CN111474917A - Temperature limiter test board - Google Patents
Temperature limiter test board Download PDFInfo
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- CN111474917A CN111474917A CN202010299734.XA CN202010299734A CN111474917A CN 111474917 A CN111474917 A CN 111474917A CN 202010299734 A CN202010299734 A CN 202010299734A CN 111474917 A CN111474917 A CN 111474917A
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- 238000012360 testing method Methods 0.000 title claims abstract description 55
- 238000010438 heat treatment Methods 0.000 claims abstract description 37
- 238000001514 detection method Methods 0.000 claims abstract description 19
- 239000000523 sample Substances 0.000 claims abstract description 6
- 238000005192 partition Methods 0.000 claims description 7
- 230000009471 action Effects 0.000 claims description 5
- 238000009413 insulation Methods 0.000 claims description 5
- 239000011521 glass Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
- G05B23/0208—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterized by the configuration of the monitoring system
- G05B23/0213—Modular or universal configuration of the monitoring system, e.g. monitoring system having modules that may be combined to build monitoring program; monitoring system that can be applied to legacy systems; adaptable monitoring system; using different communication protocols
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/24—Pc safety
- G05B2219/24065—Real time diagnostics
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The invention discloses a temperature limiter test board which comprises a box body and a temperature control device arranged in the box body, wherein an opening at the upper end of the box body is provided, a box cover is movably connected to the opening of the box body, an inner container is arranged at the upper part in the box body, the opening at the upper end of the inner container is provided and communicated with the opening of the box body, a detection disc is arranged at the opening of the inner container in a covering mode, a heating assembly is arranged below the detection disc, the temperature control device comprises a leakage switch, a switching power supply, a temperature unit and a P L C control unit, the input end of the leakage switch is connected with mains supply, the output end of the leakage switch is respectively connected with the switching power supply and the heating assembly in a power supply mode, the switching power supply is connected with the P L C control unit in a power supply mode, the temperature unit is connected with the P L C control unit in a communication mode, a probe of.
Description
Technical Field
The invention relates to the field of test equipment, in particular to a temperature limiter test board.
Background
The temperature limiter is a temperature sensing controller, the temperature is lower than or higher than a certain threshold value under the normal working condition, and when the temperature of the equipment is lower than or higher than the certain temperature threshold value, the temperature limiter executes actions. At present, manufacturers of temperature limiters still use traditional testing equipment for testing the temperature limiters, and the traditional testing equipment generally comprises a temperature controller, a heating element and a box body. Since the test temperature needs to be manually controlled, the conventional test apparatus has the following problems: the temperature control precision is poor, the temperature setting is inconvenient, and if the temperature control experience of workers is insufficient, overshoot can occur during temperature rise to cause test errors. Additionally, conventional testing equipment is often suitable for spot checks, and when products need to be fully checked, the number of tests per round is small and the efficiency is low.
It is seen that improvements and enhancements to the prior art are needed.
Disclosure of Invention
In view of the defects of the prior art, the invention aims to provide a temperature limiter test board, which aims to improve the temperature control precision and avoid causing test errors.
In order to achieve the purpose, the invention adopts the following technical scheme:
a temperature limiter test board comprises a box body and a temperature control device arranged in the box body, wherein an opening at the upper end of the box body is provided, a box cover is movably connected to the opening of the box body, an inner container is arranged at the upper portion in the box body, the opening at the upper end of the inner container is provided and communicated with the opening of the box body, a detection disc is arranged at the opening of the inner container in a covering mode, a heating assembly is arranged below the detection disc, the temperature control device comprises a leakage switch, a switch power supply, a temperature unit and a P L C control unit, the input end of the leakage switch is connected with mains supply, the output end of the leakage switch is respectively connected with the switch power supply and the heating assembly in a power supply mode, the switch power supply is used for rectifying the mains supply into direct current and supplying the direct current to a P L C control unit, the temperature unit is used for collecting the temperature of the heating assembly and feeding back to the P L C control unit, a probe of the temperature unit is arranged in the inner container.
The temperature limiter test board comprises a temperature control device and a solid-state relay, wherein one end of a control part of the solid-state relay is electrically connected with a P L C control unit, the other end of the control part of the solid-state relay is electrically connected with a positive output end of a switching power supply, one end of an action part of the solid-state relay is electrically connected with a heating assembly, and the other end of the action part of the solid-state relay is electrically connected with a live wire output end of a leakage switch.
The temperature limiter test board is characterized in that a fuse is arranged at the live wire output end of the leakage switch in series.
The temperature limiter test board is characterized in that a control panel is arranged outside the box body, a display unit and a control button are arranged on the control panel, the display unit and the control button are respectively and electrically connected with the P L C control unit, the display unit is used for displaying a temperature curve according to information fed back by the P L C control unit, and the control button is used for controlling the starting and stopping of the temperature control device.
The temperature limiter test board is characterized in that a power indicator and a working indicator are further arranged on the control panel, the power indicator and the working indicator are respectively and electrically connected with the P L C control unit, the power indicator is used for indicating whether the temperature control device is powered by a power supply, and the working indicator is used for indicating whether the temperature control device operates.
The temperature limiter test board is characterized in that a lower limit alarm and an upper limit alarm are further arranged on the control panel and are electrically connected with the P L C control unit respectively, the lower limit alarm is used for reminding whether the temperature reaches a lower limit value, and the lower limit alarm is used for reminding whether the temperature reaches an upper limit value.
The temperature limiter test board is characterized in that the control button comprises a start button and a stop button; the start button is used for starting the temperature control device to operate, and the stop button is used for stopping the operation of the temperature control device.
The temperature limiter test board is characterized in that a partition board is transversely arranged in the box body, the partition board divides the interior of the box body into an upper layer and a lower layer, the inner container is arranged on the upper layer of the box body, the lower layer of the box body is provided with an electric appliance cabinet, and the temperature control device is arranged in the electric appliance cabinet.
The temperature limiter test board is characterized in that a heat insulation layer is filled between the inner container and the upper layer of the box body.
The temperature limiter test board is characterized in that the heating component comprises a plurality of heating pipes, the heating pipes are arranged at the bottom of the inner container at equal intervals, and the heating pipes are electrically connected in parallel.
Has the advantages that:
the invention provides a temperature limiter test board, which is characterized in that a P L C control unit and a temperature unit are arranged, the temperature unit is used for feeding back the temperature change of a box inner container to the P L C control unit, the P L C control unit controls a heating assembly to work according to feedback information so as to regulate and control the temperature, compared with manual temperature control, the temperature control is more accurate, the reaction speed is high, and the test error caused by overhigh temperature is avoided.
Drawings
FIG. 1 is a schematic structural diagram of a temperature limiter test board according to the present invention.
FIG. 2 is a schematic side view of a temperature limiter test bench according to the present invention.
FIG. 3 is a schematic top view of a temperature limiter test stand according to the present invention.
Fig. 4 is a schematic connection diagram of the temperature control device according to the present invention.
The main element symbols indicate that 100-box body, 110-box cover, 111-hinge, 112-supporting hinge, 113-handle, 114-double-layer glass, 120-inner container, 130-detection plate, 140-partition plate, 150-electric appliance cabinet, 200-temperature control device, 210-leakage switch, 220-switching power supply, 230-temperature unit, 231-probe, 240-P L C control unit, 250-solid-state relay, 260-fuse, 300-heating component, 310-heating pipe, 400-control panel, 410-display unit, 420-control button, 421-start button, 422-stop button, 431-power indicator, 432-work indicator, 441-lower limit alarm, 442-upper limit alarm, 500-heat insulation layer, 600-ground foot and 700-universal wheel.
