36
TXP Inst. & Maint. Manual: IM-825
To perform the electrical connection
for fans with frequency inverters di-
rectly on the motor, proceed as fol-
lows:
1. Connect the power supply cables
and the protective conductors at
400V as shown in the figure. For
more information, see the separate
Kostal guidelines.
Fig. 23: Size A - C
Fig. 24: Size D
Designation
Occupancy
L1
Line phase 1
L2
Line phase 2
L3
Line phase 3
N
Neutral
Designation
Occupancy
ON
Protective
2. When connecting the protective
conductor, note the information in
the section Protection by fault cur-
rent circuit breakers ( circuit
breaker), see page 34.
3.
WARNING!
If the second pro-
tective conductor is
omitted, a ca-
ble break in the protective conduc-
tor of the power supply may result
in an error. The housing of the fan
is then put under tension and can
lead to serious injury or death on
contact. Therefore, use a second
protective conductor.
The electrical connection of
fans with frequency inverter is
completed.
5.5.2 Connection IV Fans
Preconditions:
•
Frequency inverters Omron and
Kostal can be operated at 50 and
60 Hz input frequency
•
Supply voltage must match the in-
formation on the nameplate of the
frequency inverter
•
The supply voltage on the fre-
quency inverter can be between
400 and 480 V. The frequency in-
verter converts the supply voltage
to the required motor voltage of
400V.
•
Installation of wiring must conform
with local building codes, or in the
absence of local codes, with the
National Electric Code ANSI/NFPA
70 - Latest Edition70. Unit must be