Transformer Comprehensive Tester
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The Transformer Comprehensive Tester is developed based on the successful development of the transformer calibrator, using indirect method to analyze the mathematical model of transformers in detail, and is a field testing instrument for transformers; however, the test results depend on the accuracy of the equivalent model and the accuracy of each parameter measurement. This instrument can measure CT volt-ampere characteristics and curves (1A, 5A), 5%, 10% error curves, DC resistance, transformation ratio polarity, CT dynamic stability and short-time thermal current test according to national standards; it can directly measure the transformation ratio of voltage transformers; it can measure bushing CTs installed in transformers. It can qualitatively measure the ratio error and polarity of voltage transformers; it can measure the actual secondary load of current and voltage transformers on site, etc. The instrument uses high-precision, automatically linearly regulated DC and AC power supplies; high-speed, high-reliability digital processing modules; it requires high-power output power supply to meet test requirements, and also needs to be convenient for test personnel to use and carry; high measurement accuracy, high stability front-end measurement circuit ensures the accuracy and high stability of the instrument measurement. It can be used in harsh environments such as high temperature, high humidity, at sea, desert, extreme cold, high altitude, etc.
In addition, the instrument adopts the 320x240 large LCD (optional LCD screen that can work at low temperature in northern regions) full Chinese interface platform technology newly developed by our company, with a user-friendly human-machine interface, prompting wiring and operation, and has the function of saving any measurement parameters and printing measurement results. It is equipped with a dedicated integrated power supply system with AC220V power supply and 10~20KVA capacity. (The transformer comprehensive tester with built-in high-power power supply can be tested continuously)
|
Input Voltage |
Output Range |
Measurement Range |
Measurement Accuracy |
Main Unit |
AC220V |
0～550V, 0～20A |
0～550V, 0～20A |
< =0.5% |
Main Unit |
AC380V |
0～950V, 0～20A |
0～950V, 0～20A |
< =0.5% |
External Step-up Transformer |
AC220V |
0～2000V，0～3A |
0～2000V，0～3A |
< =0.5% |
External Voltage Regulator |
A220V |
0-250V，0-80A |
0～1000V，0～30A |
< =0.5% |
Device Operating
Power Supply |
AC 220V±10%，50/60Hz |
Operating Environment
Temperature |
-10℃ - +50℃ |
External Measurement
Power Supply (Can be
used continuously for long time) |
AC 220V or AC 380V |
Volume, Weight |
240×320×350mm3，28kg
(No external power supply or external 380V power supply needed)
420×300×270mm3， 34.5Kg |
3.2Current Transformer Measurement Range:
Transformation ratio: 5A/5A～25000A/5A（5A/1A～5000A/1A）。
Turns ratio error: 1%。
3.3Voltage Transformer Measurement Range:
2.2kV～132kV, Measurement error: ratio error 0.5 class.
3.4Actual Secondary Load Test
PT load 10VA~500VA, Measurement error: class 2
CT load 0.1Ω~25Ω, Measurement error: class 2
3.5-inchWorking Conditions:
Power supply voltage: AC 220V ±10%
Power frequency: 50Hz ±2%
Ambient temperature: (-10~40)℃
Ambient humidity: <85% at 25℃
Altitude: below 5000 meters
3.6 Precautions:
1. The secondary winding of the current transformer should not have a grounding point.
2. When measuring bushing CTs installed in transformers, restore the original wiring after the test.
3. Wiring and unwiring can only be done when the voltage regulator switch and output switch are in the off position.
4. The device should be reliably grounded before testing.
5. After the test, return to zero promptly; do not stay under high voltage and high current for a long time.
6. When using external step-up, step-up current equipment and external 380V power supply, equip appropriate protection system to ensure the safety of personnel and equipment.
7. If the LCD screen does not display or the printer does not work properly, do not tap the panel, vibrate the body, or disassemble and repair it yourself; contact the manufacturer for maintenance.
8. The single machine is heavy; pay attention to personal safety when moving during testing.
9.
Test personnel should maintain an appropriate safe distance from the test object.
Note: The above information and technical parameters are compiled and released by Yangzhou Darui Electric Co., Ltd.
