Linear Variable Differential Transformer
12,979 - 45,689 Per Piece
1 Piece (MOQ)
Single Phase Variac Transformer
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1 Piece (MOQ)
Best Deals from Variable Transformers
Variable Voltage Auto Transformer
100,000 - 500,000 Per Piece
1 Set (MOQ)
variac transformer
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We have carved a niche as one of the dominant Variac Variable Transformers Exporters from India. VARIAC Auto Transformers 1 Ph. (Closed / Open type) are designed to give output voltage of 260-270 Volts for the input voltage of 240 Volts. 3 Phase VARIAC Auto Transformers are designed to give output voltage of 470 Volts for input 415 Volts. These are available in manual and motorized operating type. Variac Auto Transformers are continuously variable voltage auto transformer, having a movable carbon tip, fixed to a brush-arm sliding on a silver plated commutator. Rotation of the brush-arm by either manual or motor drive, delivers-an output voltage from zero to or above line voltage. Variac conforms to I. S. 5142 of 1969. SALIENT FEATURES: RUGGED CONSTRUCTION: Variac transformer is designed for heavy duty trouble-free operation. All components are designed to give maximum life to the unit under extreme operating conditions. Except, for carbon tips, no other part needs any specific maintenance. Even carbon tips do not require to be changed frequently. This practically makes the VARIAC maintenance free electrical equipment. EXCELLENT REGULATION: The drop in voltage from "no load to full load" is minimal in Variac Auto-transformers. HIGH EFFICIENCY: Careful copper, core selection and design assure the user of low watt loss, as compared to other types of controllers. NO WAVE FORM DISTORTION: VARIAC provides an output voltage wave-form, which is a faithful and distortion less replica of the input voltage wave-form. SILVER PLATED COMMUTATOR: A special silver plating technique is used on the commutator enabling it to withstand high overloads and maintain constant contact drop. It also ensures smooth operation, long life and increased resistance to corrosion. LOW OPERATING TORQUE: A glass smooth commutator, special sintered bushings for the shaft and perfect assembling of the coils, results in low operating torque for all Variac Auto-transformers. SMOOTH AND LINEAR OUTPUT: As voltage between turns is small and as the brush-arm is in constant contact with more than one turn, harmful sparking is avoided and output voltage can be set very easily to a fraction of a volt from zero onwards by rotation of the knob. LOW MAGNETIZING CURRENT: By using an adequate section of high quality grain oriented silicon steel, the iron losses in Variac, are controlled to the minimum, The no-load current in all Variac transformers, is invariably less than 5% of the rated current. NEGLIGIBLE MAINTENANCE AND TROUBLE-FREE LONG LIFE: Variac has been carefully designed. No special care has to be taken to maintain Variac Auto-transformers in-normal- working environments. The only components needing inspection and maintenance are the carbon tips and the commutator. Timely replacement of carbon tips and cleaning of the commutator surface of foreign particles and accumulated dust, will ensure a considerably long, maintenance-free, and uninterrupted life to the unit. Normally Variac Auto-transformers upto 28 Amps. are offered in air-cooled or oil cooled construction and models of 40 Amps. and above, are offered in oil-cooled construction in very special cases, Variacs of 40 Amps. & above can be offered in air-cooled construction. This is possible due to the new paralleling techniques adopted by us.
1 Phase Variable Auto Transformer
2,280 Per Piece
1 Piece (MOQ)
Motorized Variacs Transformer
8,500 Per Piece
1 Piece (MOQ)
Varivolt Transformer
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1 Piece (MOQ)
“VARIVOLT“ is the most effective device meant for operation from a nominal input voltage of 240V 1Ph & can give output voltage anywhere between 0 to 240V or 0 to 270V 1Ph by simple transformer action. Three such “VARIVOLT“ connected electrically in star and mechanically in tandem, become suitable for operation from a nominal input voltage of 415V 3Ph and can give output anywhere between 0 to 415V or 0 to 470V 3Ph. “VARIVOLT” AUTO TRANSFORMER is a continuously variable voltage auto transformer, having a movable carbon tip, fixed to brush arm sliding on a silver plated commutator. Rotation of the brush arm by either manual or motor drive, delivers an output voltage from zero to or above line voltage. “VARIVOLT” conforms to I.S. 5142. Salient Features: Rugged Construction : “VARIVOLT” Auto transformers are designed for heavy duty trouble free operation. All components are designed to give maximum life to the unit under extreme operating conditions. Except for carbon tips, no other part needs any specific maintenance . Even carbon tips do not require to be changed frequently. This practically makes the “VARIVOLT” a maintenance free electrical equipment. Excellent Regulation : The drop in voltage from “no load to full load” is minimal in “VARIVOLT” Auto-transformers. (See fig…II for regulation characteristics) High Efficiency : Careful copper, core selection and design assures the user of low watt loss, as compared to other controllers. No