An Oil Circuit Breaker (OCB) is a type of circuit breaker that uses insulating oil as both an arc-quenching medium and an insulating medium. The oil is vaporized during the interruption process, producing gases that effectively cool and extinguish the arc formed when contacts separate under load or fault conditions. It is widely used in […]
A Vacuum Circuit Breaker (VCB) is a type of electrical circuit breaker that interrupts current flow and isolates a circuit during faults or maintenance by extinguishing the arc in a vacuum. The vacuum serves as the arc-extinguishing medium, offering superior insulation and rapid arc suppression. VCBs are widely used in medium- and high-voltage power systems
A Buchholz Relay is a gas-actuated safety device used in oil-immersed transformers to detect and protect against internal faults. It operates on the principle of gas accumulation or sudden oil flow caused by electrical faults inside the transformer. It is typically installed in the pipeline connecting the transformer’s main tank and the conservator.
Electrical Bus Bar is a conductor made up of copper or aluminium of larger cross-sectional area compared to the conventional conductors. It carries higher amount of currents in a limited space and to which all the incoming and outgoing feeders are connected in a substation.
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The rate of electricity to be charged is called tariff.
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Figure 1: Electrical Insulator. An electrical insulator in an overhead line is to hold the live conductor to prevent leakage of current from the conductor to the pole. These are made of porcelain clay and are thoroughly glazed to avoid the absorption of moisture from the atmosphere.
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Figure 1: Load Duration Curve.
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A TCR is a thyristor controlled inductor, connected in shunt with the line, in which the thyristor valve is controlled by partial conduction, in order to continuously vary the effective reactance of the line. TCR is a Variable impedance type static VAR generator, in which the reactor current can be varied by applying the firing
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A Static VAR Compensator (SVC) is a shunt connected static VAR generator or absorber in which control of certain power system parameters are achieved by exchanging the capacitive or inductive current which is possible by adjusting its output. SVC is a common name for a thyristor-controlled or thyristor-switched reactor, and/or thyristor-switched capacitor or combination. Figure
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