Magnum Energy Magnum Panel (MP Series) User Manual

Page 68

Page 61

3.0 Installation

3.13 Functional Test

After all electrical connections from the MP enclosure to the inverter, batteries, AC source, and
the electrical panel have been completed, follow the steps below to test the installation of the MP
enclosure and to verify proper operation of the AC breakers.

WARNING: During this functional test, the front cover is removed and exposes
personnel to potential dangerous voltages and shock hazards inside the MP enclosure
that may cause damage, injury, or death. If you do not have experience working with
AC and DC voltage circuits, do not attempt this test – use an experienced electrical
installer.

CAUTION: During this functional test, if any step cannot be verifi ed or is incorrect,
stop and recheck/correct the connections before proceeding to the next step.

1. Turn OFF all breakers (i.e., DC Disconnect, INV BYP, AC OUT, and INV IN) in the MP enclosure.

2. Perform DC voltage/polarity checks (refer to Figure 3-34 for single enclosures or Figure 3-35
for dual enclosures):

a. Use a DC voltmeter or multimeter (set to DC Volts) and place the negative (-) meter probe

(usually black) on the negative battery busbar (bottom of the DC shunt). Then place the positive
(+) meter probe (usually red) at the bottom of each DC breaker. Verify the battery voltage is
correct for your particular inverter model (i.e., 24-volt battery bank for a 24-volt inverter).

b. Ensure the voltmeter reading is a positive number. When the probes are connected correctly

(positive probe on DC circuit breaker and negative probe on battery negative busbar) and the
number is positive, the polarity of the battery voltage is correct.

If the battery voltage and polarity are correct, apply battery power to the inverter by turning the
inverter DC disconnect breaker(s) to the ON (up) position.

Multimeter

(DC Volts)

Figure 3-34, DC Voltage Checks -

Single Enclosures

MPDH-30D

(DC Side)

Multimeter

(DC Volts)

Figure 3-35, DC Voltage Checks -

Dual Enclosures (DC Side)