Elmo PSS 6U - Manual (Page 15)

Elmo PSS User Guide Installation
MAN-PSSUG (Ver. 3.01)
3-2
The AC power supply can be of any voltage in the range defined in the technical
specifications (
section 2.4 ). It must be able to deliver power to the amplifiers (including
peak power), without significant drops. A three-phase supply is always recommended
whenever possible, in order to provide better DC bus voltage stability (low voltage
ripple) under high load conditions.
The recommended AC voltage is:
1.2 x VAC (min) < VAC < 0.9 x VAC (max)
With a single-phase supply, a voltage drop due to loading is expected. The
magnitude of the voltage drop depends on the load current, stiffness of the power
source and the total bus capacitance.
3.2.3 Wiring Diagrams
3.2.3.1 Isolated AC Supplies
AC
AC
AC
+Vs
DC power common
Heatsink
Fuse
Fuse
Fuse
Isolating transformer
PSS
Figure 3-1: Isolated PSS Wiring
Ground the DC power common.