CN202817716U - Three-phase automatic switch - Google Patents
Three-phase automatic switch Download PDFInfo
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- CN202817716U CN202817716U CN 201220516983 CN201220516983U CN202817716U CN 202817716 U CN202817716 U CN 202817716U CN 201220516983 CN201220516983 CN 201220516983 CN 201220516983 U CN201220516983 U CN 201220516983U CN 202817716 U CN202817716 U CN 202817716U
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Abstract
The utility model provides a three-phase automatic switch. The three-phase automatic switch comprises a switch housing, a three-phase switch arranged inside the switch housing, a switch housing upper cover clamping the switch housing, an electronic assembly plate and an automatic switch control circuit arranged on the electronic assembly plate. The three-phase switch comprises a switching trip gear, an operation handle connected with the switching trip gear, a zero-sequence current transformer, three annular voltage transformers, three-phase switch moving and static contacts and a switch housing base arranged on the bottom of the switch housing. The automatic switch control circuit comprises a power supply circuit, an earth leakage protection circuit and a three-And-Gate circuit. The three-phase automatic switch provided by the utility model has the advantages of scientific design, strong practicality, safety, reliability, low production cost and long service lifetime.
Description
Technical field
The utility model relates to a kind of threephase switch, specifically, related to a kind of can be from the three-phase automatic switch of dynamic circuit breaker lock.
Background technology
The three-phase automatic switch is widely used in threephase motor or the three-phase branch circuit as a kind of low voltage equipment, makes the frequent break-make of frequent starting not or circuit, and in service therebetween only have short circuit, an overcurrent protection.And actual motion also needs to increase open-phase protection, leakage protection equipment in the threephase motor circuit, causes protective circuit installation wiring complicated.Afterwards, there was the people in the nonstandard three-phase automatic switch of DZ15 housing, to increase creepage protection function, yet; in actual motion, because the portions of electronics element often is operated under the 380V voltage between lines, cause the portions of electronics element frequently to burn; the reliability extreme difference does not reach the purpose of anticipation.
In order to solve the problem of above existence, people are seeking a kind of desirable technical solution always.
Summary of the invention
The purpose of this utility model is for the deficiencies in the prior art, thus provide a kind of design science, practical, safe and reliable, production cost is low and the three-phase automatic switch of long service life.
To achieve these goals, the technical scheme that the utility model adopts is: a kind of three-phase automatic switch, and it comprises switch case, be arranged on threephase switch, the switch case loam cake, the electric sub-member plate that engage with described switch case in the described switch case and be arranged on automatic switch control circuit on the described electric sub-member plate;
Wherein, described threephase switch comprises the divide-shut brake trip gear, zero sequence current mutual inductor, three annular voltage transformers and threephase switch dynamic/static contact, described divide-shut brake trip gear is connected with three short circuit overcurrent releases and an assistant release, described assistant release comprises assistant release coil TQ, one end of three described short circuit overcurrent releases connects respectively an end of described threephase switch dynamic/static contact, the other end of described threephase switch dynamic/static contact is as power access end, the common end that connects described zero sequence current mutual inductor primary side of the other end of three described short circuit overcurrent releases, the other end of described zero sequence current mutual inductor primary side connects respectively an end of three described annular voltage transformer primary sides, the other end of three described annular voltage transformer primary sides is respectively as power output end, one end ground connection of described zero sequence current mutual inductor secondary side, an end of three described annular voltage transformer secondary sides links together;
Described automatic switch control circuit comprises power circuit, leakage protection circuit and three AND circuit, wherein, described power circuit comprises the three-phase bridge rectification diode, described three-phase bridge rectification diode comprises diode V1, diode V2, diode V3, diode V4, diode V5 and diode V6, the anode of described diode V1, the anode of described diode V2, the anode of described diode V3 connects the other end of three described annular voltage transformer secondary sides successively, the negative electrode of described diode V4, the negative electrode of described diode V5, the negative electrode of described diode V6 connects the other end of three described annular voltage transformer secondary sides successively, the negative electrode of described diode V1, the negative electrode of described diode V2, the negative electrode of described diode V3 links together as power output end VCC, the anode of described diode V4, the anode of described diode V5, the anode of described diode V6 is ground connection respectively;
