Can Protection CT be used as Metering CT & Vice Versa?

Protection Current Transformer (CT) and Metering CT are two different types of CT as per their requirement and hence design. Therefore, Protection class CT should not be used as Metering CT. Similarly, a Metering Current Transformer should not be used for protection purpose. Let the discuss the reason behind this. Why can’t we use Protection … Read more

Composite Error of CT – Definition, Calculation & Formula

Definition: Composite Error of a Current Transformer (CT) is defined as the rms value of difference between the ideal secondary current and the actual secondary current. It includes ratio error, phase error and the effect of harmonics present in the exciting current. Composite error is used to express the accuracy of protection class CT. You … Read more

Maxwell Bridge-Measurement of Inductance

Maxwell Bridge is used for the measurement of Self-Inductance. Like other bridge, this method also works on balancing of bridge. Balancing of bridge is achieved when there is no current through the detector. Don’t worry we will be discussing everything in detail in this post. Maxwell’s Bridge employs the comparison of test specimen variable standard … Read more

RVDT – Construction and Working Principle

What is RVDT? Definition: Rotary Variable Differential Transformer or RVDT is an inductive transducer which converts angular displace to an electrical signal. Unlike LVDT, the input of this transducer is differential value of rotary variable i.e. angular rotation (dƟ) to generate voltage output. Construction: Like every transformer, RVDT has two types of winding i.e. Primary … Read more