Magnum Energy Series Stacking Cable Kit (ME-SSI) - Manual (Page 14)

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2010 Magnum Energy, Inc.
each line and neutral is 120VAC. When three-phase power is
connected to the HOT 1 IN of each inverter (one line to one
inverter and a different line to the other inverter) and passing
through the inverter (Charge mode), the incoming power is
shared with the charger. The voltage between each HOT 1 OUT
and neutral will be 120VAC, and between the inverters two
HOT 1 OUT lines it will be 208VAC. If this AC source is used,
you must remember that you may not be able to power any
240VAC loads (voltage from L1 to L2 will be 208VAC) until the
AC is disconnected and the inverters again start inverting.
240VAC only – The input of the series stacked system re-
quires either 120VAC (from hot to neutral) or 120/240VAC
(with a common center “neutral” provided between the L1 and
L2 lines). If a 240VAC only AC source is connected to the AC
HOT input on the two inverters without a center neutral, the
inverters will not recognize the AC source nor allow charging.
If this AC source is required, an auto-transformer may be used
to obtain a center neutral to allow charging/pass-through.
WARNING: The output of the series stacked inverters is
120/240VAC when inverting; however, while in Charge
mode (AC is connected and charging/pass-thru), the AC
output voltage is determined by the input AC voltage. Be
aware that this voltage may be different from the inverting
voltage and the connected load may not work or could be
possibly damaged.
AC Input – Each inverter requires a two-conductor (hot and
neutral) plus ground cable, with the hot conductor fed by a cir-
cuit breaker. If you decide to use the Single In/Single Out (30A)
connection (see Figures 7 and 8), each inverter would require
a 120VAC hot conductor (protected by a maximum 30A circuit
breaker) connected to the HOT 1 IN terminal. The neutral conduc-
tor, which must be sized to handle the total current capacity of the
HOT 1 IN conductor, must be connected to the NEUT IN terminal
and a ground conductor connected to the AC ground terminal on
each inverter.
For a Single In/Single Out (60A) connection (see Figures 9 and
10), each inverter would require a 120VAC hot conductor (protect-
ed by a maximum 60A circuit breaker) connected to the HOT 1 IN
terminal and this connection jumpered to the HOT 2 IN terminal.
The neutral conductor (which must be sized to handle the total
current capacity of the HOT 1 IN conductor) must be connected to
the NEUT IN terminal, and a ground conductor must be connected
to the AC ground terminal on each inverter.
In most applications, these input conductors originate from an AC
distribution panel, providing a main disconnect and circuit break-
ers required for each conductor connected to the HOT 1 IN input
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9
Installation