CN1988303B - Leaking current controller - Google Patents
Leaking current controller Download PDFInfo
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- CN1988303B CN1988303B CN2005101225554A CN200510122555A CN1988303B CN 1988303 B CN1988303 B CN 1988303B CN 2005101225554 A CN2005101225554 A CN 2005101225554A CN 200510122555 A CN200510122555 A CN 200510122555A CN 1988303 B CN1988303 B CN 1988303B
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- mutual inductor
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Abstract
This invention relates to a control device for leak current, which includes: a zero-order current mutual inductor, a primary coil, a secondary coil and a supply cut-off part, also includes a test line, in which, the primary coil contains a supply line, a neutral line and a surface line, and the supply line passes through the zero-order current mutual-inductor and is connected with the first cut-off switch, the neutral line passes through the mutual-inductor and is connected with the second cut-off switch, one end of the surface line is contacted with the metal surface shell of the supply line and the neutral line, the other end winds the mutual-inductor and is connected with the supply line and the neutral line by resistors; the one end of the test line contacts with the surface line of the metal epidermal shell and the other end of the test line is connected with the one end of a test switch by a resistor and connected with the supply line via the other end of the test switch. The device of the invention can detect leakage current and ground fault current at the same time, and decrease the number of coiling of the zero-order current mutual inductor used for detecting leakage current and ground fault current, thereby simplifying the corresponding circuit structure.
Description
Technical field
The present invention relates to a kind of leaking current controller.
Background technology
In general, air conditioner be used for to indoor discharge cold/air of warm state, simultaneously room air is purified, and provides comfortable indoor environment to the user.
As shown in Figure 1, above-mentioned air conditioner is made of indoor set 1 and off-premises station 2, when carrying out the greenhouse operation, flowing in the heat exchanger of above-mentioned indoor has the refrigerant of HTHP, the air that this refrigerant circulates in the heat exchanger of indoor is emitted heat, and to indoor discharge warm braw, thereby the indoor greenhouse that carries out is operated; When carrying out the cold-room operation, flowing in the heat exchanger of above-mentioned indoor has the refrigerant of cryogenic high pressure, the heat that contains in the air that circulates in the inboard heat exchanger of this refrigerant absorption chamber, and to indoor discharge cold wind, thereby the indoor cold-room that carries out is operated.
In above-mentioned air conditioner, will the operation of above-mentioned compressor be controlled according to size and the indoor temperature and the design temperature etc. of the alternating voltage of supplying with in the product inside.
At this moment, above-mentioned air conditioner supplies to 3 phase power supplys, and drives, and in above-mentioned power supply abnormal conditions takes place, and, under the situation that leakage current or earth fault current take place, will cause the security incident and the fire hazard that cause therefrom that is.In order to prevent above-mentioned contingent security incident and fire hazard, and be provided with the leaking current controller that is used to protect above-mentioned air conditioner.
The leaking current controller of prior art is made of zero sequence current mutual inductor (ZCT, Zero CrossTransformer), and above-mentioned zero sequence current mutual inductor (ZCT) is used to prevent the security incident and the disaster that are caused by electric leakage, and mechanical device is protected.
Above-mentioned zero sequence current mutual inductor (ZCT) is made of annular shape, by once reaching secondary coil, obtains being in the zero-sequence current of magnetic balance state from the power line that connects central part and the neutral line, and changes according to the flux that takes place and to detect leakage current.
But, in the leaking current controller of above-mentioned prior art,, thereby cause the circuit structure of leaking current controller comparatively complicated because the coiling number that twines in the above-mentioned zero sequence current mutual inductor (ZCT) is more.