Described leakage protection circuit comprises adjustable resistance R6, unidirectional thyristor VT2, capacitor C 5, assistant release coil TQ and test button AN1, the end of described adjustable resistance R6 is connected with the other end of described zero sequence current mutual inductor secondary side, the control utmost point of the other end of described adjustable resistance R6 and described unidirectional thyristor VT2 be connected an end of capacitor C 5 and be connected, the negative electrode of the other end of described capacitor C 5 and described unidirectional thyristor VT2 is ground connection respectively, the anode of described unidirectional thyristor VT2 respectively with the end of described assistant release coil TQ be connected the end of test button AN1 and be connected, the other end of described assistant release coil TQ is connected with described power output end VCC, and the other end of described test button AN1 connects the negative electrode of described unidirectional thyristor VT2;
Described three with the door operating circuit comprise rectifier diode V7, rectifier diode V8, rectifier diode V9, resistance R 1, resistance R 2, resistance R 3, resistance R 4, resistance R 5, electrolytic capacitor C1, electrolytic capacitor C2, electrolytic capacitor C3, electrolytic capacitor C4, triode V10, triode V11, triode V12 and single-phase thyristor VT1, wherein, the anode of described rectifier diode V7, the anode of described rectifier diode V8, the anode of described rectifier diode V9 connects the other end of three described annular voltage transformer secondary sides successively, the negative electrode of described rectifier diode V7 is connected with an end of described resistance R 1, the positive pole of the other end of described resistance R 1 and described electrolytic capacitor C1 be connected the base stage of triode V10 and be connected, the minus earth of described electrolytic capacitor C1, the negative electrode of described rectifier diode V8 is connected with an end of described resistance R 2, the positive pole of the other end of described resistance R 2 and described electrolytic capacitor C2 be connected the base stage of triode V11 and be connected, the minus earth of described electrolytic capacitor C2, the negative electrode of described rectifier diode V9 is connected with an end of described resistance R 3, the positive pole of the other end of described resistance R 3 and described electrolytic capacitor C3 be connected the base stage of triode V12 and be connected, the minus earth of described electrolytic capacitor C3, the collector electrode of described triode V10 is connected with an end of described resistance R 4, the other end of described resistance R 4 is connected with described power output end VCC, the collector electrode of described triode V11 is connected with the emitter of described triode V10, the collector electrode of described triode V12 is connected with the emitter of described triode V11, the grounded emitter of described triode V12, one end of described resistance R 5 is connected with the collector electrode of described triode V10, the other end of described resistance R 5 is connected with the positive pole of described electrolytic capacitor C4, the minus earth of described electrolytic capacitor C4, the positive pole of described electrolytic capacitor C4 is connected with the control utmost point of described single-phase thyristor VT1, the anode of described single-phase thyristor VT1 is connected the minus earth of described single-phase thyristor VT1 with the end of described assistant release coil TQ.
Based on above-mentioned, cover on the described switch case and be provided with operating grip, described operating grip bottom is connected with described divide-shut brake trip gear.
Based on above-mentioned, be provided with three phase connection on the described switch case, the other end of described threephase switch dynamic/static contact connects described three phase connection, described switch case bottom is provided with the switch case base, be provided with three-phase terminal on the described switch case base, the other end of three described annular voltage transformer primary sides connects respectively described three-phase terminal.
Based on above-mentioned, cover on the described switch case and be provided with the test button, described test button is connected with described test button AN1.
Based on above-mentioned, cover on the described switch case and be provided with transparent windows.
The relative prior art of the utility model has substantive distinguishing features and progress, specifically, the utility model is different with traditional threephase switch, it increases the automatic switch control circuit, described automatic switch control circuit comprises power circuit, leakage protection circuit and three AND circuit, when short circuit occurring, electric leakage, during the faults such as phase shortage, described automatic switch control circuit control divide-shut brake trip gear, three short circuit overcurrent releases and an assistant release action, finish the disconnected lock of threephase switch, greatly improved the switch fail safe, simultaneously, efficiently solve the increase open-phase protection, leakage protection equipment causes protective circuit that the complicated problem of wiring is installed; It has design science, practical, safe and reliable, production cost is low and the advantage of long service life.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structural representation of described switch case loam cake.
Fig. 3 is the schematic diagram of automatic switch control circuit described in the utility model.
Embodiment
Below by embodiment, the technical solution of the utility model is described in further detail.
