Identify the distribution system – ERICO TSG Series Surge Reduction Filters (TSG-RSF) User Manual
Page 9
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9
Identify the Distribution System
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Figure 3. TN-S system: In this system, a separate neutral and protective earth conductor are run
throughout. The protective PE conductor can be the metallic sheath of the power distribution cable or a
separate conductor. All exposed conductive parts of the installation are connected to this PE conductor.
Figure 4. TN-C-S system: In this system, a separate neutral and protective earth functions combine in a
single PEN conductor. This system is also known as a Multiple Earthed (MEN) system and the protective
conductor is referred to as the combined neutral earth (CNE) conductor. The supply PEN conductor is
earthed at a number of points throughout the network and generally as close to the consumer’s point
of entry as possible. All exposed conductive parts are connected to the CNE conductor.
E535IS06ENAS 10/6/06 11:12 AM Page 9
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