Linz electric SL Série Mode D'emploi Et D'entretien page 18

Stability control
The stability control acts on the dynamic response of the
system thus ensuring that the creation of oscillations in
the outlet voltage value is avoided. The regulator is preset
by Linz Electric in order to obtain the best performance
in the vast majority of applications.
In the event of a special application, the regulator may
be set by acting on the ST trimmer; the response time is
increased with a clockwise rotation.
Protection against low speed operation
The protection against low frequency operation is preset
by Linz Electric so that the outlet voltage is decreased
when the frequency falls below 47Hz.
By acting on Hz trimmer with a clockwise rotation it is
possible to decrease the frequency of the operating
threshold.
If the regulator is set for operation at 60Hz (terminals 6
and 7 of the HVR-11 regulator) the operating frequency
of the protection is 57Hz.
Overload protection
The overload protection protects the alternator against
overload conditions and high inductive loads.
The protection limits the voltage of the exciter stator to
the set value.
This value is set by Linz Electric and may be increased with
a clockwise rotation of the OL trimmer.
Operation test of the disassembled regulator
To verify the correct operation of the regulator proceed
as follows:
a) Make the connection as indicated in the diagram of
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figure 3.
b) Apply an alternating voltage of 220Vac - 50Hz; the
light bulb should not switch on.
c) Act on the VG trimmer with a slow clockwise rotation;
the light-bulb will switch on progressively.
d) When the maximum brillancy is reached the light- bulb
will switch off completely for a few seconds and then
switch on again.
If the conditions described above are satisfied, then the
regulator works properly.
Fig. 3