CN206611180U - Double-bus secondary voltage switching circuit and its self-hold circuit - Google Patents
Double-bus secondary voltage switching circuit and its self-hold circuit Download PDFInfo
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- CN206611180U CN206611180U CN201720325672.9U CN201720325672U CN206611180U CN 206611180 U CN206611180 U CN 206611180U CN 201720325672 U CN201720325672 U CN 201720325672U CN 206611180 U CN206611180 U CN 206611180U
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Abstract
Disclosure double-bus secondary voltage switching circuit and its self-hold circuit；Self-hold circuit includes dc source；It is connected to first, second and third and four-way electronic loop of dc source positive and negative electrode；I is female and the female two-position relay of II, and I is female and the female auxiliary switches of II are normally opened and normally closed contact；The female normally opened contacts of the first I of I mother's two-position relay are synchronous with the first actuation coil normal opened contact, and II mother's two-position relay is same；I mother's auxiliary switches are normally opened and normally closed contact, the first involution coil normally closed contact and actuation coil normal opened contact, the first action and involution coil are serially connected with the first and second energization sub-loops respectively；II mother's auxiliary switches are normally opened and normally closed contact, normally closed the second involution coil and actuation coil normal opened contact, the second action and involution coil are serially connected with the third and fourth energization sub-loop respectively.The application can solve the problem that existing auxiliary switch contact closes secondary voltage switching device operation irregularity problem caused by bad or dc source decompression.
Description
Technical field
The application is related to secondary voltage handoff technique field, more particularly to a kind of double-bus secondary voltage switching circuit and its
Self-hold circuit.
Background technology
The high-tension switch cabinet that double-bus is powered, as shown in figure 1, I mother PT21 and II mother PT22 (Potential
Transformer, voltage transformer) come secondary voltage, either protection voltage or metered voltage, are required to pass through
The secondary voltage switching dress of the auxiliary switch contact control of bus isolation switch (I mother's isolation switch 24 and the female isolation switch 25 of II)
Which put, to realize the collection to the PT secondary voltages come, switching and export, with the final secondary voltage determined by section bus PT
It is powered to each device in outgoing switch cubicle 26.
Specifically, an Electrical System of a kind of double-bus power supply mode middle-high voltage switch that Fig. 1 provides for prior art
System circuit diagram.As shown in figure 1, I mother PT21 and II mothers PT22 is connected to, I is female with mother II, and 24 be the female isolation switch of I, 25
For the female isolation switch of II.As shown in Fig. 2 the secondary electricity needed for the high-tension switch cabinet powered for double-bus, this high-tension switch cabinet
Press, either second protection measurement voltage or secondary measurement voltage, the secondary voltage of voltage transformer output passes through I mothers respectively
It is female with II, then respectively by the auxiliary switch contact of I mothers isolation switch 24 in Fig. 1, the female isolation switch 25 of II control it is secondary
Voltage switching device 20, to realize collection, switching and the output to secondary voltage, and then is determined specific by which section bus PT's
Secondary voltage is powered.Wherein, secondary voltage switching device 20 is installed on the cabinet face of high-tension switch cabinet, and secondary voltage switching dress
The position relay course of work in 20 is put to be controlled by female and the female isolation switch of II the auxiliary switch normal opened contacts (G1 and G2) of I respectively
System；In the auxiliary switch normal opened contact G1 closures of the female isolation switch of I, position relay 1YQ is connected to the female voltage transformers two of I
The normally opened contact closure of circuit between secondary voltage circuit and high-tension switch cabinet secondary voltage air switch, similarly, in the female isolation switch of II
Auxiliary switch normal opened contact G2 closures when, position relay 2YQ be connected to the female voltage transformer secondary voltage circuits of II with it is high
The normally opened contact closure of circuit between the cabinet secondary voltage air switch that compresses switch.
If however, the auxiliary switch associated contacts of isolation switch close bad and its circuit breaking, or direct current on bus
The reasons such as power safety fusing, dc source power failure, may cause secondary voltage switching device operation irregularity, switch relay
Dead electricity, interior contacts disconnect, and then cause high-tension switch cabinet protective relaying device to be likely to occur malfunction, tripping and electric energy metrical
Leakage meter.
Utility model content
This application provides double-bus secondary voltage switching circuit and its self-hold circuit, to solve to isolate in the prior art
During the auxiliary switch contact abnormal or dc source decompression of work of disconnecting link, the work of secondary voltage switching device is easily caused different
Often the problem of.
In a first aspect, this application provides a kind of self-hold circuit of double-bus secondary voltage switching, including：Direct current
Source；It is connected to the first power circuit and the second power circuit between the positive and negative electrode two ends of the dc source；Successively
It is serially connected with the female isolation switch auxiliary switch contacts of I and the female two-position relay of I of first power circuit；It is sequentially connected in series in institute
State the female isolation switch auxiliary switch contacts of II and the female two-position relay of II of the second power circuit；The first power circuit bag
Include the first energization sub-loop and the second energization sub-loop；It is normal that the female isolation switch auxiliary switch contacts of the I include the female auxiliary switches of I
Open contact and the female auxiliary switch normally closed contacts of I；The female two-position relay of the I includes the female normally opened contacts of the first I, the first actuating wire
Circle, the first involution coil, the first actuation coil normal opened contact and the first involution coil normally closed contact, wherein, the first I is female
Normally opened contact is synchro switch with the first actuation coil normal opened contact；Wherein, the female auxiliary switch normal opened contact of the I, the
One involution coil normally closed contact and the first actuation coil are serially connected with the first energization sub-loop, and the female auxiliary switches of the I are normally closed
Contact, the first actuation coil normal opened contact and the first involution coil tandem are in the second energization sub-loop；Described second is powered
Loop includes threeway electronic loop and four-way electronic loop；It is auxiliary that the female isolation switch auxiliary switch contacts of the II include mother II
Help switch normal opened contact and the female auxiliary switch normally closed contacts of II；It is female normally opened tactile that the female two-position relay of the II includes the first II
Point, the second actuation coil, the second involution coil, the second actuation coil normal opened contact and the second involution coil normally closed contact, its
In, the female normally opened contacts of the first II and the second actuation coil normal opened contact are synchro switch；Wherein, the II mothers auxiliary
Switch normal opened contact, the second involution coil normally closed contact and the second actuation coil are serially connected with the threeway electronic loop, described
II mother's auxiliary switches normally closed contact, the second actuation coil normal opened contact and the second involution coil tandem are returned in the four-way electronics
Road.
With reference in a first aspect, in the first optional embodiment of first aspect, the double-bus secondary voltage is cut
The self-hold circuit changed also includes：Be in series with the female auxiliary switch normal opened contacts of the I and with the female two-position relay of the I
The female voltage indicator lamps of I being in parallel；And be in series with the female auxiliary switch normal opened contacts of the II and with the female two-positions of the II
The female voltage indicator lamps of II that relay is in parallel.
