CN106257782A - Ac leakage drives protector - Google Patents
Ac leakage drives protector Download PDFInfo
- Publication number
- CN106257782A CN106257782A CN201610366412.6A CN201610366412A CN106257782A CN 106257782 A CN106257782 A CN 106257782A CN 201610366412 A CN201610366412 A CN 201610366412A CN 106257782 A CN106257782 A CN 106257782A
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- Prior art keywords
- contact
- leakage
- circuit
- failure detector
- protector
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
- H02H3/207—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage also responsive to under-voltage
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/24—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to undervoltage or no-voltage
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/24—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to undervoltage or no-voltage
- H02H3/253—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to undervoltage or no-voltage for multiphase applications, e.g. phase interruption
Abstract
The invention discloses a kind of ac leakage and drive protector; failure detector circuit and electric leakage including harmonics device drive protected location; this driver element includes group relay contact and an electric capacity; electric capacity (C1) one relay termination the first contact (24); one phase line of another termination alternating current power supply of electric capacity, relay the second contact (21) connects failure detector circuit the second contact (11)；Failure detector circuit the first contact (12) connects earth lead, and failure detector circuit the 3rd contact (14) is dead end；When ac power supply circuit breaks down, phase line, electric capacity, relay contact closure, failure detector circuit outfan the second contact constitute detection of electrical leakage drive circuit with the first contact conducting, earth lead, control leakage switch (LK) and disconnect.Ac leakage of the present invention drives protector when power supply circuits break down, and electric leakage drives protected location can drive earth leakage protective device thus cuts off ac power circuit, improves supply network safety and reliability.
Description
Technical field
The present invention relates to a kind of harmonics device, particularly relate to a kind of ac leakage and drive protector.
Background technology
At present the three-phase alternating-current powered fault of supply network mainly has: misphase, phase shortage, overvoltage, under-voltage, imbalance, lacks zero, lack ground, cross stream.Single-phase ac power supply fault mainly has: overvoltage, under-voltage, lack zero, lack ground, cross stream.In existing three phase supply circuit, air switch and the chopper of band creepage protection function had stream and creepage protection function to three-phase circuit, and self had the ability cutting off circuit, saw Fig. 1；The protection of other power supply trouble is to realize protection by electronic apparatus protection device (such as three-phase alternating current protector) and the cut-out of A.C. contactor composition and control loop.Such as; it is installed in three phase supply loop protection circuit by representational electric equipment products three-phase alternating current protector; see Fig. 1; three-phase alternating current protector includes one group of contact of outfan; wherein the first contact 14, the 12, second contact the 11, the 3rd, contact, three-phase alternating-current supply A, B, C access three-phase alternating current protector input；When three-phase alternating-current supply A, B, C phase normally works; electric leakage air switch LK closes, the second contact 11 and the first contact 14 adhesive of three-phase alternating current protector outfan, A.C. contactor actuating coil JK adhesive; A.C. contactor K turns on, and load (such as motor M) accesses three-phase alternating-current supply.When three-phase alternating-current supply A, B, C phase breaks down, the first contact 11 of three-phase alternating current protector outfan and the 3rd contact 14 disconnect, and A.C. contactor actuating coil JK discharges, and A.C. contactor K disconnects, and load (such as motor M) disconnects with three-phase alternating-current supply.Three-phase alternating current protector disconnects by the fault-signal detected and by controlling the contact 11,14 of self outfan, cuts off A.C. contactor actuating coil JK circuit, makes A.C. contactor K disconnect power supply circuits, it is thus achieved that the purpose of protection load.
But the defect of existing supply network is that electric leakage air switch LK only has the cut-out circuit function of self; other fault (such as overvoltage/undervoltage, misphase, disconnected phase) can only be disconnected by the contact 11,14 of three-phase alternating current protector; by cutting off A.C. contactor actuating coil JK, thus disconnect A.C. contactor K and cut off circuit.Fig. 1 is disclosed that three phase supply loop protection circuit, and single phase power supply loop protection circuit is with three phase supply loop protection circuit in like manner.