Such as Fig. 1, Fig. 2 and shown in Figure 3, a kind of three-phase automatic switch, it comprises switch case 1, be arranged on threephase switch, the switch case loam cake 2, the electric sub-member plate 4 that engage with described switch case 1 in the described switch case 1 and be arranged on automatic switch control circuit on the described electric sub-member plate 4;
Wherein, described threephase switch comprises divide-shut brake trip gear 5, zero sequence current mutual inductor 6, three annular voltage transformers 7 and threephase switch dynamic/static contact 52, described divide-shut brake trip gear 5 is connected with three short circuit overcurrent releases 51 and an assistant release 53, described assistant release 53 comprises assistant release coil TQ, one end of three described short circuit overcurrent releases 51 connects respectively an end of described threephase switch dynamic/static contact 52, the other end of described threephase switch dynamic/static contact 52 is as power access end, the common end that connects described zero sequence current mutual inductor 6 primary sides of the other end of three described short circuit overcurrent releases 51, the other end of described zero sequence current mutual inductor 6 primary sides connects respectively an end of three described annular voltage transformer 7 primary sides, the other end of three described annular voltage transformer 7 primary sides is respectively as power output end, one end ground connection of described zero sequence current mutual inductor 6 secondary sides, an end of three described annular voltage transformer 7 secondary sides links together;
Described automatic switch control circuit comprises power circuit, leakage protection circuit and three AND circuit, wherein, described power circuit comprises the three-phase bridge rectification diode, described three-phase bridge rectification diode comprises diode V1, diode V2, diode V3, diode V4, diode V5 and diode V6, wherein, three described annular voltage transformer 7 second siding rings are respectively coil PT1, coil PT2 and coil PT3, the end of described coil PT1, the end of coil PT2 and the end of coil PT3 link together, the anode of described diode V1, the negative electrode of described diode V4 is connected with the other end of described coil PT3, the anode of described diode V2, the negative electrode of described diode V5 is connected with the other end of described coil PT2, the anode of described diode V3, the negative electrode of described diode V6 is connected with the other end of described coil PT1, be connected with the other end of described coil PT3, the negative electrode of described diode V1, the negative electrode of described diode V2, the negative electrode of described diode V3 links together as power output end VCC, the anode of described diode V4, the anode of described diode V5, the anode of described diode V6 is ground connection respectively;
Described leakage protection circuit comprises adjustable resistance R6, unidirectional thyristor VT2, capacitor C 5, assistant release coil TQ and test button AN1, described zero sequence current mutual inductor second siding ring is coil CCL1, described coil CCL1 one end ground connection, the end of described adjustable resistance R6 is connected with the other end of described coil CCL1, the control utmost point of the other end of described adjustable resistance R6 and described unidirectional thyristor VT2 be connected an end of capacitor C 5 and be connected, the minus earth of the other end of described capacitor C 5 and described unidirectional thyristor VT2, the anode of described unidirectional thyristor VT2 respectively with the end of described assistant release coil TQ be connected the end of test button AN1 and be connected, the other end of described assistant release coil TQ is connected with described power output end VCC, and the other end of described test button AN1 connects the negative electrode of described unidirectional thyristor VT2;
Described three with the door operating circuit comprise rectifier diode V7, rectifier diode V8, rectifier diode V9, resistance R 1, resistance R 2, resistance R 3, resistance R 4, resistance R 5, electrolytic capacitor C1, electrolytic capacitor C2, electrolytic capacitor C3, electrolytic capacitor C4, triode V10, triode V11, triode V12 and single-phase thyristor VT1, wherein, the anode of described rectifier diode V7, the anode of described rectifier diode V8, the anode of described rectifier diode V9 connects respectively the other end of three described annular voltage transformer secondary sides, the negative electrode of described rectifier diode V7 is connected with an end of described resistance R 1, the positive pole of the other end of described resistance R 1 and described electrolytic capacitor C1 be connected the base stage of triode V10 and be connected, the minus earth of described electrolytic capacitor C1, the negative electrode of described rectifier diode V8 is connected with an end of described resistance R 2, the positive pole of the other end of described resistance R 2 and described electrolytic capacitor C2 be connected the base stage of triode V11 and be connected, the minus earth of described electrolytic capacitor C2, the negative electrode of described rectifier diode V9 is connected with an end of described resistance R 3, the positive pole of the other end of described resistance R 3 and described electrolytic capacitor C3 be connected the base stage of triode V12 and be connected, the minus earth of described electrolytic capacitor C3, the collector electrode of described triode V10 is connected with an end of described resistance R 4, the other end of described resistance R 4 is connected with described power output end VCC, the collector electrode of described triode V11 is connected with the emitter of described triode V10, the collector electrode of described triode V12 is connected with the emitter of described triode V11, the grounded emitter of described triode V12, one end of described resistance R 5 is connected with the collector electrode of described triode V10, the other end of described resistance R 5 is connected with the positive pole of described electrolytic capacitor C4, the minus earth of described electrolytic capacitor C4, the positive pole of described electrolytic capacitor C4 is connected with the control utmost point of described single-phase thyristor VT1, the anode of described single-phase thyristor VT1 is connected the minus earth of described single-phase thyristor VT1 with the end of described assistant release coil TQ.
