Standby Mode; Figure 3-2, Power Flow - Standby Mode (Grid Input); Figure 3-3, Power Flow - Standby Mode (Gen Input) - Magnum Energy MagnaSine Hybrid Owner's Manual

3.2

Standby Mode

The MSH-RE Series features an internal battery charger and an automatic transfer relay when
operating in Standby mode. The Standby mode begins whenever AC power (utility grid 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 a power failure. Refer to Figures 3-2 (GRID) and 3-3 (GEN)
to see the fl ow of power from the AC input to the DC and AC output while in Standby mode.
GRID
120
IN
VAC
DC
OUT
Figure 3-2, Power Flow – Standby Mode (GRID Input)
120
VAC
DC
OUT
Figure 3-3, Power Flow – Standby Mode (GEN Input)
© 2013 Magnum Energy, Inc.
GRID IN (AC1)
CB1
(60A)
AC1 Hot
Transfer Relay
GEN IN (AC2)
CB2
(60A)
AC2 Hot
Transfer Relay
NEUTRAL IN
AC GROUNDS
DC NEGATIVE
DC
DC POSITIVE
FET Bridge
GRID IN (AC1)
CB1
(60A)
AC1 Hot
Transfer Relay
GEN IN (AC2)
CB2
(60A)
GEN
IN
AC2 Hot
Transfer Relay
NEUTRAL IN
AC GROUNDS
DC NEGATIVE
DC
DC POSITIVE
FET Bridge
CB3
(60A)
AC
Output
Relay
AC
Power Transformer
CB3
(60A)
AC
Output
Relay
AC
Power Transformer
Operation
HOT OUT
GRID
120
OUT
VAC
NEUTRAL OUT
HOT OUT
GEN
120
OUT
VAC
NEUTRAL OUT
Page 31