Summary of the invention
Technical problem underlying to be solved by this invention is, overcome the above-mentioned defective that existing technology exists, and provide a kind of leaking current controller, can detect leakage current and earth fault current simultaneously by the present invention, and reduce the coiling number of the zero sequence current mutual inductor (ZCT) be used to detect above-mentioned leakage current and earth fault current, thereby can simplify corresponding circuit structure.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of leaking current controller comprises: zero sequence current mutual inductor (ZCT), and it is used to detect the electric current of a side direction of power line and the difference between current of opposite side direction; Primary winding, it twines and is arranged on the above-mentioned zero sequence current mutual inductor (ZCT); Secondary coil, it twines and is arranged on the above-mentioned zero sequence current mutual inductor (ZCT); Dump portion, it is connected in above-mentioned secondary coil, change the electric leakage state of judging according to the flux that generates by above-mentioned zero sequence current mutual inductor (ZCT) induction, generation is used to cut off the signal of the power supply of said power, this leaking current controller also comprises p-wire, above-mentioned primary winding, it comprises power line, the neutral line and epidermis line, said power connects above-mentioned zero sequence current mutual inductor (ZCT), and cut off and to be connected with switch with first, the above-mentioned neutral line connects above-mentioned zero sequence current mutual inductor (ZCT), and cut off and to be connected with switch with second, the metal epidermis housing contacts of one end of above-mentioned epidermis line and the said power and the neutral line, its other end is wound in above-mentioned zero sequence current mutual inductor (ZCT), and is connected with the above-mentioned neutral line with said power by resistance; Above-mentioned p-wire, the one end contacts with the above-mentioned epidermis line of metal epidermis shell, and the other end is connected with the end of test with switch by resistance, and is connected with said power by the other end of above-mentioned test with switch.
Aforesaid leaking current controller, wherein leaking current controller is arranged in the air conditioner.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is the schematic perspective view of air conditioner structure of the prior art;
Fig. 2 is the circuit diagram of the leaking current controller among the present invention.
The number in the figure explanation:
10: zero sequence current mutual inductor (ZCT) 20: dump portion
L11: power line (HOT) L12: the neutral line (NEUTRAL)
L13: epidermis line (SHEATH LINE) L14: secondary coil
L15: p-wire (TEST LINE) SW1: dump switch
SW2: test switch GROUND: earth connection
LOAD: load SHEATH: metal epidermis shell
U1 to U4: amplifier (OP-AMP)
Embodiment
As shown in Figure 2, include in the above-mentioned leaking current controller: run through above-mentioned zero sequence current mutual inductor (ZCT, 10), and to the power line of load (LOAD) supply power (HOT, L11); Perforation be arranged at above-mentioned zero sequence current mutual inductor (ZCT, 10) the neutral line (NEUTRAL, L12); Earth connection (GROUND); Said power (HOT, L11), the neutral line (NEUTRAL, L12), metal epidermis (Sheath) shell of earth connection (GROUND); Be used to test above-mentioned zero sequence current mutual inductor (ZCT, 10) p-wire (Test Line, L15).
Wherein, above-mentioned leaking current controller is arranged in the air conditioner, and is used to detect whether situation of the electric leakage of the power supply of supplying with to the load of above-mentioned air conditioner and earth fault.
Include a plurality of amplifiers (OP-AMP), a plurality of diode, a plurality of resistance in the above-mentioned dump portion 20, wherein, be wound in above-mentioned zero sequence current mutual inductor (ZCT, 10) secondary coil (L14), according to above-mentioned zero sequence current mutual inductor (ZCT, 10) flux changes and the generation electric current, 20 pairs of electric currents that generate by above-mentioned secondary coil (L14) induction of above-mentioned dump portion amplify and transmit, simultaneously, (HOT is L11) to the load circuit supply power of above-mentioned air conditioner to cut off said power according to the electric leakage state.
At this moment, above-mentioned dump portion 20 amplifies the signal that above-mentioned secondary coil (L14) transmits by above-mentioned a plurality of amplifiers (OP-AMP), and under the situation that is judged as leakage current or earth fault current, by the solenoid (SOL) that is provided with in the above-mentioned dump portion 20, to with said power (HOT, L11) and the neutral line (NEUTRAL, L12) dump that connects inserts the on/off operation signal with switch (SW1), thereby can cut off the power supply of supplying with to above-mentioned load (LOAD).
