The JYT-A is a fully automatic three-phase testing device designed specifically for the turn ratio of power, distribution,and instrument transformers. The JYT-A accurately measures the voltage on the no-load transformer windingsbyapplying voltage to the high-voltage winding and then determines the transformer turn ratio by displayingtheratioofthese voltages. The JYT-A is based on the most advanced technology available today. This testing device can be usedfor testingsingle-phase and three-phase transformers, CT, PT, CVT, Z-type connections, and transformers withneutral points,including those with and without taps, meeting the requirements of the IEC 60076-1 standard.
For three-phase measurements, the testing device connects to all three phases of the transformer tobetested.Ifmeasuring different types of transformers (such as single-phase, delta to star, star to delta, delta to delta, star tostar,delta to zigzag, etc.), there is no need to switch the test connection cables; the test can be performed directly. The JYT-A can automatically compare the test results with the nameplate voltage of the transformer input bytheuser,calculate the turn ratio deviation, and print out the error percentage for each test. Even if the user does not input anydata, the JYT-A can still accurately measure the transformation ratio. The JYT-A features high and low voltage reverse connection protection, transformer short circuit, inter-turnshort circuitprotection, and a very high ability to eliminate electrostatic and electromagnetic interference in high-voltageelectricfields, effectively ensuring the accuracy of the test results
FUNCTION INTRODUCTION:
1.The interface adopts intelligent touch mode, which is simple and convenient to operate.
2.High stability sine wave power supply, the test voltage is automatically adjusted according to the load.
3.The test data is accurate when the generator is powered,if the quality of the power supply in the field is poor.
4.The test speed is fast.The three-phase turns ratio test can be completed in one wiring, which only takes 10 seconds.
5.CT, PT, CVT and Z-connection transformers can be tested.
6.It is suitable for ratio measurement from distribution transformers to 1000KV transformers, current transformers (CT), voltage transformers (PT) and Z-type connection transformers.
7.A variety of short circuit measurement methods are set inside, which is more convenient for fault judgment.
8.No power-off clock and date display, 200 sets of data can be saved in the machine, and the power-down data will not be lost.
9.Large color LCD display, clear and easy to read data. RS485 communication interface and U disk storage interface.
10.The instrument has the function of high and low voltage reverse connection protection, and has the function of transformer short circuit and inter-turn short circuit protection.
11.Bluetooth communication function(optional).
Power supply
JYT-A TTR provides two power supply modes, AC model uses AC100~240V 50/60HZ, DC model has built-in lithium battery.
JYT-A Testing Interface:
JYT-A Connection with Transformer:
JYT-A Specification:
Display digits
5 bits
Output voltage
160V
(AC power supply)
20V
(AC power supply).
Max 160V
(DC power supply)
Test Range
0.9-10000
0.9-1000
0.9-10000
accuracy
<2000
±0.1%
≤200
±0.1%
<2000
±0.1%
2000-10000
±0.3%
200-1000
±0.3%
1000-5000
±0.3%
Minimum resolution
0.0001
power supply
AC100-240V,50/60Hz
lithium battery
Test data storage
200 sets
Operating temperature
－20℃～40℃
relative humidity
≤ 80%, non-condensing
volume
285 mm * 218 mm * 158 mm
net weight
5kg
turn ratio tester, transformer test instrument, winding resistance tester, transform
