General; Functional Principle; Other System Requirements; Device Concept - Fronius String Control 250/25 Operating Instructions Manual

General

Device Con-
cept
Fronius String Control 250/25 (open)
Status messages can be sent via e-mail or SMS when using the "Fronius
Solar.access" software together with the "Fronius Datalogger."
This allows a defective solar module to be detected quickly.
Functional -
Principle
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Other System
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Requirements
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Each set of 5 incoming solar module strings is grouped into one
measuring channel.
5 measuring channels record the total current of the respective con-
nected solar module strings over the entire charging day.
In the evening, the Fronius String Control 250/25 calculates an ave-
rage value for all measuring channels.
The Fronius String Control 250/25 compares the current of each
measuring channel with the average value of all measuring channels.
If the Fronius String Control 250/25 detects that one of the measuring
channels deviates too much from the average, a status message is
sent to the Fronius Datalogger.
The permitted deviation from the average is freely definable.
Fronius Datalogger
PC with Fronius Solar.access software installed
The Fronius String Control 250/25
is designed for use in grid-con-
nected photovoltaic systems with
several solar module strings.
Up to 25 solar module strings can
be integrated at the input of the
Fronius String Control 250/25 to
reduce these at the output to one
DC+ and DC- main line.
The Fronius String Control 250/25
monitors the incoming solar module
strings to detect errors in the solar
module field.
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