Wherein, include power line (HOT in the above-mentioned primary winding, L11) and the neutral line (NEUTRAL, L12), and, also include to twine and be arranged at above-mentioned zero sequence current mutual inductor, and according to above-mentioned zero sequence current mutual inductor (ZCT, 10) flux change and generate faradic epidermis line (Sheath Line, L13), and with above-mentioned epidermis line (Sheath Line, L13) contact, and be used to judge above-mentioned zero sequence current mutual inductor (ZCT, 10) normal running whether p-wire (Test Line, L15).
Said power (HOT, L11) and the neutral line (NEUTRAL, L12) be connected with switch (SW1) with the dump that is used for dump, it runs through above-mentioned zero sequence current mutual inductor (ZCT, 10), and according to above-mentioned dump supply with the ON/OFF (ON/OFF) of switch (SW1) or cut off the electricity supply.
Above-mentioned epidermis line (Sheath Line, L13) a end and said power (HOT, L11) and the neutral line (NEUTRAL, L12), metal epidermis (Metal sheath) housing contacts of earth connection (GROUND), and winding is arranged on the above-mentioned zero sequence current mutual inductor (ZCT, 10).Wherein, (Sheath Line L13) will twine setting with above-mentioned secondary coil (L14) and above-mentioned zero sequence current mutual inductor (ZCT, 10) to above-mentioned epidermis line side by side.
Above-mentioned epidermis line (Sheath Line, L13) the other end is by resistance (Rld1, Rld2) with said power (HOT, L11) and the neutral line (NEUTRAL L12) connects, at this moment, above-mentioned resistance (Rld1, Rld2) will be connected in said power (HOT, L11) and the neutral line (NEUTRAL, L12) dump that connects is with an end of switch (SW1).
(Test Line, (other end then is connected with switch (SW2) with above-mentioned test above-mentioned p-wire for Sheath Line, metal epidermis L13) (Metal sheath) housing contacts for end L15) and above-mentioned epidermis line.
(Test Line L15) is connected with switch (SW2) with above-mentioned test by resistance (Rt1) above-mentioned p-wire, and then (HOT L11) contacts the other end of above-mentioned test usefulness switch (SW2), and is connected in above-mentioned dump switch (SW1) with said power.
At this moment, be connected with switch (SW1) with above-mentioned dump by above-mentioned test a end with switch (SW2), above-mentioned p-wire (Test Line, L15) will with above-mentioned epidermis line (Sheath Line, end connection L13).
(Test Line, (Sheath Line L13) directly connects above-mentioned p-wire, is not arranged on the above-mentioned zero sequence current mutual inductor (ZCT, 10) and do not twine in addition L15) to go up the epidermis line that twines with above-mentioned zero sequence current mutual inductor (ZCT, 10).Under the situation that above-mentioned test is connected with switch (SW2), can test the above-mentioned zero sequence current mutual inductor (ZCT, 10) and the operation of leaking current controller.
Above-mentioned test is arranged at above-mentioned leaking current controller in appearance with switch (SW2), be used for by the user confirm leakage current and earth fault current normally whether, and be used to confirm whether dump operates pairing normal running.
As mentioned above, in above-mentioned leaking current controller, be provided with not winding in addition and be arranged at above-mentioned zero sequence current mutual inductor (ZCT, 10) (the Test Line of the p-wire on, L15), thus can reduce the coiling number that above-mentioned zero sequence current mutual inductor (ZCT, 10) go up to twine.And, in above-mentioned leaking current controller, by above-mentioned p-wire (Test Line, L15) manual ON/OFF (ON/OFF) said power (HOT, signal L11).
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, every foundation technical spirit of the present invention all still belongs in the scope of technical solution of the present invention any simple modification, equivalent variations and modification that above embodiment did.
