Tap changers are voltage regulation equipment used to adjust the voltage ratio in transformers by adding or removing tapping turns. Voltage adjustments can be made by using either on-load tap…
Grounding transformers are used to obtain a neutral when an existing delta-connected or ungrounded systems are to be grounded. These transformers provide a path for the flow of fault currents…
Here is a calculator that can be used to calculate torque from speed and speed from torque. Torque-speed calculator Enter motor torqueN.mlb.inlb.ftEnter motor powerhpkWCalculateResultMotor speedrpm Speed-torque calculator Enter the motor…
A Rogowski coil is an electrical transducer, that functions similar to a current transformer and is used in a variety of applications to measure alternating current (AC). It is named…
The power and control circuits of a star-delta starter are discussed in this article with the help of an actual star-delta starter wiring diagram. You can find the instructions to…
Transformers are the most efficient electric machine. A typical transformer is over 99% efficient. The small inefficiency is due to copper losses, core losses-hysteresis and eddy currents losses, stray and…
Transformer windings constitute the electrical circuit of a transformer. They are made up of current-carrying conductors wound around the core. The primary windings form the input to the transformer and…
Insulation materials are one of the most important elements in a transformer. They are used to electrically separate the conducting parts of a transformer from each other and from other…
A transformer core serves the following three important purposes: Provides mechanical support to the windings.Provides a low reluctance closed ferromagnetic path to the magnetic flux.Reduces the losses due to flux…
In electric machines, a varying magnetic field causes eddy currents in all metallic parts and hysteresis in ferromagnetic core. The losses caused due to eddy currents are known as eddy…