Rockwell Automation 23P PowerFlex Digital DC Drive - Manual (Page 71)

Rockwell Automation Publication 20P-UM001K-EN-P - July 2014 71
Installation and Wiring Chapter 1
Frame D, Series B Heatsink Cooling Fan Specifications
The Frame D, series B drive cooling fan requires three phase (50/60 Hz),
400…460V AC input power. If sourced from the main 3 phase AC input, the
power supply connections must be taken from the primary side of the installed
isolation transformer or line reactor (clean power).
The cooling fan power input terminals U3, V3 and W3 are required to be short
circuit protected. This protection can be provided by using a circuit breaker or
fuses.
• If a circuit breaker is used, it must be rated for the short circuit available
current of the feeder source for this circuit and the inrush current of the
fan. Size the circuit breaker to primarily protect the wiring from the circuit
breaker connections to terminals U3, V3, and W3, and not nuisance trip
or blow from the inrush current.
• If fuses are used, they must be rated for either 400V AC, 2.5 Amps (slow
blow), or 460V AC, 3.15 Amps (slow blow).
A normally closed (N.C.) contact wired to terminals 31 and 32 of the fan
terminal block can be connected to an external device to provide indication of a
fan supply failure or can be wired to drive digital input terminals configured for
14 “Aux Fault” (via Pars 133…144).
IMPORTANT When connecting the fan power wiring, verify that the airflow exits through
the top of the drive. If the airflow is incorrect, switch the leads on terminals U3
and V3.
Airflow Direction
Airflow Direction