___________________________________________________________________________________________
4
ADVR-250
SECTION 4 : U/F PROTECTION & LAM
FUNCTION SELECTION
The Under Frequency Protection (U/F) and LAM
function can be selected using the potentiometer.
4
3
2
1
SPECIAL
65Hz
57Hz
KNEE
KNEE
KNEE
5
6
7
8
9
0
0 1
2
3
4
5
6
7
8
9
60Hz
50Hz
Figure 3
ATTENTION
The potentiometer settings must correspond to
the rated frequency. An error in settings could
cause damage to the generator.
50 Hz Systems
0
：
Under Frequency knee point 48 Hz, LAM function
“OFF”. Use when transient loads are below 40% of
rated generator capacity.
1
：
Under Frequency knee point 48 Hz, LAM function
set to (13%), Use when transient loads are
between 40
– 70% of rated generator capacity.
2
：
Under Frequency knee point 48 Hz, LAM function
set to (25%). Use when transient loads are greater
than 70% of rated generator capacity.
60 Hz Systems
3
：
Under Frequency knee point 58 Hz, LAM function
“OFF”. Use when transient loads are below 40% of
rated generator capacity.
4
：
Under Frequency knee point 58 Hz, LAM function
set to (13%), Use when transient loads are
between 40
– 70% of rated generator capacity.
5
：
Under Frequency knee point 58 Hz, LAM function
set to (25%). Use when transient loads are greater
than 70% of rated generator capacity.
Special Systems
6
：
Under frequency knee point 57 Hz, LAM function
“OFF”. Under a load, engine speed variations can
be greater than 2 Hz.
7
：
Under frequency knee point 65 Hz, LAM function
“OFF”.
8
：
Factory setting of the Under Frequency knee point
is 48 Hz and LAM function
“OFF”. This option is
supplied for special projects, which must be
ordered separately and are set at the factory.
9
：
Under frequency knee point 47.5 Hz
，
LAM function
“OFF”. Under a load, engine speed variations can
be greater than 2 Hz.