Summary of the invention
It is an object of the invention to provide a kind of ac leakage and drive protector; this ac leakage drives protector when power supply circuits break down; electric leakage drives protected location can drive earth leakage protective device thus cuts off ac power circuit; improve supply network safety and reliability, simplify the enforcement of control circuit and protection circuit.
In order to realize above-mentioned technical purpose, the present invention adopts the following technical scheme that
A kind of ac leakage drives protector; failure detector circuit including harmonics device; this failure detector circuit includes alternating current power supply incoming end; and many groups contact of outfan; often group contact is three; being respectively the first contact, the second contact and the 3rd contact, connect switch in the second contact, this switch can access the first contact or the 3rd contact；Failure detector circuit is connected on alternating current source；
Described ac leakage drives protector also to include, and electric leakage drives protected location; this driver element includes group relay contact and an electric capacity; electric capacity one relay termination the first contact, a phase line of another termination alternating current power supply of electric capacity, relay the second contact connects failure detector circuit the second contact；Described failure detector circuit the first contact connects earth lead, and failure detector circuit the 3rd contact is dead end；When ac power supply circuit breaks down, phase line, electric capacity, relay contact closure, failure detector circuit outfan the second contact constituting detection of electrical leakage drive circuit with the first contact conducting, earth lead, detection of electrical leakage drive circuit controls leakage switch and disconnects.
Described relay is time delay attracting electric relay.
Described electric leakage drives protected location to include two group relay contact and electric capacity; the relay contact of first group and termination one phase line of electric capacity built-up circuit; second contact of another termination failure detector circuit outfan first group; the relay contact of second group and another phase line of termination of electric capacity built-up circuit, the second contact of another termination failure detector circuit outfan second group.
Described electric leakage drives protected location to include two group relay contact and electric capacity; the relay contact of first group and termination one phase line of electric capacity built-up circuit; second contact of another termination failure detector circuit outfan first group; the relay contact of second group and another phase line of termination of electric capacity built-up circuit, the second contact of another termination failure detector circuit outfan first group.
Described failure detector circuit is voltage failure testing circuit or current failure testing circuit.
Described harmonics device is single phase ac protector, and described electric leakage drives protected location to be installed in single phase ac protector, and single phase ac protector makes protector plug, matches with the socket being installed on single phase ac circuit.
Ac leakage of the present invention drives protector to include, and failure detector circuit and electric leakage drive protected location; all contain in failure detector circuit general harmonics device; when power supply circuits break down; electric leakage drives protected location to drive the earth leakage protective device in existing Alternating Current Power Supply protective loop, thus cuts off ac power circuit.
Compared with prior art, it provides the benefit that the present invention:
The present invention utilizes the cut-out circuit function of the earth leakage protective device of band creepage protection function, air switch, chopper; short circuit, electric leakage, overcurrent can not only be played defencive function; but also for other fault of supply network; as phase shortage, lack zero, lack, overvoltage, under-voltage, misphase, imbalance etc., play a protective role.Thus deducted the A.C. contactor in harmonics loop, decrease the cost of defencive function.
Ac leakage of the present invention drives the electric leakage of protector to drive protected location to combine with the harmonics device containing fault detection capability; it is combined into the harmonics device of new generation that can directly drive earth leakage protective air switch and earth leakage circuit breaker; make defencive function simplification, universalness, and nor affect on the use as control circuit contact of the harmonics device output contact.
Ac leakage of the present invention drives protector to solve the three-phase alternating-current powered error protection of current supply network, single-phase ac power supply error protection uses A.C. contactor to cut off the limitation of main circuit.The present invention utilizes earth leakage protective device (or leakage switch) to cut off main circuit when supply network breaks down; make to cut off mode for power distribution circuit to simplify; reduce accessory, save distribution cost; the earth leakage protective device that safety coefficient is high is utilized to cut off circuit; supply network safety and reliability is made to be greatly improved; indirectly reduce the loss that distribution fault causes, simplify the enforcement of control circuit and protection circuit.
