Automated Temperature Rise Testing System for Current Transformers Temperature Rise Test

• After-sales Service: Lifetime Technical Support
• Warranty: 1 Year for CT Temperature Rise Tester
• Type: Current Transformers Temperature Rise Tester
• Accuracy Grade: 0.5
• Load Way: Electronic Load
• Loading Method: Dynamic Load
• Model NO.: GDCW
• Display: Digital
• Control: Manual Control
• Power Source: AC220V
• Device Name: Current Transformers Temperature Rise Tester
• Current Booster Output Capacity: 50kVA
• DC Resistance Measurement Range: 0~200 Ohm
• Time Measurement and Recording Error: 0.1ms
• Current Control Error: 0.5% of The Set Value
• Primary Current Measurement Error: 0.5% Reading Value +5D
• Maximum Output Current: 0~5000A (Greater Output Current Is Customizable)
• Temperature Range: 0~200 Degree
• Transport Package: Wooden Case
• Specification: ask the salesman
• Trademark: GOLD
• Origin: Chongqing, China
• Production Capacity: 200sets/Month

Product Description

Automated Temperature Rise Testing System for Current Transformers Temperature Rise Test

 

Temperature Rise Test of Transformer

 

The temperature rise test is a crucial component of any comprehensive type test conducted on an oil-filled transformer. This test assesses whether the temperature increase within the transformer winding and oil remains within the specified limits set by the manufacturer.

 

Why Does A Transformer Get Hotter Than Usual?

Different losses that cause a transformer to get hot, in normal conditions, are losses due to resistance of the windings, Hysteresis, and eddy current losses.But, in some cases, the transformer gets hotter than usual.There are other main reasons why the transformer gets hotter.
 

1. When the load exceeds the transformer rating "overloading the transformer".
2. Higher ambient temperature.
3. High moisture in the transformer oil increases the temperature rise because the transformer oil's ability to dissipate heat decreases.
4. Blocked ventilation openings of transformers, sometimes by bird nests.
5. When connecting loads with poor Power Factor.
6. The misaligned or broken cooling fan of the transformer.
7. Any issues with the transformer cooling system i.e. air fans or oil pumps?
8. Any internal fault can increase the temperature of the transformer.

Functionalities of the Transformer Temperature Rise Tester

Adopts electronic voltage regulation to automatically adjust the output current size, and in the test process automatically control the output current value so that it is in the whole test process and the target test current error control within 0.5%.

Automatically switch the load value connected to the secondary circuit of the current transformer.

Measure the resistance of the secondary coil of the current transformer and calculate the maximum temperature rise of the current transformer coil based on the coil resistance and the initial temperature before the test.

Automatically monitors the temperature of the current transformer body and winding joints during the test and automatically determines whether the current transformer has reached temperature stability according to the selected criteria.

Record the temperature data change curve of all monitoring points during the whole test process, and record all the resistance values measured during the test process.

Automatically generate a standardised test report.

 

Specimen installation