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TECHNICAL DESCRIPTION
After over twenty years’ experience in the alternators field,
BELTRAME c.s.e. has produced a new kind of AVR
called S125, which ensures the highest degree of performance
for brush-less and old fashioned generators,
suitable for any use condition.
The S125 AVR is the result of the most sophisticated
technology offered by electronics. It makes possible the
feeding of stator exciting units at values of nominal
voltage up to 100 Volts, and it can therefore be used on
most machines available on the market.
It guarantees the optimum performance of alternators, be
they charged, uncharged or in transition phase, in particular
during the breakaway of asynchronous motors.
This device also ensures safe protection against persistent
over voltage and over load perturbation.
All the components are resin-finished in order to warrant
long lasting reliability in any environment and avoid
damages caused by vibrations. The S 125 is cased in a
strong plastic box.
It is furthermore supplied with insulated electric clamps
connection and internal fuse block, complete with an highspeed
fuse as protection against short circuits.
Characteristics:
- Nominal input voltage 180/260 V. 300/490 - 50/60 Hz.
- Precision: in steady condition ± 1% (regulation on each
phase).
- Nominal continuous current 5 A.
- Nominal output voltage <100 Vdc.
- Operative temperature range -20 ÷ +65 °C.
Complete with:
- Voltage adjustment trimmer.
- Stability control trimmer.
- Under frequency protection trimmer.
- Protection against maximum excitation in under
frequency condition (between 40÷50 or 50÷60 HZ), when
diesel or hydroelectric plants are set to self heating from
the start.
- Over voltage protection (internally calibrated).
- Self-excitation at minimum 2 Volts.
- Jumper for 470Ù -1 (±5%) Watt remote control
potentiometer.
- 50/60 Hz jumper.
- Dimensions: 100 mm W, 55 mm H, 58 mm D; weight
g 280.
- The S125 is equipped with an auxiliary input connection
to ensure an high short circuit current. To make this function
operational, remove jump AB (see operating diagram).
PERFORMANCE
The new S125 AVR is suitable for every type of alternator,
and it ensures an high current (5 A) in a very low dimension.
It is complete with over-voltage protection (displayed
from a yellow led), and under frequency protection
(displayed from a red led). During the first step the voltage
increases proportionally with the frequency, to get the
under frequency set normal ( the starting point of the lowturns
protection trimmer is 20% less of frequency normal
value, and this function can be jumped between 50/60
and Hz); from this point on, also the voltage goes immediately
to the nominal value.
Starting from 2V minimum self excitation, voltage
approaches the nominal value only when the frequency
THE FACTORY CAN MAKE MODIFICATIONS AND IMPROVEMENTS WITHOUT ANY PRIOR NOTIFICATION
REPRESENTATION
VOLTAGE REGULATOR
TYPE S125
Nominal 100÷490 V
tension 50/60 Hz
Excitation { Ie = 5 A
Ve < 100 V
{
If different voltage or frequency is needed , BELTRAME
c.s.e can supply the regulator according to the
feeding value desired by the customer.
REGISTERED MODEL
Sistema Qualità Certificato
BELTRAME CSE, TEL. 049/5965127 - FAX 049/9440024 - MAIL TO: info@beltramecse.com
made in Italy