Accompanying drawing explanation
Fig. 1 is existing three phase supply loop protection conspectus；
Fig. 2 is that ac leakage of the present invention drives protector to access the conspectus of three-phase alternating-current supply；
Fig. 3 is that ac leakage of the present invention drives protector to access another conspectus of three-phase alternating-current supply；
Fig. 4 is that ac leakage of the present invention drives protector to access the conspectus of single phase alternating current power supply；
Fig. 5 is that ac leakage of the present invention drives protector to access another conspectus of single phase alternating current power supply；
Fig. 6 is that ac leakage of the present invention drives protector to be combined the conspectus making plug form access single phase alternating current power supply with protector.
Detailed description of the invention
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings.
See Fig. 2, Fig. 3; a kind of ac leakage drives protector; failure detector circuit including harmonics device; this failure detector circuit includes alternating current power supply incoming end A, B, C, N; and many groups contact of outfan, often group contact is three, the 12, second contact, the respectively first contact 11 and the 3rd contact 14; connecing switch in second contact 11, this switch can access the first contact 12 or the 3rd contact 14；Failure detector circuit is connected on the outfan of leakage switch LK, sees Fig. 2；Or, failure detector circuit is connected on the input of leakage switch LK.
Described ac leakage drives protector also to include, and electric leakage drives protected location; this driver element includes a group relay contact and electric capacity C1; electric capacity C1 mono-relay termination the first contact 24; one phase line C phase of another termination alternating current power supply of electric capacity C1, relay the second contact 21 connects failure detector circuit the second contact 11；Described failure detector circuit the first contact 12 connects earth lead, and failure detector circuit the 3rd contact 14 is dead end.When ac power supply circuit breaks down, by C phase phase line, electric capacity C1, relay contact 24,21 Guan Bi, failure detector circuit outfan the second contact 11 with the first contact 12 turns on, earth lead constitutes detection of electrical leakage drive circuit, detection of electrical leakage drive circuit control leakage switch LK disconnection.
In order to make three-phase alternating current protector can be connected to the outfan of earth leakage protective device (leakage switch LK); electric leakage drives the relay in protected location to be time delay attracting electric relay; the power on detection of electrical leakage drive circuit of hourglass electric drive protected location of earth leakage protective device is made to be off, it is ensured that earth leakage protective device powers on reliably.
Described electric leakage drives protected location to include two group relay contact and electric capacity; the relay contact 24,21 of first group and a termination one phase line C phase of electric capacity C1 built-up circuit; second contact 11 of another termination failure detector circuit outfan first group; the relay contact 44,41 of second group and another phase line B phase of termination of electric capacity C2 built-up circuit, the second contact 31 of another termination failure detector circuit outfan second group.First contact 12 of failure detector circuit outfan first group and first contact 32 of second group all connect earth lead, and the 3rd contact 14 of failure detector circuit outfan first group and the 3rd contact 34 of second group are all empty end.See Fig. 2.
Described electric leakage drives protected location to include two group relay contact and electric capacity; the relay contact 24,21 of first group and a termination one phase line C phase of electric capacity C1 built-up circuit; second contact 11 of another termination failure detector circuit outfan first group; the relay contact 44,41 of second group and another phase line B phase of termination of electric capacity C2 built-up circuit, the second contact 11 of another termination failure detector circuit outfan first group.First contact 12 of failure detector circuit outfan first group connects earth lead, and the 3rd contact 14 of failure detector circuit outfan first group is empty end, sees Fig. 3.The preferential connection circuitry selecting Fig. 2.
Described failure detector circuit is voltage failure testing circuit or current failure testing circuit.
