Standby Mode; Figure 3-2, Power Flow - Standby Mode (Single In); Figure 3-3, Power Flow - Standby Mode (Dual In) - Magnum Energy MagnaSine Hybrid MSH3012RV Owner's Manual

Operation
3.2

Standby Mode

The MSH3012RV features an automatic transfer relay and an internal battery charger when operating
in Standby mode. The Standby mode begins whenever AC power (shore power or generator) is
connected to the inverter's AC input. Refer to the fi gures below to see the fl ow of power from the
AC input to the DC and AC outputs while in Standby mode.
When a 120VAC only source is connected to the AC HOT 1 IN terminal (i.e., Single In), this AC
source passes-thru to both the AC HOT 1 OUT and AC HOT 2 OUT terminals as shown in Figure 3-2.
AC HOT 2 IN
AC HOT 1 IN
120
AC
VAC
IN
AC NEUTRAL IN
AC GROUND
DC
DC NEGATIVE
OUT
DC POSITIVE
Figure 3-2, Power Flow – Standby Mode (Single In)
As shown in Figure 3-3, when a 120/240VAC split-phase (or 120/208VAC three-phase) source is
connected to the AC HOT 1 IN and AC HOT 2 IN terminals (i.e., Dual In), each input will pass-thru
to its respective output. There is a delay connecting to the two inputs; this delay is designed to
allow better transfer behavior.
AC HOT 2 IN
240VAC
or
208VAC
120
AC
VAC
AC HOT 1 IN
IN
120
VAC
AC NEUTRAL IN
AC GROUND
DC
DC NEGATIVE
OUT
DC POSITIVE
Figure 3-3, Power Flow – Standby Mode (Dual In)
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CB2
(50A)
CB1
(50A)
Neutral-Ground
Transfer Relay
AC
DC
FET Bridge
CB2
(50A)
CB1
(50A)
Neutral-Ground
Transfer Relay
DC
FET Bridge
AC Hot 2
Transfer Relay
AC Hot 1
Transfer Relay
AC
Output
Relay
Power Transformer
AC Hot 2
Transfer Relay
AC Hot 1
Transfer Relay
AC
Output
Relay
AC
Power Transformer
© 2020 Sensata Technologies
AC HOT 2 OUT
0
VAC
120
VAC
AC HOT 1 AC
OUT
OUT
120
VAC
AC NEUTRAL
OUT
AC GROUND
AC HOT 2 OUT
240VAC
or
208VAC
120
VAC
AC HOT 1
OUT
AC
OUT
120
VAC
AC NEUTRAL
OUT
AC GROUND