The transformer winding temperature rise test simulates actual operating conditions to measure the temperature increase of the transformer windings under rated load. The core objective is to verify that the winding temperature rise is controlled within the design and standard limits (such as IEC, GB standards), ensuring the long-term safety and reliability of the transformer. Excessive temperature rise accelerates the aging of insulation materials, leading to a decline in insulation performance and potentially causing severe faults such as short circuits or breakdowns, while also affecting transformer efficiency and service life.

This test assesses the thermal stability of the windings, providing a basis for design optimization and ensuring that the heat dissipation structure is reasonable to prevent local overheating. It is also a necessary part of factory testing, directly reflecting the quality of the manufacturing process and preventing abnormal temperature rises due to material defects or assembly issues. Furthermore, temperature rise data can serve as an important parameter for evaluating the transformer's load capacity, guiding users to reasonably plan the operating load and improving grid stability. As a key item in type testing, the winding temperature rise test serves as a "temperature red line" for ensuring safe equipment operation and is also an important indicator for measuring transformer energy efficiency and environmental performance.

Suitable for heat run testing of all transformers with voltages below 35kV.

Automatically prints heat run data.

Equipped with dual power supply, enabling simultaneous testing of both high-voltage and low-voltage sides, with independent operation options.

Includes anti-breakage protection function for inductive test items.

Data can be exported via USB disk to generate a temperature rise curve on a computer.

Includes an RS485 communication interface for computer interconnection.

Features protection against misconnection to AC380V.

Equipped with heat run software that automatically handles testing data.

Audio discharge alarm with clear discharge indication.

JYR-20W Main Operation Interface for Heat Run Testing

JYR-20W Heat Run Curve:

TECHNOLOGY SPECIFICATION:

TYPE	JYR 20W
Output current	HV:  5A, 1A, 0.1A, 0.01A	LV: 20A, 10A, 5A, 2A
Testing range	0~2 kΩ	0~2Ω
Accuracy	0.2%±1μΩ	0.2%±0.2μΩ
Output voltage	DC 20V	DC4V
Minimum resolution	0.1μΩ	0.1μΩ
Power supply in operation	AC220V±10%, 50Hz±1Hz
Temperature in operation	-20~40℃
Relative humidity	≤80%RH,  No forming dew
Volume	Length 410 mm  Width 440 mm  Height 210 mm
Net weight	15.7 kg
Temperature rising timing rate	10”,30”,60” are optional