Detailed Description
The invention provides a temperature limiter test board, which is further described in detail below by referring to the attached drawings and embodiments in order to make the purpose, technical scheme and effect of the invention clearer and clearer. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the scope of the invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other suitable relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Referring to fig. 1-4, the invention provides a temperature limiter test bench, which comprises a box body 100 and a temperature control device 200 arranged in the box body 100, wherein an opening at the upper end of the box body 100 is provided, a box cover 110 is movably connected at an opening of the box body 100 through a hinge 111, an inner container 120 is arranged at the upper part in the box body 100, the opening at the upper end of the inner container 120 is provided and communicated with the opening of the box body 100, a detection disc 130 is arranged at the opening of the inner container 120 in a covering manner, a heating assembly 300 is arranged below the detection disc 130, the temperature control device 200 comprises an electric leakage switch 210, a switching power supply 220, a temperature unit 230 and a P L C control unit 240, the input end of the electric leakage switch 210 is connected with a mains supply, the output end of the electric leakage switch 210 is respectively electrically connected with the switching power supply 220 and the heating assembly 300, the switching power supply 220 is used for rectifying the mains supply into direct current and supplying the direct current to the P L C control unit 240, the temperature unit 230 is used for collecting the temperature of the heating assembly 300 and feeding back to the P L C control unit 240 according to working temperature information of the heating assembly L C control unit 300.
In application, an operator opens the box cover 110, a plurality of temperature limiters to be detected are placed on the detection disc 130 in a neatly distributed mode, 200 temperature limiters can be placed at most in practical operation, the box cover 110 is covered after the placement is finished, a temperature limiter test bench is started, commercial power supplies power to the heating assembly 300 and the switching power supply 220 through the leakage switch 210, the switching power supply 220 converts alternating current into direct current for controlling the power of the P L C control unit 240, after the heating assembly 300 starts to work, the temperature in the inner container 120 is gradually increased, the detection disc 130 is heated in an air-isolated mode, during the heating period, the temperature unit 230 continuously obtains the temperature in the inner container 120 through the probe 231 and feeds the temperature back to the P L C control unit 240, the P L C control unit 240 monitors the temperature change constantly, when the temperature reaches a preset temperature, the P L C control unit 240 stops the heating assembly 300 to work, the temperature limiters on the detection disc 130 complete detection, and the worker can take out the temperature limiters.
Through the arrangement, the P L C control unit 240 is matched with the temperature unit 230 to realize temperature control, manual temperature control of workers is not needed, the preset temperature required by detection is gradually reached, the temperature control precision is greatly improved, the test error is reduced, meanwhile, the operation is simplified, in addition, the structure of the box body 100 and the inner container 120 is adopted, the number of products is large in one-time test, the realization of full detection is facilitated, and the detection efficiency is improved.
Specifically, the-terminal of the 0CH area, the V-terminal of the 100CH area, and the COM terminal of the P L C control unit 240 are all connected to the negative output terminal of the switching power supply 220, and the + terminal of the 0CH area and the V + terminal of the 100CH area of the P L C control unit 240 are connected to the positive output terminal of the switching power supply 220, the dc voltage rectified by the switching power supply 220 is preferably 24V.
Preferably, the probe 231 is disposed at the bottom of the test tray 130 to improve temperature control accuracy.
Preferably, the P L C control unit 240 is an ohilon P L C, and the specific model can be CP1E-N30SDT-D, and in actual wiring, the temperature unit 230 can be an expansion module of the P L C control unit 240, and the temperature unit 230 is connected with an expansion port on the P L C control unit 240.
Referring to fig. 4, in some embodiments, the temperature control device 200 further includes a solid-state relay 250, one end of a control portion of the solid-state relay 250 is electrically connected to the P L C control unit 240, and the other end thereof is electrically connected to the positive output terminal of the switching power supply 220, one end of an operation portion of the solid-state relay 250 is electrically connected to the heating element 300, and the other end thereof is electrically connected to the live output terminal of the leakage switch 210, specifically, one end of the control portion of the solid-state relay 250 is connected to the 04 output channel in the 100CH region of the P L C control unit 240, so as to control the solid-state relay 250.
