Transformer Temperature Rise Test

1 Overview

HYCW Current Transformer Temperature Rise Automation Test Device in accordance with the National Electrical StandardsAnd the State Grid Corporation StandardsThe device awaits the completion of the automatic temperature rise test for current transformers. Based on the rated current of the connected current transformer, it automatically controls the electronic current booster to reach the target test current as per standard requirements. Throughout this process, it continuously monitors the transformer body temperature, winding junction temperature, and ambient temperature. It then automatically determines if the current transformer has reached thermal stability based on the measured temperature values and the standard temperature rise stability conditions. Once the temperature rise of the current transformer stabilizes, the device measures the DC resistance value of the transformer's winding. It then calculates the high temperature of the winding resistance after the current transformer has reached thermal stability and the maximum temperature rise during the testing process, based on the resistance value at that moment and the DC resistance value of the winding before the current boost.

2. Characteristics of the Test Device

Compared to the current manual measurement of temperature rise tests for current transformers, the device boasts the following distinct advantages:

The HYCW Current Transformer Temperature Rise Automation Test Device can simultaneously measure the temperature rise of 5 current transformers, significantly improving test efficiency.

During the testing process, the system automatically adjusts the output current size, ensuring that the testing current error remains less than 0.5% from the target current. This prevents significant fluctuations in the testing current due to factors such as changes in the main circuit resistance and voltage fluctuations in the power grid, thereby making the testing process more persuasive.

Real-time monitoring and recording of the temperature values of the current transformer's body, winding connections, and the environment, with automatic judgment of the thermal stability conditions of the current transformer to avoid errors in human judgment.

When the current transformer reaches thermal stability, quickly measure the resistance of the transformer winding to avoid measurement errors in temperature rise caused by time delays from manual wiring tests.

Automatically switches the secondary circuit load of current transformers to avoid potential errors from manual operation.

3 Features

Automatically adjusts the output current size using electronic voltage regulation and controls the output current value during testing to maintain an error within 0.5% of the target test current throughout the process.

2. Automatic switching current transformer secondary circuit connected load value

Measure the secondary winding resistance of current transformers and calculate the large temperature rise of the transformer winding based on the winding resistance and the initial temperature before the test.

4 Monitors the current transformer's body and winding junction temperatures during the test process, automatically determines whether the current transformer has reached the temperature stabilization condition based on the selected standard.

Recorded the temperature data change curves of all monitoring points throughout the entire experiment process, as well as all measured resistance values during the test.

6 Automatically Generate Standardized Test Reports

4 Technical Specifications

1 High output current of 0~2500A (larger output currents available upon customization), with output current error less than 0.5% of the set value, and a resolution for output current adjustment of 1A.

2 kW Power Supply Output 10KVA

Number of current transformers that can be measured simultaneously: 5

Temperature measurement range: 0~200 degrees, with an accuracy less than 0.5 degrees and a resolution of 0.1 degrees.

5 Direct Current Resistance Measurement Range: 0~200 Ohms, Measurement Error: 0.2% of Reading Value + 2D

6 Time Measurement and Recording Error: 0.1ms

7+ Continuous Operation for Over 24 Hours

8 Current Control Error Set Point: 0.5%

A 0.5% reading error in current measurement ±5D

10 Current Transformer Temperature Monitoring Points, 12 in Total

Method of temperature measurement for the transformer body and terminal joints of current transformers, palladium resistance

12 AC Power Supply: 220V, 45Hz~65Hz

Work environment temperature: 0~50 degrees Celsius, humidity less than 90%.