High Current Injection Temperature Rise
The temperature rise automatic test device is applied to automatic completion of current transformers, circuit breakers, load switches, disconnectors, power cable temperature rise tests. The device automatically controls the electronic current injector to rise to the target test current required by the standard according to the rated current of the connected current transformer.
Description
The temperature rise automatic test device is applied to automatic completion of current transformers, circuit breakers, load switches, disconnectors, power cable temperature rise tests. The device automatically controls the electronic current injector to rise to the target test current required by the standard according to the rated current of the connected current transformer. During this process, the instrument continuously monitors the temperature of the sampler and the ambient temperature, and automatically determines whether the current transformer is thermally stable according to the measured temperature value and the temperature rise and stability conditions required by the standard. When the sample is current transformer, after the temperature rise reaches stability, the device measures the winding DC resistance value of the current transformer coil, and calculates the maximum temperature of the coil winding after the current transformer reaches thermal stability and the maximum temperature rise value during the test according to the winding resistance value at this time and DC resistance value of coil winding before rising current.
Features
1. The automated CT temperature rise test system can fully automatically complete temperature rise tests for five single-winding CTs or a single five-winding CT, significantly improving test efficiency.
2. During testing, the output current is automatically adjusted to ensure the test current deviates from the target current by less than 0.5%. This prevents significant fluctuations in test current caused by variations in main circuit resistance or grid voltage fluctuations, making the test process more reliable.
3. Real-time monitoring and recording of temperature values for the CT body, winding joints, and environment, with automatic determination of thermal stability conditions to eliminate human judgment errors.
4. Automatic generation of standardized WORD test reports, substantially improving operational efficiency.
Technical Specification
1. Maximum output current: 0~10000A (actual maximum output current subject to nameplate parameters; higher output currents available upon request). Output current error <1% of set value. Output current adjustment resolution: 1A.
2. Current transformer output capacity: 100KVA.
3. Number of current transformer windings measurable simultaneously: 5.
4.Temperature measurement range: 0~200°C. Measurement error: 1% of reading + 0.5°C. Resolution: 0.1°C (requires temperature inspection instrument configuration).
6. Primary current measurement error: 0.5% of reading + 0.05% FS. Measurement range: 0-5000A.
7. Secondary current measurement error: 1% + 0.1% FS. Measurement range: 0-10A.
8. Time measurement and recording error: 0.1ms
9. Current, temperature, and resistance parameter recording duration: >24 hours
10. Test record storage capacity: >1000 sets
11. Power supply: AC380V, 45Hz–65Hz
12. Operating environment: Temperature 0–50°C, humidity <90%
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