CN203301163U - Composite switch of 10-kV no-impact switched multi-group capacitor group - Google Patents
Composite switch of 10-kV no-impact switched multi-group capacitor group Download PDFInfo
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- CN203301163U CN203301163U CN2013203352855U CN201320335285U CN203301163U CN 203301163 U CN203301163 U CN 203301163U CN 2013203352855 U CN2013203352855 U CN 2013203352855U CN 201320335285 U CN201320335285 U CN 201320335285U CN 203301163 U CN203301163 U CN 203301163U
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Abstract
A composite switch of a 10-kV no-impact switched multi-group capacitor group is provided. The utility model relates to the 10-kV reactive compensation field, especially to a 10-kV composite switch grading multi-group switched capacitor group. Therefore, problems that a composite switch of the existing 10-kV switched reactive compensation capacitor group can not realize multi-group switching by one valve block and the single valve block can not work can be solved. The provided composite switch comprises a photoelectric receiving-transmitting module, a controller, a high-voltage silicon controlled rectifier valve block, a high-frequency pulse power supply, a pulse power-taking coil, a silicon controlled rectifier drive box, a valve block fault and zero-crossing detection main board, a three-phase vacuum circuit breaker, and N units; and each of the units includes two photoelectric receiving-transmitting modules, two three-phase vacuum contacts, a three-phase electric reactor, and a three-phase capacitor. The high-voltage silicon controlled rectifier valve block is used for realizing zero-crossing switching of the three-phase capacitors connected in series with the electric reactors and the whole switching process is free of impact and is free of flowing current, thereby substantially improving the service life of the three-phase capacitors and the mechanical switch and reducing the influences of the three-phase capacitors on the 10-kV system. The provided composite switch is mainly applied to the 10-kV system.
Description
Technical field
The utility model relates to 10kV reactive power compensation field, relates in particular to the classification of 10kV combination switch and organizes opening-closing capacitor bank more.
Background technology
Along with the increase of power system load, to the also increase day by day of demand of reactive power.Obviously these a large amount of reactive powers, if engine provides and grows Distance Transmission is unreasonable, are also impossible usually.Because reactive power transmission in electrical network can cause via net loss and receiving end voltage, descend, therefore a large amount of reactive powers is transmitted and utilization rate of electrical is reduced greatly and have a strong impact on power supply quality in electrical network.At the appropriate location of electrical network installing reactive power compensator, become the necessary means that meets the electric network reactive-load demand.Reactive power compensation, to improving power factor, ensures taking full advantage of of electric network active power, reduces line loss, improves power supplying efficiency and the quality of voltage of electric power system, and the cost that reduces power distribution circuit is significant.In recent years, reactive power compensation is more and more extensively admitted by people the importance of electric power system.In electric substation, the switching of compensation condenser all adopts common switch at present, can not realize intelligent operating passing zero, therefore capacitor switching is to system, to capacitor body, all produce larger transient state surge voltage and electric current to fling-cut switch, and the safe operation of grid equipment, compensation condenser, fling-cut switch is caused to great harm.Theoretical research, actual test and operating experience shows, frequently the non-operating passing zero of capacitor can cause the overcurrent blast of reduction, the capacitor of switch life, to the interference of some responsive power consumption equipments of electrical network.
along with frequency converter in system, rectifying installation, increasing of the nonlinear-loads such as arc furnace, the harmonic pollution of electric power system is also more and more serious, the reactive-load compensation equipment of being realized by capacitor separately moves and becomes more and more dangerous in system, harmonic wave can cause resonance overvoltage or the overcurrent of compensation condenser group, cause burning or the overvoltage fault of other power consumption equipment of system of capacitor, the unique scheme that addresses this is that at present is exactly at the humorous wave reactor of the capacitor branch road jumbo inhibition of series connection, and suppress the life-span that sealing in of humorous wave reactor greatly reduces the high pressure fling-cut switch, when excision compensation branch road, can cause arcing to burn, so high-voltage thyristor valve group switching string has the capacitor that suppresses humorous wave reactor to consist of the most reliable fling-cut switch at present, but the price comparison costliness that high-voltage thyristor valve group is present, while dividing many group switchings, cost is very high, so the high pressure combination switch becomes optimum selection.
