Category Archives: Electrical Devices

Balun Transformer – Balanced vs Unbalanced Transmission Lines

What is a balun? A Balun is special type of transformer that performs two functions i.e. impedance transformation and balanced to unbalanced transformation. The term balun is a contraction of “balanced to unbalanced transformer” Why do we need a balun? Baluns are important because many types of antennas (dipoles, yagis, loops) are balanced loads, which… Read More »

How to use a Fluke Digital Multimeter

What is a Digital Multimeter? Digital Multimeter also famous as DMM is simply an electronic instrument that measures electrical parameters including AC/DC volts, AC/DC current, resistance. In addition digital multimeter may have a variety of special features that are designed for a wide number of applications like frequency, temperature, capacitance and continuity in a circuit.… Read More »

Everything About PCB Printed Circuit Board

The pcb full form is printed circuit board which is an insulating board as a base material. A PCB is the backbone of any electrical device. Circuit boards are manufactured using the non conductive base board cutting it to some dimension with a conductive pattern and hole. Holes are for different purposes i.e. component holes, fasten holes, plated… Read More »

Cable Tray Raceway Fill and Load Calculations

Cable tray / raceway is integral part of any cable management system. Selection of cable tray is very critical because if cable tray size is not sufficient the cables may become damaged due to improper handling and excessive heating etc. On the other hand cable tray supporting system can not be neglected as well since… Read More »

Voltage Stabilizer & How it Works

What is voltage stabilizer? Voltage stabilizer is an equipment that stabilizes voltage. The process of stabilization happens by bringing voltage to a desirable level whenever there is any kind of fluctuation in the power system. Therefore we can say that voltage stabilizer is a current regulator used to maintain and control voltage to produce a… Read More »

Electrical Busbar Protection – Differential Relay Function

Differential busbar protection is the most common and reliable scheme for the bus bar protection. Earlier there was no other option to use only conventional over current relays for busbar protection. But it is desirable that fault in any feeder or transformer connected to the busbar system should not disturb overall busbar system. Due to… Read More »