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 by the instrument 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 computerized 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 the volt-ampere characteristics of protection CTs, automatically plot 5% and 10% error curves, ratio, and polarity, and can also output large currents for testing the secondary circuit of CTs.
3. Large output capacity: The maximum output voltage for volt-ampere characteristic tests is up to 1000V, the maximum current for ratio tests is up to 600A, and the output capacity of the instrument is 5KVA.
4. Complete optional accessories: Accessories include an external voltage booster, external current booster, and external voltage regulator. The external voltage booster can increase the voltage up to 2000V/3A, the external current booster can increase the current up to 1000A, and the external voltage regulator can output up to 1500V/20A. When using the external voltage booster, volt-ampere characteristic tests can be performed on current transformers of 500KV class with 1A current.
5. Good human-machine interface: Large 320*240 dot matrix Chinese character graphic 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 a built-in Flash memory that can store a large amount of test data. The data is not lost after power failure. After completing field tests, 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, aesthetically pleasing, and simple to operate. It can save and print test results and export test data to EXCEL format for editing.
Complete
The volt-ampere characteristic tester can test a complete range of items
Current transformer test items:
1) Measurement of current transformer ratio
2) Polarity discrimination of current transformers
3) Measurement of secondary DC resistance of current transformers
4) Measurement of volt-ampere characteristics of current transformers - protection windings
5) 5% or 10% error of current transformers - protection windings
6) Measurement of actual load of current transformers
Voltage transformer test items:
1) Measurement of voltage transformer voltage ratio
2) Polarity discrimination of voltage transformers
3) No-load error of voltage transformers
4) Measurement of actual load of voltage transformers
5) Volt-ampere characteristic test
Features
l Automatic testing: Fast, simple, and convenient. The power supply automatically adapts to 380AC and 220AC, automatically calculates the knee point voltage and current and the composite error, and 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 the primary voltage and the secondary induced voltage, obtaining the ratio and polarity of the voltage transformer at that voltage, and can also perform volt-ampere characteristic experiments on voltage transformers.
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 graphic 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 diagrams and test data; it can also store test data at any time.
Strong Expandability
a) Can be connected to 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 the external voltage regulator are very simple.
b) Optional external voltage booster: The optional external voltage booster can increase the voltage up to 2000V, 3A, and can be used for volt-ampere characteristic tests on 5000/1 class current transformers.
l Has storage and printing functions, and all setting parameters can be saved after power failure.
