Safety information
22 Operating instructions RLD
ELTROPLAN
-
REVCON
Elektrotechnische Anlagen GmbH
Operation on a transformer
Is the energy balance of an installation negative (i.e. even for short periods more braking
energy is fed in as the other loads in the same mains section collect), the nominal (com-
plex) power of the transformer must be at least 1,5 times higher than the in this section
fed back (real) power, to be even able to transfer the harmonic- and reactive ratio of the
currents.
Generally the short circuit voltage of the transformer should be preferably small (typical
4-6%).
Danger!
At non-observance of these connecting conditions overvoltage and mains voltage harmonic dis-
tortions are generated, which can lead to damages at the power feedback units and other con-
nected components!
Die above-named conditions are in the in figure 2.6.2 diagrammed mains section just ob-
served, if the other loads are switched off.
M
M
R
Tr
10kV
0,4kV
100kVA
60kW
20kW
20kW
FC
REVCON
Figure 2.6.2
The mains impedance of all installed feedback units should be 2 times so large as the
mains impedance, but minimum the 1,5-times of the mains impedance!
