Xantrex Technology XMP 2600 - Manual (Page 70)

Basic operation Setting protection thresholds
Selecting the
protection
setting
method
The protection threshold values can be set using one of two methods:
Manual ............................the values for the protection thresholds are
programmed by the user.
Automatic (or tracking) ..the values for the protection thresholds are
automatically being set by the XMP each time
new output settings are being programmed.
To select the preferred protection setting method proceed as follows:
Select the power module to program (see: first operation steps chapter
for details).
Select the PROT parameter and enter programming mode (press the
SET key) or enter programming mode and then select the PROT
parameter (see: Programming power module parameters at the
beginning of this chapter).
If you have selected the PROT parameter in programming mode: press
the left selection key ( ← ) to move the cursor to the protection setting
method selection field.
If you have selected the PROT parameter in status mode, when you
enter programming mode the cursor position depends on the currently
selected method for setting the protection thresholds:
o If the current method is automatic (shown as “AUT”) – the cursor
is placed under the method selection.
o If the current method is manual (shown as “MAN”) – the cursor is
placed under the over voltage threshold entry field. In this case
you need to press ENTER twice to move the cursor to the method
selection field.
Use the up / down selection keys to select the desired protection setting
method.
How values
are set using
the automatic
method
When using the automatic method for setting protection threshold values, whenever
a new output setting value is programmed the XMP re-calculates the appropriate
protection threshold value.
The calculation is based on a percentage of the setting programmed value plus a
constant that depends on the power module’s rating. The addition of a constant
comes to solve situations where the calculated value is too close to the output setting
value and false protection events may occur. For example: if a module with output
rating of 60V is programmed to produce 1V a protection threshold of 1.1V is too
low.
The following table details the way a protection threshold value is calculated for the
different power module ratings:
Power module rating
Calculation of protection
threshold value
1.250 or 2.500 or 5.000 or 8.000
SET + 10% + 1
Limited to V/Imax + 10%
10.00 or 18.00 or 20.00 or 36.00 or 40.00 or 80.00
SET + 10% + 1.5
Limited to V/Imax + 10%
160.0
SET + 10% + 5
Limited to V/Imax + 10%
XMP 2600 User’s Guide rev. 1.0 51