CPS SCA50KTL-DO/US-480, Installation And Operation Manual

Page: 48 / 145

42
3. Ensure correct polarity of the PV Strings before terminating
the DC source circuits. Referring to Figure 3-22 , the wiring
from the PV string pairs must be checked according to the
following steps:
A. Use a multi-meter
to measure the PV strings’ conductor
ends and check the polarity.
B. The positive (+) terminal of the conductor should match the
positive
(+) terminal of inverter’s DC input.
C. The negative (-) terminal of the conductor should match
the negative (-
) terminal of inverter’s DC input.
Figure 3-22 Polarity Check
NOTICE:
It is important to use a multi-meter to check the polarity of the DC
source circuit conductors to avoid any risk of reverse polarity.