Over-Current And Under-Voltage Shutdown; General; Functional Principle; Safety - Fronius String Control 250/25 DCD DF Instructions De Service

Over-current and under-voltage shutdown

General

The Fronius String Control 250/25 has a shutdown function that interrupts
the energy supply in the Solar Net:
-
-
Functional The over-current and under-voltage shutdown function does not depend
principle on the direction of the current flow.
If the String Control 250/25 measures a current flow > 3 A or a voltage < 7
V while supplying Solar Net components, the energy supply in the Solar
Net is interrupted.
The energy supply can be restored automatically or manually.

Safety

Restoring the
energy supply
automatically
The jumper (1) must be set to position A for automatic restoration of the
energy supply.
in the event of over-current, e.g., in case of a short circuit
in the event of under-voltage
WARNING! An electrical shock can be fatal. Danger from DC
voltage from solar modules.
- Make sure that the input and output sides in front of the
device are not charged before making any connections or
settings.
- Any and all connections and settings should only be carried
out by qualified electricians.
- Follow the safety rules in these operating instructions.
(2)
Jumper positions:
(1)
A Automatic restoration of the
energy supply
(factory setting)
M Manual restoration of the ener-
gy supply
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