1. Residual current transformer wiring Before installing the residual current transformer, it is necessary to identify the phase line, N line and PE line in the power network. The phase line and the N line should pass through the residual current transformer together as much as possible, and the PE line should not pass through the…
Ferrite is a material that is relatively cheap in magnetic materials, and has good magnetic permeability and magnetic saturation strength, so it is now used in many current transformers, and in open-close current transformers, it is often based on customers. Therefore, we choose ferrites of different materials, such as PC40 and high-conductivity ferrite. We know that…
Electronic current transformers are based on Rogowski coils with small size, light weight, wide frequency band, factors that more or less affect the accuracy of the coil in the measurement operation, such as the size of the circuit conductor under test relative to the coil, and external electromagnetic interference. , The circuit under test has…
What is the Rogowski coil? The Rogowski coil is a flexible clip-on hybrid inductor coil that can be easily coiled around a current conductor for measuring. It is capable of measuring large currents of several thousand amperes without expanding the size of the voltage transformer. Rogowski coils are electronic voltage transformers used to measure alternating currents such as…
1)The wiring of the current transformer should follow the series principle: the primary winding should be connected in series with the circuit under test, while the secondary winding should be connected in series with all loadded instruments. 2)Selecting appropriate transformation ratio according to the measured current, otherwise the error will be larger. At the same time, one side of the…
The size of the current varies tremendously in the power generation, power transformation, power transmission, power distribution and power circuit, from several Amp to thousands of Amp. In order to facilitate measurement, protection and control, it needs to be converted to a relatively uniform current. In addition, the voltage of circuit is high and may cause danger when…