CN203376450U - Solid-state circuit breaker - Google Patents
Solid-state circuit breaker Download PDFInfo
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- CN203376450U CN203376450U CN201320469586.7U CN201320469586U CN203376450U CN 203376450 U CN203376450 U CN 203376450U CN 201320469586 U CN201320469586 U CN 201320469586U CN 203376450 U CN203376450 U CN 203376450U
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Abstract
The utility model relates to the technical field of electrical appliance detection, and discloses a solid-state circuit breaker used for carrying out electrical endurance test on electromechanical contactors and motor starters. The solid-state circuit breaker comprises a central processing system, a current sampling device, a voltage sampling device, an overvoltage protection device and a power electronic device group. The solid-state circuit breaker adopts a circuit breaker based on a full-controlled power electronic device as a contactless switching device, and replaces the existing combination of a contactor and a circuit breaker, thereby enabling turn-off to be quicker and more reliable. The solid-state circuit breaker has functions of overvoltage protection, phase selection closing and voltage regulation, avoids the electric arc burning loss generated when the contactor breaks large current, prolongs the service life of the circuit breaker, and overcomes problems such that the contactor acts as an accompanied testing article, thereby causing severe loss of the accompanied testing article, resulting in poison gas and noise pollutions for a laboratory environment, and the like. The test cost is greatly reduced as the solid-state circuit breaker has the functions of phase selection and voltage regulation simultaneously and replaces the combination of a plurality of components in a traditional test loop.
Description
Technical field
The utility model relates to electrical equipment detection technique field, relates in particular to a kind of solid circuit breaker for electromechanical treadle and motor starter electrical endurance test.
Background technology
Electrical apparatus test is the checking to electrical equipment various performances that should possess under normal operation and failure condition.The electric life of electromechanical treadle and motor starter (AC-3) is tested traditional test loop and is adopted the switching device shifter (be commonly called as and accompany test product) that contactor is power supply, and its shortcoming is to accompany the breaking capacity of test product to be equivalent to more than 20 times of trial target.Yet A.C. contactor development in recent years is very fast, on capacity and operating frequency, is greatly improved.The test of contactor of two 400V 630A of take is example, and some manufacturers bring up to the frequency of AC-3 1200 times/hour.The agreement service test of current A.C. contactor is less than ten thousand times also.What for the durability test of an AC-3, have will carry out (250A and more than) 600,000 times, and what have will carry out (250A is following) 1,500,000 times.Take life-span of 600,000 times is example: often carry out about 20,000 times tests according to present case and change a contactor, add that maintenance can suitably reduce loss, but single test will consume contactor 20-30 platform.If take every contactor as 1500 yuan, the contactor that AC-3 durability test will consume is amounted to approximately 40,000 yuans.
Above-mentioned AC-3 tests, and has the problem of the following aspects: 1, accompany the loss of test product contactor too large, change contactor and bring very large workload, the experimentation cost costliness; 2, the toxic gases such as Agcdo, the taste that the contact of contactor produces when disjunction is unpleasant and human body is had to very large injury; 3, the noise of the contactor of high frequency action makes the test for contamination working environment; 4, the technology that choosing mainly adopts with checkout equipment is by mechanical switch, by manually-operated, realizes.Traditional mechanical switch can't realize opening arbitrarily the control of angle and output waveform.
The utility model content
The purpose of this utility model is to provide a kind of solid circuit breaker, to solve in the electrical endurance test of contactor and trigger, accompany the test product loss serious, experimentation cost is high, the phase-controlled function is used the mechanical switch manually-operated, easily pollute laboratory environment, bring the problem of potential safety hazard to operating personnel.
For solving the problems of the technologies described above, technical solution adopted in the utility model is as follows:
A kind of solid circuit breaker, it comprises center processing system, current sampling device, voltage sampling apparatus, over-pressure safety device, it also comprises the power electronic devices group, an input end of described center processing system is connected with an output terminal of power electronic devices group, another output terminal of described power electronic devices group is connected with the input end of described current sampling device, and the input end of described power electronic devices group is connected with power supply; Another input end of described center processing system is connected with the output terminal of voltage sample A/D converter, the input end of described voltage sample A/D converter is connected with an output terminal of described voltage sampling apparatus, and another output terminal of described voltage sampling apparatus is connected with the input end of described current sampling device; The output terminal of described over-pressure safety device is connected with the input end of described current sample; the output terminal of described current sampling device is connected with the input end of current sample A/D converter; the output terminal of described current sample A/D converter is connected with an end of described center processing system, and another output terminal of described current sampling device is connected with load.
As of the present utility model, further improve, described power electronic devices group comprises the gate-drive module, power diode, all-controlling power electronics device FCD, the anode of the first power diode D1 is connected with the negative electrode of the first all-controlling power electronics device FCD1, the anode of the second power diode D2 is connected with the negative electrode of the second all-controlling power electronics device FCD2, the negative electrode of the 3rd power diode D3 is connected with the anode of the 3rd all-controlling power electronics device FCD3, the negative electrode of the first power diode D4 is connected with the anode of the 4th all-controlling power electronics device FCD4, after above-mentioned four groups of series circuit parallel connections, with described gate-drive module, be connected again, described gate-drive module is connected with described center processing system.