The work process of ac leakage of the present invention driving protector is as follows:
See Fig. 2 and Fig. 3; when without electricity normal state; leakage switch LK(or earth leakage protective device) prepare when powering on; ac leakage drives the electric leakage of protector to drive protected location; two contacts of time delay attracting electric relay 21,24 such as first group are off; so this detection of electrical leakage drive circuit is not turned on, the detection of electrical leakage drive circuit of another group is also not turned on, and leakage switch LK can power on.When after powering on, the alternating current power supply of three-phase A, B, C phase is normal; the ac leakage of the present invention drives the output contact conducting in the failure detector circuit in protector; turn on as connected the second contact 14, contact the 11, the 3rd of the output contact of C phase; second contact 11 disconnects with the first contact 12, and three-phase alternating-current supply normally accesses load；Owing to have employed time delay attracting electric relay in driving protected location in electric leakage, after the power-up, after two contacts 24,21 time delay of time delay attracting electric relay, entered to conducting state by off-state.
nullWhen a certain phase in three-phase alternating-current supply breaks down，Ac leakage drives the second contact 11 of the failure detector circuit output contact in protector，By the second contact 11、3rd contact 14 conducting transfers disconnection to，And the second contact 11 and the first contact 12 are transferred to conducting by disconnection，I.e. second contact 11 turns on the first contact 12，At this moment ac leakage drives the electric leakage of protector to drive the time delay attracting electric relay contact 21 of protected location、24 is in the conduction state，So C phase current passes through electric capacity C1 and two contacts 21 of time delay attracting electric relay、24，The second contact 11 and the first contact 12 by failure detector circuit form leakage current loop with earth lead again，I.e. detection of electrical leakage drive circuit，So that leakage switch LK(earth leakage protective device) start，Cut off three-phase alternating-current supply to input to load circuit.In order to also obtain reliable leakage current at disconnected phase time, ac leakage drives relay contact and the electric capacity that the electric leakage of protector drives protected location can arrange more than one group, sees Fig. 2 and Fig. 3, to obtain reliable leakage current.
Above-described failure detector circuit is voltage failure testing circuit; the implementation of voltage failure testing circuit is: directly from three-phase or single-phase acquirement voltage signal; the electronic circuit of input AC protector carries out judging and relay contact output; and then input is to the electric leakage driving protected location of the present invention, reaches to protect purpose.
It is current failure testing circuit for failure detector circuit; the implementation of current failure testing circuit is: major loop adds current transformer; three-phase circuit is three current transformers; single-phase circuit is a current transformer; major loop wire passes current transformer center, electric current by time the electronic circuit of faradic current input AC protector that produces carry out judging and relay contact exports, in like manner; and then input is to the electric leakage driving protected location of the present invention, reaches to protect purpose.
For single phase alternating current circuit, single-phase three wire system, wherein, and a phase line, zero line, an earth lead.In single phase alternating current circuit, the power supply trouble such as improper voltage overvoltage, under-voltage, line off zero formed in conjunction with single phase ac protector, can the directly air switch of drive belt creepage protection function and circuit breaker trip circuit, to obtain protection.
See Fig. 4 and Fig. 5; a kind of single phase ac electric leakage drives protector; failure detector circuit including single phase ac protector; this failure detector circuit includes single phase alternating current power supply incoming end L, N; and three contacts of outfan; being respectively the 12, second contact, the first contact 11 and the 3rd contact 14, connect switch in the second contact 11, this switch can access the first contact 12 or the 3rd contact 14；Failure detector circuit is connected on the lower end after single phase alternating current power supply enters leakage switch LK.
Electric leakage drives protected location to be one group of time delay attracting electric relay contact and electric capacity C1, electric capacity C1 mono-relay termination the first contact 24, and phase line L of another termination alternating current power supply of electric capacity C1, time delay attracting electric relay the second contact 21 connects failure detector circuit the second contact 11；Failure detector circuit the first contact 12 connects earth lead, and failure detector circuit the 3rd contact 14 is dead end.When single-phase alternating current resource loop breaks down, by phase line L, electric capacity C1, relay contact 24,21 Guan Bi, failure detector circuit outfan the second contact 11 with the first contact 12 turns on, earth lead constitutes detection of electrical leakage drive circuit, detection of electrical leakage drive circuit control leakage switch LK disconnection.
