Magnum Energy Magnum Panel (MP Series) - Manual (Page 17)

Page 10 © 2011 Magnum Energy, Inc.
2.0 Introduction
Battery Positive Connection - The bottom of the inverter’s DC disconnect is the connection
point to the positive terminal of the battery bank. The DC disconnect provides a rear captive nut
to allow the battery cable to be front-connected using a 3/8-16 bolt and lock washer.
DC GROUND Busbar - This busbar is connected to the MP enclosure chassis and is used to tie
DC equipment grounds to a common point. This terminal is also used to connect the inverter/
MP/inverter system to the DC grounding electrode. If the DC grounding electrode conductor
is greater than #1/0 AWG, use the DC Ground Stud to connect to the DC grounding electrode
(i.e., ground rod).
DC Ground Stud - This 5/16-18 stud is connected to the MP enclosure chassis, and is provided
as a connection point to the DC grounding electrode when the conductor is larger than #1/0 AWG.
This stud also connects to the DC shunt through a busbar and serves as the DC negative to
ground connection point. If installing a PV-GFP device, this busbar must be removed (see Sec-
tion 3.11). Note: For ground wires #1/0 AWG or smaller, use the DC GROUND busbar.
DC NEGATIVE Busbar - This busbar is connected to the battery bank negative through the
load side of the DC shunt. This busbar is the battery negative connection point for additional
DC circuits, such as from the DC negative output of a charge controller or when combining the
negatives of DC load circuit breakers. This busbar is rated to handle 120 amps.
DC NEGATIVE-GROUND Connection - This busbar connects the DC negative to the system
ground. It must be removed if the primary DC negative to ground connection is made elsewhere
in the system (see Section 3.11).
DC POSITIVE Busbar - This busbar is connected to the battery bank positive through the
bottom of the inverter DC disconnect. This busbar is the battery positive common point for
connecting additional DC circuits, such as from the output of a charge controller disconnect, the
DC positive feed to DC load breakers, and the positive connection to a battery status monitor.
This busbar is rated to handle 120 amps.
DC Shunt - A DC shunt installed in the DC negative side that is used to measure the amper-
age fl owing between the battery and the inverter (and any DC loads connected). This shunt is
pre-installed so that a battery monitor may be easily connected to display the current fl ow. See
Section A-2 for information on installing and wiring the ME-BMK-NS battery monitor inside the
MP enclosure. The MPSL-30D and MPSL-60S are supplied with a 500 amp/50mV DC shunt, and
the MPSH-30D and MPDH-30D have a 1000A/100mV DC shunt.
DC Shunt Voltage Sense Terminals - These two shunt terminals/screws serve as the sense
connections to the optional ME-BMK-NS battery monitor. When current is passed through the
shunt, the IR drop (AKA voltage drop) developed across it can be read by the battery monitor
to provide an accurate indication of the current fl owing through the shunt.
DIN Rail Track - For installing up to 1/2” (12.7mm) wide, DIN rail-mounted, Q-Frame type,
DC breakers. These breakers can be used for connecting DC loads or installing a PV-GFP device.
The track may be removed to allow 1” (25.4mm) wide, back-mounted, E-Frame type breakers
to be installed instead.
Enclosure Joining Screw/Washer - A #10-32 x 3/8” (Pan head, T25 Torx drive) thread
cutting screw and #10 lock washers are provided to join the two enclosures of the MPDH-30D
together – to have them at the same electrical potential. See Figure 3-16c for more information.
INV HOT 1 OUT Busbar - This busbar is the connection point for the HOT 1 output from each
installed inverter. The total output power combined from every inverter on this busbar is fed thru
the Inverter Bypass Breaker Assembly to the AC LEG 1 OUT Busbar.
INV HOT 2 OUT Busbar - This busbar is the connection point for the HOT 2 output from each
installed inverter. The total output power combined from every inverter on this busbar is fed thru
the Inverter Bypass Breaker Assembly to the AC LEG 2 OUT Busbar.