Wave form Distortion : “VARIVOLT” provides an output voltage wave-form, which is a distortionless replica of the input voltage wave-form. Silver Plated Commutator : A special silver plating technique is used on the commutator, enabling it to withstand high overloads and maintain constant contact drop. It also ensures smooth operation, long life and increased resistance to corrosion. Over-load Capacity : Because of its careful designing, “VARIVOLT” can withstand many over-loads, Fig…I gives an idea of the maximum overloading allowed with its relevant time limits. When repeated overloading takes place, care has to be exercised to provide sufficient off time to reduce the temperature build up. Low Operating Torque : A glass smooth commutator, special sintered bushings for the shaft and perfect assembling of coils results in low operating torque for all “VARIVOLT” Auto-transformers. Smooth and Linear Output : As voltage between turns is small and as the brush arm is in constant contact with more than one turn, harmful sparking is avoided and output voltage can be set to a fraction of a volt from zero onwards. Low Magnetizing Current : By using an adequate section of high quality grain oriented silicon steel, the iron losses in “VARIVOLT”, are controlled to the minimum. The no load current in all “VARIVOLT” transformers, is invariably less than 3% of the rated current. Negligible Maintenance and Trouble Free Long Life : “VARIVOLT” has been carefully designed. No special care has to be taken to maintain “VARIVOLT” auto transformers in normal working environments. The only components needing inspection and maintenance are the carbon tips and the commutator. Timely replacement of carbon tips and cleaning off foreign particles and accumulated dust, from the commutators surface, will ensure a considerably long, maintenance free, and uninterrupted life to the unit. Normally “VARIVOLT” auto transformers up to 28 Amps. are offered in air cooled or oil cooled construction. Models of 40 Amps. & above are offered in oil cooled construction. In very special cases “VARIVOLT”, above 40 Amps, can be offered in air cooled construction. This is possible due to the special paralleling techniques adopted by us. Auto Transformers – Our Speciality : “VARIVOLT” is now available in high current ranges from 225 Amps. up to 2000 Amps. in single, two and three phase models. Special paralleling techniques designed by us, have made it possible to surpass the previous current limit of 200 Amps. for toroidal Auto Transformers. The following are the salient features of High Current “VARIVOLT” Auto Transformers :- Special forced current paralleling techniques, result in current sharing of each coil ±2%. Flanged type pressed steel radiators, are supplied separately packed, making the units easy for transportation. Gear Driven High Torque A.C. Synchronous Motor drive. Terminals in the form of bus-bars. All other features of oil cooled auto transformers.
Variable Transformer
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Auto Variable Transformers
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STERCO product line includes variable transformers, the most versatile and reliable voltage controls available, Variable transformers have many industrial and laboratory applications as basic components to control voltage, current, power, heat, speed, light, and electromechanical force. A basic Variable Transformer consists of a single layer, magnet wire winding on a toroidal core of laminated silicon steel. A carbon brush, connected to an output lead, is rotated over a precision ground, plated commutator track 10 tap off voltage at any turn from zero to the maximum output voltage of the winding. EFFICIENCY & DISTORTION LESS VOLTAGE CONTROLIn contrast to inefficient, wattage-burning resistive-type controllers such as rheostats, Stereo Variable Transformers have an extremely low power loss and efficiencies as high as 98%. Stereo Variable Transformers deliver any desired voltage (within the transformer rating) with negligible variation in output voltage from no-load to full-load current. It produce an accurate transfer of input wave to output circuit, providing distortion less voltage control (a requisite of many sophisticated electronic applications).PLATED COMMUTATOR SURFACEThe commutator surface of each coil is specially plated with precious metal, giving Stereo commutators longer life, increased resistance to corrosion and the capacity to withstand greater overloads (while maintaining a constant contact voltage drop).LONGER LIFE WITH NEGLIGIBLE MAINTENANCEPrecise design assembly of the brush provides excellent mechanical performance, long life, and low-driving torque. Brush replacement is seldom needed and it can be easily replaced, if required. Due to high safety margins of voltage, current-carrying capacity and dielectric strength, longer life of the unit can be expected.RUGGED MECHANICAL CONSTRUCTIONSterco Variable Transformers are precision built to exacting mechanical tolerances using the finest materials available. Quality assurance inspections are performed to insure that the high designed in quality is maintained throughout the manufacturing cycle. A Stereo Variable Transformer provides accurate, reliable and lasting voltage control for a broad variety of applications.