Further improve as of the present utility model, be provided with heating radiator, temperature control sensor on described power electronic devices FCD, described heating radiator is connected with described temperature control sensor.
As further improvement of the utility model, described center processing system is connected with communication module, and described communication module is connected with host computer.
Principle of work of the present utility model is: the utility model is accessed in the electrical apparatus test loop, the current signal that current sampling device gathers is transferred to the center processing system by the current sample A/D converter, described center processing system is according to the di/dt(current changing rate of the current waveform of adopting) make and whether transshipping or the judgement of short circuit in conjunction with test current, if there is fault to occur, the center processing system is sent cut-off signals to the gate-drive module, described gate-drive module controls power electronic devices group breaking circuit.Owing to having adopted the power electronic devices group, make the shutoff of circuit more fast, reliable.
The utility model has adopted over-pressure safety device, can absorb the spike that electrical apparatus test produces, to test loop and the utility model to protect reliably.
The utility model has been equipped with voltage sampling apparatus, voltage sample A/D converter, voltage sampling signal can be transferred to host computer, judge the virtual voltage phase waveform by host computer, control in conjunction with the phase angle of testing requirements that the trigger pulse input control closes angle again and the purpose that reaches phase selection also can be controlled the adjusting that realize voltage/current according to phase angle simultaneously.
The utility model has the function of isolating switch, phase-selecting switch simultaneously, and electric life is long, so successfully replaced the combination of isolating switch in electrical equipment examination loop and contactor, phase-selecting switch.
Adopted the power electronic devices group in the utility model, described power electronic devices group is constituted by the series, parallel of power diode and power electronic devices, can need adopt different all-controlling power electronics devices according to experiment, wherein all-controlling power electronics device can be: IGCT (integrated gate commutated thyristor), GTO (gate level turn-off thyristor), GTR (power transistor), MOSFET (field of electric force effect transistor), IGBT (igbt), MCT(MOS control thyristor) etc. multiple different model.
When working, can cause device heating, intensification due to power electronic devices because of power attenuation, device temperature is too high will shorten its life-span, even burn, and therefore for power electronic devices, be equipped with temperature control sensor and heating radiator.
The utility model has adopted communication module, can be connected to host computer by communication module and realize Long-distance Control, because communication module is supported PROFIBUS bus, MODBUS bus protocol, DEVICENET bus etc., make Long-distance Control of the present utility model more flexible.
The beneficial effects of the utility model are: because the utility model has adopted isolating switch based on all-controlling power electronics device as noncontacting switch electrical equipment, substituted used contactor and isolating switch combination, make shutoff more rapidly, reliable.The utlity model has that overvoltage protection, choosing close mutually, the function of voltage-regulation; The electrical arc erosion of having avoided contactor to produce when the large electric current of disjunction, extended serviceable life of isolating switch, overcome contactor do accompany test product and cause accompany the test product loss serious, laboratory environment is caused to the problems such as poison gas, noise pollution; Because the utility model has the phase of choosing, voltage regulation function simultaneously, replaced the combination of a plurality of elements in traditional experiment loop, experimentation cost greatly reduces.
The accompanying drawing explanation
Fig. 1 is single-phase control system figure of the present utility model;
Fig. 2 is the connection diagram of power electronic devices group;
Fig. 3 is the connection block diagram of all-controlling power electronics device;
In figure: 1, current sampling device, 2, the current sample A/D converter, 3, the center processing system; 4, communication module, 5, heating radiator, 6, the power electronic devices group; 7, gate-drive module; 8, temperature control sensor, 9, the voltage sample A/D converter, 10, voltage sampling apparatus; 11, over-pressure safety device; 12, power supply, 13, power diode, 14, all-controlling power electronics device.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
A kind of solid circuit breaker as described as Fig. 1 to Fig. 3, it comprises center processing system 3, current sampling device 1, voltage sampling apparatus 10, over-pressure safety device 11, it also comprises power electronic devices group 6, an input end of center processing system 3 is connected with an output terminal of power electronic devices group 6, another output terminal of power electronic devices group 6 is connected with the input end of current sampling device 1, and the input end of power electronic devices group 6 is connected with power supply 12; Another input end of center processing system 3 is connected with the output terminal of voltage sample A/D converter 9, the input end of voltage sample A/D converter 9 is connected with an output terminal of voltage sampling apparatus 10, and another output terminal of voltage sampling apparatus 10 is connected with the input end of current sampling device 1; The output terminal of over-pressure safety device 11 is connected with the input end of current sample 1; an output terminal of current sampling device 1 is connected with the input end of current sample A/D converter 2; the output terminal of current sample A/D converter 2 is connected with an end of center processing system 3, and another output terminal of current sampling device 1 is connected with load.
