Besides calculation and measurement methods this guideline provides limit values for voltages and/or currents which are generated in telecommunication systems by one or more high voltage systems. The frequency range of this guideline includes 0 Hz up to 9 kHz. The fundamental frequencies for the covered alternating current high voltages systems ist 50 Hz for energy supply systems and 16.5 Hz and 50 Hz for train systems. Direct current high voltage systems are also considered.
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