CN201697977U - Mining comprehensive protector on-site tester - Google Patents
Mining comprehensive protector on-site tester Download PDFInfo
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- CN201697977U CN201697977U CN2010201017810U CN201020101781U CN201697977U CN 201697977 U CN201697977 U CN 201697977U CN 2010201017810 U CN2010201017810 U CN 2010201017810U CN 201020101781 U CN201020101781 U CN 201020101781U CN 201697977 U CN201697977 U CN 201697977U
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- comprehensive protector
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Abstract
A mining comprehensive protector on-site tester is provided with an isolating transformer, a primary side of the isolating transformer is provided with a first coil, a switch component is serially connected to one branch of the coil, a secondary side of the isolating transformer is provided with a first coil, a second coil and a third coil, and a fault current adjusting circuit is serially connected to one branch of the first coil, thereby forming a fault current output loop. The second coil forms a zero-sequence voltage output voltage. A zero-sequence current phasing circuit is serially connected to one branch of the third coil to form the zero-sequence current output loop. The mining comprehensive protector on-site tester is directly powered by a voltage transformer in an explosion-proof switch, can provide fault current to test integrity of the testing comprehensive protector, can provide zero-sequence voltage and zero-sequence current to simulate zero-sequence component in case of leakage of a practical system so as to individually verify completeness of leakage function of the comprehensive protector, and has proper control means for timed and manual triggering of faults.
Description
Technical field
The utility model relates to a kind of mining comprehensive protector on-spot tester.
Background technology
In traditional explosion-proof switch, for the test synthesis protector, test button is set all in the mining high-voltage explosion-proof switch, all dispose complicated test loop in each switch.Because the test loop complexity, discrete device is more, is easy to go wrong, and the quality of test loop all can't be verified.And, because test loop and real protection loop link together, directly increased the complexity in loop, be easy to cause the fault of switch.Nowadays, in the automatic improving process, generally use the microcomputer type complex protection device.In view of the microcomputer type comprehensive protector has self-checking function, and the measured value and the quantity of state that can real-time demonstration collect, generally can simplify the wiring in the switch, remove the test loop in the switch.In order to improve the degree of reliability of device operation, can not rely on the self-checking function of device self fully, must carry out the detection in suitable cycle to device.But because the requirement of explosion proof of experimental enviroment, charged drawing outside the explosion-proof switch forbidden in the wiring in the switch, and explosion-proof switch must be closed when switch was charged, so the relay-protection tester that uses on the ground can't use at the scene.At present, in actual application, for device is tested, have only an on-the-spot complex protection device replaced and take ground and test, workload is very big, needs the many wiring in the dismounting switch.This mode can only detect device body, and other loop that can't split the Central Shanxi Plain as carry out the loop, test in the analog input loop.Along with popularizing of the mining comprehensive protector of microcomputer type, more and more need a kind of mining comprehensive protector on-spot tester, can test the comprehensive protection device in the on-the-spot switch, to guarantee that the on-the-spot comprehensive protection device that uses can reliability service.
Summary of the invention
The purpose of this utility model is: at above the deficiencies in the prior art, propose a kind of mining comprehensive protector on-spot tester.
In order to reach the above object: a kind of mining comprehensive protector on-spot tester that the utility model provides, it is characterized in that: have an isolating transformer, the former limit of this isolating transformer has a coil, be in series with switch module on the branch road of this coil, the secondary of described isolating transformer has first coil, second coil, tertiary coil, one branch road of first coil is in series with the fault current regulating circuit, constitutes the fault current output loop; Second coil constitutes the residual voltage output loop; One branch road of tertiary coil is in series with the zero-sequence current phase modulation circuit, constitutes the zero-sequence current output loop.
Aforesaid mining comprehensive protector on-spot tester, described switch module are a kind of in hand switch and the time switch, also can be made up of the hand switch and the time switch of parallel connection.
Aforesaid mining comprehensive protector on-spot tester, described fault current regulating circuit is made up of the fixed resistance and the variable resistor of series connection.
Aforesaid mining comprehensive protector on-spot tester, described zero-sequence current phase modulation circuit has two-way phase modulation branch road, and wherein route electric capacity and variable resistor formation are propped up in first pressure regulation, and variable-resistance slider is connected with electric capacity one end; Variable resistor and inductance that the route series connection is propped up in second pressure regulation constitute.
In order to ensure testing the complex protection device at scene, the volume of this tester must be suitable, can be placed in the explosion-proof switch easily.Because do not have other power supply in the explosion-proof switch, this tester can only be powered by voltage transformer (VT), in order to reduce the power requirement to voltage transformer (VT), the operating voltage of test instrument adopts the line voltage of AC100V.This tester can be exported bigger electric current, is used for testing the defencive function such as short circuit, overcurrent, overload of complex protection device.This test instrument can be exported residual voltage and zero-sequence current, the creepage protection function of the different principle of test complex protection device, and whether the wiring in residual voltage loop and zero-sequence current loop is correct in the detector switch simultaneously.Because the whole test instrument is placed on explosion-proof switch inside, test instrument must have suitable mode of operation, can utilize the button on the explosion-proof switch door to carry out the manual triggers test, also can carry out timing by the time switch that carries on the test instrument and trigger test.
