## What is the difference between 0.2 and 0.2S class CT?

The metering class current transformer is used for metering the energy for revenue purposes. Therefore, the metering class current transformer must be as accurate as … Read more

## Current Transformer – Construction, Phasor and Errors

This article describes the current transformer – construction, Phasor, and Errors. Current transformers are widely used for measuring high currents. The Current transformer steps down … Read more

## What is meaning of 5P20 in current transformer?

There are three types of current transformers which are used for various applications. 1. Metering Purpose2. Protection Purpose3. Special Protection Purpose The particular class of … Read more

## How to Calculate Burden of CT

The burden of the current transformer is expressed in VA. The total VA burden should be considered when CT is used for measuring or protection … Read more

## Current Transformer Secondary Grounding

According to the ANSI guide, the IEEE standard specifies the current transformer grounding practices. The grounding of the current transformer is critical from the perspective of safety … Read more

## Accuracy Class Of Current Transformer

The accuracy class of a CT refers to the permissible error limits of the CT over a specified range of conditions. It ensures that the … Read more

## Magnetization Curve of CT

The magnetization curve of the current transformer shows the relationship between the secondary excitation current and secondary excitation voltage. The equivalent circuit diagram of the … Read more

## How to Calculate Knee Point Voltage of Current Transformer?

What is the knee point voltage of CT? The knee point is defined as the voltage at which a 10% increase in applied voltage increases the magnetizing current by 50%. … Read more

## What is the Use Of Knee Point Voltage?

In this article we will discuss the use of knee point voltage of current transformer in the protection circuit. The knee point voltage of CT … Read more

## Why CT Secondary Shall Never Be Kept Open?

Open-circuited CT can cause serious safety concerns like fire, electrocution, and protection failure. Therefore, you must ensure that CT secondary should always be close-circuited. Let … Read more