CB, the fourth isolating switch 4DS and the third isolating switch 3DS in the bus link loop in sequence, the standby bus IIM starts to work, and the operating bus IM exits from work.
When the switching operation is started, the second circuit breaker 2CB in the bus coupling loop is disconnected, that is, the normally closed contact 2CBC of the second circuit breaker is in a closed state, as shown in fig. 3, when the third interlocking control circuit is switched on, the third electromagnetic lock 3YL and the fourth electromagnetic lock 4YL are switched on to receive power, and then the lock pin controlled by the third electromagnetic lock 3YL is released, at this time, a manual handle on the third electromagnetic lock 3YL is manually pulled to release the control of the lock pin on the third electromagnetic lock 3YL on the third isolating switch 3DS, and then the rotating shaft of the third isolating switch 3DS can be rotated to close the third isolating switch 3DS, and the handle on the third electromagnetic lock 3YL is released, so that the lock pin is automatically reset and is kept at a locking position; manually pulling a manual handle on the fourth electromagnetic lock 4YL to release the control of the lock pin on the fourth electromagnetic lock 4YL on the fourth isolating switch 4DS, rotating the rotating shaft of the fourth isolating switch 4DS to close the fourth isolating switch 4DS, releasing the handle on the fourth electromagnetic lock 4YL, automatically resetting the lock pin, and keeping the lock pin at the locking position; then the second circuit breaker 2CB is closed, so that the third interlocking control circuit finishes the work, that is, the operation time sequences of the disconnecting switch and the circuit breaker in the bus-coupled loop are controlled, the bus IM and the bus IIM are connected by the bus-coupled loop, and the bus IM charges the bus IIM, and finally the two groups of bus potentials are equal.
When the third and fourth disconnectors 3DS and 4DS and the second circuit breaker 2CB are closed, i.e., the normally open contact 3DSO of the third disconnecting switch 3DS, the normally open contact 4DSO of the fourth disconnecting switch 4DS, and the normally open contact 2CBO of the second circuit breaker are closed, whereby the second interlock control circuit portion is turned on, the blocking small bus GBM of the disconnecting switch and the negative power-HM of the closing small bus are equal in potential, as shown in fig. 1, since the 1DS is in a closed state at this time, the normally open contact 1DSO is closed, the other part of the second interlocking control circuit is connected, and after the second electromagnetic lock 2YL is connected to receive power, the lock pin controlled by the electromagnetic lock is released, at the moment, the manual handle of the second electromagnetic lock is manually pulled to release the control of the lock pin of the second electromagnetic lock on the second isolating switch 2DS, the rotating shaft of the second disconnecting switch 2DS can be rotated to close the second disconnecting switch 2 DS; after the second isolating switch 2DS is closed, the normally open contact 2DSO is closed, the second interlocking control circuit is connected, the first electromagnetic lock 1YC is connected and powered, the lock pin controlled by the first electromagnetic lock is released, at the moment, the manual handle of the first electromagnetic lock is manually pulled to remove the control of the lock pin of the first electromagnetic lock on the first isolating switch 1DS, the rotating shaft of the first isolating switch 1DS can be rotated to disconnect the first isolating switch 1DS, the operation time sequence of the bus coupling loop and the outgoing line loop is controlled, the programming of the switching operation is guaranteed, the outgoing line loop on the bus IM is transferred to the bus IIM, then the second circuit breaker 2CB, the third isolating switch 3DS and the fourth isolating switch 4DS are disconnected, the switching process is finished, and the standby bus IIM works.
