Magnum Energy MS-G Series - Manual (Page 50)

Page 42
©
2015 Sensata Technologies
Operation
3.2 Standby Mode
The MS-G Series features an internal battery charger and an automatic transfer relay when
operating in Standby mode. Standby mode begins whenever AC power (utility or generator) is
connected to the inverter’s AC input. Once the AC voltage and frequency of the incoming AC power
is within the AC input limits, the automatic AC transfer relay is activated. This transfer relay passes
the incoming AC power through the inverter to power the AC loads on the inverter’s output. This
incoming power is also used to activate a powerful internal battery charger to keep the battery
bank charged in case of a power failure. Refer to Figures 3-3 & 3-4 to see the fl ow of power from
the AC input to the DC and AC output while in Standby mode.
Figure 3-2, Power Flow – Inverter Mode (MS2000-G model)
120 VAC
AC NEU OUT
GFCI
120 VAC
OUTPUT
Neutral-Ground
Transfer Contact
AC Hot
Transfer Contact
AC HOT 1 OUT
AC HOT 1 IN
INPUT
(30A) AC NEU IN
AC GROUND
GFCI
(20A)
DC
IN
Power Transformer
FET Bridge
AC
DC
DC POS
DC NEG
AC
OUT
Figure 3-3, Power Flow – Standby Mode (MS2012-G/2812-G/4024-G models)
120
VAC
AC
OUT
Neutral-Ground
Transfer Relay
AC Hot
Transfer Relay
AC HOT 1 IN
AC HOT 2 IN
INPUT
(30A)
AC NEU IN
AC GROUND
Power Transformer
FET Bridge
AC
DC
DC
OUT
AC HOT 2 OUT
GFCI
(20A)
DC POSITIVE
DC NEGATIVE
AC NEU OUT
240
VAC
120
VAC
120
VAC
AC
IN
GFCI
120 VAC
OUTPUT