16-08-2012, 02:11 PM
TESTING OF EQUIPMENTS IN SWITCHYARD
TESTING OF EQUIPMENTS IN SWITCHYARD.pptx (Size: 2.2 MB / Downloads: 48)
Switchyard
Switchyard is the place where electrical power is supplied to the plant from the outside, and electrical power is sent from the plant.
Cooling Tower
The cooling tower is a semi-enclosed device for evaporative cooling of water by contact with air. The hot water coming out from the condenser is fed to the tower on the top and allowed to tickle in form of thin sheets or drops. The air flows from bottom of the tower or perpendicular to the direction of water flow and then exhausts to the atmosphere after effective cooling.
Current Transformer
A current transformer (CT) is used for measurement of electric currents.
Current transformers are commonly used in metering and protective relays in the electrical power industry.
Circuit Breaker
These are switching devices, design to close or open an electrical circuit under normal or abnormal conditions. Types based on interrupting medium; Air blast circuit breaker Air break circuit breaker Bulk oil circuit breaker Minimum oil circuit breaker SF6 circuit breaker Vacuum circuit breaker.