Seminar Topic: System Component and Protection Devices

Introduction:
While we take advantage of the tremendous benefits electricity can provide, we must be careful to protect the people and systems that use it . It is necessary then, that the mighty force of electricity be kept under control at all times. If for some reason it should get out of control, there must be a method of protecting people and equipment that use electricity. Devices have been developed to protect people and electrical circuits from currents and voltages outside their normal operating ranges.

Difficulty : Medium

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Seminar Topic: Power Factor

Introduction:
The power factor of an AC electric power system is defined as the ratio of the real power flowing to the load to the apparent power in the circuit, and is a dimensionless number between 0 and 1 (frequently expressed as a percentage, e.g. 0.5 pf = 50% pf). Real power is the capacity of the circuit for performing work in a particular time. Apparent power is the product of the current and voltage of the circuit. Due to energy stored in the load and returned to the source, or due to a non-linear load that distorts the wave shape of the current drawn from the source, the apparent power will be greater than the real power.

Difficulty : Medium

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