On site calibrator for current transformers

BYCT-HOn site calibrator for current transformers

1、 Characteristics

1This productIt has the function of using recursive method to measure the error of current transformers, which facilitates on-site calibration of measuring devices.

2. On site calibration of current transformers does not require standard current transformers, current transformers, load boxes, voltage regulation control boxes, or high current wires. It uses extremely simple testing wiring and operation to achieve the calibration of current transformers, greatly reducing work intensity and improving work efficiency, making it convenient to carry out on-site transformer calibration work.

3This productInternally equipped with a standard voltage transformer equivalent to the measured current transformer with the same transformation ratio, its accuracy can reach0.05 level, accurately measure the transformation ratio and no-load error of the tested current transformer. Then, by combining the test results of impedance and admittance, the error of the transformer can be calculated.

4. Using a power supply close to the power frequency for testing, to prevent on-site power frequency electromagnetic radiation and series interference.

5. Wide measurement range, capable of measuring up to5A/5A~31500A/5A 或5 A/1A~6300A/1A.

6. It has the functions of current transformer ratio and secondary winding internal resistance testing.

7. Adopting800 × 600 high-resolution large screen TFT color LCD touch displayFeaturing a user-friendly interface and operation design, the touch screen is used to assist in making operations more convenient and efficient.

8. By using precise software algorithms, the accuracy of measurement data is further improved.

9. It has intelligent judgment of external wiring status, indicating wiring errors, transformation ratios, polarity errors, etc.

10. Automatically organize the test data and determine if it is out of tolerance. Out of tolerance data is displayed in orange and in the lower right corner of the window, providing a clear and intuitive understanding of the data characteristics of the transformer.

11At the same time, it can test the transformation ratio and polarity function of voltage transformers.

12. Directly issue on-site inspection conclusions, qualified or out of tolerance.

13. The large-scale storage can store up to 1000 pieces of on-site test data.

14. Use RS232 or USB interface to connect the computer and print data certificates.

15. Adopting engineering plastic mold chassis for shock and pressure resistance, ensuring the safety of on-site operators and equipment.

2、 Main performance and technical indicators

1Error measurement part of current transformer

① Accuracy of the whole machine: the error limit of the tested current transformer1/3

② Test scope:5A/5A~31500A/5Aor5A/1A~6300A/1A

BYCT-HOn site calibrator for current transformers

Note: The secondary current isA current transformer of 1A can achieve a conversion ratio of 31500A/1A through the equal ampere turns measurement method.

The testing method for the transformation ratio of other current transformers that do not appear in the table is as follows:

Use the equal ampere turn method to test current transformers, for example: need to testFor a 1000A/5A transformer, please insert two turns of the testing wire that comes with the instrument into the tested current transformer, and then input the primary current in the current transformer testing interface of the instrument as 500A. This testing method does not affect the validity of the transformer test data.

Similarly, for other ratios, use the following processing method:

③ Operating range of the tested current transformer: 1% to 200%

④ Secondary load: 2.5VA~300VA TheCOSφ＝0.1～1.0

⑤ Accuracy range of the tested current transformer: 1.0, 0.5, 0.5S, 0.2, and 0.2S

⑥Resistance and admittance measurement errors≤5.0％

Measuring range: R：0.00Ω to 20.0Ω

Y: 0.000mS～100.0mS

2. Voltage Transformer Calibration Instrument Part

Variable ratio testing range:1KV-500kv

3. Instrument power consumption: 20VA

4. Instrument accuracy level: 0.05S level

5. Maximum external dimensions（cm）：L460´W375´H183

6. Weight（kg）:10.0