With reference in a first aspect, in second of optional embodiment of first aspect, the female two-position relay of the I is also
Including the female normally opened contacts of the 2nd I, wherein, the female normally opened contacts of the 2nd I are synchronous with the first actuation coil normal opened contact
Switch；The female two-position relay of the II also includes the female normally opened contacts of the 2nd II, wherein, the female normally opened contacts of the 2nd II and institute
The second actuation coil normal opened contact is stated for synchro switch；The self-hold circuit of the double-bus secondary voltage switching also includes secondary
Selection relay acts warning circuit simultaneously, and the secondary voltage switching relay acts warning circuit simultaneously to be included：Even
The 3rd power circuit and secondary voltage switching for being connected to the positive and negative electrode two ends of the dc source act warning device simultaneously；
Wherein, the female normally opened contacts of the 2nd I, the female normally opened contacts of the 2nd II and secondary voltage switching act alarm simultaneously
Device is sequentially connected in series on the 3rd power circuit.
It is described in the third optional embodiment of first aspect with reference to second of embodiment of first aspect
Secondary voltage switching acts warning device and acts alarm lamp simultaneously including secondary voltage switching simultaneously.
It is described in the 4th kind of optional embodiment of first aspect with reference to second of embodiment of first aspect
The self-hold circuit of double-bus secondary voltage switching also includes：Switch action warning device simultaneously with the secondary voltage to electrically connect
The female interim short-circuit devices of auxiliary switch normally closed contact of I；And switch with the secondary voltage while action warning device is electrically connected
The interim short-circuit device of the female auxiliary switch normally closed contacts of II connect；Wherein, the interim short-circuit device of the female auxiliary switch normally closed contacts of the I
The female auxiliary switch normally closed contact two ends of the I are connected to, the female interim short-circuit devices of auxiliary switch normally closed contact of the II are connected to
The female auxiliary switch normally closed contact two ends of the II.
It is described in the 5th kind of optional embodiment of first aspect with reference to the 4th kind of embodiment of first aspect
The self-hold circuit of double-bus secondary voltage switching also includes：It is serially connected with the first involution coil work of the second energization sub-loop
Make instruction device；And it is serially connected with the second involution coil working instruction device of the four-way electronic loop.
With reference to the 5th kind of embodiment of first aspect, in the 6th kind of optional embodiment of first aspect, the I
Female interim short-circuit device of auxiliary switch normally closed contact is also electrically connected with the first involution coil working instruction device；The II is female
The interim short-circuit device of auxiliary switch normally closed contact is also electrically connected with the second involution coil working instruction device.
It is described in the 7th kind of optional embodiment of first aspect with reference to the 5th kind of embodiment of first aspect
First involution coil working instruction device includes the first involution coil working indicator lamp；The second involution coil working indicates dress
Put including the second involution coil working indicator lamp.
Second aspect, this application provides a kind of double-bus secondary voltage switching circuit, including：
I mother's voltage transformer secondaries voltage bus, the female voltage transformer secondary voltage bus of II, the secondary electricity of high-tension switch cabinet
The self-hold circuit of double-bus secondary voltage switching any one of pressure air switch and above-mentioned technical proposal；Wherein,
The female voltage transformer secondary voltage bus of the I passes through the first two electric loops and high-tension switch cabinet secondary voltage air switches
Electrical connection；II mother's voltage transformer secondary voltage bus passes through the second two electric loops and high-tension switch cabinet secondary voltage air
Switch electrical connection；
The female normally opened contacts of the first I of the female two-position relay of the I be serially connected with the female voltage transformer secondary voltage bus of I with
The first two electric loops between high-tension switch cabinet secondary voltage air switch；First II of the female two-position relay of the II
Female normally opened contact is serially connected between the female voltage transformer secondary voltage bus of II and high-tension switch cabinet secondary voltage air switch
The second two electric loops.
Double-bus secondary voltage switching circuit and its course of work of self-hold circuit that the technical scheme of the application is provided
It is as follows：
When the female isolation switch of I is closing a floodgate operation, if the auxiliary switch normal opened contact closure of I mother's isolation switch, I is female double
First actuation coil of position relay obtains electric work, according to the operation principle of two-position relay, I mother's two-position relay
First I mothers normally opened contact will be closed and self-sustaining, then the second protection in the female voltage transformer secondary voltage bus of I is surveyed
Amount voltage has been connected to the first two times between high-tension switch cabinet secondary voltage air switch electrically through the female normally opened contacts of the first I
Loop.But due to the self-retaining function of the female two-position relay of I, both just the first actuation coil dead electricity, I mother's two-position relay
First I mothers normally opened contact still self-sustaining closure state.Only when the female isolation switch of I carries out sub-switching operation, corresponding I mothers isolation
Involution is closed the auxiliary switch normally closed contact of disconnecting link therewith, where the first involution coil for having connected the female two-position relay of I
Second energization sub-loop, only the first involution coil energized action, the first mother I that can disconnect the female two-position relay of I are normally opened
Contact, so as to cut off secondary between the female voltage transformer secondary voltage bus of I and high-tension switch cabinet secondary voltage air switch
Electric loop (secondary measurement voltage is similarly).It solves in the prior art that auxiliary switch is normally opened connects because the I of the female isolation switch of I is female
Point closes situations such as bad, circuit breaking, dc source fuse melting or dc source have a power failure, the female position relays of caused I
Actuation coil dead electricity, cause the normally opened contact of the female position relays of I to disconnect, the relay in the high-tension switch cabinet being likely to result in is protected
Hair of protection unit situations such as false protection, tripping (or electric energy metrical leakage meter occur) caused by losing secondary voltage possibility
It is raw.For the female two-position relay of II, II mother's isolation switch is in combined floodgate and separating brake, and it is secondary that its auxiliary switch contact is controlled
The operation principle of voltage switching circuit is identical with the female two-position relay of I.
By said process, the technical scheme of the application, when isolation switch is in closing operation, passes through two-position
The self-retaining function of relay, the auxiliary switch normal opened contact closure even in the I mothers of fortune or the female isolation switch of II is bad or straight
Power supply decompression is flowed, I mothers or the female two-position relay of II still are able to realize the self-retaining function of secondary voltage switching circuit so that I
The female normally opened contacts of the first II of the female normally opened contacts of first I of female two-position relay or the female two-position relay of II are stilled remain in
Closure state, and then can ensure that in the secondary voltage switching circuit where self-hold circuit, I is female or the female voltage transformers of II two
Secondary voltage exports reliable protection voltage (or metered voltage) through self-hold circuit to high-tension switch cabinet, can be prevented effectively from
Malfunction, the tripping (or situation of electric energy metrical leakage meter) of protective relaying device in high-tension switch cabinet.