The effect of invention
Leaking current controller of the present invention can carry out leakage current by metal epidermis (Metal Sheath) shell and detect operation, and be provided with the p-wire that is not wrapped on the above-mentioned zero sequence current mutual inductor (ZCT), thereby can carry out to the power supply that supplies to load (LOAD) manual ON/OFF (ON/OFF) operation, and can reduce the coiling number of above-mentioned zero sequence current mutual inductor (ZCT), thus, the circuit structure of above-mentioned leaking current controller can be simplified, and circuit design can be easy to carry out.
Claims (2)
1. leaking current controller comprises: zero sequence current mutual inductor (ZCT), and it is used to detect the electric current of a side direction of power line and the difference between current of opposite side direction; Primary winding, it twines and is arranged on the above-mentioned zero sequence current mutual inductor (ZCT); Secondary coil, it twines and is arranged on the above-mentioned zero sequence current mutual inductor (ZCT); Dump portion, it is connected in above-mentioned secondary coil, changes the electric leakage state of judging according to the flux that is generated by above-mentioned zero sequence current mutual inductor (ZCT) induction, generates the signal of the power supply that is used to cut off said power, it is characterized in that: also comprise p-wire,
Described primary winding comprises power line, the neutral line and epidermis line, wherein, said power connects above-mentioned zero sequence current mutual inductor (ZCT), and cut off and to be connected with switch with first, the above-mentioned neutral line connects above-mentioned zero sequence current mutual inductor (ZCT), and cut off and to be connected with switch with second, the metal epidermis housing contacts of one end of above-mentioned epidermis line and the said power and the neutral line, its other end is wound in above-mentioned zero sequence current mutual inductor (ZCT), and is connected with the above-mentioned neutral line with said power by resistance;
Described p-wire one end contacts with the above-mentioned epidermis line of metal epidermis shell, and the other end is connected with the end of test with switch by resistance, and is connected with said power by the other end of above-mentioned test with switch.
2. leaking current controller according to claim 1 is characterized in that: above-mentioned leaking current controller is arranged in the air conditioner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2005101225554A CN1988303B (en) | 2005-12-22 | 2005-12-22 | Leaking current controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2005101225554A CN1988303B (en) | 2005-12-22 | 2005-12-22 | Leaking current controller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1988303A CN1988303A (en) | 2007-06-27 |
| CN1988303B true CN1988303B (en) | 2011-04-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2005101225554A Expired - Fee Related CN1988303B (en) | 2005-12-22 | 2005-12-22 | Leaking current controller |
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| Country | Link |
|---|---|
| CN (1) | CN1988303B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103107514B (en) * | 2011-11-12 | 2015-12-16 | 吴伟 | The detection means of defence of electricity leakage on outer surface of electrical equipment and system |
| CN108196542A (en) * | 2017-12-31 | 2018-06-22 | 江苏密斯欧智能科技有限公司 | A kind of transmission line of electricity leakage current crusing robot control device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87203682U (en) * | 1987-03-10 | 1988-03-16 | 李天宝 | Warning brotective device of bakage current |
| CN2178958Y (en) * | 1993-04-22 | 1994-10-05 | 许光德 | Multifunction electricity leakage trip apparatus |
| CN2322298Y (en) * | 1998-05-05 | 1999-06-02 | 梁超瑞 | Leakage current acition protector with sensor |
-
2005
- 2005-12-22 CN CN2005101225554A patent/CN1988303B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87203682U (en) * | 1987-03-10 | 1988-03-16 | 李天宝 | Warning brotective device of bakage current |
| CN2178958Y (en) * | 1993-04-22 | 1994-10-05 | 许光德 | Multifunction electricity leakage trip apparatus |
| CN2322298Y (en) * | 1998-05-05 | 1999-06-02 | 梁超瑞 | Leakage current acition protector with sensor |
Non-Patent Citations (1)
| Title |
|---|
| JP平5-182579A 1993.07.23 |
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| Publication number | Publication date |
|---|---|
| CN1988303A (en) | 2007-06-27 |
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