Based on above-mentioned, the gate voltage current rectifying and wave filtering circuit of described resistance R 1, described resistance R 2, described resistance R 3, described electrolytic capacitor C1, described electrolytic capacitor C2 and described electrolytic capacitor C3 formation three and door operating circuit.
Based on above-mentioned, three AND circuit of described electrolytic capacitor C4, described triode V10, described triode V11 and described triode V12 formation three and door operating circuit.
Based on above-mentioned, the time-delay of the output circuit of described resistor R5, described triode V10 and described electrolytic capacitor C4 formation three and door operating circuit.
Based on above-mentioned, the executive circuit of described single-phase thyristor VT1, described capacitor C4 and described assistant release coil TQ formation three and door operating circuit.
Based on above-mentioned, for handled easily, be provided with operating grip 23 on the described switch case loam cake 2, described operating grip 23 bottoms are connected with described divide-shut brake trip gear 5.
Based on above-mentioned, 1 is provided with three phase connection 11 on the described switch case, the other end of described threephase switch dynamic/static contact 52 connects described three phase connection 11, described three phase connection 11 is as power access end, described switch case 1 bottom is provided with switch case base 3, be provided with three-phase terminal 31 on the described switch case base 3, the other end of three described annular voltage transformer 7 primary sides connects respectively described three-phase terminal 31, described three-phase terminal 31 makes things convenient for this this three-phase automatic switch wiring as power output end.
Based on above-mentioned, in order to make things convenient for the test of this three-phase automatic switch, be provided with test button 22 on the described switch case loam cake 2, described test button 22 is connected with described test button AN1.
Based on above-mentioned, for the convenient inner case of observing this three-phase automatic switch, be provided with transparent windows 21 on the described switch case loam cake 2.
When this three-phase automatic switch specifically uses: before this three-phase automatic switch comes into operation, carry out test operation, upwards pull first operating grip 23, the operation of connection contactor, pressing described test button 22 detects, if switch trip is out of service, then this three-phase automatic switch can normally move.Detect principle: press described test button 22 and namely be equivalent to short circuit thyristor VT2 anode and negative electrode, connected assistant release coil TQ, cause assistant release 53 to be threaded off, thereby so that divide-shut brake trip gear 5 moves, switch trip is out of service.
Tried switch can come into operation, and should pull operating grip 23 downwards first so that assistant release 53 snap closes this moment, more upwards operating grip 23 so that threephase switch closes a floodgate again normal operation input.
When the short circuit overcurrent fault appearred in circuit, three short circuit overcurrent releases 51 moved simultaneously, and armature is inhaled lower, promoted 5 tripping operations of divide-shut brake trip gear, played the short circuit overcurrent protective effect.
When leak current fault appears in circuit; leakage current signal of described zero sequence current mutual inductor second siding ring CCL1 output; this leakage current signal after process capacitor C 5 is removed high-frequency interferencing signal, is applied to the thyristor VT2 control utmost point and negative electrode two ends through adjustable resistance R6 current limliting; trigger thyristor VT2 conducting; connect assistant release coil TQ, caused assistant release 53 to be threaded off, thereby so that 5 actions of divide-shut brake trip gear; switch trip is out of service, realizes creepage protection function.
Default-phase protection function: under normal circumstances; threephase switch is connected; three-phase line load loop current consists of current circuit by the primary side of three annular voltage transformers 7 respectively; at this moment; will certainly be at the second siding ring PT1 of three annular voltage transformers 7; coil PT2 and coil PT3 form induced voltage; this induced voltage is applied on the three-phase bridge rectification diode; provide working power by power output end VCC for described assistant release coil TQ; this induced voltage is applied to rectifier diode V7 simultaneously; rectifier diode V8; on the rectifier diode V9; through resistance R 1; resistance R 2; resistance R 3 current limlitings; through electrolytic capacitor C1; electrolytic capacitor C2; after the electrolytic capacitor C3 filtering; be input to respectively the base stage of described triode V10; the base stage of described triode V11; the base stage of described triode V12; through described triode V10; out gate electrode potential behind described triode V11 and the described triode V12; so that state triode V10; described triode V11 and described triode V12 are in the saturation conduction state; at this moment; three with the output of three AND circuit of door operating circuit be electronegative potential; described three with the executive circuit of door operating circuit in the thyristor VT1 control utmost point also be electronegative potential; can't conducting, circuit is in normal operating conditions.
