Fagor QC-PDS - Page 196

 Selection criteria
5.
SELECTING CRITERIA
Selecting the main power supply
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198
Ref.2003
QC-PDS
HARDWARE
2. The main power supply must be capable of supplying the peak power required by the set of drives
connected to it
.
3. The range of FAGOR main power supplies that can be selected is:
T. H5/19 Second selection criterion for the main power supply of the system.
T. H5/20 Power supplies of the FAGOR catalog. They indicate: Rated power at 400 V AC, permitted range
of line voltages and if a 24 V DC auxiliary power supply is integrated or not.
SECOND CRITERIA
The main power supply must be capable of supplying the peak power required (depending on the duty cycles)
by all the motor-drive combinations connected to it.
REQUIRED PEAK POWER:
3
+
2
=
B
kW
3 s Peak power at the DC BUS
Main power supply
In kW Reference
NON-REGENERATIVE
POWER SUPPLIES
B  75
QC-PS-025
If 75 < B
 135 QC-PS-045
If B > 135 - Refer to note below -
Peak power depending on the S6-40%
duty
Main power supply
REGULATED REGENERATIVE
POWER SUPPLIES
B  39 QC-RPS-030-F 
If 39 < B  175 QC-RPS-160- 
If B > 175 - Refer to note below -
If the required peak power (calculated B value) exceeds 175 kW, then install a second main power supply.
Divide the set of drives into two groups so they can be powered by different power supplies. Refer to the
IMPORTANT NOTE below.
IMPORTANT NOTE. When using two main power supplies on the same machine, these must make up
two
independent groups with their own drives. Only the SERCOS-III BUS can be common for both
groups.
DANGER. NEVER connect the DC BUSES of the main power supplies in parallel.
ALWAYS install the two groups separately.
NON REGENERATIVE
Reference
rated output power
at the DC BUS
Three-phase line
voltage V AC
Is a 24 V DC auxiliary
power supply
integrated ?
QC-PS-025
25 kW From 400 to 480 Yes
QC-PS-045
45 kW From 400 to 480
No
REGENERATIVE
Reference S1/S6-40% input
power at the DC BUS
Three-phase line
voltage V AC
Is a 24V DC auxiliary
power supply
integrated ?
RPS MODE
QC-RPS-030 30 kW / 39 kW From 400 to 480 No
QC-RPS-160 160 kW / 175 kW
From 400 to 480
No