CN204886136U - Contrary power relay - Google Patents
Contrary power relay Download PDFInfo
- Publication number
- CN204886136U CN204886136U CN201520539991.0U CN201520539991U CN204886136U CN 204886136 U CN204886136 U CN 204886136U CN 201520539991 U CN201520539991 U CN 201520539991U CN 204886136 U CN204886136 U CN 204886136U
- Authority
- CN
- China
- Prior art keywords
- circuit
- output
- current
- electrically connected
- generator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The utility model discloses a contrary power relay, including the casing, locate the interior current detection circuit of casing, voltage detection circuit, timesharing product circuit, power ratio than output circuit, current detection circuit and voltage detection circuit all are connected with the input electricity of timesharing product circuit, and the output and the power ratio of timesharing product circuit are connected than output circuit's input electricity, and the power ratio is connected with the electric wire netting electricity than output circuit's output. The utility model has the characteristics of overflowing and detecting and alarming function, detect precision height, stability and good reliability, when the inverse probability of generator was greater than the contrary power threshold of settlement, accessible time control generator cut off with the electric wire netting to the effectual generator of having protected.
Description
Technical field
The utility model relates to electrical equipment manufacturing technology field, especially relates to a kind ofly being applicable to the inverse probability of the alternating current generator of the mini systems such as Ship Power Station and the reverse-power relay of overcurrent protection.
Background technology
In generator powered system, must ensure that generator is to load transmission power, when generator becomes the load of electric power system, this generator must be cut off fast from electrical network, otherwise generator will be burnt.
Chinese patent mandate publication number: CN201797299U, authorize publication date on April 13rd, 2011, disclose a kind of reverse-power relay, comprise inverse probability checkout gear and cut-off signal output apparatus, also comprise a delay circuit, the input of described delay circuit is connected with described inverse probability checkout gear, and the output of described delay circuit is connected with the described signal output apparatus that cut-offs.The weak point of this invention is, function singleness, does not have overcurrent protection function.
Summary of the invention
Goal of the invention of the present utility model is the deficiency not having overcurrent protection function in order to overcome relay of the prior art, provides a kind ofly to be applicable to the inverse probability of the alternating current generator of the mini systems such as Ship Power Station and the reverse-power relay of overcurrent protection.
To achieve these goals, the utility model is by the following technical solutions:
A kind of reverse-power relay, comprises housing, is located at the current detection circuit in housing, voltage detecting circuit, timesharing product circuit, power ratio comparatively output circuit; Current detection circuit and voltage detecting circuit are all electrically connected with the input of timesharing product circuit, and the output of timesharing product circuit is electrically connected with the input of power ratio compared with output circuit, and power ratio is electrically connected with electrical network compared with the output of output circuit;
Described current detection circuit comprises the first testing circuit and the second testing circuit, and the first testing circuit and the second testing circuit include the current transformer and several amplifiers of connecting successively;
Described voltage detecting circuit comprises and being connected and the amplifier of connecting successively and several inverters with 1 of generator; Also comprise the 4 groups of divider resistances of connecting successively be connected with other 2 of generator respectively.4 groups of equal ground connection of the divider resistance other end connected successively.
The utility model utilizes current transformer to measure the two-phase in the three-phase current of generator, and amplifies through operational amplifier; Utilize the cross streams voltage of voltage detecting circuit to generator to measure, and amplify through operational amplifier;
Detect the magnitude of voltage obtained inputs in timesharing product circuit together with current value; the signal that timesharing product circuit exports again input power compares the input of output circuit; when the inverse probability of generator is greater than the inverse probability threshold value of setting; power ratio comparatively output circuit exports high level; thus control generator and electrical network cut off, thus effectively protect generator.
Generator voltage of the present utility model and current detecting more stable, guarantee the accuracy that inverse probability detects.
Therefore, the utility model has that accuracy of detection is high, good stability, when the inverse probability of generator is greater than the inverse probability threshold value of setting, can control generator in time and electrical network cuts off, thus effectively protect the feature of generator.
