CN202864606U - Elevator electric system safety return circuit - Google Patents
Elevator electric system safety return circuit Download PDFInfo
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- CN202864606U CN202864606U CN 201220515095 CN201220515095U CN202864606U CN 202864606 U CN202864606 U CN 202864606U CN 201220515095 CN201220515095 CN 201220515095 CN 201220515095 U CN201220515095 U CN 201220515095U CN 202864606 U CN202864606 U CN 202864606U
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- safety return
- breaker
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Abstract
The utility model provides an elevator electric system safety return circuit which comprises a breaker, an electric leakage detecting unit and a plurality of safety switches, wherein a first port at the rear end of the electric leakage detecting unit is connected with a common point of a high voltage testing point of a controller through the plurality of safety switches which are connected in series, a second port is connected with a common point of the controller, a front end of the electric leakage detecting unit is connected with the power supply end through the breaker and switches off the breaker when current difference of the first port and the second port of the electric leakage detecting unit is larger than specified threshold value. By adding the electric leakage detecting unit in the safety return circuit, short circuit to earth and electric leakage in the safety return circuit can be detected, a return circuit can be timely cut off when the electric leakage is detected, electric shock and system misjudgment caused by the electric leakage are avoided.
Description
Technical field
The utility model relates to the elevator field, more particularly, relates to a kind of elevator electric system safety return circuit.
Background technology
Along with the development of elevator industry, elevator more and more is widely used in people's the life, and people are also more and more higher to the requirement of elevator safety.For realizing elevator safety operation, safety return circuit is indispensable.
As shown in Figure 1, in existing elevator safety loop, comprise that front end is connected to the air switch in voltage transformer mouth, connection safety switch loop, rear end.In this elevator safety loop, realize electrical safety by wire fuse and the air switch of input end voltage transformer.This safety return circuit can be realized overcurrent protection, shorted to earth protection, for example blown fuse when overcurrent, perhaps air switch tripping operation when shorted to earth.Can cut off in time elevator safety loop by above action, to guarantee the safe in operation of elevator device.
Safety method in the above-mentioned elevator safety loop can be in safety return circuit during any some shorted to earth, cuts off in time elevator safety loop, guarantees the safety of whole elevator device.But when elevator moves, have a kind of extraordinary circumstances: there is electric leakage in some node, and its electric current again deficiency perhaps makes the air switch tripping operation so that the fuse go is opened.In this kind situation, elevator safety loop shown in Figure 1 still is in conducting state, and this to personal safety, gets an electric shock serious threat in the time of for example will causing the staff to operate.
And if there is electric leakage in the system always, voltage transformer will be always in running order also, and this will increase the loss of voltage transformer, and affect its service life.
In addition, when there is electric leakage in safety return circuit, if this safety return circuit of untimely disconnection, exist the safety switch of electric leakage to form the loop with ground, and cause some safety switch from safety return circuit, to be kept apart, thereby cause system can't detect the state of these safety switchs, and cause the erroneous judgement of system.
The utility model content
The technical problems to be solved in the utility model is, can't carry out earth leakage protective problem for above-mentioned elevator safety loop, and a kind of elevator electric system safety return circuit is provided.
The technical scheme that the utility model solves the problems of the technologies described above is, a kind of elevator electric system safety return circuit is provided, comprise circuit breaker, detection of electrical leakage unit and a plurality of safety switch, wherein: the first port of rear end, described detection of electrical leakage unit is connected to the high pressure check point of controller, the concurrent that the second port connects controller via a plurality of safety switchs of serial connection; The front end of described detection of electrical leakage unit connects feeder ear and when the electric current difference of the first port of this detection of electrical leakage unit and the second port surpasses assign thresholds circuit breaker is disconnected via circuit breaker.
In elevator electric system safety return circuit described in the utility model, described circuit breaker is air circuit breaker.
In elevator electric system safety return circuit described in the utility model, described circuit breaker and detection of electrical leakage unit are positioned at same earth leakage circuit-breaker.
In elevator electric system safety return circuit described in the utility model, described feeder ear is the mouth of voltage transformer.
Elevator electric system safety return circuit of the present utility model has following beneficial effect: by increase the detection of electrical leakage unit in safety return circuit, can detect the shorted to earth in the safety return circuit and electric leakage, and detecting timely cut-off loop of when electric leakage, prevent from the leaking electricity electric shock and the system's erroneous judgement that cause are disconnected.The utility model can reduce the meaningless loss of voltage transformer by cut-off loop when leaking electricity.
Description of drawings
Fig. 1 is the scheme drawing of existing elevator safety loop.
Fig. 2 is the scheme drawing of the utility model elevator electric system safety return circuit embodiment.
The specific embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
As shown in Figure 2, be the scheme drawing of the utility model elevator electric system safety return circuit embodiment.Elevator electric system safety return circuit in the present embodiment comprises earth leakage circuit-breaker 21 and a plurality of safety switch X1-Xn; wherein earth leakage circuit-breaker 21 is positioned at the feeder ear of this elevator electric system safety return circuit; the mouth of its front end connection transformer 30, the first port of rear end is connected to the high pressure check point of controller 40, the concurrent that the second port connects controller 40 via the safety switch X1-Xn of a plurality of serial connections.
