2. Physical descriptions of ground networks
2.1 Electrical safety ground line
Electrical power is generally supplied by three-phase transformers with a primary input of 25 kV phase-to-phase at a frequency of 50 Hz. The secondary supplies power at 380 V phase-to-phase, with neutral output. This means that energy capture by a single-phase electrical installation or equipment takes place between phase and neutral with a nominal voltage of , i.e. a potential difference of 220 V.
In most distribution substations, the neutral conductor is earthed via a resistorR N connected to a local earth connection; figure...
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Physical descriptions of ground networks
Main protocols for connecting shielded cables to earth
Bibliography
Websites
Grounding and bonding, advances in the telecommunications http://www.atis.org/peg/docs2000/treyfney.pdf
Mike Holt Enterprises http://www.mikeholt.com/Powerquality/Powerquality.htm
Dallas semiconductor...
Standards and norms
- Bonding configurations and earth inside a telecommunications building. Standard on Telecommunications, Recommendation K.27 (Previously CCITT Recommendation) - ITU-T - 05-96
- TEMPEST Standards - NATO SDIP-27, NATO SDIP-29 -
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