## 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

## Why can a 50Hz CT work on 60Hz systems, and why can’t a 60Hz C.T. work on a 50 Hz system?

CT or PT functions on the principle of electromagnetic induction. The electrical energy is first converted into magnetic energy and again the magnetic energy is … Read more

## Current Transformer – Construction, Phasor and Errors

We shall discuss current transformer – Construction, Phasor and Errors in this post. Current transformer are widely used for measuring the high current.The Current transformer … Read more

## Instrument Safety Factor of Current Transformer

The current transformer is used for measuring the current.The specifications of the measuring class CT is as given below. The Instrument Safety Factor (ISF) is very … Read more

## How to Calculate Burden of CT

Burden of the current transformer is expressed in VA. The total VA burden should be taken into account when CT is used for measuring or … 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 very important in the perspective of … Read more

## Accuracy Class Of Current Transformer

Current transformers are used for measurement of electrical parameters like ampere, power, and energy. CTs are also used for measuring the current at fault condition, … 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

## Why CT Secondary Shall Never Be Kept Open?

Construction of Current transformer: The current transformer basically consists of an iron core upon which primary and secondary winding are wound. The primary winding of … Read more