In low-pressure system, combination switch has had a large amount of uses, and the structure of combination switch is that the course of action of combination switch is at the bidirectional triode thyristor of the two ends of a contactor low capacity in parallel:
During input, the first passing zero trigger of bidirectional triode thyristor, then contactor adhesive, the shock-free input process that completes;
During excision, drive signal for the driving box of bidirectional triode thyristor, allow the bidirectional triode thyristor conducting, and then give the contactor cut-off signal, after contactor disconnected, the excision silicon controlled drove signal, without the excision process that completes of arcing.
The utility model content
The utility model is can't realize that for the combination switch that solves existing 10kV switching compensation capacitors a valve group is organized switching more and the valve group can not singly be organized the problem of work, thereby has proposed a kind of 10kV without the combination switch that impacts switching multiple unit capacitor group.
10kV is without the combination switch that impacts switching multiple unit capacitor group, and it comprises that the energy coil is got in the first optoelectronic transceiver module, controller, high-voltage thyristor valve group, high frequency pulse power supply, pulse, controllable silicon drives box, valve group fault and zero passage detection mainboard, a three-phase vacuum breaker and N unit;
Described each unit comprises the second optoelectronic transceiver module, the 3rd optoelectronic transceiver module, 2 three-phase vacuum contactors, 1 three-phase reactor and 1 three-phase capacitor;
The first control signal output of described controller is connected with the control signal input of the first optoelectronic transceiver module, the first status signal input of this controller is connected with the status signal output of the first optoelectronic transceiver module, and the control signal output of described the first optoelectronic transceiver module is connected with the control end of three-phase vacuum breaker;
The second control signal output of described controller is connected with the control signal input of the second optoelectronic transceiver module, and the second status signal input of this controller is connected with the status signal output of the second optoelectronic transceiver module,
The control signal output of described the second optoelectronic transceiver module is connected with the control end of the first three-phase vacuum contactor;
The 3rd control signal output of described controller is connected with the control signal input of the 3rd optoelectronic transceiver module, the third state signal input part of this controller is connected with the status signal output of the 3rd optoelectronic transceiver module, and the control signal output of described the 3rd optoelectronic transceiver module is connected with the control end of the second three-phase vacuum contactor;
the triggering signal output of described controller is connected with the triggering signal input of high frequency pulse power supply, the fault-signal input of this controller is connected with the fault-signal output of high frequency pulse power supply, the electric power signal output of described high frequency pulse power supply is connected with the electric power signal input of valve group fault and zero passage detection mainboard, the fault-signal output of described valve group fault and zero passage detection mainboard is connected with the valve group fault-signal input of controller, the zero cross signal output of described valve group fault and zero passage detection mainboard is connected with the zero cross signal input of controller, the control signal output of described high-voltage thyristor valve group is connected with the control signal input of valve group fault and zero passage detection mainboard, described high frequency pulse power supply passes pulse by high pressure silica gel line and gets the energy coil, the end that the energy coil is got in described pulse is connected with the signal input part that controllable silicon drives box, the driving signal output part that described controllable silicon drives box is connected with the driving signal input of high-voltage thyristor valve group
The three-phase input end of described high-voltage thyristor valve group is connected with an end of the first three-phase vacuum contactor with an end of three-phase vacuum breaker simultaneously, and the control end of described three-phase vacuum breaker is connected with the control signal output of the first optoelectronic transceiver module,
The three-phase output end of described high-voltage thyristor valve group is connected with an end of the second three-phase vacuum contactor, the other end of described the first three-phase vacuum contactor is connected with an end of three-phase reactor and is connected with the other end of the second three-phase vacuum contactor simultaneously, and the other end of described three-phase reactor is connected with three-phase capacitor.
Described N is the positive integer more than or equal to 2.
Described high-voltage thyristor valve group is two-phase high-voltage thyristor valve group, and described two-phase high-voltage thyristor valve group comprises A phase and C phase.
By the setting of controller inner parameter, 10kV described in the utility model can be operated in " combination switch state ", " mechanical switch state ", " group switch state " three kinds of mode of operations without the combination switch that impacts switching multiple unit capacitor group.
(1) combination switch state
When Everything is fine, System Reactive Power fluctuation was not very fast the time, is generally operational in this state.
