Current and voltage sensors need to pay attention to those problems when using

- Jun 24, 2020-

1. The current and voltage sensors must select products of different specifications according to the rated effective value of the measured current. If the measured current exceeds the limit for a long time, it will damage the final power amplifier tube. It is magnetically compensated. Under normal circumstances, the duration of twice the overload current shall not exceed 1 minute.

2. The best accuracy of the current and voltage sensor is obtained under the conditions of the original rated value, so when the measured current is higher than the rated value of the current and voltage sensor, the corresponding large sensor should be selected; when the measured voltage is higher than the voltage sensor At rated value, the current limiting resistor should be readjusted. When the measured current is less than 1/2 of the rated value, in order to get the best accuracy, the method of multiple turns can be used.

3. Sensors with insulation withstand voltage of 3KV can work normally in AC systems of 1KV and below and DC systems of 1.5KV and below for a long time, and sensors of 6KV can work normally in AC systems of 2KV and below and DC systems of 2.5KV and below for a long time. Be careful not to use overpressure.

4. When used on a device that requires good dynamic characteristics, it is best to use a single copper and aluminum bus bar and coincide with the aperture. Large or small turns or multiple turns will affect the dynamic characteristics.

5. When it is used in a high-current DC system, the working power supply is opened or malfunctions due to some reason, and the core produces a large residual magnetism, which is worth noting. Residual magnetism affects accuracy. The method of demagnetization is not to add the working power, pass an AC on the primary side and gradually reduce its value.

6. The temperature of the primary current bus should not exceed 85℃, which is determined by the characteristics of ABS engineering plastics. The user has special requirements and can choose high-temperature plastics as the shell.