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A-14
1
1.4.4 Installing the transformers on VFAS1
As for VFAS1-6110KPC and above, the transformer unit(TRS) and Inverter are put in one packing box.
The procedure that takes out TRS from a packing box and installation procedure to a panel are described
by the additional manual.
TRS is a transformer for supplying a power supply to cooling fans.
The diagram below is the connection between TRS and cooling fans.
IM
U/T1
V/T2
W/T3
R/L1
S/L2
T/L3
RO
SO
TO
∞
Fan
TRS (Transformer unit)
Three-phase
400~480V-60Hz
400~440V-50Hz
External fan
power supply
Three-phase
500~690V-50/60Hz
Transformer fo
r
Fan power suppl
y
X0
X2
PFL
MC
MCCB
*1
*2
*2
*1: The connecting positions of X2A and X2B are different between 500/600V and 690V input power source.
⇒ For more details, refer to A-15.
*2: It is necessary to change the connection of the fan power supply inside of the inverter when you drive
the cooling fan by an external power supply.
⇒ For more details, refer to A-16,17.
*1
VFAS1-6110KPC and above
Connectors for Fan
power supply