26
AXOR Industries
Service Manual
Magnum400
TM
ver.2 rel.05/'15
2.9 Supply connections
auXiliaRy 24Vdc
note:
•
always insert a power relay or a thermal magnet on every phase of the products power
supply.
• If a power supply between 400V and 480V is utilized and ground protection is not present, or there
is an asymmetrical grounding system, an
isolation transformer
is required.
The
nominal power of the transformer
is calculated by adding the various wattage of each mo-
tor:
pt = pn+pn+pn+...
Pt= nominal power of the transformer (VA)
Pn= nominal power of each motor (VA), which can be calculated in this way:
pn = n x cn / 9,55
Pn=nominal motor power (W)
n= motor speed (rpm)
Cn= motor nominal torque (Nm)
POWER SuPPly
note
:
•
Accepted voltage:
+24vdc
(0%/+15%);
•
current required for the external supply:
3a
(motor with brake);
•
current required for the external supply:
1a
(motor without brake);
•
we suggest to insert the
f
3
(6A T) fuse;
• we suggest to connect the 0V of the external supply to the ground bar .
external supply
+24vdc
+24V
0V
L
L
DC
AC
3
1
PE
+24V
0V
F
3
2
F
2
F
2
F
2
MAGNUM400
TM
M3
L1
L2
L3
AC
DC
4
1
2
3
PE
F
2
L1
L2
L3
M4
MAGNUM400
TM
3/PE
50/60Hz
400...480V
F
2
F
2