Only when I mothers or the female isolation switch of II carry out sub-switching operation, the auxiliary of the female isolation switch of corresponding I mothers or II is opened
Closing normally closed contact, involution is closed therewith, is respectively turned on the first involution coil or the female two-position relays of II of the female two-position relay of I
The power circuit of second involution coil of device, the first involution coil or the second involution coil energized action, can disconnect the female dibits of I
The female normally opened contacts of the first I of relay or the female normally opened contacts of the first II of the female two-position relay of II are put, it is female so as to cut off I
Or the secondary electric loop between the female voltage transformer secondary voltage bus of II and high-tension switch cabinet secondary voltage air switch, it is real
The switching of secondary voltage is showed.
Brief description of the drawings
In order to illustrate more clearly of the technical scheme of the application, letter will be made to the required accompanying drawing used in embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without having to pay creative labor,
Other accompanying drawings can also be obtained according to these accompanying drawings.
An a kind of electrical system circuit of double-bus power supply mode middle-high voltage switch that Fig. 1 provides for prior art
Figure；
A kind of secondary voltage switching circuit electrical connection circuit figure that Fig. 2 provides for prior art；
A kind of wiring diagram of the self-hold circuit for double-bus secondary voltage switching that Fig. 3 provides for the embodiment of the present application；
Fig. 4 is a kind of I mothers in embodiment illustrated in fig. 3 or the electrical connection diagram of the female two-position relay of II；
Fig. 5 is the indicating lamp structure schematic diagram on a kind of double-bus secondary voltage switching device panel.
The corresponding relation of structure title and reference is as follows in each embodiment shown in Fig. 1 to Fig. 5：
1- dc sources, the power circuits of 2- first, the first energizations of 21- sub-loop, the second energizations of 22- sub-loop, 3- second
The female isolation switch auxiliary switch contact of power circuit, 31- threeways electronic loop, 32- four-ways electronic loop, 4-I, 41-I are female
The female auxiliary switch normally closed contact of auxiliary switch normal opened contact, 42-I, the female two-position relay of 5-I, the female normally opened contacts of the I of 51- the first,
The actuation coils of 52- first, the first actuation coils of 53- normal opened contact, the first involutions of 54- coil, 55- the first involution coils are normally closed connects
The female normally opened contact of point, the I of 56- the 2nd, the female isolation switch auxiliary switch contacts of 6-II, the female auxiliary switch normal opened contacts of 61-II, 62-
II mothers auxiliary switch normally closed contact, the female two-position relay of 7-II, the female normally opened contacts of the II of 71- the first, the actuation coils of 72- second,
The second actuation coils of 73- normal opened contact, the second involutions of 74- coil, 75- the second involution coils normally closed contact, the II of 76- the 2nd are female often
Contact, the female voltage indicator lamps of 8-I, the female voltage indicator lamps of 9-II, 10- secondary voltages switching relay are driven while acting alarm electricity
Road, the power circuits of 101- the 3rd, the switching of 102- secondary voltages act warning device, the switching of 1021- secondary voltages and moved simultaneously simultaneously
Make the interim short-circuit device of the female auxiliary switch normally closed contact of alarm lamp, 11-I, the female auxiliary switch normally closed contacts of 12-II temporarily short
Connection device, 13- the first involution coil workings instruction device, 131- the first involution coil workings indicator lamp, 14- the second involution coils
The female voltage transformer secondary voltage bus of working indicator, 141- the second involution coil workings indicator lamp, 15-I, 16-II are female
Voltage transformer secondary voltage bus, 17- high-tension switch cabinet secondary voltages air switch, 18- the first two electric loops, 19-
The second two times electric loop, 20- secondary voltages switching device, the female voltage transformers of 21-I, the female voltage transformers of 22-II, 23- are female
Join the female isolation switch of breaker, 24-I, the female isolation switch of 25-II, 26- outgoing switch cubicles.
Embodiment
Referring to Fig. 3, a kind of wiring of the self-hold circuit of the double-bus secondary voltage switching provided for the embodiment of the present application
Figure, as shown in figure 3, the self-hold circuit of double-bus secondary voltage switching, including：
Dc source 1；
The dc source 1 is used for for the female isolation switch auxiliary switch contacts 4 of following I, the female isolation switch auxiliary switches of II
The part such as the female two-position relay 5 of contact 6, I and the female two-position relay 7 of II provides working power voltage, wherein, the direct current
The supply voltage in source 1 can be 220V.
It is connected to the first power circuit 2 and the second power circuit 3 between the positive and negative electrode two ends of dc source 1；
It is sequentially connected in series the female isolation switch auxiliary switch contacts 4 of I and the female two-position relay 5 of I in the first power circuit 2；
And it is sequentially connected in series the female isolation switch auxiliary switch contacts 6 of II and the female two-position relay 7 of II in the second power circuit 3；
First power circuit 2 includes the first energization sub-loop 21 and the second energization sub-loop 22；Wherein, first it is powered sub time
Road 21 is used to connecting the female auxiliary switch normal opened contacts 41 of following I, the first involution coil of the female two-position relay 5 of I normally closed connects
First actuation coil 52 of 55 sums of point；The female auxiliary switch normally closed contacts 42 of I, the I that second energization sub-loop 22 is used to connect are female double
The the first actuation coil normal opened contact 53 and the first involution coil 54 of position relay 5.
By above-mentioned connected mode, the female auxiliary switch normal opened contacts 41 of I are enabled to control the first actuation coil 52, II is female
Auxiliary switch normal opened contact 42 controls the first involution coil 54.
I mothers isolation switch auxiliary switch contact 4 includes the female auxiliary switch normal opened contacts 41 of I and I, and female auxiliary switch is normally closed connects
Point 42；When the female isolation switch of I does not close a floodgate power transmission, I mother's auxiliary switches normal opened contact 41 is off, I mother's auxiliary switches
Normally closed contact 42 is in closed communicating state.
I mother's two-position relay 5 include the female normally opened contacts 51 of the first I, the first actuation coil 52, the first involution coil 54,
The female normally opened contact 56 of first actuation coil normal opened contact 53, the first involution coil normally closed contact 55 and the 2nd I, wherein, the first I
The female normally opened contact 56 of female normally opened contact 51, the first actuation coil normal opened contact 53 and the 2nd I is synchro switch, can be synchronous
Closure disconnects.Specifically, the first actuation coil 52 then fails when the female isolation switch auxiliary switch contacts 41 of I are not closed
Electricity, now, the first actuation coil normal opened contact 53 are off, and the first involution coil normally closed contact 55 is in closed form
State.