As preferably, also comprise current comparison circuit, the output of current detection circuit is electrically connected with the input of current comparison circuit, and the output of current comparison circuit is electrically connected with the alarm lamp be located on housing.
The current value that current detection circuit detects by current comparison circuit compares with the current threshold preset, and when the current value of detection is greater than current threshold, alarm lamp lights, thus reminds the timely manual intervention of staff, guarantees the safe operation of generator.
As preferably, also comprise inverse probability threshold regulating circuit, the output of inverse probability threshold regulating circuit is electrically connected with the input of power ratio compared with output circuit.
As preferably, also comprise current threshold regulating circuit, the output of current threshold regulating circuit is electrically connected with current comparison circuit input.
As preferably, the current transformer of described first testing circuit and the second testing circuit is all electrically connected with generator by the binding post be located on housing.
As preferably, power ratio comparatively output circuit also comprises time delay regulator potentiometer, and power ratio is electrically connected with electrical network by the output interface be located on housing compared with the output of output circuit.
When the inverse probability of generator is greater than the inverse probability threshold value of setting, power ratio does not export the signal that cuts off of connection between electrical network immediately compared with output circuit, after postponing certain hour, power ratio just exports compared with output circuit the signal that the connection between electrical network cuts off, and adds the reliability of relay.
Therefore; the utility model has following beneficial effect: have over-current detection and warning function, and accuracy of detection is high, stability and good reliability, when the inverse probability of generator is greater than the inverse probability threshold value of setting; generator can be controlled in time and electrical network cuts off, thus effectively protect generator.
Accompanying drawing explanation
Fig. 1 is a kind of theory diagram of the present utility model;
Fig. 2 is a kind of circuit diagram of current detection circuit of the present utility model;
Fig. 3 is a kind of circuit diagram of power ratio of the present utility model compared with output circuit;
Fig. 4 is a kind of circuit diagram of voltage detecting circuit of the present utility model;
Fig. 5 is a kind of circuit diagram of current comparison circuit of the present utility model;
Fig. 6 is a kind of circuit diagram of current threshold regulating circuit of the present utility model;
Fig. 7 is a kind of circuit diagram of timesharing product circuit of the present utility model;
Fig. 8 is a kind of circuit diagram of inverse probability threshold regulating circuit of the present utility model.
In figure: current detection circuit 1, voltage detecting circuit 2, timesharing product circuit 3, power ratio be output circuit 4, output interface 5, first testing circuit 6, second testing circuit 7, current transformer 8, amplifier 9, inverter 10, divider resistance 11, alarm lamp 12, inverse probability threshold regulating circuit 13, current threshold regulating circuit 14, binding post 15, time delay regulator potentiometer 16, current comparison circuit 17 comparatively.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is further described.
Embodiment is as shown in Figure 1 a kind of reverse-power relay, comprises housing, is located at the current detection circuit 1 in housing, voltage detecting circuit 2, timesharing product circuit 3 as shown in Figure 7, power ratio comparatively output circuit 4 as shown in Figure 3; Current detection circuit and voltage detecting circuit are all electrically connected with the input of timesharing product circuit, the output of timesharing product circuit is electrically connected with the input of power ratio compared with output circuit, and power ratio is electrically connected with electrical network by the output interface 5 be located on housing compared with the output of output circuit;
As shown in Figure 2, current detection circuit comprises the first testing circuit 6 and the second testing circuit 7, first testing circuit and the second testing circuit and includes the current transformer 8 and 2 amplifiers 9 of connecting successively; 2 current transformers are all electrically connected with generator by binding post;
As shown in Figure 4, voltage detecting circuit comprises and 1 of the generator amplifier be connected 9 and 2 inverters 10; Also comprise the 4 groups of divider resistances of connecting successively 11 be connected with other 2 of generator respectively by binding post.
Also comprise current comparison circuit as shown in Figure 5, the output of current detection circuit is electrically connected with the input of current comparison circuit, and the output of current comparison circuit is electrically connected with the alarm lamp 12 be located on housing.