When open-phase fault appears in circuit; namely when the three-phase electricity source comprises that three-phase line load current circuit the broken string open-phase fault occurs arbitrarily mutually; for example: the three-phase in the power supply is the phase shortage that breaks mutually wherein; the second siding ring PT1 that certainly will cause three annular voltage transformers 7; coil PT2 and coil PT3 can't export one of them; cause described triode V10; one of them input of described triode V11 and described triode V12 is electronegative potential; and then cause described triode V10; described triode V11 and described one of them cut-off of triode V12; three with the output of three AND circuit of door operating circuit be high potential; charge to electrolytic capacitor C4 through resistor R5; its charging process is time-delay process (about 1 second); along with reducing gradually of charging current; described triode V10; one of them control electrode potential of described triode V11 and described triode V12 increases gradually; described thyristor VT1 conducting; connected assistant release coil TQ; cause assistant release 53 to be threaded off; thereby so that divide-shut brake trip gear 5 actions; switch trip is out of service, finishes the open-phase protection holding function.
The analysis showed that by above-described embodiment: the highly reliable Multifunctional three-phase automatic switch that adopts the method to make, have that defencive function is complete, reliability is high, stable performance, economical and practical, relatively prolonged the outstanding advantages such as useful life of product.
Should be noted that at last: above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit; Although with reference to preferred embodiment the utility model is had been described in detail, those of ordinary skill in the field are to be understood that: still can make amendment or the part technical characterictic is equal to replacement embodiment of the present utility model; And not breaking away from the spirit of technical solutions of the utility model, it all should be encompassed in the middle of the technical scheme scope that the utility model asks for protection.
Claims (5)
1. three-phase automatic switch is characterized in that: it comprises switch case, be arranged on threephase switch, the switch case loam cake, the electric sub-member plate that engage with described switch case in the described switch case and be arranged on automatic switch control circuit on the described electric sub-member plate;
Wherein, described threephase switch comprises the divide-shut brake trip gear, zero sequence current mutual inductor, three annular voltage transformers and threephase switch dynamic/static contact, described divide-shut brake trip gear is connected with three short circuit overcurrent releases and an assistant release, described assistant release comprises assistant release coil TQ, one end of three described short circuit overcurrent releases connects respectively an end of described threephase switch dynamic/static contact, the other end of described threephase switch dynamic/static contact is as power access end, the common end that connects described zero sequence current mutual inductor primary side of the other end of three described short circuit overcurrent releases, the other end of described zero sequence current mutual inductor primary side connects respectively an end of three described annular voltage transformer primary sides, the other end of three described annular voltage transformer primary sides is respectively as power output end, one end ground connection of described zero sequence current mutual inductor secondary side, an end of three described annular voltage transformer secondary sides links together;
Described automatic switch control circuit comprises power circuit, leakage protection circuit and three AND circuit, wherein, described power circuit comprises the three-phase bridge rectification diode, described three-phase bridge rectification diode comprises diode V1, diode V2, diode V3, diode V4, diode V5 and diode V6, the anode of described diode V1, the anode of described diode V2, the anode of described diode V3 connects the other end of three described annular voltage transformer secondary sides successively, the negative electrode of described diode V4, the negative electrode of described diode V5, the negative electrode of described diode V6 connects the other end of three described annular voltage transformer secondary sides successively, the negative electrode of described diode V1, the negative electrode of described diode V2, the negative electrode of described diode V3 links together as power output end VCC, the anode of described diode V4, the anode of described diode V5, the anode of described diode V6 is ground connection respectively;
Described leakage protection circuit comprises adjustable resistance R6, unidirectional thyristor VT2, capacitor C 5, assistant release coil TQ and test button AN1, the end of described adjustable resistance R6 is connected with the other end of described zero sequence current mutual inductor secondary side, the control utmost point of the other end of described adjustable resistance R6 and described unidirectional thyristor VT2 be connected an end of capacitor C 5 and be connected, the negative electrode of the other end of described capacitor C 5 and described unidirectional thyristor VT2 is ground connection respectively, the anode of described unidirectional thyristor VT2 respectively with the end of described assistant release coil TQ be connected the end of test button AN1 and be connected, the other end of described assistant release coil TQ is connected with described power output end VCC, and the other end of described test button AN1 connects the negative electrode of described unidirectional thyristor VT2;