When without electricity normal state; leakage switch LK(earth leakage protective device) prepare when powering on; single phase ac of the present invention electric leakage drives the electric leakage of protector to drive two contacts of time delay attracting electric relay 21,24 of protected location to be off; so this detection of electrical leakage drive circuit is not turned on, leakage switch LK can power on.When after powering on, single phase alternating current power supply is normal, in the failure detector circuit in single phase ac protector, the second contact 11 of output contact turns on the 3rd contact 14, and the second contact 11 disconnects with the first contact 12, and single phase alternating current power supply normally accesses load；Owing to have employed time delay attracting electric relay in driving protected location in electric leakage, after the power-up, after two contacts 24,21 time delay of time delay attracting electric relay, entered to conducting state by off-state.
When single phase alternating current power supply breaks down, ac leakage of the present invention drives the second contact 11 of the failure detector circuit output contact in protector, by the second contact 11, 3rd contact 14 conducting transfers disconnection to, and the second contact 11 and the first contact 12 are transferred to conducting by disconnection, i.e. second contact 11 turns on the first contact 12, at this moment electric leakage drives the time delay attracting electric relay contact 21 of protected location, 24 is in the conduction state, so monophase current passes through electric capacity C1 and two contacts 21 of time delay attracting electric relay, 24, the second contact 11 and the first contact 12 by failure detector circuit form leakage current loop with earth lead again, i.e. detection of electrical leakage drive circuit, so that leakage switch LK(earth leakage protective device) start, cut off single phase alternating current power supply to input to load circuit.
Ac leakage of the present invention drives protector to make use of the failure detector circuit of existing harmonics device; the electric leakage that proposes of novelty drives protected location; the ac leakage that the two has been bonded the present invention drives protector; therefore; being integrated in existing harmonics device by electric leakage driving protected location, such as three-phase alternating current protector or single phase ac protector, in protector, earth wire composition discharge loop drives earth leakage protective device; accessory can be reduced, make defencive function simplification, universalness.Ac leakage drives the electric leakage of protector to drive the electrical leakage quantity size of protected location can realize by changing electric capacity C amount of capacity; to realize different grade of rated voltages and electric leakage grade, the electrical leakage quantity of earth leakage protective device (or leakage switch) determines according to national Specification.
Ac leakage of the present invention drives protector can use in the supply network of any lines such as three-phase three-wire system, three-phase four-wire system, three-phase five-wire mode, single-phase three wire system, two-phase three line, and protects its loop.
Ac leakage of the present invention drives protector can combine with single phase ac protector; it is arranged on plug inside; composition band electric leakage drives the protector plug of protected location; see Fig. 6; this plug is inserted in the socket being connected to single phase ac circuit; can be to power supply troubles such as the improper voltages that the overvoltage of electrical network, under-voltage, line off zero are formed, the air switch of direct drive belt creepage protection function and circuit breaker trip circuit, to obtain protection load 1 and/or the purpose of load 2.This circuit is simple, an earth leakage protective circuit has only to fill a plug, low cost, and of many uses, is particularly suitable for rural electricity consumption protection and distance protection.
These are only presently preferred embodiments of the present invention, be not intended to limit protection scope of the present invention, therefore, all any modification, equivalent substitution and improvement etc. made within the spirit and principles in the present invention, should be included within the scope of the present invention.
Claims (6)
1. an ac leakage drives protector; failure detector circuit including harmonics device; this failure detector circuit includes alternating current power supply incoming end; and many groups contact of outfan; often group contact is three; being respectively the first contact (12), the second contact (11) and the 3rd contact (14), the second contact connects switch in (11), and this switch can access the first contact (12) or the 3rd contact (14)；Failure detector circuit is connected on alternating current source；It is characterized in that:
Described ac leakage drives protector also to include, and electric leakage drives protected location; this driver element includes group relay contact and an electric capacity; electric capacity one relay termination the first contact, a phase line of another termination alternating current power supply of electric capacity, relay the second contact connects failure detector circuit the second contact (11)；Described failure detector circuit the first contact (12) connects earth lead, and failure detector circuit the 3rd contact (14) is dead end；When ac power supply circuit breaks down, being constituted detection of electrical leakage drive circuit by phase line, electric capacity, relay contact closure, failure detector circuit outfan the second contact (11) with the first contact (12) conducting, earth lead, detection of electrical leakage drive circuit controls leakage switch and disconnects.
