Eliwell RGF 312 - CUT-OFF Regulation

RGF 300
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4.3 CUT-OFF regulation (P6 trimmer) - PHASE 1
fig. 31
P6
C
UT
-
OFF
m = 0%
M = 90%
Adjusts the minimum voltage being supplied to the fan during automatic operation:
the fan will not be supplied with voltage lower than the predetermined value; this avoids the supply
of minimum voltage which would not be sufficient to provide a starting torque for the fan rotation.
In order to adjust the
'CUT-OFF'
correctly, proceed as follows:
1)
turn the
P5
trimmer (manual speed control) starting from position ’
m
’ until the desired minimum
rotation voltage is obtained;
2)
turn the
P6
trimmer starting from position ‘
m
’ until the
P6
value overlaps the
P5
value;
fix the
P6
trimmer position exactly and check the state of the
RL1 ON
Led which must move from the
'off' position to the 'on' position (only if
J14 = ON3
);
3)
bring the
P5
trimmer to minimum value ‘
m’
: the load will now be supplied starting from the minimum
voltage selected.
Mm
0% 20%
Mm
cc
CUT-OFF
settin
g
400
Vac
P4
P6 20%
%C
SP
P6 0%