Wherein, the structure and operation principle of the two-position relay with reference to shown in Fig. 4, with the conjunction of I mothers isolation switch in Fig. 3
It is described below exemplified by lock and sub-switching operation, the secondary voltage switch operating process of I mother's two-position relay 5：First actuation coil
52 are connected in series the first involution coil normally closed contact 55, and the first involution coil 54 is connected in series the first actuation coil normal opened contact
53；When the female isolation switch closing operations of I, the first actuation coil 52 of I mother's two-position relay 5 obtains electric, i.e. its energized action
Moment, the first actuation coil normal opened contact 53 closure is connected so that corresponding first involution coil 54, which is in, prepares to obtain electricity condition；
Simultaneously so that the first involution coil normally closed contact 55 disconnects, so cause the dead electricity of the first actuation coil 52；At the same time, I is female double
The female closure of normally opened contact 51 of first I of position relay is connected and self-sustaining, by the first two times of the self-hold circuit electrically
Loop 18, and then can ensure that the second protection measurement voltage of the female voltage transformer outputs of I still is able to reliably export paramount press off
The second protection measurement voltage circuit of cabinet is closed, switch cubicle relay protection caused by secondary voltage decompression is possible is effectively prevent and fills
Malfunction, the tripping put.It solves as shown in Figure 2 that auxiliary switch is normally opened connects because the I of the female isolation switch of I is female in the prior art
Point G1 closes bad, circuit breaking, DC power supply switch and disconnects (fuse melting) or dc source power failure, the female positions of caused I
Relay 1YQ coil losing electricity, causes the normally opened contact of the female position relays of I to disconnect, in the high-tension switch cabinet being likely to result in
Generation of protective relaying device situations such as false protection, tripping caused by losing secondary voltage possibility.Certainly, according to two-position
The female normally opened contacts 56 of the 2nd I of the female two-position relay 5 of I in the structure and operation principle of relay, Fig. 3 are also closed at connecing
It is logical.
Only when the female isolation switch of I carries out sub-switching operation, the auxiliary switch normally closed contact 42 of the female isolation switch of corresponding I
Just involution is to on-state is closed therewith, then, and the electric of the first involution coil 54 for having connected the female two-position relay 5 of I returns
Road, the energized action of the first involution coil 54 can disconnect the female normally opened contacts 51 of the first I of the female two-position relay 5 of I, so as to cut
The first two times between the female voltage transformer secondary voltage bus 15 of disconnected I and high-tension switch cabinet secondary voltage air switch 17 are electrically
Loop 18.Certainly, according to the structure and operation principle of two-position relay, meanwhile, the first action of I mother's two-position relay 5
The I of coil normal opened contact 53 and the 2nd mother's normally opened contacts 56 also disconnect therewith.
Second power circuit 3 includes threeway electronic loop 31 and four-way electronic loop 32.
II mother's isolation switch auxiliary switch contact 6 includes the female auxiliary switch normal opened contacts 61 of II and the female auxiliary switches of II are normally closed
Contact 62.
II mother's two-position relay 7 includes the female normally opened contacts 71 of the first II, the second actuation coil 72, the second involution coil
74th, the female normally opened contacts 76 of the II of normally closed contact 75 and the 2nd of the second actuation coil normal opened contact 73, the second involution coil 74, its
In, the first II mothers normally opened contact 71, the female actuation coil normal opened contacts 73 of normally opened contact 76 and second of the 2nd II are synchronous open
Close.
Wherein, the female auxiliary switch normal opened contacts 61 of II, the second involution coil normally closed contact 75 and the second actuation coil 72 according to
It is secondary to be serially connected with threeway electronic loop 31, II mother's auxiliary switches normally closed contact 62, the second actuation coil normal opened contact 73 and second
Involution coil 74 is sequentially connected in series in four-way electronic loop 32.
The operation principle and the female isolation switch secondary voltage switch operating processes of II and I of II mother's two-position relay 7 are female double
Position relay 5 and the female isolation switch secondary voltage switch operating processes of I are identical, will not be described in detail herein.
In addition, as high voltage load that current high-tension switch cabinet is supplied is powered by the female isolation switch of I, i.e. I mother's isolation switch is in
Combined floodgate transmission operation state, then the female auxiliary switch normal opened contacts 41 of I are in closure on-state, and the of I mother's two-position relay 5
One actuation coil 52 it is electric, its first I mother's normally opened contacts 51 are remained closed and kept, and have connected the first two electric loops 18.
When needing to supply high voltage load by the female isolation switch power switchings of I to when being powered by the female isolation switch of II high-tension switch cabinet,
I mothers and II mothers first should be subjected to Loop Closing Operation, be i.e. after the female Loop Closing Operation of I mothers and II is completed, then operate the female isolation switch conjunctions of II
Lock, then the female auxiliary switch normal opened contacts 61 of II of the female isolation switch of II, which are in, closes on-state, II mother's two-position relay 7
Second actuation coil 72 electric, its first II mother's normally opened contact 71 closures and self-sustaining, connected the second two electric loops 19.
So, the female voltage transformer secondary voltages of I are in paired running state with the female voltage transformer secondary voltages of II.Now, I is operated
Female isolation switch separating brake, then the female involutions of auxiliary switch normally closed contact 42 of the I of the female isolation switch of I are to closing on-state, I mother's dibits
The the first involution coil 54 for putting relay 5 obtains electric, according to the operation principle of two-position relay 5, by the female two-position relay 5 of I
The female normally opened contacts 51 of the first I disconnect, cut off the female voltage transformer secondary voltage bus 15 of I and exported secondary to high-tension switch cabinet
Protection voltage, that is, be disconnected the first two electric loops 18.It is final to realize by the female voltage transformer secondary voltage bus of II
16 measure voltage to high-tension switch cabinet output second protection.
To sum up, the self-hold circuit for the double-bus secondary voltage switching that the embodiment of the present application is provided, in I mothers or II mother's isolation
When disconnecting link is in "on" position, by I mothers or the self-retaining function of the female two-position relay of II, the female two-position relays of I can be caused
The female normally opened contacts 71 of the first II of the female normally opened contacts 51 of first I of device 5 or the female two-position relay 7 of II are maintained at closure state；
It is solved as shown in Figure 2 in the prior art because of I mothers or the female auxiliary switch normal opened contacts of II in I mothers or the female isolation switch of II
Close bad, circuit breaking, DC power supply switch and disconnect situations such as (fuse melting) or dc source have a power failure, caused I it is female or
The coil losing electricity of II mother's position relays, causes I female or the normally opened contact of the female position relays of II disconnects, the high pressure being likely to result in
Generation of protective relaying device situations such as false protection, tripping caused by losing secondary voltage possibility in switch cubicle.
