Operation and installation manual
Page 79 of 96
(PVI-STRINGCOMB (-S, -MC, -S-MC) - Rev:1.0)
Check that the operation has been carried out correctly and then press
[OK]: if there are any errors, press [OK] and then repeat the operation.
Press the button
to close the window and return to the StringComb Monitor
screen.
EXAMPLE:
10 strings are used. Index of imbalance set at 10%. Average minimum current for
imbalance 2A. All weights are at 1.
CASE 1: 9 strings are issuing 1.5A except one which is issuing 0A. The
average current is 1.35A. No anomaly signal is triggered off.
CASE 2: 8 strings are issuing 5A, one 4.5A and one 2.5A. The average
current is 4.7A. The limits within which imbalance is not detected are
4.23A – 5.17A. No anomaly signal is triggered off on the string with 4.5A
and on the strings with 5A. A current imbalance signal will be generated
on the string with 2.5A.
12.8.2 Configuration
String Current Settings
DO NOT CONFIGURE THESE SETTINGS BEFORE READING THIS
PARAGRAPH.
Before calibrating the current weights, it is absolutely essential for the
system planner to check that the current of each string complies with the
nominal values of the current of the solar panels used.
An example is given below (valid for light and temperature conditions which are
the same as the nominal conditions indicated in the data sheet of the panels
used):