Ac leakage the most according to claim 1 drives protector, it is characterized in that: described relay is time delay attracting electric relay.
Ac leakage the most according to claim 1 and 2 drives protector; it is characterized in that: described electric leakage drives protected location to include two group relay contact and electric capacity; the relay contact of first group and termination one phase line of electric capacity built-up circuit; second contact of another termination failure detector circuit outfan first group; the relay contact of second group and another phase line of termination of electric capacity built-up circuit, the second contact of another termination failure detector circuit outfan second group.
Ac leakage the most according to claim 1 and 2 drives protector; it is characterized in that: described electric leakage drives protected location to include two group relay contact and electric capacity; the relay contact of first group and termination one phase line of electric capacity built-up circuit; second contact of another termination failure detector circuit outfan first group; the relay contact of second group and another phase line of termination of electric capacity built-up circuit, the second contact of another termination failure detector circuit outfan first group.
Ac leakage the most according to claim 1 and 2 drives protector, it is characterized in that: described failure detector circuit is voltage failure testing circuit or current failure testing circuit.
Ac leakage the most according to claim 1 and 2 drives protector; it is characterized in that: described harmonics device is single phase ac protector; described electric leakage drives protected location to be installed in single phase ac protector; and single phase ac protector makes protector plug, match with the socket being installed on single phase ac circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610366412.6A CN106257782B (en) | 2016-05-30 | 2016-05-30 | Ac leakage drives protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610366412.6A CN106257782B (en) | 2016-05-30 | 2016-05-30 | Ac leakage drives protector |
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| Publication Number | Publication Date |
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| CN106257782A true CN106257782A (en) | 2016-12-28 |
| CN106257782B CN106257782B (en) | 2018-05-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610366412.6A Active CN106257782B (en) | 2016-05-30 | 2016-05-30 | Ac leakage drives protector |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106992495A (en) * | 2017-04-20 | 2017-07-28 | 广州市豪尔生医疗设备有限公司 | A kind of earth leakage protective device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2899225Y (en) * | 2006-03-23 | 2007-05-09 | 江苏省电力公司南京供电公司 | Break zero-loss phase protecting distribution box |
| CN104360207A (en) * | 2014-12-03 | 2015-02-18 | 国家电网公司 | Leakage protector detection desk |
| CN204967226U (en) * | 2015-07-28 | 2016-01-13 | 无锡万吉科技有限公司 | Three -sphase four -wire system residual current circuit breaker circuit |
| US20160025794A1 (en) * | 2014-07-28 | 2016-01-28 | Kongju National University Industry-University Cooperation Foundation | Apparatus and method for detecting leakage current |
| CN205791445U (en) * | 2016-05-30 | 2016-12-07 | 曹德祥 | Ac leakage drives protector |
-
2016
- 2016-05-30 CN CN201610366412.6A patent/CN106257782B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2899225Y (en) * | 2006-03-23 | 2007-05-09 | 江苏省电力公司南京供电公司 | Break zero-loss phase protecting distribution box |
| US20160025794A1 (en) * | 2014-07-28 | 2016-01-28 | Kongju National University Industry-University Cooperation Foundation | Apparatus and method for detecting leakage current |
| CN104360207A (en) * | 2014-12-03 | 2015-02-18 | 国家电网公司 | Leakage protector detection desk |
| CN204967226U (en) * | 2015-07-28 | 2016-01-13 | 无锡万吉科技有限公司 | Three -sphase four -wire system residual current circuit breaker circuit |
| CN205791445U (en) * | 2016-05-30 | 2016-12-07 | 曹德祥 | Ac leakage drives protector |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106992495A (en) * | 2017-04-20 | 2017-07-28 | 广州市豪尔生医疗设备有限公司 | A kind of earth leakage protective device |
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| CN106257782B (en) | 2018-05-22 |
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