Magnum Energy MS-PAE Series Owner's Manual download pdf (Page 45)

Page 39

5.3 Parallel System Connections and Components

The basic installation procedure of the parallel system is similar to that of single inverter system.

However, the AC and DC connections and components required in the parallel system must be

considered.

5.3.1 AC and DC connections simpliﬁ ed using Magnum Panels

The AC and DC connections in the parallel system depend upon other components (noted in

the two section below in bold), but are simpli¿ ed when using the Magnum Panel (MP) Series of

enclosures. As shown in Figure 5-1, the AC Panel and DC Panel - which are part of the MP Series

enclosures - provide these separate components; and the speci¿ c AC or DC wiring to these

components are completed for you. Figures 5-2 and 5-3 are simpli¿ ed diagrams of the AC and DC

Panels showing the connections and components.

5.3.2 AC Connections Required in Parallel System

The AC input supply to the parallel system must be a 120/240 VAC split-phase system that pro-

vides two line conductors (referred to as L1 and L2), a neutral, and ground. Each MS-PAE inverter

requires a double-pole circuit breaker rated for a maximum 30A each pole. Typically the AC supply

originates in a main distribution panel, providing the separate AC Breakers required for the AC

input of each MS-PAE inverter. This main panel also has to provide the AC Buss-Bars to allow

connection of the neutral and ground conductors to each inverter input.

The AC output side of the parallel system requires an electrical panel, referred to as the inverter

panel, that combines all the inverter outputs and be equipped with a large double-pole circuit

breaker rated for the total output current of the parallel system. This inverter panel must provide

the AC Buss-Bars for the neutral and ground conductors from each inverter output.

If the inverter system requires isolation from the AC source for servicing without losing power to

the AC loads, an AC Bypass should be installed between the AC input and output connections.

5.3.3 DC Connections Required in Parallel System

When inverters are stacked they must operate from a common battery bank. In other words,

the DC negative of one inverter must be common with the second inverter and likewise for the

DC positive. Each inverter must be wired to the single battery bank separately and have a DC

Breaker in the positive side, matched to the cable size.

All DC negatives are required to be combined on a DC Buss-Bar and if the system requires battery

bank monitoring, a full system DC Shunt will need to be installed in the DC negative side.

BYPASS

OFF ON

INVERTER

BUSS-BAR

MP SERIES

(AC PANEL)

MS-PAE INVERTERS

(1 - 4)

INOUT

AC LOADS

(Customer

Connection)

AC SOURCE

(Customer

Connection)

BUSS-BARS

AC BREAKERS

(1 – 4)

MAS SL1 SL2 SL3

Figure 5-2, Simpliﬁ ed Magnum Panel

(AC Panel)

Figure 5-3, Simpliﬁ ed Magnum Panel

(DC Panel)

BREAKERS

DC BREAKERS

(1 – 4)

MAS SL1 SL2 SL3

OPTION

MP SERIES

(DC PANEL)

MS-PAE INVERTERS

(1 - 4)

POSNEG

SHUNT

BUSS-BARS

DC LOADS

(Customer

Connection)

DC SOURCE

(Customer Connection)

NEG POS

Parallel Operation

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Magnum Energy MS-PAE Series Owner's Manual Page 45

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