String Control - Fronius IG-TL 3.0 Operating Instructions Manual

String Control

For monitoring incoming solar modules strings
Functional principle:
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Setting range
IMPORTANTThe time must be set correctly in order for the solar module string monitoring
function to work properly.
Status
An actual value display of the average solar module string current from measuring channel
1, measuring channel 2, and their present deviation.
Config. Channel ONE
Used to set the number of solar module
strings connected to measuring channel 1
(MC1); Measuring channel 1 = DC- termi-
nals 1 - 3
Config. Channel TWO
Used to set the number of solar module
strings connected to measuring channel 2
(MC2); Measuring channel 2 = DC- termi-
nals 4 - 6
Unit
Setting range
Factory setting
The incoming solar module strings are combined at 2 measuring channels.
The 2 measuring channels record the total current of the respective connected solar
module strings over the entire charging day.
The average solar module string current is used for an effective comparison of the two
measuring channel values.
The average solar module string current is calculated from the channel measurement
value divided by the number of solar module strings connected per channel.
The difference of the two average values is calculated and displayed as a % with the
smaller average value being deducted from the larger average value.
A warning is shown on the display when
a) The difference of the two average values is larger than the defined maximum
deviation
and
b) The threshold value defined for the average solar module string current of a
measuring channel is exceeded.
Display: Status / Config. Channel ONE / Config. Channel TWO
/ max. Deviation / Threshold
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0 - 99; 0 = No measuring channel monitoring
0
MC1 MC2
DC-
DC+
1 2 3 4 5 6
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