When the former limit input of transformer AC100V voltage, the suitable low-voltage of first coil output, as 3-5V, by the fault current regulating loop, promptly exportable different fault current.Second coil is the residual voltage output loop, is directly connected on the voltage input end of residual voltage input circuit of tested device.Because on-the-spot residual voltage startup value is set to about 15V, when the former limit input of transformer AC100V voltage, the voltage about second coil output 20V gets final product.The 3rd coil is the zero-sequence current output loop, and this coil is connected to by the zero-sequence current phase modulation circuit on the current input terminal of zero-sequence current input circuit of tested device.At the different earthing mode of electrical network, earth leakage protection can be taked the zero sequence active power protection philosophy different with the zero sequence reactive power, and requiring has different phasing degree between residual voltage and the zero-sequence current.By zero-sequence current phase adjusted loop, can export zero-sequence current with respect to the residual voltage different angles, be used for simulating the earth leakage protection under the different earthing modes.
The utility model beneficial effect is as follows:
1, volume is small and exquisite, can easily be placed on the inside of high-voltage explosion-proof switch, at the scene complex protection device is tested;
3, directly by the voltage transformer (VT) in the explosion-proof switch (VT) power supply, solved the tester powerup issue;
3, can provide the integrality of fault current with the test complex protection device;
4, can provide residual voltage and the zero-sequence current simulation real system zero-sequence component in when electric leakage, with the integrality of the leakage function of independent checking complex protection device;
5, have suitable control mode, regularly trigger fault or manual triggers fault;
6, no energy storage components and parts are so that can be convenient for carrying in mining environment.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further described.
Fig. 1 is the circuit theory diagrams of the mining comprehensive protector on-spot tester of the utility model.
Fig. 2 is a fault current regulating circuit of the present utility model.
Fig. 3 is a zero-sequence current phase modulation circuit of the present utility model.
Fig. 4 is the phase diagram of output current behind the utility model phase modulation.
Embodiment
The mining comprehensive protector on-spot tester of present embodiment as shown in Figure 1, it has an isolating transformer T, the former limit of this isolating transformer T has a coil L0, be in series with switch module K on the branch road of this coil L0, the secondary of described isolating transformer T has the first coil L1, the second coil L2, tertiary coil L3, the branch road of the first coil L1 is in series with the fault current regulating circuit, constitutes the fault current output loop; The second coil L2 constitutes the residual voltage output loop; The branch road of tertiary coil L3 is in series with the zero-sequence current phase modulation circuit, constitutes the zero-sequence current output loop.
Voltage transformer (VT) voltage output end in the former limit of described isolating transformer and the explosion-proof switch cabinet is connected; The current output terminal of described fault current output loop is connected with the current input terminal of device being tested electric current input circuit; The voltage output end of described residual voltage output loop is connected with the voltage input end of the residual voltage input circuit of tested device; Described zero-sequence current output loop is connected with the current input terminal of the zero-sequence current input circuit of tested device.
In this example, switch module K is made up of the hand switch K1 and the time switch K2 of parallel connection, can carry out timing by time switch K2 and trigger, and also can utilize hand switch K1 to carry out the manual activation test.Switch module also can adopt hand switch or time switch separately.
As shown in Figure 2, this routine fault current regulating circuit is made up of the fixed resistance R1 and the variable resistor R2 of series connection.By adjusting the resistance sizes of variable resistor R2, control the size of output current, fixed resistance R1 is set in the circuit, guarantee that the fault current loop burns out test instrument when preventing output short-circuit when can export bigger electric current.Owing to need powerful resistance in this fault current regulating circuit, do and powerful variable resistor is difficult, and volume is bigger, but thereby can also adopt the resistance in series of stepping output to substitute variable resistor R2, realize the Current Regulation of fault current regulating circuit.
The amplitude of zero-sequence current and the phase adjusted of Relative Zero sequence voltage are mainly finished in zero-sequence current phase modulation loop.As shown in Figure 3, the zero-sequence current phase modulation circuit has two-way phase modulation branch road, and wherein route capacitor C 1 and variable resistor R3 formation are propped up in first pressure regulation, and the slider of variable resistor R3 is connected with electric capacity one end; Variable resistor R4 and inductance L that the route series connection is propped up in second pressure regulation constitute.Consider that tester is the test to field device, the angle of zero-sequence current Relative Zero sequence voltage is not done large-scale adjustment, the relatively-stationary electric current of output phase.For the different earthing mode of electrical network, select different phase modulation loops.Resistance R 3 and capacitor C 1 can be adjusted between (180 °～-90 °) of residual voltage U0 leakage current with the faulty line of simulation isolated neutral system to zero-sequence current.Resistance R 4 and inductance L 1 can be adjusted to zero-sequence current between (90 °～180 °) of residual voltage U0 with the leakage current of mould with the faulty line of the system after the arc suppression coil over-compensation.The phase place of the output current behind the phase modulation such as Fig. 4.
