Green Dot : Variable Transformer innovation
The use of Inbuilt Micro Controller Based Metering has greatly helped to convert Full Lab into one Portable Instrument incorporating Voltage, Current, Watts, Power Factor & Frequency on a back lit 4 line LCD Display here are some more details.
Innovation of a Variable Transformer to Electrical Industry is like a Wheel to the Automobile Industry. More & more versatility has been introduced to extend its use & convenience. The use of Inbuilt Micro Controller Based Metering has greatly helped to convert Full Lab into one Portable Instrument incorporating Voltage, Current, Watts, Power Factor & Frequency on a back lit 4 line LCD Display here are some more details.
A Variable transformer in a general form – is a Toroidally wound transformer – which is mounted flat on a plate & at right angle to the plate – a shaft moves carrying a Carbon Brush – Spring loaded wipes around the Flat surface made bare free from FACE INSULATION. Since the brush spans more than one turn, the change in voltage is practically continuous.
The brush is so designed that excessive heating can not occur in the turns that it spans. The Varying Output Voltage collected from Brush Arm is DISTORTION LESS & exact replica of Input Wave form This – thus provides a honest varying output voltage that is essential required for all purpose testing. It is produced in varying current capacities upto 2000 Amps.
Other advantages of this device are Control of A.C. voltage in testing and development work. / Over voltage and under voltage tests. / Voltage control of aging racks for lamps, vacuum tubes, dry disk rectifiers, etc. / Voltage control in power supplies -as for Servo-type, Automatic Voltage Stabilizers, constant current supplies etc. / Voltage control for meter calibration, phase-angle control in the calibration of wattmeters and power-factor meters. / Motor speed control. / Control of electric heaters and ovens in laboratory, pilot plant, and production line. / Lighting control in theater, auditoriums, photographic studio and dark rooms. / Testing of Fans, Motors, Tubes, Bulbs, Pumps etc. / Source of Controlled Input Voltage for testing & Calibration of all electrical equipment. Etc etc.
