CN210323284U - Main circuit for testing on-off service life of direct current contactor or relay - Google Patents
Main circuit for testing on-off service life of direct current contactor or relay Download PDFInfo
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- CN210323284U CN210323284U CN201920834271.5U CN201920834271U CN210323284U CN 210323284 U CN210323284 U CN 210323284U CN 201920834271 U CN201920834271 U CN 201920834271U CN 210323284 U CN210323284 U CN 210323284U
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Abstract
The utility model discloses a direct current contactor or relay break-make life test main circuit relates to high-power contactor test technical field. The utility model discloses in: the output end of the low-power charge and discharge source is connected to a test loop; a loop contactor and a tested contactor are connected in series on the test loop; the energy storage capacitor bank device and the resistance load are connected to the test loop in parallel; the terminal of the test loop is connected with a programmable constant current power supply; the output end of the programmable constant current power supply is connected with a third energy storage loop; the third energy storage loop is connected with the energy storage capacitor group device on the test loop. The utility model discloses a low power charge and discharge source presets the charge and discharge to energy storage capacitor group device, sets up DC and steps up load current holding capacity that constant current power supply cooperation resistance load can programme and realize when switching on the steady state, steps up constant current power supply able to programme through DC/DC and changes the electric energy back to energy storage capacitor group to reduce contactor test use cost, energy-concerving and environment-protective, the charges of electricity are low.
Description
Technical Field
The utility model relates to a high-power contactor test technical field especially relates to a direct current contactor or relay break-make life test main circuit.
Background
In electrical engineering, a contactor is often used for a motor as a control object and also used for controlling power loads such as factory equipment, electric heaters, machine tools, various power units and the like because the contactor can rapidly cut off an alternating current and direct current main circuit and can frequently switch on and control a large current control circuit. The contactor has large control capacity, is suitable for frequent operation and remote control, and is one of important elements in an automatic control system.
Various performances of the contactor are also important factors influencing the safety and stability of the circuit, and particularly, the on-off service life of the contactor is correspondingly tested, so that the contactor becomes an important matter; when the on-off service life of the contactor is tested, the traditional circuit testing mode has the disadvantages of high equipment cost and high electricity consumption. The capacity of the contactor to be tested determines the capacity of a test power supply, namely a factory power supply transformer, for example, the power of a 1000V/2000A contactor is 2MW, so that the power distribution capacity of an accessed factory needs at least 2MW, the total power charge of a general factory comprises the sum of the capacity charge and the actual power consumption charge, so that the capacity charge of the 2WM power distribution is about 40W/year, the fixed charge is obtained, the power consumption charge during the test is added, and the energy consumption charge of an air conditioner is further brought by power consumption and heating, so that the total charge is very high.
Disclosure of Invention
The to-be-solved technical problem of the utility model is to provide a direct current contactor or relay break-make life test main circuit to reduce contactor test use cost, energy-concerving and environment-protective, the charges of electricity are low, do not have extra capacity charge basically.
In order to solve the technical problem, the utility model discloses a realize through following technical scheme:
the utility model provides a main circuit for testing the on-off service life of a direct current contactor or a relay, which comprises a 380V three-phase alternating current access circuit, wherein a first control switch is arranged on the three-phase alternating current access circuit; the system comprises a low-power charging and discharging source arranged on the end side of a three-phase alternating current access line; the output end of the low-power charge and discharge source is connected to a test loop; a loop contactor and a tested contactor are connected in series on the test loop; the energy storage capacitor bank device and the resistance load are connected to the test loop in parallel; the terminal of the test loop is connected with a programmable constant current power supply; the output end of the programmable constant current power supply is connected with a third energy storage loop; the third energy storage loop is connected with the energy storage capacitor group device on the test loop.
As a preferred technical scheme of the utility model, the first control switch is an automatic air switch; a rectification output circuit is arranged in the low-power charge-discharge source; the rectification output circuit is a bridge rectification circuit.
As a preferred technical scheme of the utility model, a safety switch component is connected to the test loop; the energy storage capacitor bank device is positioned at one side close to the low-power charging and discharging source.
