Category: Electrical

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Capacitor Bank and Power Factor Improvement

Capacitor Bank is an assembly of capacitors which has the same rating arranged in series or parallel. In AC power supplies Capacitor Banks are mainly used to improve the power factor of the AC Loads....

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Distribution Board Wiring Diagram – How to wire DB

Distribution Board or DB is an electricity supply system or a common enclosure that distributes the electrical power feed into subcircuits. It includes isolator, RCCB (Residual current circuit breaker) or RCD (Residual-current device) devices, protective fuses or MCB’s (Miniature Circuit...

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Transformer Questions and Answers Interview Viva

  What is the operating principle of a Transformer? A transformer works based on the principle of mutual induction. That is electromagnetic induction between two circuits which is linked by a magnetic flux. What...

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Electrical & Electronics Quantities Units and Symbols

Electrical Quantity Quantity Symbol Unit Unit Symbol Admittance Y Siemens Ω−1 Apparent Power S Volt-Ampere VA Capacitance C Farad f Charge Q Coulomb C Conductance G Siemens Ω−1 Conductivity σ (sigma) siemens per metre...

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Why Transformer Rating is in kVA not in kW Explained

The power rating of a device is the maximum magnitude of power that can be allowed to operate by the device. Active power, Reactive power, and Apparent power are rated in W, VAR, and VA respectively. Active...

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Difference between MCB, MCCB, ELCB, and RCCB

An electrical circuit breaker is an automatic switching device which is installed for the safety of the electrical system. It protects an electrical circuit from electrical damages caused by conditions like overload, short circuits, earth leakage, etc. During a fault...

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Earth Ground Neutral Difference

Earth, Ground and Neutral all three are similar to each other but often confused or referred one as other. Still, it has the difference to term it separately as they serve for different purposes....

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Importance of Earthing in Electrical system

Earthing is a connection between electrical devices to the earth through a low resistance path, which provides discharge of the electrical energy directly to the earth. Considering the safety reasons earthing is one of...

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Comparison between copper and aluminium conductor

Materials made of metals will possess the property of electrical conductivity, an electrical conductor allows electric charge to flow through it. Silver is the most electrically conductive element followed by Copper, Gold, Aluminum, Zinc,...