Described three with the door operating circuit comprise rectifier diode V7, rectifier diode V8, rectifier diode V9, resistance R 1, resistance R 2, resistance R 3, resistance R 4, resistance R 5, electrolytic capacitor C1, electrolytic capacitor C2, electrolytic capacitor C3, electrolytic capacitor C4, triode V10, triode V11, triode V12 and single-phase thyristor VT1, wherein, the anode of described rectifier diode V7, the anode of described rectifier diode V8, the anode of described rectifier diode V9 connects the other end of three described annular voltage transformer secondary sides successively, the negative electrode of described rectifier diode V7 is connected with an end of described resistance R 1, the positive pole of the other end of described resistance R 1 and described electrolytic capacitor C1 be connected the base stage of triode V10 and be connected, the minus earth of described electrolytic capacitor C1, the negative electrode of described rectifier diode V8 is connected with an end of described resistance R 2, the positive pole of the other end of described resistance R 2 and described electrolytic capacitor C2 be connected the base stage of triode V11 and be connected, the minus earth of described electrolytic capacitor C2, the negative electrode of described rectifier diode V9 is connected with an end of described resistance R 3, the positive pole of the other end of described resistance R 3 and described electrolytic capacitor C3 be connected the base stage of triode V12 and be connected, the minus earth of described electrolytic capacitor C3, the collector electrode of described triode V10 is connected with an end of described resistance R 4, the other end of described resistance R 4 is connected with described power output end VCC, the collector electrode of described triode V11 is connected with the emitter of described triode V10, the collector electrode of described triode V12 is connected with the emitter of described triode V11, the grounded emitter of described triode V12, one end of described resistance R 5 is connected with the collector electrode of described triode V10, the other end of described resistance R 5 is connected with the positive pole of described electrolytic capacitor C4, the minus earth of described electrolytic capacitor C4, the positive pole of described electrolytic capacitor C4 is connected with the control utmost point of described single-phase thyristor VT1, the anode of described single-phase thyristor VT1 is connected the minus earth of described single-phase thyristor VT1 with the end of described assistant release coil TQ.
2. three-phase automatic switch according to claim 1 is characterized in that: cover on the described switch case and be provided with operating grip, described operating grip bottom is connected with described divide-shut brake trip gear.
3. three-phase automatic switch according to claim 1 and 2, it is characterized in that: be provided with three phase connection on the described switch case, the other end of described threephase switch dynamic/static contact connects described three phase connection, described switch case bottom is provided with the switch case base, be provided with three-phase terminal on the described switch case base, the other end of three described annular voltage transformer primary sides connects respectively described three-phase terminal.
4. three-phase automatic switch according to claim 3, it is characterized in that: cover on the described switch case and be provided with the test button, described test button is connected with described test button AN1.
5. three-phase automatic switch according to claim 4 is characterized in that: cover on the described switch case and be provided with transparent windows.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220516983 CN202817716U (en) | 2012-10-10 | 2012-10-10 | Three-phase automatic switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220516983 CN202817716U (en) | 2012-10-10 | 2012-10-10 | Three-phase automatic switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202817716U true CN202817716U (en) | 2013-03-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220516983 Withdrawn - After Issue CN202817716U (en) | 2012-10-10 | 2012-10-10 | Three-phase automatic switch |
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| Country | Link |
|---|---|
| CN (1) | CN202817716U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102891475A (en) * | 2012-10-10 | 2013-01-23 | 河南开启电力实业有限公司 | Three-phase automatic switch |
-
2012
- 2012-10-10 CN CN 201220516983 patent/CN202817716U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102891475A (en) * | 2012-10-10 | 2013-01-23 | 河南开启电力实业有限公司 | Three-phase automatic switch |
| CN102891475B (en) * | 2012-10-10 | 2015-02-18 | 河南开启电力实业有限公司 | Three-phase automatic switch |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130320 Effective date of abandoning: 20150218 |
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| RGAV | Abandon patent right to avoid regrant |