Only when I mothers or the female isolation switch of II carry out sub-switching operation, the female auxiliary switch normally closed contact of corresponding I mothers or II
Involution closes on-state, has been respectively turned on the first involution coil 54 or the female two-position relay of II of the female two-position relay 5 of I
The power circuit of 7 the second involution coil 74, the first involution coil 54 or the energized action of the second involution coil 74, can disconnect I
The female normally opened contacts 71 of the first II of the female normally opened contacts 51 of first I of female two-position relay 5 or the female two-position relay 7 of II, from
And cut off two between I mothers or the female voltage transformer secondary voltage bus of II and high-tension switch cabinet secondary voltage air switch 17
Secondary electric loop.
In addition, in order that obtaining monitoring personnel clearly knows that I is female or the female isolation switch of II is when combined floodgate power transmission is operated, mother I is auxiliary
Help switch normal opened contact 41 or the female auxiliary switch normal opened contacts 61 of II whether closed intact, and then learn that the first mother I is normally opened
Whether the II of contact 51 or the first mother's normally opened contacts 71 are maintained at closure state, so as to further learn that the double-bus secondary voltage is cut
Whether the self-hold circuit changed make it that the second protection that the female voltage transformer secondary voltage bus 15 of I is sent measures voltage and II is female
Whether the second protection measurement voltage that voltage transformer secondary voltage bus 16 is sent has been communicated to the secondary guarantor of high-tension switch cabinet
Shield measurement voltage electric loop；As a kind of preferred embodiment, as shown in figure 3, the secondary electricity of double-bus that the present embodiment is provided
The self-hold circuit that crush-cutting is changed, in addition to：
The female voltages of I for being in series and being in parallel with the female two-position relay 5 of I with the female auxiliary switch normal opened contacts 41 of I are indicated
Lamp 8.I mothers voltage indicator lamp 8 and I mother's auxiliary switches normal opened contact 41 is in series, that is, is connected in the first energization sub-loop 21, energy
Enough be powered when the female auxiliary switch normal opened contacts 41 of I are closed is lighted, so that it is closed to send the female auxiliary switch normal opened contacts 41 of I
Instruction, and show high-tension switch cabinet supply high voltage load to be powered by the female isolation switch of I；When the female auxiliary switch normal opened contacts of I
During 41 closure, if I mother's two-position relay 5 is working properly, the female normally opened contacts 51 of the first I of I mother's two-position relay 5 can be closed
Merge self-sustaining, so that the second protection of I mother's voltage transformer secondaries voltage bus 15 measures Voltage On state to high pressure
Switch cubicle secondary voltage air switch 17；Therefore, the female voltage indicator lamps 8 of I can indicate the work of the female normally opened contacts 51 of the first I indirectly
Make situation so that monitoring personnel can clearly know the work shape of the female two-position relay 5 of I and the female normally opened contacts 51 of the I of Qi mono-
State.
And the II mothers for being in series and being in parallel with the female two-position relay 7 of II with the female auxiliary switch normal opened contacts 61 of II
Voltage indicator lamp 9.II mothers voltage indicator lamp 9 and II mother's auxiliary switches normal opened contact 61 is in series, that is, is connected to threeway electronics
On loop 31, it can be powered and light when the female auxiliary switch normal opened contacts 61 of II are closed, so that it is normally opened to send the female auxiliary switches of II
The closed instruction of contact 61, and show high-tension switch cabinet supply high voltage load to be powered by the female isolation switch of II；When II is female
When auxiliary switch normal opened contact 61 is closed, if II mother's two-position relay 7 is working properly, the of II mother's two-position relay 7
One II mother's normally opened contacts 71 can be closed and self-sustaining, so that the secondary guarantor of II mother's voltage transformer secondaries voltage bus 16
Shield measures Voltage On state to the secondary voltage air switch 17 of high-tension switch cabinet；Therefore, the female voltage indicator lamps 9 of II can refer to indirectly
Show the working condition of the female normally opened contacts 71 of the first II so that monitoring personnel can clearly know the female two-position relay 7 of II and its
In the female normally opened contacts 71 of the first II working condition.
To sum up, by setting the female voltage indicator lamps 8 of I and the female voltage indicator lamps 9 of II, monitoring personnel is enabled to clearly to know
Female and the female auxiliary switch normal opened contacts of II the break-make situations of I, and female and the female two-position relay of II the work feelings of corresponding I
Condition.And know high-tension switch cabinet supply high voltage load female or powered by the female isolation switch of II by I.
In addition, being powered for high pressure double-bus, it is assumed that by the female loads of I down to after II mother's power supplies, to the female isolation switch of I
When carrying out sub-switching operation, if the loose contact of I mother's auxiliary switches normally closed contact 42 or non-involution closure are connected, I can be caused female double
First involution coil 54 of position relay 5, which fails to reply by cable, returns, then the female normally opened contacts 51 of the first I of the female two-position relay 5 of I
Closure state is still within, it is female with II that the second protection for causing the female voltage transformer secondary voltage bus 15 of I is measured into voltage
The second protection measurement voltage of voltage transformer secondary voltage bus 16 is in paired running state.Now I is female and mother II
Between bus, i.e. bus 23 in Fig. 1 is certainly also in "on" position, if now disconnecting the bus
23, then I buses high pressure can have a power failure decompression, then larger potential difference can be produced between the female two sections of bus high pressures of II I is female, two
Larger circulation will be formed in secondary voltage switching circuit, the secondary voltage air switch for directly resulting in two bus-bar potential transformers is jumped
Open or fuse melting, and then prevent protection supervisory equipment from adopting second protection voltage, false protection or tripping may be caused, very
Voltage transformer is burnt out to reverse charge.
In order to avoid above mentioned problem in time, as shown in figure 3, the self-insurance for the double-bus secondary voltage switching that the present embodiment is provided
Holding circuit also includes secondary voltage switching relay while acting warning circuit 10, and secondary voltage switching relay is acted simultaneously
Warning circuit 10 includes：It is connected to the 3rd power circuit 101 and the secondary voltage switching at the positive and negative electrode two ends of dc source 1
Warning device 102 is acted simultaneously.
Wherein, the female normally opened contacts 56 of the 2nd I, the female normally opened contacts 76 of the 2nd II and secondary voltage switching act alarm simultaneously
Device 102 is sequentially connected in series on the 3rd power circuit 101.Due to the female normally opened contacts 56 of the 2nd I with the first actuation coil is normally opened connects
Point 53 is synchro switch, and the 2nd II mother's normally opened contact 76 and second actuation coil normal opened contacts 73 are synchro switch, therefore, work as I
When the female isolation switch of female isolation switch and II is closed completely, the female normally opened contacts 76 of the 2nd I mother's normally opened contacts 56 and the 2nd II
It will close, and cause secondary voltage switching while early warning can be carried out by acting warning device 102.