Take one group of three-phase capacitor as example, introduce three-phase capacitor and drop into and the excision process:
three-phase capacitor drops into process: controller is first sent out and is controlled voted signal to three-phase vacuum breaker, after the three-phase vacuum breaker closure, the switching signal of controller judgement three-phase vacuum breaker, if controller does not receive the switching signal of the first optoelectronic transceiver module, controller sends three-phase vacuum breaker tripping fault-signal, if controller receives the switching signal of the first optoelectronic transceiver module, controller is given the second three-phase vacuum contactor switching signal, if controller does not receive the switching signal of the second three-phase vacuum contactor, controller is sent out the second three-phase vacuum contactor tripping fault-signal, if controller receives the switching signal of the second three-phase vacuum contactor, controller detects zero cross signal and the valve group fault-signal of the high-voltage thyristor valve group that valve group fault and zero passage detection mainboard send, if zero cross signal do not detected, controller newspaper synchronizing signal fault, if valve group fault-signal detected, controller newspaper valve group fault, if controller detects the zero cross signal of valve group fault and zero passage detection mainboard, controller is to the high frequency pulse power supply triggering signal, and whether the detection high frequency pulse power supply has fault-signal, if high frequency pulse power supply has fault-signal, the controller frequently pulse power fault-signal of offering a high price, if high frequency pulse power supply does not have fault-signal, high frequency pulse power supply is got the energy supply of energy coil by high pressure silica gel line to pulse, and pulse is got and can by controllable silicon, be triggered the conducting of box driving high-voltage thyristor valve group by coil, three-phase capacitor is put in the 10kV system, controller is given the first three-phase vacuum contactor switching signal, if controller does not receive the switching signal that the second optoelectronic transceiver module sends, controller is sent out the first three-phase vacuum contactor tripping fault-signal, if controller receives the switching signal that the second optoelectronic transceiver module sends, controller stops to the high frequency pulse power supply triggering signal, high-voltage thyristor valve group cut-off conducting, controller is given the second three-phase vacuum contactor sub-gate signal, if controller does not receive the sub-gate signal that the 3rd optoelectronic transceiver module sends, controller is sent out the second three-phase vacuum contactor tripping fault-signal, this has just completed the input process of one group of three-phase capacitor.
Three-phase capacitor excision process: controller detects the opening and closing state signal of the first three-phase vacuum contactor by the second optoelectronic transceiver module,
When controller detected the first three-phase vacuum contactor and is in "on" position, controller was given the second three-phase vacuum contactor switching signal,
Controller detects zero cross signal and the valve group fault-signal that valve group fault and zero passage detection mainboard send, and the zero cross signal of valve group fault and zero passage detection mainboard when controller, do not detected, controller newspaper synchronizing signal fault; The valve group fault-signal of valve group fault and zero passage detection mainboard when controller, detected, controller newspaper valve group fault;
After the zero cross signal of valve group fault and zero passage detection mainboard when controller, being detected, controller is to the high frequency pulse power supply triggering signal, and detect high frequency pulse power supply whether fault-signal is arranged, if controller detects high frequency pulse power supply, fault-signal is arranged, controller newspaper power failure signal.if controller detects high frequency pulse power supply, there is no fault-signal, high frequency pulse power supply is got the energy supply of energy coil by high pressure silica gel line to pulse, and pulse is got and can by controllable silicon, be triggered the conducting of box driving high-voltage thyristor valve group by coil, controller is given the first three-phase vacuum contactor sub-gate signal, if controller does not receive the sub-gate signal that the second optoelectronic transceiver module sends, controller is sent out the first three-phase vacuum contactor tripping fault-signal, if controller receives the sub-gate signal that the second optoelectronic transceiver module sends, controller stops to the high frequency pulse power supply triggering signal, high-voltage thyristor valve group cut-off conducting, controller is given the second three-phase vacuum contactor sub-gate signal, if controller does not receive the sub-gate signal that the 3rd optoelectronic transceiver module sends, controller is sent out the second three-phase vacuum contactor tripping fault-signal, to sum up just completed the excision process of one group of three-phase capacitor.
