The on-site thermal calibrator of the current transformer is an important part of the power system measurement equipment. The accuracy of the thermal calibrator directly affects the accuracy of the electricity bill measurement for the user of the measurement equipment. Therefore, the regular inspection of the current transformer on-site thermal calibrator is what the power sector does. At present, most of the traditional transformer inspection methods in China use relatively poor methods. That is, the secondary load (usually in lieu of the load load) of the transformer inspected when the transformer is inspected is compared to a standard transformer of the same scale. The booster (voltage) supplies the quantum with current (voltage), and the quantum's secondary (differential voltage) signal is input to the checker. This inspection method requires a high current (voltage) power supply unit, a standard transformer and load bank of the same scale. When the primary current is greater than 1000A, the power supply device reaches tens of kilovolt amperes, which is bulky, difficult to wire, and inconvenient to verify the transformer on site.

Thermal calibrator In response to this situation, the industry has produced a portable and practical current transformer field testing equipment 3354 current transformer field calibrator. This instrument is a transformer tester developed by analyzing the mathematical model of the transformer in detail, and does not require regulators, high-current lifters, standard transformers and load boxes to verify transformers. As long as you carry this instrument, you can measure the ratio difference and angle difference of the current transformer according to the national standard. Random ratio differences and angular differences between 1% and 120% of current can also be measured. The ratio of current transformers and voltage transformers can be directly measured. The ratio difference and the angle difference of the voltage transformer can be measured qualitatively. The actual secondary load of the current and voltage transformers can be measured on site, making verification particularly convenient. The device adopts DC and AC power sources with high precision and automatic linear adjustment. High-speed, high-reliability digital processing module; high-precision and high-stability measurement circuit ensures the accuracy and stability of instrument measurement. In addition, the instrument also has a user-friendly man-machine interface, wiring and operation tips, the function of saving all measurement parameters and printing the measurement results.

Current Transformer Field Calibrator Operation Precautions

1. During the measurement, please pay attention to safety and do not touch the metal part of the test lead.

2. The measurement wiring should be operated in strict accordance with the instruction manual.

3. Before the test, please carefully check whether the set parameters are correct.

4. Try to use a power socket with a ground wire.

5. Do not remove the test fixture during the test, and do not open the circuit.

6. The test wiring work should be carried out when the power is turned off and the CT is disconnected from the metering circuit. Therefore, in order to prevent electric shock from induced voltage, the location of the wiring should be grounded and discharged in advance.

7. The test organization should communicate closely to ensure that the test work is carried out safely and smoothly.