Sabtron Transformers & Electro Equipments Bangalore, Karnataka

Method of operations servo controlled voltage stabilizers maintain accurate output by feedback controllingm by servo motor. the input line is connected in series with the secondary winding of a buck boost transformer. The secondary will get additive or subtract voltage induced from its primary. When the input is low, the secondary will have additive voltage to give boosted output and vice versa. the primary of this buck – boost transformer is connected to the fixed tap and variable point of the variable transformer which is connected across the input supply. the position of the variable point with respect to the fixed tap point determines the amount of primary voltage and hence the secondary voltage of the transformer which becomes additive or subtract. Thus the input is boosted or bucked by the series connected secondary wiring corresponding to the position of the variable point of the variable transformer. the variable point is driven by a servo motor in the forward or reverse directions. the forward or reverse signals is given through a controller circuit which is energized by an output sensing transformer. the controller circuit will be giving forward or reverse signals to the motor till the ouiput is corrected to the required value. as sensed by the sensing transformer if the variation in the input voltage goes beyond the specified range. the brush arm of the variable transformer will be driven to either of the ends, thus unable to correct the output further. This however is likely to cause damage to the variacs, motor etc. To avoid the same limit switches are provided at both the ends of the variacs winding so that the brush arm on reaching the end will automatically cut off the supply to the motor and prevent further movement. if the variation in the input voltage revives to within the specified range, the supply to the motor comes into function automatically to set the output voltage to its specified level also when the limit

Technical specifications model no & make 5sitb-3, sabtron input voltage 0-415+- 5% output voltage 0-415 +- 5% rating 5 kva frequency 50 ± 3 hz. Thermal rating 6.95 amps @230 v continues line regulation better than +-5% load regulation better than 1% from no load to full load. Static regulation ±1%. Mode star or delta type of cooling air natural cooled operating temperature 0-40 degree c insulation level 1.5 kv rms for one minute transformer copper wound input termination banana terminals with 25%, 50%, 75% taping output termination banana terminals with 25%, 50%, 75% taping type power coated metal enclosure mounting bushing

Input: 230v+- 10%, 50hz, or 440v output type: variable single, dual, fixed, multi output output voltage: from 0 volt to different ranges output current : from 0 amps to different ranges cine regulation: better than 0.05% for the input variation +- 10% sabtron dc power supply is designed as a source for use in laboratories, industries and field testing with compact size, it provides dc output voltages for analog and digital testing.

We are offering variable transformer, our ranges of transformers are from 2 amps to 300 amps in single coil and above that with gang coil through the balancing coil. We make up to 60 amps both air-cooled and oil cooled models whereas above 60 amps in oil cooled models only. Moreover, as per client’s specifications, we also offer double layer winding capacity up to 5 kva especially for the manufactures of servo controlled stabilizers.

We are offering box type variable transformer , our ranges of transformers are from 2 amps to 300 amps in single coil and above that with gang coil through the balancing coil. We make up to 60 amps both air-cooled and oil cooled models whereas above 60 amps in oil cooled models only. Moreover, as per client̢۪s specifications, we also offer double layer winding capacity up to 5 kva especially for the manufactures of servo controlled stabilizers.

Technical Specifications Input voltage 0-100-230 V AC+- 5% Output voltage 0-100-230 V AC +- 5% Output current 1KVA (10 Amps), 500VA(5Amps) Frequency 50 ± 3 Hz. Thermal rating 10 Amps @100 V & 5Amps @ 100V continues Line Regulation Better than +-5% Load Regulation Better than 1% from no Load to full load. Static Regulation ±1%. Mode MCB, Fuse with indicator Type of cooling Air natural cooled Operating temperature 0-40 degree C Insulation level 1.5 kV rms for one minute Transformer Copper wound Input termination Mains cord Output termination Universal socket 2 nos Type Power coated metal enclosure Mounting Nylon bush