Eltroplan REVCON RLD, Руководство пользователя

Страница: 23 / 98

Safety information
22 Operating instructions RLD
ELTROPLAN
-
REVCON

Elektrotechnische Anlagen GmbH
Line and contact resistances
The values of current carrying capacity of conductors refer to the most often used copper
conductors. Concerning to its higher specific resistance aluminium conductors must have
greater dimensions.
Regardless of which conducting material is used, the contact terminals of the conductors
have to be low resistive and their number has to be reduced to the necessary minimum.
Too much or too high resistive terminals may result in an unsafe voltage magnification
during the power feedback operation.
M
FC
 U 
U

U

U

U

U

U
I
Supplying
network
REVCON
Figure 2.5.4
Proceeding from a stable network with e.g. 400V nominal voltage and a backward current
of 80A, at a bad made terminal of 100mW a voltage of 8V is dropped (a good made ter-
minal has got a resistance of ca 1 mW). During feedback operation at seven serial termi-
nals at the net switch results a voltage of 456V.