(2) mechanical switch state
Take one group of three-phase capacitor as example, introduce three-phase capacitor and drop into and the excision process:
When controller detects valve group fault-signal, synchronous fault or power failure, controller is controlled the three-phase vacuum breaker closure, after the three-phase vacuum breaker closure, the switching signal of controller judgement three-phase vacuum breaker, if controller does not receive the switching signal that the first optoelectronic transceiver module sends, controller is sent out three-phase vacuum breaker tripping fault-signal;
If controller receives the switching signal that the first optoelectronic transceiver module sends,
During input, controller is given the first three-phase vacuum contactor switching signal, if controller does not receive the switching signal that the second optoelectronic transceiver module sends, controller is sent out the second three-phase vacuum contactor tripping fault-signal, if controller receives the switching signal that the second optoelectronic transceiver module sends, the process that drops into is complete;
During excision, controller is given the first three-phase vacuum contactor sub-gate signal, if controller does not receive the sub-gate signal that the second optoelectronic transceiver module sends, controller is sent out the second three-phase vacuum contactor tripping fault-signal, if controller receives the sub-gate signal that the second optoelectronic transceiver module sends, the process of excising is complete.
The mechanical switch state, be only applicable to system emergency.
(3) group switch state
The load or burden without work that very fast fluctuation is arranged when system, all the other all when normal, 10kV described in the utility model is generally operational in the group switch state without the combination switch that impacts switching multiple unit capacitor group.
The switching process of group switch state, consistent with the switching process of combination switch state, be exactly the load or burden without work for rapid fluctuations, it is idle that controller detects basis, with combination switch operating state pattern, put in the 10kV system basis is idle, stay one group of three-phase capacitor to be operated in the state of thyristor throw-cut, follow the tracks of fast the load or burden without work of fluctuation, assurance 10kV system is only mended, and power factor is high;
The state of thyristor throw-cut is take one group of three-phase capacitor as example,
Controller is put into other group three-phase capacitors in the 10kV system with the course of action of combination switch state, surplus one group of three-phase capacitor is operated in the thyristor throw-cut state, after controller detects the switching signal of three-phase vacuum breaker, the 3rd optoelectronic transceiver module is given the second three-phase vacuum contactor switching signal, if controller does not receive the switching signal that the 3rd optoelectronic transceiver module sends, controller is sent out the second three-phase vacuum contactor tripping fault-signal;
If controller receives the switching signal that the 3rd optoelectronic transceiver module sends, controller detects zero cross signal and the valve group fault-signal that valve group fault and zero passage detection mainboard send, if controller does not detect the zero cross signal that valve group fault and zero passage detection mainboard send, controller newspaper synchronizing signal fault; If controller detects that valve group fault and zero passage detection mainboard send, valve group fault-signal, controller newspaper valve group fault are arranged; After controller detects the zero cross signal that valve group fault and zero passage detection mainboard send, controller is to the high frequency pulse power supply triggering signal, and whether the detection high frequency pulse power supply has fault-signal, if high frequency pulse power supply has fault-signal, controller newspaper power failure signal, if high frequency pulse power supply does not have fault-signal, high frequency pulse power supply is got the energy supply of energy coil by high pressure silica gel line to pulse, pulse is got and can by controllable silicon, be triggered controlled silicon conducting in box driving high-voltage thyristor valve group by coil, high-voltage thyristor valve group conducting
One group of three-phase capacitor is put in the 10kV system, and during excision, controller stops to the high frequency pulse power supply triggering signal, high-voltage thyristor valve group cut-off conducting, and one group of three-phase capacitor is from excising the 10kV system; The switching process completes in the time at 20ms.
10kV is operated in the requirement of the solution 10kV System Reactive Power compensation that combination switch state and comprehensive state can be comprehensive without the combination switch that impacts switching multiple unit capacitor group, the switching process is without impact, no-flashy-flow, increase the life-span of three-phase capacitor and the life-span of mechanical switch, improved the reliability of system power supply.
The beneficial effect that the utility model brings is, the utility model proposes a kind of 10kV without the combination switch that impacts switching multiple unit capacitor group, and this combination switch has realized that a valve group organizes switching and the single group work of valve group more; Three-phase capacitor switching process, without impact, no-flashy-flow, in the life-span of greatly having improved three-phase capacitor and mechanical switch, has reduced the impact of switching three-phase capacitor on system, the reliability of raising power supply; In addition, 10kV described in the utility model can be operated under " combination switch state ", " mechanical switch state " and " group switch state " three kinds of mode of operations without the combination switch that impacts switching multiple unit capacitor group, the compensation of realization to various load or burden without work, but mend, power factor is high, and cost performance is high.
The accompanying drawing explanation
Fig. 1 is the structural representation of 10kV described in the utility model without the combination switch that impacts switching multiple unit capacitor group.
