Category Archives: Protections & Interlocks

Protection Relay

What is Protection Relay? A relay is nothing but a sensor, which senses an abnormal condition of an electrical circuit and closes its contacts. These contacts in turns close and complete the circuit breaker trip coil circuit which trips the circuit breaker by isolating the faulty portion of the electrical system from the healthy portion. […]

“Loss of Excitation” Protection in Generator

Alternator,when connected to the grid, it is preferred to operate it in lagging Power Factor mode and in lagging power factor mode it delivers Reactive power and Active power to the grid and the rotor speed is same as that of grid frequency, which is 3000 RPM as per 50 Hz in India.Loss of excitation will […]

Boiler Protection (FSSS)

New generation thermal power plants are larger in capacity and having sophisticated firing systems, which are more expensive. So it has become necessary to have a coordinated fuel burner management system. Why Boiler Protection System? Inside the furnace, for ignition purpose we generally use HFO (Heavy Furnace Oil), LDO (Light Diesel Oil) and Coal as […]

Faults in Generator

Generators are the most expensive equipment in the whole plant and the generator faults are considered to be the serious since they may cause severe and costly damage to the insulation, windings and the core. They may cause severe mechanical damage to the shafts and couplings, thereby increasing the amount of fault damage. In the […]

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