SMA SUNNY BOY 2500, Руководство по установке

Страница: 26 / 46

Installation SMA Technologie AG
Page 26 SB2500-11:SE2006 Installation Guide
PV string (DC) connection
To connect up the input, follow these steps:
1. Check that the PV generator connectors have
the right polarity and do not exceed the
maximum string voltage of 400 V (DC). See also
section 4.2 "PV generator requirements"
(page 15).
Caution! Dangerous high voltages may be present. Danger of
death!
2. Taking one DC plug connector at a time,
measure the direct current voltage between one
DC plug connector of a string and earth
potential.
3. If the measured voltages are constant and if
their total is roughly the same as the open circuit
voltage of the string then there is a ground
contact in this string. Its approximate location
can be deduced from the relationships between
the voltages.
Do not connect strings to the Sunny Boy 2500 that contain a
ground contact until you have fixed the ground contact in the PV
generator.
4. Repeat points 2 and 3 for each string.
5. Connect up the faultless PV generator strings to
the inverter.
6. Close off the unneeded DC input sockets using
the protective caps supplied in the accessories
kit.
PE
+ - + -
String 1
String 2
-
String 3
+