Xantrex Technology XMP 2600 - Manual (Page 73)

Operating the power module relays Basic operation
The foldback selection symbol represents the selected current limiting scheme as
summarized in the following table:
Foldback
symbol
Meaning of symbol
No foldback … the power module’s output changes from a
voltage source to a current source depending on the
connected load (constant voltage or constant current).
Linear foldback ... when current limit is reached, the power
module’s output voltage decreases (down to 0) as does
the output current (down to 30% of the current SET
value).
Non-linear foldback … when current limit is reached, the power
module’s output voltage decreases (down to 70% of
the voltage SET value) while the output current stays
constant. Beyond that point, the output current
decreases as well (down to 30% of the current SET
value).
Retry …… when current limit is reached, the Power Module shuts-
down it’s output for a period of 3 seconds. Then, the output
is restored for 1 second and if the current limit is still valid
the cycle repeats itself. Up to 5 retries are performed until
the Power Module declares an error condition and its output
stays shut.
Shutdown … when current limit is reached the power module
shuts down and a fault is generated.
How to select
To select the desired current limiting scheme, proceed as follows:
Select the power module to program (see: first operation steps chapter
for details).
Select the OUT, LOAD or SET parameter (use the up / down selection
keys) and enter programming mode (press the SET key) or enter
programming mode and then select the SET parameter (see:
Programming power module parameters at the beginning of this
chapter).
Skip over the voltage and current entry fields by pressing ENTER,
twice.
Use the UP / DOWN selection keys to select the desired current
limiting scheme symbol (see above).
Proceed to program other power module parameters or exit
programming mode by pressing the SET key.
Operating the power module relays
Each XMP power module has two output control relays: output disconnect and
output polarity (these relays may, optionally, be omitted by the manufacturer at the
user’s request).
54 XMP 2600 User’s Guide rev. 1.0