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Chapter 12 Helpful information
This connection takes place in the central earthing point (CEP). This CEP is to be implemented
at the point with the largest to be expected short-circuit / earth current. It has to be
dimensioned accordingly. The CEP is also be implemented such that a measurement /
monitoring of the current at this point at any time is possible without any further risk.
gives an overview of such an installation.
Feed-in points located at a distance from each other and the respective Power supply systems
are to be considered as independent TN-S networks and are to be interconnected exclusively
via existing PA / earth lines.
The connecting of the N-conductors of these separate networks with each is
FORBIDDEN!
Power Environment
Introduction
The presented work provides an overview of the discussed topics Electrical earthing systems,
Residual Current Circuit Breakers (RCCBs), UPS Units, Emergency Power Systems (Electrical
Power Generators) and does not claim to provide complete information.
Electrical earthing systems
The descriptions of the different electrical earthing systems summarised below can also be
retrieved from the majority of utility power companies, the relevant professional associations
and qualified specialist companies, e.g.
206
6U Rack or Tower UPS RT8kVA and RT11kVA IUOMG
Figure 58
STRICLY
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