The Application of Current Transformer
Let's learn the application field of current transformer today. Before that, let's review what is a current transformer.Current transformer (CT) is an instrument for measuring the high current from the primary side into the low current from the secondary side according to the principle of electromagnetic induction.A current transformer consists of a closed core and winding. As an important equipment of power system, current transformer is of great significance to circuit protection and electricity meter measurement.
From function perspective, what is the application of current transformer?
Whether the equipment is operating at the rated current value is a necessary technical measure to set the current measurement device. It is stipulated that the equipment above 40KW must be equipped with ammeter for monitoring. AC current can be measured by direct measurement and extended measurement by current transformer. Direct measurement is to connect the appropriate ammeter series current back to the circuit.
Measurement of AC electric energy In order to expand the range of an AC electricity meter. The most common method used by the factory is the current transformer to expand the measuring range.
The overload protection of high-power motors usually has no corresponding thermal relay because of the high current. In this case, the current transformer is usually installed to solve the problem, which is to convert large current into small current.
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