Transformer Heat Run Tester JYR (40E)、(50E)
The tester adopts the new third-generation power supply technology, which has the characteristics of high power efficiency, wide measurement range and large output current. The whole instrument is controlled by a single-chip microcomputer, which automatically completes the functions of self-check, data processing, display, etc., has a temperature rise timer, automatically saves and prints the temperature rise data, and can generate a temperature rise curve with the temperature rise data with the host computer. It has the functions of automatic discharge and discharge indication.

Due to the large temperature difference between the high and low voltage windings of the transformer, the traditional constant current source high and low voltage series test cannot be used. However, if two test instruments are used for simultaneous testing, the instruments are easily damaged due to the mutual inductance between the high and low voltage windings of the transformer. Therefore, JYR-40E adopts the Dual Constant Current Power, CUP program controls the charging and discharging timing, and has perfect protection measures. It is very suitable for transformer temperature rise tests with large temperature difference between high and low voltage windings.

Function Introduction

● JYR 40E/50E Transformer heat run winding resistance tester is suitable for DC resistance test and heat run test of 240MVA and below transformers.

● JYR 40E/50E has a large output current (up to 50/40A) and a high charging voltage (50V)

● Aiming at the problem of long low-voltage stability time of iron-core five-column large-capacity transformer, this instrument has the function of automatic magnetic assistance of YNd, YNyn and Dyn according to the magnetic circuit, which can meet the time requirements of the transformer heat run test.

● This machine also has dual-channel measurement and phase selection measurement, customized temperature rise timing, real-time sampling, and real-time printout, making the temperature rise test a simple and convenient thing.
● In the conventional mode, it has the function of temperature conversion, magnetic assistance and phase selection measurement, and automatically calculates the unbalance rate after completing the three-phase test.
● It has perfect protection circuit, audio discharge alarm, clear indication, strong reliability and reduced misoperation.
● Large color screen, touch operation, simple and convenient, clear and easy to read the display data.
● The instrument has the functions of perpetual calendar, 100 groups of conventional data storage, 3 times temperature rise test data storage, automatic conversion of conventional mode temperature, etc., and no data loss is lost when the machine is shut down. In addition, there is a "U disk" interface, which is convenient for exporting temperature rise data for reference and generating temperature rise curves.
● This instrument is equipped with RS485 communication interface, with the host computer control software, to achieve long-distance control and measurement.
● This machine has the function of AC380V power protection alarm for input misconnection to reduce the damage to the instrument caused by misoperation.
● This machine has the characteristics of wide applicable temperature, high precision, shockproof, anti-interference, high stability, and easy to carry.

TECHNICAL SPECIFICATION:

Type	50E	40E
Output current	50A, 20A, 10A, 3A, 1A, 0.3A, 0.1A,0.02A	40A, 20A, 10A, 3A, 1A, 0.3A, 0.1A,0.02A
Range	0～40 kΩ	0～40 kΩ
Accuracy	0.2%±0.2 µΩ	0.2%±0.2 µΩ
Min. resolution	0.01 µΩ	0.01 µΩ
Output voltage	DC50V
Timing of heat run	10s, 30s, 60s for option
Operation power	AC220V±10%, 50 Hz±1Hz
Operation temperature	-20℃～40℃
Relative humidity	≤80%RH, no dew
Volume	L445mm * W370mm * H210mm
Net weight	15.7 kg

The main operation interface for heat run testing:

Heat Run Curve: