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
Electrical
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
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