When the electric current difference of above-mentioned earth leakage circuit-breaker 21 between its first port and the second port surpasses assign thresholds (30mA for example, this value can according to different demand settings), cut off safety return circuit by tripping operation.In fact; when the electric current difference of earth leakage circuit-breaker 21 between its first port and the second port surpassed assign thresholds, safety return circuit namely existed electric leakage or short circuit, cut off safety return circuit this moment; not only can protect the operating personal personal safety, also can reduce the meaningless loss of voltage transformer.
Simultaneously, by the earth leakage protective of 21 pairs of safety return circuits of earth leakage circuit-breaker, the state of self can't be detected by system and cause that the erroneous judgement of system is disconnected because the electric leakage of other safety switchs causes in the safety return circuit can to prevent some safety switch.
When specific implementation, above-mentioned earth leakage circuit-breaker 21 can adopt electromagnetic type electric current action type RCCB or transistor current action type RCCB.
In concrete the application; above-mentioned earth leakage circuit-breaker 21 can use circuit breaker (for example air circuit breaker) and detection of electrical leakage unit (for example earth leakage protective device) to replace; wherein the first port of rear end, detection of electrical leakage unit is connected to the high pressure check point of controller, the concurrent that the second port connects controller via a plurality of safety switchs of serial connection, and the front end of this detection of electrical leakage unit connects feeder ear (for example mouth of voltage transformer) via circuit breaker.Above-mentioned detection of electrical leakage unit is for detection of the electric current difference of the first port and second port of its rear end, and circuit breaker is disconnected, thereby cuts off the power supply input of elevator electric system safety return circuit.
The above; it only is the better specific embodiment of the utility model; but protection domain of the present utility model is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the variation that can expect easily or replacement all should be encompassed within the protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain of claim.
Claims (4)
1. elevator electric system safety return circuit, it is characterized in that: comprise circuit breaker, detection of electrical leakage unit and a plurality of safety switch, wherein: the first port of rear end, described detection of electrical leakage unit is connected to the high pressure check point of controller, the concurrent that the second port connects controller via a plurality of safety switchs of serial connection; The front end of described detection of electrical leakage unit connects feeder ear and when the electric current difference of the first port of this detection of electrical leakage unit and the second port surpasses assign thresholds circuit breaker is disconnected via circuit breaker.
2. elevator electric system safety return circuit according to claim 1, it is characterized in that: described circuit breaker is air circuit breaker.
3. elevator electric system safety return circuit according to claim 1 and 2, it is characterized in that: described circuit breaker and detection of electrical leakage unit are positioned at same earth leakage circuit-breaker.
4. elevator electric system safety return circuit according to claim 3, it is characterized in that: described feeder ear is the mouth of voltage transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220515095 CN202864606U (en) | 2012-10-09 | 2012-10-09 | Elevator electric system safety return circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220515095 CN202864606U (en) | 2012-10-09 | 2012-10-09 | Elevator electric system safety return circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202864606U true CN202864606U (en) | 2013-04-10 |
Family
ID=48031346
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220515095 Expired - Lifetime CN202864606U (en) | 2012-10-09 | 2012-10-09 | Elevator electric system safety return circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202864606U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017041846A1 (en) * | 2015-09-10 | 2017-03-16 | Otis Elevator Company | Apparatus and method for ground fault detection |
| CN110562811A (en) * | 2019-09-12 | 2019-12-13 | 苏州汇川技术有限公司 | Safety loop state detection device and elevator system |
| CN116027098A (en) * | 2023-02-14 | 2023-04-28 | 青岛鼎信通讯股份有限公司 | Leakage current detection method suitable for flexible direct current comprehensive voltage regulating device |
-
2012
- 2012-10-09 CN CN 201220515095 patent/CN202864606U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017041846A1 (en) * | 2015-09-10 | 2017-03-16 | Otis Elevator Company | Apparatus and method for ground fault detection |
| CN108025885A (en) * | 2015-09-10 | 2018-05-11 | 奥的斯电梯公司 | Apparatus and method for ground fault detection |
| CN110562811A (en) * | 2019-09-12 | 2019-12-13 | 苏州汇川技术有限公司 | Safety loop state detection device and elevator system |
| CN110562811B (en) * | 2019-09-12 | 2021-11-19 | 苏州汇川技术有限公司 | Safety loop state detection device and elevator system |
| CN116027098A (en) * | 2023-02-14 | 2023-04-28 | 青岛鼎信通讯股份有限公司 | Leakage current detection method suitable for flexible direct current comprehensive voltage regulating device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160217 Address after: Wuzhong District Wuzhong Economic Development Zone, Suzhou City, Jiangsu province 215000 Wang Xiang Shan Industrial Park Road on the north side of friends Patentee after: SUZHOU INOVANCE TECHNOLOGY Co.,Ltd. Patentee after: SHENZHEN INOVANCE TECHNOLOGY Co.,Ltd. Address before: Suzhou City, Jiangsu province 215006 Industrial Park Road No. 25 Tak Industrial Park Building 3 Huichuan Patentee before: Suzhou Monarch Control Technology Co.,Ltd. Patentee before: SUZHOU INOVANCE TECHNOLOGY Co.,Ltd. Patentee before: SHENZHEN INOVANCE TECHNOLOGY Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130410 |