As can be seen from the above description, the first interlock control circuit controls the operation timings of the disconnector in the outgoing line circuit and the circuit breaker in the outgoing line circuit. Only when the first circuit breaker 1CB is firstly opened, the normally closed contact 1CBC is closed, at this time, if the first disconnecting switch 1DS is in an opened state and the second disconnecting switch 2DS is in a closed state, the normally closed auxiliary contact 1DSC of the first disconnecting switch 1DS in the opened state is closed, the second electromagnetic lock 2YL is switched on to be electrified and powered, and then the lock pin controlled by the second electromagnetic lock is released, at this time, the manual handle of the second electromagnetic lock is manually pulled to release the control of the lock pin of the second electromagnetic lock on the second disconnecting switch 2DS, and then the rotating shaft of the second disconnecting switch 2DS can be rotated to open the second disconnecting switch 2 DS; on the contrary, if the first disconnecting switch 1DS is in the closed state, the second disconnecting switch 2DS is in the open state, and so on, the rotating shaft of the first disconnecting switch 1DS can be rotated to open the first disconnecting switch 1 DS. If the outgoing line loop is disconnected and needs to be connected to the bus again for work, at the moment, the 1DS, the 2DS and the 1CB are all in an off state, the normally closed auxiliary contacts 1DSC, 2DSC and 1CBC are all closed, the rotation limitation of the electromagnetic lock pin on the isolating switch can be removed, the first isolating switch 1DS or the second isolating switch 2DS can be operated to be switched on according to an instruction, then the first circuit breaker 1CB can be operated to be switched on, and the interlocking ensures that when the circuit breaker and the isolating switch are operated, the circuit breaker needs to be disconnected before the isolating switch and then be switched on in the operation time sequence of the circuit breaker, so that the misoperation of the isolating switch with load opening and closing is prevented.
It should be understood that this embodiment is only a preferred mode for implementing the invention, but not limiting the invention to the scope of the described embodiment, and that the invention is within the scope of the invention.
Claims (4)
1. An interlock control circuit for a dual bus control circuit, comprising: a closing small bus HM, a disconnecting switch locking small bus GBM, a first interlocking control circuit, a second interlocking control circuit and a third interlocking control circuit, wherein,
one end of the first interlocking control circuit is connected with the positive power supply + HM of the switching-on small bus, and the other end of the first interlocking control circuit is connected with the negative power supply-HM of the switching-on small bus, and the first interlocking control circuit is used for controlling the operation time sequence of an isolating switch and a circuit breaker in an outgoing line loop in the double-bus control circuit;
one end of the second interlocking control circuit is connected with the blocking small bus GBM of the isolating switch, and the other end of the second interlocking control circuit is connected with a negative power supply-HM of the closing small bus and is used for controlling the operation time sequence of a bus-coupled loop and an outgoing line loop in the double-bus control circuit;
one end of the third interlocking control circuit is connected with the positive power supply + HM of the small closing bus, and the other end of the third interlocking control circuit is connected with the negative power supply-HM of the small closing bus and is used for controlling the operation time sequence of an isolating switch and a circuit breaker in a bus-coupled loop in the double-bus control circuit;
the first interlocking control circuit, the second interlocking control circuit and the third interlocking control circuit comprise electromagnetic locks;
the electromagnetic lock is provided with a lock pin and a handle connected with the lock pin, and the lock pin can be inserted into a shaft seat hole of a rotating shaft of the isolating switch at a corresponding position and used for controlling the rotating shaft to rotate;
the handle is a manual handle and is used for controlling the lock pin to be inserted into a shaft seat hole of a rotating shaft of the isolating switch at a corresponding position or controlling the lock pin to be pulled out of the shaft seat hole.
2. The interlock control circuit according to claim 1, wherein the first interlock control circuit comprises: a first fuse, a first electromagnetic lock, a second fuse, and a second electromagnetic lock, wherein,
the first end of the first fuse is connected with a positive power supply + HM of a closing small bus, the second end of the first fuse is connected with the first end of the first electromagnetic lock, the second end of the first electromagnetic lock is connected with a normally closed auxiliary contact of a second isolating switch in an outgoing line loop, the normally closed auxiliary contact of the second isolating switch is further connected with the normally closed auxiliary contact of a first circuit breaker in the outgoing line loop, the normally closed auxiliary contact of the first circuit breaker is connected with the first end of the second fuse, the second end of the second fuse is connected with a negative power supply-HM of the closing small bus, the first end of the second electromagnetic lock is connected with the first fuse and a public end of the first electromagnetic lock, the second end of the second electromagnetic lock is connected with the normally closed auxiliary contact of the first isolating switch in the outgoing line loop, and the normally closed auxiliary contact of the first isolating switch is further connected with the normally closed auxiliary contact of the second isolating switch in the outgoing line loop and the outgoing line The common end of the normally closed auxiliary contact of the first circuit breaker in the circuit is connected.