To sum up, secondary voltage switching acts warning device 102 and the first of the female two-position relay 5 of I can be moved simultaneously
Make the second actuation coil 72 early warning of energized action progress simultaneously of coil 52 and the female two-position relay 7 of II, when I is female and II is female double
During the position secondary voltage switching relay progress of actuating circuit 10 early warning simultaneously, show to come from the female voltage transformer secondary electricity of I
The second protection measurement voltage circuit of pressure bus 15 and the second protection for coming from the female voltage transformer secondary voltage bus 16 of II
Measure voltage circuit and be in paired running state, this explanation, I is female to carry out cyclization and transfer bus operating process between II mothers
In, when disconnecting the female disconnecting switch of I or the female disconnecting switch of II (now I is female and II it is female between bus 23 and its both sides
Isolation switch closing position certainly), wherein I mothers auxiliary switch normally closed contact 42 or the female auxiliary switch normally closed contacts 62 of II fail multiple
Return closure to connect, cause the second of the first involution coil 54 in the female two-position relay 5 of I or the female two-position relay 7 of II to answer
Coil 74 is returned to fail energized action, the i.e. female normally opened contacts 51 of the first I or the female two-position relay 7 of II of I mother's two-position relay 5
The female normally opened contacts 71 of the first II, one group of contact therein fails in good time disconnection.Now remind operating personnel, it is impossible to disconnect I
Bus 23 between female and II is female, and then the generation of secondary voltage circuit fault can be prevented effectively from.
Alternatively, as shown in figure 3, secondary voltage switching is while action warning device 102 is same including secondary voltage switching
When act alarm lamp 1021., can be in time to behaviour by setting secondary voltage switching while acting alarm lamp 1021
Make personnel and indicate warning message, to avoid operating personnel to disconnect bus 23 in time, prevent secondary voltage circuit fault
Generation.
In this case, for prevent from disconnecting I is female and II it is female between bus 23 caused by secondary circuit failure
Occur, be used as a kind of preferred embodiment, the self-hold circuit for the double-bus secondary voltage switching that embodiment as shown in Figure 3 is provided
Also include：
The interim short-circuit device 11 of I mother's auxiliary switch normally closed contacts.
I mother's interim short-circuit devices 11 of auxiliary switch normally closed contact are connected to the female two ends of auxiliary switch normally closed contact 42 of I, are used for
The two-termial line of short circuit I mother's auxiliary switches normally closed contact 42.In the female loads of I carry out the cyclization operating process of falling bus to II mothers, and I
When the female isolation switch of female isolation switch and II is in combined floodgate running status (now I is female and II it is female between bus 23
And its isolation switch of both sides is closing position certainly), when completing I mother's isolation switch execution sub-switching operations, if I mother's auxiliary switches are normal
The involution of contact 42 closure loose contact is closed, then the first involution coil 54 of the female two-position relay 5 of I fails electric, according to dibit
The operation principle of relay is put, then the female normally opened contacts 51 of the first I of the female two-position relay 5 of I fail in good time disconnection, come from I
The second protection measurement voltage of female voltage transformer secondary voltage bus 15 is female with coming from the female voltage transformer secondary voltages of II
The second protection measurement voltage circuit of line 16 will be still in paired running state.Now, because of the female normally opened contacts 56 and second of the 2nd I
II mother's normally opened contacts 76, which are closed, has connected the 3rd power circuit 101, and secondary voltage switching acts alarm lamp 1021 simultaneously
Light, send secondary voltage switching relay to operating personnel while the warning message acted.It is female between II mothers disconnecting I
Before bus 23, the female auxiliary switches of short circuit I are used for by the interim short-circuit device 11 of the female auxiliary switch normally closed contacts of I normally closed
The two ends of contact 42, make the first involution coil 54 of the female two-position relay 5 of I obtain electric, then the first I of the female two-position relay 5 of I is female
Normally opened contact 51 disconnects in time, it is to avoid disconnect that I is female and II it is female between bus after, it is female between the female high pressures of II in I
Larger potential difference can be produced, larger circulation, caused secondary voltage circuit event will be produced in secondary voltage switching circuit
Barrier occurs.It is standby further to handle the failure of the female auxiliary switch normally closed contacts 42 of I.
And the interim short-circuit device 12 of normally closed contact of the female auxiliary switches of II.
II mother's interim short-circuit devices 12 of auxiliary switch normally closed contact are connected to the two ends of the female auxiliary switch normally closed contacts 62 of II,
For the female two-termial lines of auxiliary switch normally closed contact 62 of short circuit II.In the female loads of II the cyclization operating process of falling bus is carried out to I mothers
In, and the female isolation switch of I and II female isolation switch when being in combined floodgate running status (now I is female and II it is female between mother break
Road device 23 and its isolation switch of both sides are closing position certainly), when completing II mother's isolation switch execution sub-switching operations, if mother II is auxiliary
The involution closure loose contact of switch normally closed contact 62 is helped, then the second involution coil 74 of the female two-position relay 7 of II fails electric；
According to the operation principle of two-position relay, then the female normally opened contacts 71 of the first II of the female two-position relay 7 of II fail in good time disconnected
Open, come from the second protection measurement voltage of the female voltage transformer secondary voltage bus 16 of II and come from the female voltage transformers of I
The second protection measurement voltage circuit of secondary voltage bus 15 will be still in paired running state.Now, because the 2nd I is female normally opened tactile
The female normally opened contacts 76 of the II of point 56 and the 2nd, which are closed, has connected the 3rd power circuit 101, and secondary voltage switching acts alarm simultaneously
Indicator lamp 1021 is lighted, and sends secondary voltage switching relay to operating personnel while the warning message acted.Disconnect I it is female and
Before bus 23 between II is female, by the female auxiliary switch normally closed contacts of II, the interim short circuit II of short-circuit device 12 mothers aid in
The two ends of normally closed contact 62 are switched, the second involution coil 74 of the female two-position relay 7 of II is obtained electric, then the female two-position relay of II
The female normally opened contact 71 of 7 the first II disconnects in time, it is to avoid disconnect that I is female and II it is female between bus 23 after, I it is female and
Larger potential difference is produced between II mother's high pressures, larger circulation will be produced in secondary voltage switching circuit, it is caused secondary
Voltage circuit fault occurs.It is standby further to handle the failure of the female auxiliary switch normally closed contacts 62 of II.
To reduce the female isolation switch of I or the female isolation switch of II during sub-switching operation, because of the female auxiliary switch normally closed contacts of I
42 or II mother's auxiliary switches normally closed contact 62 works not in place, and possible caused two bus-bar potential transformer PT secondary voltage is returned
The harm of road circulation, the self-hold circuit for the double-bus secondary voltage switching that the embodiment of the present application is provided, in addition to：
It is serially connected with the first involution coil working instruction device 13 of the second energization sub-loop 22.And, it is serially connected with four-way
Second involution coil working instruction device 14 of electronic loop 32.
