Operating instructions

24
HEATING 1P 2P* / 3P 3P
ELEMENTS
IN SERIES FOR
EACH STRAND STAR CONNECTION DELTA CONNECTION STAR CONNECTION
WITHOUT CONNECTED WITH CONNECTED
NEUTRAL CONDUCTOR NEUTRAL CONDUCTOR
6 10% 7% 6% 10%
5 13% 8% 7% 13%
4 17% 10% 9% 17%
3 25% 14% 13% 25%
2 50% 25% 26% 50%
TAB. 3 PARTIAL SHORT-CIRCUIT WITH HEATING ELEMENTS SWITCHED IN SERIES, OVERCUR-
RENT, RELATIVE MONITORING
* for Thyro-P 2P: additional external converters in phase L2 are possible.
Thyro-P determines the load conductance separately for each phase. These values are available
from LBA-2, Thyro-Tool Family and the Bus interface. The current resistance can be determined
by reading out and converting from the conductance.
Star connection
with neutral conductor
Star connection
without neutral conductor
Delta connection