Embodiment
Embodiment one: present embodiment is described referring to Fig. 1, the described 10kV of present embodiment is without the combination switch that impacts switching multiple unit capacitor group, and it comprises that energy coil 5 is got in the first optoelectronic transceiver module 1-1, controller 3, high-voltage thyristor valve group 2, high frequency pulse power supply 4, pulse, controllable silicon drives box 6, valve group fault and zero passage detection mainboard 7, three-phase vacuum breaker 8 and N unit;
Described each unit comprises the second optoelectronic transceiver module 1-2, the 3rd optoelectronic transceiver module 1-3,2 three-phase vacuum contactors, 1 three-phase reactor and 1 three-phase capacitor;
The first control signal output of described controller 3 is connected with the control signal input of the first optoelectronic transceiver module 1-1, the first status signal input of this controller 3 is connected with the status signal output of the first optoelectronic transceiver module 1-1, and the control signal output of described the first optoelectronic transceiver module 1-1 is connected with the control end of three-phase vacuum breaker 8;
The second control signal output of described controller 3 is connected with the control signal input of the second optoelectronic transceiver module 1-2, the second status signal input of this controller 3 is connected with the status signal output of the second optoelectronic transceiver module 1-2, and the control signal output of described the second optoelectronic transceiver module 1-2 is connected with the control end of the first three-phase vacuum contactor 9-1;
The 3rd control signal output of described controller 3 is connected with the control signal input of the 3rd optoelectronic transceiver module 1-3, the third state signal input part of this controller 3 is connected with the status signal output of the 3rd optoelectronic transceiver module 1-3, and the control signal output of described the 3rd optoelectronic transceiver module 1-3 is connected with the control end of the second three-phase vacuum contactor 9-2;
the triggering signal output of described controller 3 is connected with the triggering signal input of high frequency pulse power supply 4, the fault-signal input of this controller 3 is connected with the fault-signal output of high frequency pulse power supply 4, the electric power signal output of described high frequency pulse power supply 4 is connected with the electric power signal input of valve group fault and zero passage detection mainboard 7, the fault-signal output of described valve group fault and zero passage detection mainboard 7 is connected with the valve group fault-signal input of controller 3, the zero cross signal output of described valve group fault and zero passage detection mainboard 7 is connected with the zero cross signal input of controller 3, the control signal output of described high-voltage thyristor valve group 2 is connected with the control signal input of valve group fault and zero passage detection mainboard 7, described high frequency pulse power supply 4 passes pulse by high pressure silica gel line and gets energy coil 5, the end that energy coil 5 is got in described pulse is connected with the signal input part that controllable silicon drives box 6, the driving signal output part that described controllable silicon drives box 6 is connected with the driving signal input of high-voltage thyristor valve group 2
The three-phase input end of described high-voltage thyristor valve group 2 is connected with the end of the first three-phase vacuum contactor 9-1 with an end of three-phase vacuum breaker 8 simultaneously, the control end of described three-phase vacuum breaker 8 is connected with the control signal output of the first optoelectronic transceiver module 1-1
The three-phase output end of described high-voltage thyristor valve group 2 is connected with the end of the second three-phase vacuum contactor 9-2, the other end of described the first three-phase vacuum contactor 9-1 is connected with an end of three-phase reactor and is connected with the other end of the second three-phase vacuum contactor 9-2 simultaneously, and the other end of described three-phase reactor is connected with an end of three-phase capacitor.
In present embodiment, described three-phase capacitor is for reactive power compensation, and described three-phase reactor is for suppressing harmonic signal.
Embodiment two: referring to Fig. 1, present embodiment is described, present embodiment and the described 10kV of embodiment one be without the difference of the combination switch that impacts switching multiple unit capacitor group, and described N is the positive integer more than or equal to 2.
Embodiment three: present embodiment is described referring to Fig. 1, present embodiment and embodiment one or the described 10kV of embodiment two are without the difference of the combination switch that impacts switching multiple unit capacitor group, described high-voltage thyristor valve group 2 is two-phase high-voltage thyristor valve group, and described two-phase high-voltage thyristor valve group comprises A phase and C phase.
