Fully Automatic Volt-Ampere Characteristic Tester Test Operation Method and Procedure
This instrument is a fully automatic current transformer characteristic testing device. The tests that can be completed include: CT volt-ampere characteristic test, CT polarity test, CT ratio and polarity test. The instrument can automatically calculate the error curve at any point of the CT, the CT ratio error, and other result parameters. The instrument has the following characteristics:
1. Safe and convenient operation: Fully microcomputerized device, built-in imported high-performance CPU, high reliability. After setting the test values according to the interface prompts, there is no need for manual contact with the tested equipment, eliminating tedious tasks such as manual voltage adjustment, manual recording, sorting, and curve drawing. It is fast, simple, and convenient. No computer knowledge is required, and it is very easy to master, keeping test personnel away from high-voltage circuits and ensuring their personal safety.
2. Comprehensive functions: Can test protection CT volt-ampere characteristics, automatically plot 5% and 10% error curves, ratio, polarity, and can also output large current for testing the secondary circuit of CT.
3. Large output capacity: The maximum output voltage for volt-ampere characteristic test is up to 1000V, the maximum current for ratio test is up to 600A, and the output capacity of the instrument is 5KVA.
4. Complete optional accessories: Accessories include external booster, external current booster, and external voltage regulator. The external booster can increase the voltage up to 2000V/3A, the external current booster can increase to 1000A, and the external voltage regulator can output up to 1500V/20A. When using the external booster, the volt-ampere characteristic test of 500KV class 1A current transformers can be performed.
5. Good human-machine interface: Large screen 320*240 dot matrix Chinese character graphical interface. After the test is completed, the volt-ampere characteristic curve can be directly displayed. The graphics are clear, beautiful, and easy to analyze. It comes with a built-in micro printer, which can print curves and test results at any time.
6. Convenient human-machine interaction: The instrument uses a high-performance photoelectric rotary mouse as the input device, which is simple and convenient to operate and has a long service life.
7. Large data storage capacity: The instrument has built-in Flash memory, which can store a large amount of test data. The data is not lost after power failure. After on-site tests are completed, test results can be viewed and printed indoors.
8. Multi-channel human-machine interaction: In addition to using the rotary mouse for input control, the instrument can also be connected to a computer through its built-in RS232 communication interface to achieve communication between the PC and the instrument. Test personnel can use the computer to control the instrument for testing or upload test data from the instrument. The PC application software provided with the instrument is powerful, beautiful, and easy to operate. It can save and print test results and export test data to EXCEL format for editing.
Complete
Volt-Ampere Characteristic Tester Can Test Complete Items
Current transformer test items:
1) Measurement of current transformer ratio
2) Polarity discrimination of current transformer
3) Measurement of secondary DC resistance of current transformer
4) Measurement of volt-ampere characteristics of current transformer - protection winding
5) 5% or 10% error of current transformer - protection winding
6) Measurement of actual load of current transformer
Voltage transformer test items:
1) Measurement of voltage transformer voltage ratio
2) Polarity discrimination of voltage transformer
3) No-load error of voltage transformer
4) Measurement of actual load of voltage transformer
5) Volt-ampere characteristic test
Features
l Automatic testing: Fast, simple, and convenient. Power supply 380AC and 220AC automatic, automatically calculates knee point voltage and current and composite error, intuitively judges whether the transformer is qualified. It can automatically test and plot the volt-ampere characteristic curve, eliminating tedious tasks such as manual voltage adjustment, manual recording, sorting, and curve drawing; no special training is required, and it is easy to master.
l Comprehensive functions: Can test protection CT volt-ampere characteristics, 5% and 10% error curves, DC resistance, ratio, and polarity.
1) The instrument can perform qualitative measurement on voltage transformers: during measurement, the instrument applies a certain power frequency voltage to the primary side of the voltage transformer, and can measure its primary voltage and secondary induced voltage, obtaining the ratio and polarity of the voltage transformer at that voltage, and can also perform volt-ampere characteristic experiments on the voltage transformer.
2) The instrument can measure the on-site secondary load of current and voltage transformers, and can measure the ratio error and phase error of the current transformer under that load.
l Built-in large screen graphic LCD, fully Chinese graphical interface: Clear and beautiful, intuitive and convenient. During testing, the volt-ampere curve is directly displayed. It comes with a built-in thermal printer, which can quickly print curve graphs and test data; it can also store test data at any time.
Strong Expandability
a) Can connect an external voltage regulator for testing: If the output voltage or current of the single unit cannot meet the requirements, a user-provided voltage regulator can be connected to the device for testing. The wiring and test method for external voltage regulator testing are very simple.
b) Optional external booster: The optional external booster can increase up to 2000V, 3A. It can be used for volt-ampere characteristic testing of 5000/1 class current transformers.
l Has storage and printing functions, and all setting parameters can be saved after power failure.