Preferably, a fuse 260 is connected in series to the live wire output end of the leakage switch 210, so as to perform an overcurrent protection function.
Referring to fig. 1 to 4, in some embodiments, a control panel 400 is disposed outside the box 100, a display unit 410 and a control button 420 are disposed on the control panel 400, the display unit 410 and the control button 420 are electrically connected to the P L C control unit 240 respectively, the display unit 410 is configured to display a temperature curve according to information fed back by the P L C control unit 240, an operator can visually see how fast the temperature changes, and the control button 420 is configured to control the start and stop of the temperature control device 200.
Specifically, the display unit 410 may preferably be a touch screen or a display screen, the display screen is connected to the P L C control unit 240 through a communication interface, the control button 420 includes a start button 421 and a stop button 422, the start button 421 is used for starting the operation of the temperature control device 200, the stop button 422 is used for stopping the operation of the temperature control device 200, the start button 421 is configured as a normally open button, one end of the start button 421 is connected to the negative output terminal of the switching power supply 220, and the other end thereof is connected to the 00 input channel of the 0CH area of the P L C control unit 240, the stop button 422 is configured as a normally closed button, the stop button 422 is serially connected to the positive output terminal of the switching power supply 220, and therefore, the positive output terminal of the switching power supply 220 is connected to the P L C control unit 240 and the solid state relay 250 through the stop button 422.
Further, in some embodiments, the control panel 400 is further provided with a power indicator 431 and a work indicator 432, the power indicator 431 and the work indicator 432 are respectively electrically connected with the P L C control unit 240, the power indicator 431 is used for indicating whether the temperature control device 200 is powered by a power source, and the work indicator 432 is used for indicating whether the temperature control device 200 operates, so that an operator can conveniently confirm whether the temperature limiter test board operates normally.
Specifically, one end of each of the power indicator 431 and the operation indicator 432 is connected to the positive output terminal of the switching power supply 220, the other end of the power indicator 431 is connected to the 00 output channel of the 100CH area of the P L C control unit 240, and the other end of the operation indicator 432 is connected to the 01 output channel of the 100CH area of the P L C control unit 240.
Further, in some embodiments, the control panel 400 is further provided with a lower limit alarm 441 and an upper limit alarm 442, the lower limit alarm 441 and the upper limit alarm 442 are preferably sound and light alarms, the lower limit alarm 441 and the upper limit alarm 442 are respectively electrically connected to the P L C control unit 240, the lower limit alarm 441 is used for reminding whether the temperature reaches a lower limit value, and the lower limit alarm 441 is used for reminding whether the temperature reaches an upper limit value.
Specifically, one end of each of the lower limit alarm 441 and the upper limit alarm 442 is connected to the positive output terminal of the switching power supply 220, the other end of the lower limit alarm 441 is connected to a 02 output channel of the 100CH region of the P L C control unit 240, and the other end of the upper limit alarm 442 is connected to a 03 output channel of the 100CH region of the P L C control unit 240.
In practical application, when the test board is cooled down or heated to the lower limit preset temperature, the lower limit alarm 441 reminds a worker to put in a product to be tested, when the test board is heated to the upper limit preset temperature, the upper limit alarm 442 reminds the worker to take out the batch of products, and when the test board to be tested is cooled to the lower limit preset temperature, the next batch of product test can be started. Through the setting, the staff need not to wait that the testboard cools off completely or judges by oneself whether cool off suitable temperature, reminds through lower limit alarm 441 and can confirm the product test that can carry out next batch, avoids artificial erroneous judgement to lead to the test inaccurate, improves detection efficiency simultaneously.