First involution coil working instruction device 13 is serially connected with the second energization sub-loop 22, due to the second energization sub-loop 22
On be serially connected with the female auxiliary switch normally closed contacts 42 of I, the first actuation coil normal opened contact 53 and the first involution coil 54, therefore, work as I
During female isolation switch sub-switching operation, if the involution closure of I mother's auxiliary switches normally closed contact 42 is connected, the second energization sub-loop 22 is led
Logical, the first involution coil working instruction device 13 can send the indication signal of the first involution coil 54 energization.When the female isolation knifes of I
Lock sub-switching operation, if the involution closure of I mother's auxiliary switches normally closed contact 42 is bad, the first involution coil working instruction device 13 is not
The indication signal of the first involution coil 54 energization can be sent, so that operating personnel close not to the female auxiliary switch normally closed contacts 42 of I
Good situation carries out early warning.Similarly, the second involution coil working instruction device 14 can be answered in the female auxiliary switch normally closed contacts 62 of II
When returning closure connection, the indication signal of the second involution coil 74 energization is sent, is closed in the female involutions of auxiliary switch normally closed contact 62 of II
When closing bad, then the indication signal of the second involution coil 74 energization will not be sent, so that operating personnel are normal to the female auxiliary switches of II
Close the closure unfavorable condition of contact 62 and carry out early warning.
In addition, the first involution coil working instruction device 13 can be with the interim short-circuit device 11 of the female auxiliary switch normally closed contacts of I
Electrical connection；It is bad or not closed to be closed in the first involution coil working instruction device 13 to the female auxiliary switch normally closed contacts 42 of I
When carrying out early warning, signal is sent to the female interim short-circuit devices 11 of auxiliary switch normally closed contact of I, with the female auxiliary switches of interim short circuit I
The two ends end points of normally closed contact 42.Similarly, the second involution coil working instruction device 14 can be with the female auxiliary switch normally closed contacts of II
Interim short-circuit device 12 is also with electrically connecting；With in the second involution coil working instruction device 14 to the female auxiliary switch normally closed contacts of II
62 closures are bad or during not closed progress early warning, signal is sent to the female interim short-circuit devices 12 of auxiliary switch normally closed contact of II, with
The interim female two ends end points of auxiliary switch normally closed contact 62 of short circuit II.
As a kind of optional embodiment, the first involution coil working instruction device 13 in embodiment as shown in Figure 3 is wrapped
Include the first involution coil working indicator lamp 131.Second involution coil working instruction device 14 refers to including the second involution coil working
Show lamp 141.By setting involution coil working instruction device to include involution coil working indicator lamp, operating personnel's energy is enabled to
Enough directly perceived and the clearly female auxiliary switch normally closed contacts 42 of monitoring I and the female auxiliary switch normally closed contacts 62 of II working condition.
The part-structure that dotted line frame includes in Fig. 3, such as I mother's two-position relay 5, II mother's two-position relay 7 and correlation
Contact etc., that is, constitute the main body of the self-hold circuit that double-bus secondary voltage switches in the application：Secondary voltage switching device.
In addition, the female voltage indicator lamps 8 of above-mentioned I, the female voltage indicator lamps 9 of II, secondary voltage switching are while act police instruction
Lamp 1021, the first involution coil working indicator lamp 131 and the second involution coil working indicator lamp 141 can be shown in two in Unified Set
On secondary voltage switching device panel, as shown in figure 5, Fig. 5 switches indication panel I comprising secondary voltage and secondary voltage switching is indicated
Panel II, wherein, secondary voltage switching indication panel I includes each indicator lamp for indicating that second protection measures voltage, secondary electricity
Crush-cutting changes each indicator lamp that indication panel II includes indicating secondary measurement voltage.Also can be aobvious to background monitoring by communication transfer
Show in device, whether operating personnel can light situation by each indicator lamp for checking, monitoring in secondary voltage switching device in good time, can
Sentence and know isolation switch auxiliary switch contact closure, disconnection, to be operated to the self-hold circuit that the secondary voltage switches
The failure being likely to occur in journey is handled in time.
In addition, switching and self-sustaining that each embodiment of this specification measures voltage with second protection are introduced,
The secondary voltage switching and self-hold circuit that the application is provided can be used for switching and self-sustaining secondary measurement voltage, work as switching
Or during self-sustaining secondary measurement voltage, the secondary measurement voltage in Fig. 3 will be directly accessed the electric energy installed to high-tension switch cabinet
Table.
Each embodiment in this specification is described by the way of progressive, identical similar portion between each embodiment
Divide mutually referring to what each embodiment was stressed is the difference with other embodiments.
Above-described the application embodiment does not constitute the restriction to the application protection domain.It is any new in this practicality
Modifications, equivalent substitutions and improvements made within the spirit and principle of type etc., should be included within the protection domain of the application.
Claims (9)
1. a kind of self-hold circuit of double-bus secondary voltage switching, it is characterised in that including：
Dc source (1)；
The first power circuit (2) and second being connected between the positive and negative electrode two ends of the dc source (1) is powered back
Road (3)；
It is sequentially connected in series the female isolation switch auxiliary switch contacts (4) of I in first power circuit (2) and the female two-position relays of I
Device (5)；
Be sequentially connected in series in second power circuit (3) the female isolation switch auxiliary switch contacts (6) of II and II mother two-positions after
Electrical equipment (7)；
First power circuit (2) includes the first energization sub-loop (21) and the second energization sub-loop (22)；
The female isolation switch auxiliary switch contacts (4) of the I include the female auxiliary switch normal opened contacts (41) of I and the female auxiliary switches of I are normal
Close contact (42)；
The female two-position relay (5) of the I include the female normally opened contacts (51) of the first I, the first actuation coil (52), the first involution line
(54), the first actuation coil normal opened contact (53) and the first involution coil normally closed contact (55) are enclosed, wherein, the first I is female
Normally opened contact (51) is synchro switch with the first actuation coil normal opened contact (53)；
Wherein, the female auxiliary switch normal opened contacts (41) of the I, the first involution coil normally closed contact (55) and the first actuation coil
(52) the first energization sub-loop (21) is serially connected with, the female auxiliary switch normally closed contacts (42) of the I, the first actuation coil are normally opened
Contact (53) and the first involution coil (54) are serially connected with the second energization sub-loop (22)；
Second power circuit (3) includes threeway electronic loop (31) and four-way electronic loop (32)；
The female isolation switch auxiliary switch contacts (6) of the II include the female auxiliary switch normal opened contacts (61) of II and the female auxiliary switches of II
Normally closed contact (62)；
The female two-position relay (7) of the II include the female normally opened contacts (71) of the first II, the second actuation coil (72), the second involution
Coil (74), the second actuation coil normal opened contact (73) and the second involution coil normally closed contact (75), wherein, the first II
Female normally opened contact (71) is synchro switch with the second actuation coil normal opened contact (73)；
Wherein, the female auxiliary switch normal opened contacts (61) of the II, the second involution coil normally closed contact (75) and the second actuation coil
(72) the threeway electronic loop (31) is serially connected with, the female auxiliary switch normally closed contacts (62) of the II, the second actuation coil are normal
Open contact (73) and the second involution coil (74) is serially connected with the four-way electronic loop (32).
