No Load Losses in Transformer
What are No-Load Losses( Excitation Losses)? Transformer no-load losses occur when the transformer is excited at the rated voltage and frequency, keeping its secondary open … Read more
Machines
An electrical machine converts mechanical energy into electrical energy or vice versa. The transformer is also an electrical machine which transform the voltage without changing the frequency. We will discuss about the;
- DC Motor
- DC generator
- Induction Motor
- Transformer
- Electrical drives
- Alternator or synchronous generator
Starting Torque Of DC Motor
The Starting torque is the maximum torque that a motor can deliver to the mechanical load for its rotation. DC motor is capable of delivering … 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
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