As a preferred technical scheme of the utility model, the programmable constant current power supply is a boost DC/DC module; the resistance load is arranged at one side close to the programmable constant current power supply; a load branch control switch is arranged on a branch where the resistance load is positioned; the load branch control switch comprises an automatic air switch and a quick control switch.
As a preferred technical solution of the present invention, a diode device is connected to the third energy storage loop; a switch diode is arranged in the diode device.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses a low power charge and discharge source presets the charge and discharge to energy storage capacitor group device, sets up resistive load to set up DC and step up load current holding capacity that constant current power supply cooperation resistive load can programme and realize when switching on the steady state, step up constant current power supply able to programme through DC/DC and change the electric energy back to energy storage capacitor group, thereby reduce contactor test use cost, energy-concerving and environment-protective, the charges of electricity are low, do not have extra capacity basically and charge.
Drawings
Fig. 1 is a schematic structural diagram of a main circuit for testing the on-off service life of a contactor according to the present invention;
wherein: 1-three-wire ac access line; 2-a first control switch; 3-a low power charge and discharge source; 4-a test loop; 5-an energy storage capacitor bank arrangement; 6-a safety switch assembly; 7-a loop contactor; 8-the contactor to be tested; 9-a resistive load; 10-load branch control switch; 11-programmable constant current power supply; 12-a third accumulator circuit; 13-diode arrangement.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The utility model relates to a main circuit for testing the on-off service life of a direct current contactor or a relay, which comprises a 380V three-phase alternating current access circuit 1, wherein a first control switch 2 is arranged on the three-phase alternating current access circuit 1; the system comprises a low-power charging and discharging source 3 arranged at the end side of a three-phase alternating-current access line 1; the output end of the low-power charge-discharge source 3 is connected to the test loop 4; a loop contactor 7 and a tested contactor 8 are connected in series on the test loop 4; the energy storage capacitor bank device 5 and the resistance load 9 are connected to the test loop 4 in parallel; a terminal of the test loop 4 is connected with a programmable constant current power supply 11; the output end of the programmable constant current power supply 11 is connected with a third energy storage loop 12; the third energy storage circuit 12 is connected to the energy storage capacitor bank arrangement 5 on the test circuit 4.
Further, the first control switch 2 is an automatic air switch; a rectification output circuit is arranged in the low-power charge-discharge source 3; the rectification output circuit is a bridge rectification circuit.
Further, a safety switch assembly 6 is connected to the test loop 4; the energy storage capacitor bank device 5 is positioned at one side close to the low-power charging and discharging source 3.
Further, the programmable constant current power supply 11 is a boost DC/DC module; the resistance load 9 is arranged at one side close to the programmable constant current power supply 11; a load branch control switch 10 is arranged on a branch where the resistance load 9 is positioned; the load branch control switch 10 comprises an automatic air switch and a quick control switch, wherein the automatic air switch is a high-speed circuit breaker and is used for realizing overload protection in abnormal conditions; the series control switch realizes the short-time access control of the resistance load, the test process needs to be repeated, and the series control switch cooperates with the programmable constant current power supply to form the test load of the contactor together.
Further, a diode device 13 is connected to the third energy storage circuit 12; a switching diode is provided in the diode device 13.
The utility model discloses in the device, test main circuit key parts and principle:
test objects: the contactor with 100 VDC-1000 VDC and current output range of 50A-2000A, each series of contactor/relay are tested.
Testing points: switch life/capability testing, load capability testing, etc. The programmable switch of the matched control equipment can be automatically operated at regular time and repeated on-off, the use working condition is simulated, and then the contact resistance, the voltage drop, the temperature rise, the on-off time and the like are tested on the basis.
The 380V three-phase alternating current input circuit is adopted, the energy storage capacitor bank device 5 is charged and discharged in a preset mode through the low-power charging and discharging source 3, the safety switch assembly, the loop control contactor and the tested contactor are arranged on the test loop 4, the resistance load 9 is arranged, and the electric energy is converted back to the energy storage capacitor bank through the DC/DC boosting programmable constant current power supply 11, so that the test use cost of the contactor is reduced, the energy is saved, the environment is protected, the electricity charge is low, and no extra capacity charge exists basically.
