More News
- Page Two
- News Links
Anarchives
Radio/TV
- Watch Live Shows and Archives
- Declare Your Independence with Ernest Hancock
Letters To Editor
- List of Letters
- Write a Letter
Join Us
Marketplace
- Buy Stuff - Sell Stuff
- Store on CafePress.com
Special Editions
RSS Feeds
About Us
Log-In

Make a Comment • Email Link • Send Letter to Editor

IPFS News Link • Science, Medicine and Technology

Smart Grid supports More Efficient Trains

07-16-2012 • arclein

. The problem is that the third rail has a very limited capacity for absorbing a sudden flood of electrical energy. As a result, the voltage of the third rail rises considerably. However, the third rail voltage is controlled within narrow limits to avoid system instabilities. If the voltage rises too much (as when slowing at a passenger stop), the excess energy must be dissipated. The third rail is then connected to a resistive load, and the braking energy is converted into waste heat.

Read Full Story

Reported By robert klein

Make a Comment • Email Link • Send Letter to Editor