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: [email protected] made in Italy

equals the trimmer set value (Hz), and then remains steady onto the nominal value. In this way, regulation is available as a compound with all advantages and precision of electronic regulators. Moreover this system allows to charge heavy loads on the main without hampering diesel engine efficiency, both on turbo compressed or old fashion, and hydroelectric stations. S125 has AB clamps (see picture) to let in auxiliary winding if alternator is arranged for it , and therefore the original regulator on the machine can be replaced leaving overall function of the alternator unchanged. INSTALLATION...