The applicant also provides the design of a kind of simpler zero-sequence current phase modulation loop, and example replaces variable resistor R3, R4 with fixed resistance, and promptly in the two-way phase modulation branch road of this zero-sequence current phase modulation circuit, electric capacity and fixed resistance that the route parallel connection is propped up in first pressure regulation constitute; Fixed resistance and inductance that the route series connection is propped up in second pressure regulation constitute.The electric current relative fixed that adopts fixed resistance to make output, the requirement that the electric current of output can satisfy device gets final product.
In addition to the implementation, the utility model can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation form, all drop on the protection domain of the utility model requirement.
Claims (9)
1. mining comprehensive protector on-spot tester, it is characterized in that: have an isolating transformer, the former limit of this isolating transformer has a coil, be in series with switch module on the branch road of this coil, the secondary of described isolating transformer has first coil, second coil, tertiary coil, one branch road of first coil is in series with the fault current regulating circuit, constitutes the fault current output loop; Second coil constitutes the residual voltage output loop; One branch road of tertiary coil is in series with the zero-sequence current phase modulation circuit, constitutes the zero-sequence current output loop.
2. mining comprehensive protector on-spot tester according to claim 1 is characterized in that described switch module is a kind of in hand switch and the time switch.
3. mining comprehensive protector on-spot tester according to claim 1 is characterized in that described switch module is made up of the hand switch and the time switch of parallel connection.
4. according to any described mining comprehensive protector on-spot tester of claim 1-3, it is characterized in that described fault current regulating circuit is by the fixed resistance of series connection with stop adjustable adjustable resistance module to be formed.
5. mining comprehensive protector on-spot tester according to claim 4 is characterized in that, but described adjustable resistance module is the resistance in series of variable resistor or stepping output.
6. mining comprehensive protector on-spot tester according to claim 5, it is characterized in that described zero-sequence current phase modulation circuit has two-way phase modulation branch road, wherein route electric capacity and variable resistor formation are propped up in first pressure regulation, and variable-resistance slider is connected with electric capacity one end; Variable resistor and inductance that the route series connection is propped up in second pressure regulation constitute.
7. mining comprehensive protector on-spot tester according to claim 5 is characterized in that described zero-sequence current phase modulation circuit has two-way phase modulation branch road, and wherein the electric capacity and the fixed resistance formation of route parallel connection propped up in first pressure regulation; Fixed resistance and inductance that the route series connection is propped up in second pressure regulation constitute.
8. according to any described mining comprehensive protector on-spot tester of claim 1-3, it is characterized in that the former limit of described isolating transformer is connected with voltage transformer (VT) voltage output end in the explosion-proof switch cabinet; The current output terminal of described fault current output loop is connected with the current input terminal of device being tested electric current input circuit; The voltage output end of described residual voltage output loop is connected with the voltage input end of the residual voltage input circuit of tested device; Described zero-sequence current output loop is connected with the current input terminal of the zero-sequence current input circuit of tested device.
9. according to any described mining comprehensive protector on-spot tester of claim 1-3, it is characterized in that described mining comprehensive protector on-spot tester is positioned over explosion-proof switch cabinet inside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201017810U CN201697977U (en) | 2010-01-26 | 2010-01-26 | Mining comprehensive protector on-site tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201017810U CN201697977U (en) | 2010-01-26 | 2010-01-26 | Mining comprehensive protector on-site tester |
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| Publication Number | Publication Date |
|---|---|
| CN201697977U true CN201697977U (en) | 2011-01-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201017810U Expired - Fee Related CN201697977U (en) | 2010-01-26 | 2010-01-26 | Mining comprehensive protector on-site tester |
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| CN (1) | CN201697977U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110837016A (en) * | 2019-11-19 | 2020-02-25 | 思瑞浦微电子科技（苏州）股份有限公司 | Precision matching resistor array and calibration method thereof |
-
2010
- 2010-01-26 CN CN2010201017810U patent/CN201697977U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110837016A (en) * | 2019-11-19 | 2020-02-25 | 思瑞浦微电子科技（苏州）股份有限公司 | Precision matching resistor array and calibration method thereof |
| CN110837016B (en) * | 2019-11-19 | 2021-09-10 | 思瑞浦微电子科技（苏州）股份有限公司 | Precision matching resistor array and calibration method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: NARI NANJING CONTROL SYSTEM LTD. Free format text: FORMER NAME: NANJING SINO-GERMAN PROTECTION CONTROL SYSTEM CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: Lijing Road, Pukou hi tech Development Zone, Nanjing City, Jiangsu Province, No. 20 210061 Patentee after: SGCC NARI Nanjing Control System Co., Ltd. Address before: Lijing Road, Pukou hi tech Development Zone, Nanjing City, Jiangsu Province, No. 20 210061 Patentee before: Nanjing Sino-German Protection Control System Co., Ltd. |
|
| 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: 20110105 Termination date: 20180126 |