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Category: Electrical Theory

Study the Electrical Engineering Study Material on core technical topics like electrical machines, generators, motors, basic electrical formulas.

To read electrical system diagrams and schematics properly, the condition or state of each component must first be understood. For electrical schematics that detail individual relays and contacts, the components...

Electrical Diagrams and Schematics

To read and interpret electrical diagrams and schematics, the basic symbols and conventions used in the drawing must be understood. This article concentrates on how electrical components are represented on...

4-Wire, Three-Phase Wye Wiring System

Unlike the single-phase wiring scheme that must make a provision for a neutral leg and separate ground, the three-phase system needs neither a separate neutral nor a ground to operate...

4-Wire, Three-Phase Delta Wiring System

Unlike the single-phase wiring scheme that must make a provision for a neutral leg and separate ground, the three-phase system needs neither a separate neutral nor a ground to operate...

3-Wire, Three-Phase Delta Wiring System

Unlike the single-phase wiring scheme that must make a provision for a neutral leg and separate ground, the three-phase system needs neither a separate neutral nor a ground to operate...

Single Phase Power Wiring Schemes

The source of single-phase (1φ) power in all facilities is by generation from a single-phase generator or by utilization of one phase of a three-phase (3φ) power source. Basically, each...

Electrical Wiring Terminology

To understand electrical wiring schemes used in power distribution systems, you must be familiar with the following terms. Ampacity – the current in amperes that a conductor can carry continuously...

Low Voltage Protection (LVP) and Low Voltage Release (LVR)

Within the two basic categories of motor controllers, there are three major types of AC acrossthe-line controllers in use today. There are low-voltage protection (LVP), low-voltage release (LVR), and low-voltage...

Motor Controllers

Motor controllers range from a simple toggle switch to a complex system using solenoids, relays, and timers. The basic functions of a motor controller are to control and protect the...

Circuit Breaker Control Circuit

As we have discussed, circuit breakers may be remotely operated. In order to operate the breakers from a remote location, there must be an electrical control circuit incorporated. The below...

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