The low-power charging and discharging source 3 charges and discharges energy to the energy storage capacitor by adopting a rectifying circuit, and slowly charges and discharges the voltage of the energy storage capacitor group to reach a preset value according to the voltage requirement; during operation the required amount of power is replenished, the required power being determined by system losses, which in addition to the DC/DC supply also include short term on average losses of the resistive load 9.
The energy storage capacitor bank device 5 is used for storing energy to provide short-time high-power supply capacity and is similar to a water storage tank.
The programmable constant current power supply 11 adopts a boost DC/DC module and is used for realizing load current holding capacity in a conduction steady state by matching with the resistance load 9.
The programmable constant-current power supply 11 adopts a boosting DC/DC module, and can also be used for feeding back electric energy to the test circuit 4 through the diode device 13 and the third energy storage circuit 12, so that energy recycling is realized;
a resistance load 9 which acts as a load instantly during the closing/opening process of the contactor; the continuous load process is completed by the boost DC/DC module.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (5)
1. The utility model provides a direct current contactor or relay break-make life test main circuit which characterized in that:
the power supply comprises a 380V three-phase alternating current access line (1), wherein a first control switch (2) is arranged on the three-phase alternating current access line (1);
the system comprises a low-power charging and discharging source (3) arranged at the end side of a three-phase alternating current access line (1);
the output end of the low-power charge and discharge source (3) is connected into a test loop (4);
a loop contactor (7) and a tested contactor (8) are connected to the test loop (4) in series;
the energy storage capacitor bank device (5) and the resistance load (9) are connected to the test loop (4) in parallel;
a terminal of the test loop (4) is connected with a programmable constant current power supply (11);
the output end of the programmable constant current power supply (11) is connected with a third energy storage loop (12);
the third energy storage loop (12) is connected with an energy storage capacitor bank device (5) on the test loop (4).
2. The main circuit for testing the on-off service life of the direct current contactor or the relay according to claim 1, is characterized in that:
the first control switch (2) is an automatic air switch;
a rectification output circuit is arranged in the low-power charge and discharge source (3);
the rectification output circuit is a bridge rectification circuit.
3. The main circuit for testing the on-off service life of the direct current contactor or the relay according to claim 1, is characterized in that:
a safety switch assembly (6) is connected to the test loop (4);
the energy storage capacitor bank device (5) is positioned at one side close to the low-power charging and discharging source (3).
4. The main circuit for testing the on-off service life of the direct current contactor or the relay according to claim 1, is characterized in that:
the programmable constant current power supply (11) is a boosting DC/DC module;
the resistance load (9) is arranged at one side close to the programmable constant current power supply (11);
a load branch control switch (10) is arranged on a branch where the resistance load (9) is located;
the load branch control switch (10) comprises an automatic air switch and a quick control switch.
5. The main circuit for testing the on-off service life of the direct current contactor or the relay according to claim 1, is characterized in that:
a diode device (13) is connected to the third energy storage loop (12);
and a switch diode is arranged in the diode device (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920834271.5U CN210323284U (en) | 2019-06-04 | 2019-06-04 | Main circuit for testing on-off service life of direct current contactor or relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920834271.5U CN210323284U (en) | 2019-06-04 | 2019-06-04 | Main circuit for testing on-off service life of direct current contactor or relay |
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| CN210323284U true CN210323284U (en) | 2020-04-14 |
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| CN201920834271.5U Active CN210323284U (en) | 2019-06-04 | 2019-06-04 | Main circuit for testing on-off service life of direct current contactor or relay |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113447808A (en) * | 2021-08-31 | 2021-09-28 | 江苏正泰泰杰赛智能科技有限公司 | Intelligent household switch module testing tool system and testing method |
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2019
- 2019-06-04 CN CN201920834271.5U patent/CN210323284U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113447808A (en) * | 2021-08-31 | 2021-09-28 | 江苏正泰泰杰赛智能科技有限公司 | Intelligent household switch module testing tool system and testing method |
| CN113447808B (en) * | 2021-08-31 | 2021-11-19 | 江苏正泰泰杰赛智能科技有限公司 | Intelligent household switch module testing tool system and testing method |
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