Tag: Power systems
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A Detailed Note on the Benefits and Working of Automatic Voltage Controllers
Automatic voltage Controllers hold a regular voltage level to electrical tools loads that require a steady, dependable voltage supply. With a range of voltage regulation equipment to select from, it can be difficult to pick the excellent one for your … Read more
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Basic Elements of a Digital Controller for a Steam-Turbine Driven Generator
The block diagram below illustrates the basic elements of a minicomputer system for speed and voltage control as well as data acquisition of a steam-turbine driven generator unit. Figure (a) computer control of a turbo generator unit Typical output variables … Read more
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Key Factors to Consider In Substation Design
Substations are the points in the power network where transmission lines and distribution feeders are connected together through circuit breakers or switches via busbars and transformers. This permits the control of power flows in the network and the normal … Read more
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Types of Insulators used in Power Systems
We have various types of overhead line and substation insulators. Generally they can be classified as: Post insulators Cap and pin insulators Long rod insulators Post Insulators The post insulators comprise of pedestal posts and solid core cylindrical types. Pedestal … Read more
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How Ground Fault Interrupter (GFI) is used as a Safety Device
The function of a ground fault interrupter (GFI) is to disconnect the power if a current leakage to ground is detected. GFI is also termed to as Ground fault circuit interrupter (GFCI). We have two types of ground fault interrupters: … Read more
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Single-phase and Three-phase Power Systems
Single-phase Power System To help us understand single-phase power system, consider the sine wave shown in figure 1(a) below of a 120 Vac single-phase power connected to a plug. Figure 1(a) 120 Vac single-phase power waveform and a … Read more
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Alternating Currents and Voltages
Alternating current generator Let’s consider a signal turn coil rotating freely at a constant angular velocity symmetrically between the poles of a magnet as illustrated below: Figure 1(a) Simple single-loop ac generator The ends of the loop are terminated in … Read more
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Switchgear Equipment
Switchgear can be defined as equipment used for controlling, regulating and switching ON and OFF power circuits. Switchgear units range from the small moulded-case unit circuit breakers in a household panel board to the huge, air break switches on 750 … Read more