Also comprise inverse probability threshold regulating circuit 13 as shown in Figure 8, the output of inverse probability threshold regulating circuit is electrically connected with the input of power ratio compared with output circuit.
Also comprise current threshold regulating circuit 14 as shown in Figure 6, the output of current threshold regulating circuit is electrically connected with current comparison circuit input.The current transformer of the first testing circuit and the second testing circuit is all electrically connected with generator by the binding post 15 be located on housing.Power ratio comparatively output circuit also comprises time delay regulator potentiometer 16.
The course of work of the present utility model is:
Utilize inverse probability threshold regulating circuit to regulate inverse probability threshold value, utilize current threshold regulating circuit to regulate current threshold;
Utilize current transformer to measure the two-phase in the three-phase current of generator, and amplify through operational amplifier; Utilize the cross streams voltage of voltage detecting circuit to generator to measure, and amplify through operational amplifier; All the other two-phase alternating current pressures of generator access ground by 4 groups of divider resistances of connecting successively.
Detect the magnitude of voltage obtained inputs in timesharing product circuit together with current value; the signal that timesharing product circuit exports again input power compares the input of output circuit; when the inverse probability of generator is greater than the inverse probability threshold value of setting; power ratio comparatively output circuit exports high level; thus control generator and electrical network cut off, thus effectively protect generator.
The current value that current detection circuit detects by current comparison circuit compares with the current threshold preset, and when the current value detected is greater than current threshold, alarm lamp lights, thus reminds the timely manual intervention of staff, guarantees the safe operation of generator.
Do not export the signal that the connection between electrical network is cut off immediately when the inverse probability of generator is greater than the inverse probability threshold value of setting, after postponing certain hour, the connection just between block system relay and electrical network, adds the reliability of relay.
Should be understood that the present embodiment is only not used in restriction scope of the present utility model for illustration of the utility model.In addition should be understood that those skilled in the art can make various changes or modifications the utility model, and these equivalent form of values fall within the application's appended claims limited range equally after the content of having read the utility model instruction.
Claims (6)
1. a reverse-power relay, is characterized in that, comprises housing, is located at the current detection circuit (1) in housing, voltage detecting circuit (2), timesharing product circuit (3), power ratio comparatively output circuit (4); Current detection circuit and voltage detecting circuit are all electrically connected with the input of timesharing product circuit, and the output of timesharing product circuit is electrically connected with the input of power ratio compared with output circuit, and power ratio is electrically connected with electrical network compared with the output of output circuit;
Described current detection circuit comprises the first testing circuit (6) and the second testing circuit (7), and the first testing circuit and the second testing circuit include the current transformer (8) and several amplifiers (9) of connecting successively;
Described voltage detecting circuit comprises and being connected and the amplifier (9) of connecting successively and several inverters (10) with 1 of generator; Also comprise the 4 groups of divider resistances of connecting successively (11) be connected with other 2 of generator respectively.
2. reverse-power relay according to claim 1, it is characterized in that, also comprise current comparison circuit (17), the output of current detection circuit is electrically connected with the input of current comparison circuit, and the output of current comparison circuit is electrically connected with the alarm lamp be located on housing (12).
3. reverse-power relay according to claim 1, is characterized in that, also comprises inverse probability threshold regulating circuit (13), and the output of inverse probability threshold regulating circuit is electrically connected with the input of power ratio compared with output circuit.
4. reverse-power relay according to claim 2, is characterized in that, also comprises current threshold regulating circuit (14), and the output of current threshold regulating circuit is electrically connected with current comparison circuit input.
5. reverse-power relay according to claim 1, is characterized in that, the current transformer of described first testing circuit and the second testing circuit is all electrically connected with generator by the binding post (15) be located on housing.
