Standby Mode; Figure 3-4, Power Flow - Standby Mode (Ms2012/2812/2024/4024/4048); Figure 3-5, Power Flow - Standby Mode (Ms2000 Models) - Sensata Magnum Energy MS Series Owner's Manual

Operation
3.2

Standby Mode

The MS 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, an 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 power failure. Refer to Figures 3-4, 3-5, and 3-6 to see the fl ow of power
from the AC input to the DC and AC output while in Standby mode.
AC
IN
AC HOT 2 IN
240
AC HOT 1 IN
VAC
120
VAC
120
VAC
AC NEUTRAL IN
AC GROUND
DC
DC NEGATIVE
OUT
DC POSITIVE
Figure 3-4, Power Flow – Standby Mode (MS2012/2812/2024/4024/4048)
AC
IN
AC HOT 1 IN
120 VAC
AC NEU IN
AC GROUND
DC
DC NEG
OUT
DC POS
Figure 3-5, Power Flow – Standby Mode (MS2000 models)
Page 47
AC Hot
Transfer Relay
CB3 (30A)
Neutral-Ground
AC
DC
FET Bridge
AC Hot
Transfer Contact
INPUT
(30A)
Neutral-Ground
Transfer Contact
AC
DC
FET Bridge
Power Transformer
1
CB2
CB1
Transfer Relay
Power Transformer
© 2016 Sensata Technologies
AC
OUT
AC HOT 2 OUT
240
AC HOT 1 OUT
VAC
1
120
AC NEUTRAL OUT
VAC
Note¹: Output
breakers only
available on
MS2012-15B,
MS2012-20B, &
MS4048-20B
models.
AC HOT 1 OUT
120 VAC
AC NEU OUT
AC
OUT
120
VAC