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- Words:
- 1299
- Submitted:
- Tue Mar 31 2009
- Mark submitted by Author:
... Supertram Introduction: Sheffield's Supertram is a vast network of tracks linking the whole city together. The Sheffield supertram is run by stagecoach. The supertrams employ many aspects of physics in there day to day running I am going to discuss two of these namely regenerative breaking and Three Phase power supply: The trams are supplied with electricity through the series of overhead cables which run above all the tracks. The trams then utilise a three phase power supply of 3x 380 V, 100Hz, 13kVA and a DC supply of 24 V, 5kW these originate in the 12 substations that are spread around the city at different maintenance points. The three phase power supply is an alternating current supply with 3 voltages operating at 120° out of phase (see below). All the currents have identical wavelengths and frequencies just out of phase. Having a three phase supply means the trams are supplied constantly with
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