6. the reverse-power relay according to claim 1 or 2 or 3 or 4 or 5, it is characterized in that, power ratio comparatively output circuit also comprises time delay regulator potentiometer (16), and power ratio is electrically connected with electrical network by the output interface (5) be located on housing compared with the output of output circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520539991.0U CN204886136U (en) | 2015-07-23 | 2015-07-23 | Contrary power relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520539991.0U CN204886136U (en) | 2015-07-23 | 2015-07-23 | Contrary power relay |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204886136U true CN204886136U (en) | 2015-12-16 |
Family
ID=54830468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520539991.0U Expired - Fee Related CN204886136U (en) | 2015-07-23 | 2015-07-23 | Contrary power relay |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204886136U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105978040A (en) * | 2016-06-15 | 2016-09-28 | 苏州汇川技术有限公司 | Intelligent reverse power control system and control method for variable-frequency variable-voltage power supply |
| CN107465169A (en) * | 2017-09-13 | 2017-12-12 | 山东航海电器设备有限公司 | A kind of digital reverse-power relay |
| CN110824906A (en) * | 2019-11-28 | 2020-02-21 | 北京北广科技股份有限公司 | Rapid setting circuit based on fuzzy control strategy |
-
2015
- 2015-07-23 CN CN201520539991.0U patent/CN204886136U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105978040A (en) * | 2016-06-15 | 2016-09-28 | 苏州汇川技术有限公司 | Intelligent reverse power control system and control method for variable-frequency variable-voltage power supply |
| CN105978040B (en) * | 2016-06-15 | 2018-10-09 | 苏州汇川技术有限公司 | Variable-frequency variable-voltage power supply intelligence inverse probability control system and control method |
| CN107465169A (en) * | 2017-09-13 | 2017-12-12 | 山东航海电器设备有限公司 | A kind of digital reverse-power relay |
| CN110824906A (en) * | 2019-11-28 | 2020-02-21 | 北京北广科技股份有限公司 | Rapid setting circuit based on fuzzy control strategy |
| CN110824906B (en) * | 2019-11-28 | 2023-02-10 | 北京北广科技股份有限公司 | Rapid setting circuit based on fuzzy control strategy |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10910812B2 (en) | Method for testing open phase detection system | |
| CN105186227A (en) | Intelligent socket | |
| CN204927711U (en) | Intelligent socket | |
| CN204886136U (en) | Contrary power relay | |
| US10283955B2 (en) | Circuit breaker with current monitoring | |
| CN104638768A (en) | Intelligent power distribution security control terminal based on residential electricity consumption | |
| CN107144757B (en) | On-line monitoring device and method for oil flow speed of gas relay | |
| CN102761097A (en) | Direct current leakage protective circuit | |
| JP6509029B2 (en) | Distribution board | |
| CN206685891U (en) | Current limliting earth leakage protective device | |
| CN204214991U (en) | A kind of equipment and system of testing electronic mutual inductor polarity | |
| CN201449437U (en) | Voltage-withstanding tester with high-voltage protective circuit | |
| CN105353181A (en) | Electric power metering device | |
| CN204706873U (en) | A kind of overvoltage protective device for current transformer secondary side with detection control apparatus | |
| CN101330206A (en) | Method for measuring distance of transmission line fault | |
| CN208890362U (en) | Electric motor protective device and air-conditioning | |
| CN204216568U (en) | A kind of motor protecter | |
| CN204205547U (en) | A kind of current foldback circuit for large power supply input | |
| CN202939760U (en) | Multifunctional electrical fire monitoring detector | |
| CN205070269U (en) | Novel intelligent box -type substation | |
| CN202904290U (en) | Control and protection switch controller with temperature detection function | |
| CN104808085A (en) | Low-voltage reactive compensation overvoltage protection test circuit and overvoltage protection test method | |
| CN103499790A (en) | Online detection device for switching-on/off state of power distribution network | |
| CN104505808B (en) | The insulation monitoring and warning device of deviation compensation with voltage and its voltage deviation compensation method | |
| KR102006186B1 (en) | Digital protective relay |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151216 Termination date: 20190723 |