Referring to fig. 1 to 3, further, in some embodiments, a partition 140 is transversely disposed in the box 100, the partition 140 divides the interior of the box 100 into an upper layer and a lower layer, the inner container 120 is disposed on the upper layer of the box 100, the lower layer of the box 100 is disposed with an electrical cabinet 150, and the temperature control device 200 is disposed in the electrical cabinet 150; through reasonable separation setting, avoid temperature variation to influence temperature control device 200's work.
Further, in some embodiments, two sides of the box cover 110 are movably connected with two sides of the box body 100 through support hinges 112, and the support hinges 112 are symmetrically arranged and play a supporting role after the box cover 110 is pulled up, so that a worker does not need to hold the box cover by hands, and the worker can conveniently put in a product to be detected.
Further, in some embodiments, a double glass 114 is embedded in the middle of the box cover 110, the double glass 114 is transparent, and a worker can observe the condition of the product to be detected in the box 100 through the double glass 114.
Preferably, a handle 113 is disposed on a side of the cover 110 opposite to the connecting end to facilitate pulling up the cover 110.
Preferably, the heat insulation layer 500 is filled between the inner container 120 and the upper layer of the box body 100, so that the heat insulation effect is achieved, and the energy consumption of the test bench is reduced.
Preferably, the heating assembly 300 includes a plurality of heating pipes 310, the heating pipes 310 are disposed at equal intervals on the bottom of the inner container 120, the heating pipes 310 are electrically connected in parallel, and the heating pipes 310 are preferably quartz heating pipes 310; through the arrangement, the detection plate 130 is heated uniformly, and the detection precision is improved.
Preferably, the bottom of the box 100 is provided with a plurality of feet 600 and universal wheels 700 at equal intervals, so as to level and move the position of the test platform.
It should be understood that equivalents and modifications of the technical solution and inventive concept thereof may occur to those skilled in the art, and all such modifications and alterations should fall within the protective scope of the present invention.
Claims (10)
1. A temperature limiter test board is characterized by comprising a box body and a temperature control device arranged in the box body, wherein an opening at the upper end of the box body is provided, a box cover is movably connected to the opening of the box body, an inner container is arranged at the upper portion in the box body, the opening at the upper end of the inner container is provided and communicated with the opening of the box body, a detection disc is arranged at the opening of the inner container in a covering mode, a heating assembly is arranged below the detection disc, the temperature control device comprises a leakage switch, a switch power supply, a temperature unit and a P L C control unit, the input end of the leakage switch is connected with mains supply, the output end of the leakage switch is respectively connected with the switch power supply and the heating assembly in a power supply mode, the switch power supply is used for rectifying the mains supply into direct current and supplying the direct current to a P L C control unit, the temperature unit is used for collecting the temperature of the heating assembly and feeding the temperature back to the P L C control unit, a probe of the temperature unit is arranged in the inner container.
2. The temperature limiter test bench according to claim 1, wherein the temperature control device further comprises a solid-state relay, one end of a control portion of the solid-state relay is electrically connected to the P L C control unit, the other end of the control portion of the solid-state relay is electrically connected to a positive output terminal of the switching power supply, one end of an action portion of the solid-state relay is electrically connected to the heating element, and the other end of the action portion of the solid-state relay is electrically connected to a live wire output terminal of the leakage switch.
3. The test bench of claim 2, wherein a fuse is serially connected to the live wire output of the leakage switch.
4. The temperature limiter test bench according to claim 2, wherein a control panel is arranged outside the box body, a display unit and a control button are arranged on the control panel, the display unit and the control button are respectively and electrically connected with the P L C control unit, the display unit is used for displaying a temperature curve according to information fed back by the P L C control unit, and the control button is used for controlling the start and stop of the temperature control device.