Power electronic devices group 6 comprises gate-drive module 7, power diode 13, all-controlling power electronics device FCD14, the anode of the first power diode D1 is connected with the negative electrode of the first all-controlling power electronics device FCD1, the anode of the second power diode D2 is connected with the negative electrode of the second all-controlling power electronics device FCD2, the negative electrode of the 3rd power diode D3 is connected with the anode of the 3rd all-controlling power electronics device FCD3, the negative electrode of the first power diode D4 is connected with the anode of the 4th all-controlling power electronics device FCD4, after above-mentioned four groups of series circuit parallel connections, with gate-drive module 7, be connected again, gate-drive module 7 is connected with center processing system 3.
Be provided with heating radiator 5, temperature control sensor 8 on power electronic devices FCD14, heating radiator 5 is connected with temperature control sensor 8.
The utility model is accessed in the electrical apparatus test loop, its short-circuit protection is to gather current signal by electric power sampling apparatus 1, transfer signals to center processing system 3 by current sample A/D converter 2, center processing system 3 is according to the di/dt(current changing rate of current waveform) make the judgement of whether short circuit or overload in conjunction with test current, if there is fault, drive gate pole driver module 7 by power electronic devices group 6 breaking circuits; The short circuit cut-off current also can be transferred to center processing system 3 by communication module 4 by control signal by host computer and realize setting.
Voltage protection function is realizing by the spike that absorbs electrical apparatus test and produce by over-pressure safety device 11;
Phase-selecting function is according to by voltage sampling apparatus 10, the voltage signal collected being transferred to center processing system 3 by voltage sample A/D converter 9, center processing system 3 is transferred to host computer by signal by communication module 4, by host computer, coordinate related software, by communication module 4, processing signals is transferred to center processing system 3 again, center processing system 3 control trigger pulses are controlled and are closed the input angle, thereby reach the purpose of phase selection, also can realize the adjusting of voltage/current simultaneously.
Claims (4)
1. a solid circuit breaker, it comprises center processing system (3), current sampling device (1), voltage sampling apparatus (10), over-pressure safety device (11), it is characterized in that: it also comprises power electronic devices group (6), an input end of described center processing system (3) is connected with an output terminal of described power electronic devices group (6), another output terminal of described power electronic devices group (6) is connected with the input end of described current sampling device (1), and the input end of described power electronic devices group (6) is connected with power supply (12); Another input end of described center processing system (3) is connected with the output terminal of voltage sample A/D converter (9), the input end of described voltage sample A/D converter (9) is connected with an output terminal of described voltage sampling apparatus (10), and another output terminal of described voltage sampling apparatus (10) is connected with the input end of described current sampling device (1); The output terminal of described over-pressure safety device (11) is connected with the input end of described current sample (1); an output terminal of described current sampling device (1) is connected with the input end of current sample A/D converter (2); the output terminal of described current sample A/D converter (2) is connected with an end of described center processing system (3), and another output terminal of described current sampling device (1) is connected with load.
2. solid circuit breaker according to claim 1, it is characterized in that: described power electronic devices group (6) comprises gate-drive module (7), power diode (13), all-controlling power electronics device FCD(14), the anode of the first power diode D1 is connected with the negative electrode of the first all-controlling power electronics device FCD1, the anode of the second power diode D2 is connected with the negative electrode of the second all-controlling power electronics device FCD2, the negative electrode of the 3rd power diode D3 is connected with the anode of the 3rd all-controlling power electronics device FCD3, the negative electrode of the first power diode D4 is connected with the anode of the 4th all-controlling power electronics device FCD4, after above-mentioned four groups of series circuit parallel connections, with described gate-drive module (7), be connected again, described gate-drive module (7) is connected with described center processing system (3).
3. solid circuit breaker according to claim 1 and 2, it is characterized in that: be provided with heating radiator (5), temperature control sensor (8) described power electronic devices FCD(14), described heating radiator (5) is connected with described temperature control sensor (8).
4. solid circuit breaker according to claim 1, it is characterized in that: described center processing system (3) is connected with communication module (4), and described communication module (4) is connected with host computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320469586.7U CN203376450U (en) | 2013-08-02 | 2013-08-02 | Solid-state circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320469586.7U CN203376450U (en) | 2013-08-02 | 2013-08-02 | Solid-state circuit breaker |
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| Publication Number | Publication Date |
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| CN203376450U true CN203376450U (en) | 2014-01-01 |
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| CN201320469586.7U Expired - Fee Related CN203376450U (en) | 2013-08-02 | 2013-08-02 | Solid-state circuit breaker |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9343897B2 (en) | 2014-07-07 | 2016-05-17 | General Electric Company | Circuit breaker system and method |
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2013
- 2013-08-02 CN CN201320469586.7U patent/CN203376450U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9343897B2 (en) | 2014-07-07 | 2016-05-17 | General Electric Company | Circuit breaker system and method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140101 Termination date: 20150802 |
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| EXPY | Termination of patent right or utility model |