Magnum Energy Magnum Panel (MP Series) - Manual (Page 16)

© 2011 Magnum Energy, Inc. Page 9
2.0 Introduction
2.4 MP Internal Components
Additional components are located inside the MP enclosure. The components found inside the
MPSL-30D (see Figure 2-7), the MPSL-60S (see Figure 2-8), the MPSH-30D (see Figure 2-9), and
the MPDH-30D (see Figures 2-10a and 2-10b) are listed alphabetically and described below:
Info: All the busbars have dual hole sizes — the larger holes accept #14 to #1/0
AWG and the smaller holes accept #14 to #6 AWG — these holes have set-screw type
compression terminals (no ring lugs required). The number of terminals available
depends on the particular busbar and the MP model.
Info: All AC Ground Busbars, DC Ground Busbars, and the DC Ground Stud are electrically
common to each other as they are all connected to the MP chassis.
AC GROUND Busbar(s) - These busbars are connected to the MP enclosure chassis and are
used to connect the incoming and outgoing AC circuit grounds to a common ground point.
AC LEG 1 IN Busbar - Connects incoming LEG 1 AC power from the grid or a generator to the
MP/inverter system. This busbar is used to connect the LEG 1 output of a 120/240V AC external
source (grid power or AC generator) to the MP enclosure. The AC LEG 1 IN busbar is connected to
the HOT 1 input of the inverter system (thru the inverter’s AC input breaker). The external source
is used by the inverter to charge the batteries and power downstream loads thru the inverter.
AC LEG 1 OUT Busbar - Supplies the LEG 1 power from the MP/inverter system to the AC loads.
This busbar is the connection point from the MP enclosure to the LEG 1 terminal in the electrical
panel powered by the inverter.
AC LEG 2 IN Busbar - Connects incoming LEG 2 AC power from the grid or a generator to the
MP/inverter system. This busbar is used to connect the LEG 2 output of a 120/240V AC external
source (AC generator or grid power) to the MP enclosure. The AC LEG 2 IN busbar is connected to
the HOT 2 input of the inverter system (thru the inverter’s AC input breaker). This external source
is used by the inverter to charge the batteries and power downstream loads thru the inverter.
AC LEG 2 OUT Busbar - Supplies the LEG 2 power from the MP/inverter system to the AC loads.
This busbar is the connection point from the MP enclosure to the LEG 2 terminal in the electrical
panel powered by the inverter.
AC NEUTRAL Busbars - The neutral leg for loads powered from the MP/inverter system and the
neutral leg for AC power supplied to the MP/inverter system by either a generator or grid. These
two busbars are the connection points for the AC neutrals in the system. The system neutrals
include: the neutral output from the external AC source (generator/grid), the neutral terminal in
the electrical panel that is powered by the inverter, and the input and output neutral terminals of
each inverter. Note: Both AC NEUTRAL busbars are electrically connected to each other.
• Installing MS-PAE Series inverters: Both neutral terminals are common with each other
within the MS-PAE Series, this means only one neutral from each MS-PAE inverter needs to
connect to the AC NEUTRAL busbar.
• Installing MS4024 inverters: The Neutral In and Neutral Out are not common with each
other within the MS4024; this means both input and output neutrals from each MS4024
inverter needs to connect to the AC NEUTRAL busbar.
AC NEUTRAL-GROUND Connection - A wire (green) connects the AC neutral to the system
ground. This green wire can be removed from the GROUND busbar if the primary AC neutral to
ground connection is made elsewhere in the system (see Section 3.10).
Battery Negative Connection - The bottom of the DC Shunt busbar is the connection point to
the negative terminal of the battery bank. This busbar is supplied with a 3/8-16 bolt and lock
washer to allow the battery cable to be connected.