5. The temperature limiter test bench according to claim 4, wherein a power indicator and a working indicator are further arranged on the control panel, the power indicator and the working indicator are respectively electrically connected with the P L C control unit, the power indicator is used for indicating whether the temperature control device is powered by a power supply, and the working indicator is used for indicating whether the temperature control device operates.
6. The temperature limiter test board according to claim 4, wherein a lower limit alarm and an upper limit alarm are further arranged on the control panel and are respectively and electrically connected with the P L C control unit, the lower limit alarm is used for reminding whether the temperature reaches a lower limit value, and the lower limit alarm is used for reminding whether the temperature reaches an upper limit value.
7. The temperature limiter test stand of claim 4, wherein said control buttons comprise a start button and a stop button; the start button is used for starting the temperature control device to operate, and the stop button is used for stopping the operation of the temperature control device.
8. The temperature limiter test bench according to claim 1, wherein a partition is transversely disposed in the box body, the partition divides the interior of the box body into an upper layer and a lower layer, the inner container is disposed on the upper layer of the box body, the lower layer of the box body is provided with an electric appliance cabinet, and the temperature control device is disposed in the electric appliance cabinet.
9. The temperature limiter test bench of claim 8, wherein a thermal insulation layer is filled between the inner container and the upper layer of the box body.
10. The temperature limiter test bench of claim 1, wherein the heating assembly comprises a plurality of heating pipes, the heating pipes are arranged on the bottom of the inner container at equal intervals, and the heating pipes are electrically connected in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010299734.XA CN111474917A (en) | 2020-04-16 | 2020-04-16 | Temperature limiter test board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010299734.XA CN111474917A (en) | 2020-04-16 | 2020-04-16 | Temperature limiter test board |
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| CN111474917A true CN111474917A (en) | 2020-07-31 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201004454Y (en) * | 2006-07-13 | 2008-01-09 | 中芯国际集成电路制造(上海)有限公司 | A heating device for semiconductor reliability test with temperature control function |
| CN101140252A (en) * | 2006-09-06 | 2008-03-12 | 中国科学院半导体研究所 | System for testing gas sensors or semiconductor device performance |
| CN104459527A (en) * | 2014-11-28 | 2015-03-25 | 广东华田电器有限公司 | Automatic tester for magnetic steel temperature limiter and testing method thereof |
| CN104614669A (en) * | 2014-12-18 | 2015-05-13 | 广东华田电器有限公司 | Automatic tester of magnetic steel temperature limiter and test method thereof |
| CN104880667A (en) * | 2015-05-22 | 2015-09-02 | 广东省茂名市质量计量监督检测所 | Mobile internet-based magnetic steel temperature limiter remote three-level monitor public detection system |
| CN211827019U (en) * | 2020-04-16 | 2020-10-30 | 佛山市川东磁电股份有限公司 | Temperature limiter test board |
-
2020
- 2020-04-16 CN CN202010299734.XA patent/CN111474917A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201004454Y (en) * | 2006-07-13 | 2008-01-09 | 中芯国际集成电路制造(上海)有限公司 | A heating device for semiconductor reliability test with temperature control function |
| CN101140252A (en) * | 2006-09-06 | 2008-03-12 | 中国科学院半导体研究所 | System for testing gas sensors or semiconductor device performance |
| CN104459527A (en) * | 2014-11-28 | 2015-03-25 | 广东华田电器有限公司 | Automatic tester for magnetic steel temperature limiter and testing method thereof |
| CN104614669A (en) * | 2014-12-18 | 2015-05-13 | 广东华田电器有限公司 | Automatic tester of magnetic steel temperature limiter and test method thereof |
| CN104880667A (en) * | 2015-05-22 | 2015-09-02 | 广东省茂名市质量计量监督检测所 | Mobile internet-based magnetic steel temperature limiter remote three-level monitor public detection system |
| CN211827019U (en) * | 2020-04-16 | 2020-10-30 | 佛山市川东磁电股份有限公司 | Temperature limiter test board |
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