## What is True RMS Measurement? RMS Vs True RMS

What is True RMS? True RMS measurement is more reliable and accurate than RMS measurement. We express the AC voltage and current in its effective … Read more

## Breaking Capacity of Circuit Breaker

Definition: Breaking capacity or interrupting capacity of the circuit breaker is a crucial parameter for selecting the breaker for the electrical network. The short circuit … 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

## 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

## VVVF Drive- Why V/f Ratio is Kept Constant in VFD?

VVVF( Variable voltage variable frequency) control is used to control the speed of the induction motor. The VVVF drive controls the voltage and frequency simultaneously … Read more