3. The interlock control circuit of claim 2 wherein the second interlock control circuit includes a fourth fuse, wherein,
the first end of the fourth fuse is connected with the negative power-HM of the closing small bus, the second end of the fourth fuse is connected with the normally open auxiliary contact of the second circuit breaker in the bus-coupled loop, the normally open auxiliary contact of the second circuit breaker is connected with the normally open auxiliary contact of the fourth isolating switch in the bus-coupled loop, the normally open auxiliary contact of the fourth isolating switch is further connected with the normally open auxiliary contact of the third isolating switch in the bus-coupled loop, the normally open auxiliary contact of the third isolating switch is further connected with the GBM of the isolating switch locking small bus, the GBM of the isolating switch locking small bus is further connected with the common end of the normally open auxiliary contact of the second isolating switch and the normally open auxiliary contact of the first isolating switch, and the normally open auxiliary contact of the second isolating switch is further connected with the common end of the normally closed auxiliary contact of the first electromagnetic lock and the second isolating switch, and the normally open auxiliary contact of the first isolating switch is also connected with the common ends of the second electromagnetic lock and the normally closed auxiliary contact of the first isolating switch.
4. The interlock control circuit of claim 1 wherein the third interlock control circuit comprises a third fuse, a fourth fuse, a third electromagnetic lock, and a fourth electromagnetic lock, wherein,
the first end of third fuse with combined floodgate little generating line positive power supply + HM is connected, the second end of third fuse with the first end of third electromagnetic lock is connected, the second end of third electromagnetic lock with the auxiliary normally closed contact of female antithetical couplet return circuit second circuit breaker is connected, the auxiliary normally closed contact of second circuit breaker still with combined floodgate little generating line negative power supply-HM is connected, the first end of fourth electromagnetic lock with the third fuse with the common port of third electromagnetic lock is connected, the second end of fourth electromagnetic lock with the third electromagnetic lock with the common port of second circuit breaker auxiliary normally closed contact is connected.
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| CN107908137A (en) * | 2017-12-04 | 2018-04-13 | 常熟开关制造有限公司(原常熟开关厂） | Electrical interlocking control device and its control method, automatic change-over |
| CN107994578A (en) * | 2018-01-05 | 2018-05-04 | 中国能源建设集团陕西省电力设计院有限公司 | A kind of bus single-subsection and double section wiring anti-incorrect manipulation deadlock control loops |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107908137A (en) * | 2017-12-04 | 2018-04-13 | 常熟开关制造有限公司(原常熟开关厂） | Electrical interlocking control device and its control method, automatic change-over |
| CN107908137B (en) * | 2017-12-04 | 2019-06-28 | 常熟开关制造有限公司(原常熟开关厂） | Electrical interlocking control device and its control method, automatic change-over |
| CN107994578A (en) * | 2018-01-05 | 2018-05-04 | 中国能源建设集团陕西省电力设计院有限公司 | A kind of bus single-subsection and double section wiring anti-incorrect manipulation deadlock control loops |
| CN107994578B (en) * | 2018-01-05 | 2024-05-24 | 中国能源建设集团陕西省电力设计院有限公司 | Double-bus single-section and double-section wiring misoperation-preventing locking control loop |
| CN108574279A (en) * | 2018-06-04 | 2018-09-25 | 河南森源电气股份有限公司 | A kind of double-bus back brake anti-misoperation control device and a kind of double-bus power supply system |
| CN108574279B (en) * | 2018-06-04 | 2024-01-19 | 河南森源电气股份有限公司 | Double-bus switching misoperation prevention control device and double-bus power supply system |
| CN110729716A (en) * | 2018-07-17 | 2020-01-24 | 河南平芝高压开关有限公司 | A circuit with double busbars inverting bus operation and sharing auxiliary contacts |
| CN110729716B (en) * | 2018-07-17 | 2023-10-27 | 河南平芝高压开关有限公司 | Circuit for sharing auxiliary contact for double-bus inverted bus operation |
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Effective date of registration: 20201110 Address after: No.107 Nanzheng street, TangChang Town, Pidu District, Chengdu, Sichuan 610000 Patentee after: Sichuan Electric Appliance Group middle and low voltage intelligent Distribution Co.,Ltd. Address before: Pixian 611733 Sichuan province Chengdu city TangChang Town North Street Patentee before: SICHUAN ELECTRICAL APPARATUS Co.,Ltd. |