The intelligent transformer calibrator is also called current transformer and voltage transformer calibrator. ZC-110 intelligent transformer calibrator is mainly used for CT and PT error verification. The intelligent transformer calibrator is used in measurement and power supply departments and transformer manufacturers, and is an ideal calibration instrument…

        The CT analyzer is an indispensable instrument for on-site verification of current transformer accuracy. The traditional current transformer test method is mainly the measurement method. Due to the limitation of the principle, the on-site verification of the current transformer is extremely inconvenient. The CT analyzer designed…

       First, the detection method and experience of the resistor        Detection of fixed resistors.       The actual resistance value can be measured by connecting the two test leads (not positive or negative) to the two ends of the resistor. In order to improve…

      The voltage transformer is actually a transformer with a core. It is mainly composed of primary and secondary coils, iron core and insulation.        There are many ways to connect voltage transformers. The common ones are as follows:        (1) Using a single-phase…

     When choosing a test transformer, the main points are considered:         (1) Voltage. According to the requirements of the test sample, the test transformer with the appropriate voltage is first selected, so that the rated voltage Un of the high voltage side of the test…

       A relay is an electrical appliance that switches on or off the control circuit to complete control or protection tasks based on signals input from outside, such as electrical quantities (voltage, current) or non-electrical quantities (heat, time, speed, etc.). There are three basic parts, namely the sensing…

      When the transformer is in normal operation, it will emit a continuous and even “click” sound. If the generated sound is uneven or there are other special sounds, it should be regarded as abnormal operation of the transformer, and the fault can be found according to the…

       First, the cause of inaccurate grounding resistance detection or unstable indication or even negative value        Because the grounding resistance detector is composed of many sophisticated electronic components, it has a long detection line. Under the influence of bad environment and operation, it often causes…

2, 102 electronic meter to measure the grounding body, when the water penetrates the contact voltage and current pole, the contact resistance due to poor contact is large, which affects the measured true value. This method is only used when there is no place to insert voltage and current poles,…

      There are the following types of insulation tests: design test, production test, handover acceptance test, preventive maintenance test, and fault location test. Different test types depend on different test purposes and application areas, and different insulation test procedures have different characteristics. And we can also see that using…