2. the self-hold circuit of double-bus secondary voltage switching according to claim 1, it is characterised in that also include：
The I mothers for being in series and being in parallel with the female two-position relay (5) of the I with the female auxiliary switch normal opened contacts (41) of the I
Voltage indicator lamp (8)；And,
It is in series and is in parallel with the female two-position relay (7) of the II with the female auxiliary switch normal opened contacts (61) of the II
II mother's voltage indicator lamps (9).
3. the self-hold circuit of double-bus secondary voltage switching according to claim 1, it is characterised in that
The female two-position relay (5) of the I also include the female normally opened contacts (56) of the 2nd I, wherein, the female normally opened contacts of the 2nd I
(56) it is synchro switch with the first actuation coil normal opened contact (53)；
The female two-position relay (7) of the II also include the female normally opened contacts (76) of the 2nd II, wherein, the 2nd II is female normally opened tactile
Point (76) is synchro switch with the second actuation coil normal opened contact (73)；
The self-hold circuit also includes secondary voltage switching relay and acts warning circuit (10) simultaneously, and the secondary voltage is cut
Relay is changed while acting warning circuit (10) includes：
The 3rd power circuit (101) and the secondary voltage switching for being connected to the positive and negative electrode two ends of the dc source (1) are same
When action warning device (102)；
Wherein, the female normally opened contacts (56) of the 2nd I, the female normally opened contacts (76) of the 2nd II and secondary voltage switching
Warning device (102) is acted simultaneously to be serially connected with the 3rd power circuit (101).
4. the self-hold circuit of double-bus secondary voltage switching according to claim 3, it is characterised in that the secondary electricity
Crush-cutting is changed to be switched while acting alarm lamp (1021) while acting warning device (102) and including secondary voltage.
5. the self-hold circuit of double-bus secondary voltage switching according to claim 3, it is characterised in that also include：
Switch the female auxiliary switch normally closed contacts of I that action warning device (102) is electrically connected simultaneously with the secondary voltage temporarily short
Connection device (11)；And,
Switch the female auxiliary switch normally closed contacts of II that action warning device (102) is electrically connected simultaneously with the secondary voltage temporarily short
Connection device (12)；
Wherein, the female interim short-circuit devices of auxiliary switch normally closed contact (11) of the I are connected to the female auxiliary switch normally closed contacts of the I
(42) two ends, the female interim short-circuit device of auxiliary switch normally closed contact (12) of the II is connected to the II, and female auxiliary switch is normally closed connects
Point (62) two ends.
6. the self-hold circuit of double-bus secondary voltage switching according to claim 5, it is characterised in that also include：
It is serially connected with the first involution coil working instruction device (13) of the second energization sub-loop (22)；And,
It is serially connected with the second involution coil working instruction device (14) of the four-way electronic loop (32).
7. the self-hold circuit of double-bus secondary voltage switching according to claim 6, it is characterised in that
The female interim short-circuit device of auxiliary switch normally closed contact (11) of the I also with the first involution coil working instruction device
(13) electrically connect；
The female interim short-circuit device of auxiliary switch normally closed contact (12) of the II also with the second involution coil working instruction device
(14) electrically connect.
8. the self-hold circuit of double-bus secondary voltage switching according to claim 6, it is characterised in that
The first involution coil working instruction device (13) includes the first involution coil working indicator lamp (131)；
The second involution coil working instruction device (14) includes the second involution coil working indicator lamp (141).
9. a kind of double-bus secondary voltage switching circuit, it is characterised in that including：
The female voltage transformer secondary voltage bus (16) of I mother's voltage transformer secondary voltage bus (15), II, high-tension switch cabinet two
The self-sustaining electricity of double-bus secondary voltage switching any one of secondary voltage air switch (17) and claim 1 to 8
Road；Wherein,
The female voltage transformer secondary voltage bus (15) of the I passes through the first two electric loops (18) and the high-tension switch cabinets
Secondary voltage air switch (17) is electrically connected；
The female voltage transformer secondary voltage bus (16) of the II passes through the second two electric loops (19) and the high-voltage switch gears
Cabinet secondary voltage air switch (17) is electrically connected；
The female normally opened contacts (51) of the first I of I mother's two-position relay (5) are connected to described the first two times in the self-hold circuit
Electric loop (18)；
The female normally opened contacts (71) of the first II of II mother's two-position relay (7) are connected to the described 2nd 2 in the self-hold circuit
Secondary electric loop (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720325672.9U CN206611180U (en) | 2017-03-30 | 2017-03-30 | Double-bus secondary voltage switching circuit and its self-hold circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720325672.9U CN206611180U (en) | 2017-03-30 | 2017-03-30 | Double-bus secondary voltage switching circuit and its self-hold circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206611180U true CN206611180U (en) | 2017-11-03 |
Family
ID=60173345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720325672.9U Withdrawn - After Issue CN206611180U (en) | 2017-03-30 | 2017-03-30 | Double-bus secondary voltage switching circuit and its self-hold circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206611180U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106712017A (en) * | 2017-03-30 | 2017-05-24 | 山东钢铁股份有限公司 | Double-bus secondary voltage switching circuit and self-holding circuit thereof |
| CN111917106A (en) * | 2020-07-07 | 2020-11-10 | 广东电网有限责任公司 | Bus voltage parallel loop based on intelligent operation and maintenance |
-
2017
- 2017-03-30 CN CN201720325672.9U patent/CN206611180U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106712017A (en) * | 2017-03-30 | 2017-05-24 | 山东钢铁股份有限公司 | Double-bus secondary voltage switching circuit and self-holding circuit thereof |
| CN106712017B (en) * | 2017-03-30 | 2023-06-30 | 山东钢铁股份有限公司 | Double-bus secondary voltage switching circuit and self-holding circuit thereof |
| CN111917106A (en) * | 2020-07-07 | 2020-11-10 | 广东电网有限责任公司 | Bus voltage parallel loop based on intelligent operation and maintenance |
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