Rockwell Automation 20Y PowerFlex Active Front End - Manual (Page 89)

Rockwell Automation Publication 20Y-UM001E-EN-P - July 2014 89
Startup Chapter 3
The precharging of the unit automatically starts when input power is
present. When the DC Bus Voltage reaches its nominal value, the
circuit breaker automatically closes.
To stop the AFE, turn the 0-1-START switch to 0 (off ).
NOTE: Pressing the (Stop) key on the HIM only stops the AFE
output—it does not open the MCCB to stop the AFE.
When a voltage drop or a blackout occurs in the supplying network, the
unit precharges automatically and closes the circuit breakers when the
main supply voltage returns.
2. MAN —Manual operation by the 0-1-START switch on the enclosure
door.
a. Set the MCCB CONTROL switch to MAN.
b. Turn the 0-1-START switch to START and let it automatically return
to 1.
The precharging takes about 5-10 seconds depending on the connected
DC bus capacitance. When the DC bus voltage has reached its nominal
value, the AFE control automatically closes the circuit breaker.
The precharging can be aborted by turning the switch to 0 (off ).
To stop the AFE, turn the 0-1-START switch to 0 (off ).
NOTE: Pressing the (Stop) key on the HIM only stops the AFE
output—it does not open the MCCB to stop the AFE.
When a voltage drop or a blackout occurs in the supplying network, the
under voltage release coil opens the circuit breaker. To turn on the AFE,
turn the 0-1-START switch to START and let it automatically return
to 1 (on).
3. REM —Remote operation with signals to the control terminals.
a. Set the MCCB CONTROL switch to REM.
b. Connect a normally closed (NC) contact to terminals X1:58 and
X1:61.
This contact has to be in the NC-state for the AFE to precharge and
run. A remote pulse of 0.4…1.0 second duration connected to terminals
X1:57 and X1:60 starts the precharging of the AFE. When the DC
voltage has reached its nominal value, the AFE unit automatically closes
the circuit breakers.
To stop the AFE, turn the 0-1-START switch to 0 (off ).
NOTE: Pressing the (Stop) key on the HIM only stops the AFE
output—it does not open the MCCB to stop the AFE.
When a voltage drop or a blackout occurs in the supplying network, the
undervoltage release coil opens the circuit breaker. When the supply is
restored, the precharging and MCCB closing must be re-initiated. To
turn the AFE on, turn the 0-1-START switch to START and let it
automatically return to 1 (on).