Short-Time Thermal Current Automation Tester for Current Transformers
Product description
Current transformer short-time thermal current automatic test device in accordance with the national standard <<GB1206 Current Transformer>> and the national network company standard <<Q/GDW1572 Current Transformer Technical Specification>> and other requirements to fully automatic completion of the current transformer short-time thermal current detection test. The device first measures the impedance value of the connected current transformer sample circuit, and then automatically controls the output current of the device to the target test current value based on this impedance value and the set test current value. Under the condition of 1s test duration, when the output current and load calculated by the device exceed the maximum output of the device, it will reduce the test current and extend the test duration according to the I2t equivalent test method given in the standard, and the longest test time is controlled within 5s to ensure that the test process is numerically equivalent to the 1s thermal current impact test by adding I2t to the primary circuit of the sample.
Product application
1. Performance testing of current transformers: The equipment can perform short-time thermal current testing on current transformers to verify whether their performance indicators such as rated current, short-time thermal current capacity, and overload capacity meet the requirements.
2. Fault diagnosis of current transformers: By performing short-time thermal current testing on current transformers, the equipment can detect whether there are faults such as short circuits and open circuits inside the current transformers, so as to conduct maintenance or replacement in a timely manner.
3. Monitoring of the operating status of current transformers: The equipment can monitor the operating status and performance parameters of current transformers online in real time, so as to timely detect and eliminate potential hidden faults and improve the reliability and stability of power systems.
4. Optimization of power system operation: By testing and monitoring current transformers, the equipment can provide reference for the optimization of power system operation, such as adjusting the rated current and short-time thermal current capacity of current transformers to improve the load capacity and safety and stability of power systems.
Circuit schematic
Precautions for use
(1) CT short-time thermal current test device must use more than 10mm2 wire diameter cable reliable grounding before energizing
(2) CT short-time thermal current test device in the high current shock test, the operator and the device regulator control box and booster box must maintain a safe distance of more than 3 meters
(3) CT short-time thermal current test device after the completion of the test, the test circuit temperature may be very high, should be avoided immediately after the completion of the test to lift the test product and cause burns
Product parameters
| Maximum output current |
0~10000A (larger output current can be customized) |
| Output current error |
less than 10%% of the set value |
| Output capacity |
250KVA |
| Sample primary circuit current measurement |
0~10000A, measurement error 0.1%FS |
| Sample primary circuit voltage measurement |
0 ~ 30V, measurement error 0.1%FS |
| Test process voltage and current waveform sampling rate |
25KHz |
| Time measurement error |
0.04ms |
| Power supply |
AC380V,45Hz~65Hz |
| Working temperature |
0~50 degrees, humidity less than 90% |
Model Comparison
| Model |
Output current |
Open Voltage |
Output power |
Test time (S) |
| (A) |
(V) |
(KVA) |
(IECstandard) |
| GDCTDW-10 |
10000 |
12 |
120 |
1 |
| GDCTDW-20 |
20000 |
10 |
200 |
1 |
| GDCTDW-30 |
30000 |
10 |
300 |
1 |
| GDCTDW-40 |
40000 |
10 |
400 |
1 |
| GDCTDW-50 |
50000 |
10 |
500 |
1 |
Audited Supplier 
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