Claims (3)
1.10kV without the combination switch that impacts switching multiple unit capacitor group, it is characterized in that, it comprises that energy coil (5) is got in the first optoelectronic transceiver module (1-1), controller (3), high-voltage thyristor valve group (2), high frequency pulse power supply (4), pulse, controllable silicon drives box (6), valve group fault and zero passage detection mainboard (7), three-phase vacuum breaker (8) and N unit;
Described each unit comprises the second optoelectronic transceiver module (1-2), the 3rd optoelectronic transceiver module (1-3), 2 three-phase vacuum contactors, 1 three-phase reactor and 1 three-phase capacitor;
The first control signal output of described controller (3) is connected with the control signal input of the first optoelectronic transceiver module (1-1), the first status signal input of this controller (3) is connected with the status signal output of the first optoelectronic transceiver module (1-1), and the control signal output of described the first optoelectronic transceiver module (1-1) is connected with the control end of three-phase vacuum breaker (8);
The second control signal output of described controller (3) is connected with the control signal input of the second optoelectronic transceiver module (1-2), the second status signal input of this controller (3) is connected with the status signal output of the second optoelectronic transceiver module (1-2), and the control signal output of described the second optoelectronic transceiver module (1-2) is connected with the control end of the first three-phase vacuum contactor (9-1);
The 3rd control signal output of described controller (3) is connected with the control signal input of the 3rd optoelectronic transceiver module (1-3), the third state signal input part of this controller (3) is connected with the status signal output of the 3rd optoelectronic transceiver module (1-3), and the control signal output of described the 3rd optoelectronic transceiver module (1-3) is connected with the control end of the second three-phase vacuum contactor (9-2);
the triggering signal output of described controller (3) is connected with the triggering signal input of high frequency pulse power supply (4), the fault-signal input of this controller (3) is connected with the fault-signal output of high frequency pulse power supply (4), the electric power signal output of described high frequency pulse power supply (4) is connected with the electric power signal input of zero passage detection mainboard (7) with valve group fault, the fault-signal output of described valve group fault and zero passage detection mainboard (7) is connected with the valve group fault-signal input of controller (3), the zero cross signal output of described valve group fault and zero passage detection mainboard (7) is connected with the zero cross signal input of controller (3), the control signal output of described high-voltage thyristor valve group (2) is connected with the control signal input of zero passage detection mainboard (7) with valve group fault, described high frequency pulse power supply (4) passes pulse by high pressure silica gel line and gets energy coil (5), the end that energy coil (5) is got in described pulse is connected with the signal input part that controllable silicon drives box (6), the driving signal output part that described controllable silicon drives box (6) is connected with the driving signal input of high-voltage thyristor valve group (2)
The three-phase input end of described high-voltage thyristor valve group (2) is connected with an end of the first three-phase vacuum contactor (9-1) with an end of three-phase vacuum breaker (8) simultaneously,
The three-phase output end of described high-voltage thyristor valve group (2) is connected with an end of the second three-phase vacuum contactor (9-2), the other end of the first three-phase vacuum contactor (9-1) is connected with an end of three-phase reactor and is connected with the other end of the second three-phase vacuum contactor (9-2) simultaneously, and the other end of described three-phase reactor is connected with an end of three-phase capacitor.
2. 10kV according to claim 1, without the combination switch that impacts switching multiple unit capacitor group, is characterized in that, described N is the positive integer more than or equal to 2.
3. 10kV according to claim 1 and 2, without the combination switch that impacts switching multiple unit capacitor group, is characterized in that, described high-voltage thyristor valve group (2) is two-phase high-voltage thyristor valve group, and described two-phase high-voltage thyristor valve group comprises A phase and C phase.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203352855U CN203301163U (en) | 2013-06-09 | 2013-06-09 | Composite switch of 10-kV no-impact switched multi-group capacitor group |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203352855U CN203301163U (en) | 2013-06-09 | 2013-06-09 | Composite switch of 10-kV no-impact switched multi-group capacitor group |
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| CN203301163U true CN203301163U (en) | 2013-11-20 |
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| CN2013203352855U Expired - Lifetime CN203301163U (en) | 2013-06-09 | 2013-06-09 | Composite switch of 10-kV no-impact switched multi-group capacitor group |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103269081A (en) * | 2013-06-09 | 2013-08-28 | 哈尔滨威瀚电气设备股份有限公司 | Composite switch for 10KV non-impact switch multi-capacitor bank |
-
2013
- 2013-06-09 CN CN2013203352855U patent/CN203301163U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103269081A (en) * | 2013-06-09 | 2013-08-28 | 哈尔滨威瀚电气设备股份有限公司 | Composite switch for 10KV non-impact switch multi-capacitor bank |
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