Contents
What is feeding post in electric traction?
Feeding Post (FP): It is a supply control post, where the incoming feeder link from grid substation are terminated. Each feeder supplies the OHE on one side of the feeding post through interrupters controlling supply to the individual lines.
How does railway electrification work?
A railway electrification system supplies electric power to railway trains and trams without an on-board prime mover or local fuel supply. Both overhead wire and third-rail systems usually use the running rails as the return conductor, but some systems use a separate fourth rail for this purpose.
What is SP and SSP in railway?
Sectioning and-Paralleling Post (SP) 10207. Sub-Sectioning and Paralleling Post (SSP)
Why are using 50hz supply in electrical traction system?
The high-voltage distribution system at 50 Hz supply is converted to this electric motor rating by transformers and frequency converters. This system employs two overhead lines, and the track rail forms another phase, but this raises many problems at crossings and junctions. Advantages; Fewer substations are required.
Which type of motor is suitable for electric traction?
Many single phase ac motors have been developed for traction purposes but only compensated series type commutator motor is found to be best suited for traction. Single phase induction motors have been abandoned as they are not capable of developing high starting torque.
What is the main consideration of feeder in a distribution system?
A feeder is a conductor which connects the sub-station (or localised generating station) to the area where power is to be distributed. Generally, no tappings are taken from the feeder so that current in it remains the same throughout. The main consideration in the design of a feeder is the current carrying capacity.
What are the feeders in distribution system?
Feeder transmits power from Generating station or substation to the distribution points. They are similar to distributors except the fact that there is no intermediate tapping done and hence the current flow remains same at the sending as well as the receiving end.
What does it mean to back feed a generator?
Back feeding occurs when power has not been isolated to a specific location, like your home. When a power outage occurs, many people pull out the portable generator and will plug it into a dryer outlet or some other non-approved method to power the items in their home while the utility power is lost.
What happens when electrical back feeding is used?
Back feeding allows for unfiltered electricity to flow through circuits and can cause an overload of some of the equipment or appliances that are on those circuits. Simply put, overloading those circuits can cause a your television to burn up or a meltdown of your computer and sensitive electronics.
How are light rail cars linked to the power source?
While the third rail on subway track is installed in a protected environment inside the subway tunnel, light rail can be subject to weather. Light-rail cars are linked to the power source via catenary wires installed overhead 12 to 16 feet above ground.
How is traction power collected at a substation?
In some cases, these will be supplemented by negative return feeder cables. ⢠Return system cables connecting the running rails to the substation. ⢠In some cases, a system of corrosion control drainage cables to collect stray traction power current and take it back to the appropriate substation.