Power supply transformer no-load and load characteristics test, frequency doubling-induction test and power frequency voltage withstand test on the tested transformer
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The design purpose of this equipment is for the factory electrical testing of three-phase asynchronous motors and DC motors. Through automated testing, it determines whether the motor products meet the control standards of the tested items and issues a test report.
This equipment is designed for testing low-voltage squirrel-cage three-phase asynchronous motors, wound-rotor three-phase asynchronous motors, and DC motors.
Three-phase asynchronous motor testing includes: DC resistance testing, insulation resistance testing, inter-turn insulation testing, power frequency withstand voltage testing, and no-load testing.
DC motor testing includes: no-load testing.
product names：motor comprehensive test bench, motor test bench, DC motor comprehensive test bench, motor comprehensive test system, AC motor comprehensive test bench
The testing scope of this test bench is as follows:
Test motor types and parameters:
Low voltage squirrel cage three-phase asynchronous motor,wound rotor three-phase asynchronous motor,DC motor:
| Low voltage motor | 110V/220V/380V/440V/460V/480V/600V: power range 0.37kW~746kW; (test frequency 50Hz/60Hz) | |
| DC Motor | Armature voltage: DC 10-800V, current: 1~ 100A | |
| Excitation voltage: DC10-300V, current: 1~ 50A | ||
| Test item | Test range | Accuracy | Description | |
| Temperature | -40-150℃ | ±1℃ | Environmental temperature measurement | |
| DC resistance | 0.01～2000Ω | 0.2% | Range divided into 6 levels, with automatic temperature compensation | |
| Insulation resistance | DC 500V/1～500MΩ | 0.5% | Automatic deduction of background | |
| Inter-turn testing | 400～3000Vp | 0.5% | Wavefront time: 0.2uS, automatic judgment of adjacent turns between 1/200 turns | |
| Power frequency withstand voltage test | Withstand voltage | AC 400～3000V | 0.2% | |
| Leakage current | 1～500mA | 0.2% | ||
| Current measuring | DC voltage | DC 50-800V | 0.5% | |
| DC current | DC 1-100A | 0.5% | ||
1.The appearance of the product shall be subject to the actual product，Technical parameters with model if there are any changes，without notice.In case of misappropriation or copying, legal liability will be investigated.
2. For more information about Wuhan UHV, please enter product center . Service email：info@hvtest.cc
1、It can automatically test the DC resistance, insulation resistance, power frequency withstand voltage, turn to turn withstand voltage, locked rotor test, no-load test and other parameters of three-phase asynchronous motors, as well as environmental temperature and other parameters.
2、Can perform no-load testing on DC motors.
3、It can automatically test the no-load test of DC motors.
4、It can automatically determine whether the test data meets the quality control limits based on parameter settings.
5、Automatically generate reports and reports.
6、Equipped with 1 1000A and 1 100A measurement circuit
7、Equipped with safety interlock protection function, sound and light alarm function, emergency stop function, etc.
After starting the test, first measure the current ambient temperature as the basis for correcting the resistance; According to the resistance range set in the "Parameter Settings", select the corresponding range, measure the resistance of the three lines of the three-phase stator in sequence, and calculate the resistance imbalance. After converting according to the requirements of GB/T 1032-2023, compare the measurement results with the upper and lower limits set in the "Parameter Settings" to automatically determine whether they are qualified or not. If they are unqualified, terminate the testing of other projects on this line. If they are qualified, continue the testing of other projects on this line.
Before measuring this project, it is necessary to measure the background insulation of the equipment in advance to calculate the final actual measurement results. During testing, the testing equipment applies a DC voltage of 500V between the tested winding and the casing (ground wire). The measured insulation resistance is subtracted from the background and displayed as the test result output. It automatically determines whether it is qualified or not based on the preset lower limit value in the "parameter settings".
Before testing, standard waveform sampling should be done in advance to determine the sampling rate and amplification factor. During testing, the adjusted inter turn high voltage will be applied to both ends of the tested stator winding. Then, the testing program will overlay the collected oscillation waveforms generated by the three windings with the pre sampled standard waveform on the screen (to compare the overlap with the standard waveform). The testing program will automatically compare and calculate them, and judge the good or bad inter turn insulation strength based on the upper limit of the area difference set in the "parameter settings" and other standards.
After the tested motor runs continuously under idle running until the loss is stable, adjust it to the rated voltage. By pressing the "Start" button for the second time, measure the voltage, current, power and frequency of the motor under no-load condition, and correct the measured data according to the voltage value set in "Parameter Setting", calculate the no-load current, power and current unevenness, judge whether it is qualified or not, and display all the data on the screen.
Before measuring the project, it is also necessary to measure the background leakage current of the testing device; Apply the same power frequency high voltage between the tested motor winding and the shell to measure the leakage current generated, deduct the background and display it as the final result, and automatically judge whether it is qualified or not based on the upper and lower limits set in the "parameter settings".
After the tested DC motor runs continuously in idle state until the loss stabilizes, the armature voltage, current, excitation voltage, and current of the DC motor under no-load are measured, and the qualification is judged. All data is displayed on the screen.
Enterprise products in strict accordance with international and national standards and rules of industry production, through the national, provincial and municipal electric power research institute and electric power authorities detection, measuring center, fully passed the ISO9001 international quality management system certification, the licence for manufacturing measuring instruments of the People's Republic of China, GB/T19001-2016 quality management system requirements, GB/T24001-2016 environmental management system requirements, GB/T45001-2020 occupational health and safety management system requirements.
email： info@hvtest.cc
Skype： Tina Qiao
+8615172408058