variac transformer
1,000 - 3,000 Per Piece
1 Piece (MOQ)
Dimmerstat/ Variac / Continuously Variable Voltage Auto Transformer
1,000 - 3,000,000 Per Nos
1 Piece(s) (MOQ)
Dimmerstat is registered trademark of AE for continuously variable voltage auto-transformer. It is the most effective device for step less, break less & continuous control of AC voltage & therefore for various parameters, dependent on AC voltage.The basic Dimmerstat is meant for operation from a nominal input voltage of 240V AC & can give output voltage anywhere between 0 to 240V or 0 to 270VAC by simple transformer action. Three such Dimmerstat connected electrically in star and mechanically in tandem, become suitable for operation from a nominal input voltage of 415V 3Ph AC and can give output anywhere between 0 to 415V or 0 to 470V.Resin moulded Dimmerstat is basically a variable Voltage Auto-Transformer which is partly or fully Moulded in Reinforced Polyester Resin. This has adjustable spindles which allow easy assembling of flush, table or Motorized Type in single or three phase models. These models are designed up to 120% continuous load.Features Simple, rugged construction. Coils made from high grade CRGO Silicon Steel & 99.9% pure Electrolytic copper. Output voltage variation is smooth, continuous, break less & linearly proportional to angular rotation. High efficiency. Negligible waveform & power factor distortion. Excellent short time overloads capacity. Remote operation possible by motorization. Wide range of current ratings. High quality carbon brush used for current collection.
variac transformer
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We offer highly durable range of variac variable transformers, which are highly demanded in the market for their chief characteristic features like high level of accuracy and outstanding performance. Our variac transformer is widely used in number of industries for diverse purposes. Our variac transformers are at par with the international quality norms. These can be obtained at quite reasonable prices.
variac transformer
3,500 Per Piece
1 Piece (MOQ)
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Variable Auto Transformers
14,000 Per Piece
5 Piece (MOQ)
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Variable Auto Transformer
350,000 Per Piece
1 Piece (MOQ)
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Single Phase Variac Transformer
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Linear Variable Differential Transformer
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1 Piece(s) (MOQ)
We offer Linear Variable Differential Transformer useful for control labs. The present experimental unit comprises of a LVDT in a transparent box with lead screw based slow motion displacement, a mm scale for displacement measurement, and main unit consisting of excitation signal source, balanced demodulator, a 3½ digit DVM and necessary power supplies. The signals are provided to the LVDT box through a cable from the main unit. >>Highlights Large size LVDT for classroom experiment Transparent casing for proper viewing AC and DC output Slow motion displacement >>Experiments Variation of modulated output with displacement Input-Output characteristics Determination of linear range and transducer gain >>Features and Specifications LVDT Range: ±50mm or total 100mm Sensitivity: 25mV/cm Operating frequency: 5KHz±5% Displacement measurement on a mm scale with fine motion control Carrier source (internal): 5KHz±5%; 1.5V (nominal) Built-in 3½ digit DVM for output reading IC based balanced demodulator circuit IC controlled internal power supplies Essential accessory – a CRO The experiment is complete in all respect, except a CRO.
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Variable Auto Transformer
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The variable autotransformer that we offer to our clients are manufactured under the constant surveillance of our team of experts using technologically advanced methodologies. Our team of engineers designs this power transformer as per the specifications provided by the clients. These transformers are capable of accepting energy at a particular voltage and then transferring it at other voltage. This further allows the usage of the equipment at a safe voltage.
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Variable AC Transformer
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We are widely acclaimed for offering a durable range of Variable AC Transformer, commonly known as Variacs. Our Variable AC Transformer is used to provide a voltage-adjustable source of AC electricity. The core of the Variable AC Transformer is made of high grade, non aging continuous CRGO strip and carefully annealed that results in low magnetizing current and core losses. The output is linear and Variable AC Transformer does not produce any distortion in the wave form. We have designed Variable AC Transformer to withstand heavy overloads of short durations such as starting currents of motors. We are proficient in offering Variable AC Transformer as per the details given by the clients. Highlights Continuous, Step less and Break less voltage variation Negligible waveform & Power factor distortion Short time overload capacity Remote operation possible Specifications Load Capacities 28 Amps to 600 Amps in Single and 28 Amps to 1000 Amps in Three . (28 Amps, 40 Amps, 60 Amps, 100 Amps, 200 Amps, 400 Amps, 600 Amps, 800 Amps, 1000 Amps) Phase: Single and Three Toroidal Coils with CRGO Steel sheet Core. Frequency: 50/60 Hz. Voltage Variation capability: 0 - 270 V A.C in Single and 0 -470 in Three *. Cooling Method AN for 28 Amps in Single and Three Oil cooled for 40 Amps to 600 Amps in Single * Oil cooled for 40 Amps to 1000 Amps in Three * Drive Mechanism Hand Driven with Knob. Motor Operated with Step - Syn Motor. Remote Motor Operated with Step - Syn Motor. Compliance to test standards IS 5142. Oil Conforming to IS 335. Copper Conductor compliant to IS 13730 - 34. Basic features and Enclosures Open Type for Panel Mounting. Portable Type for Table Mounting. M.S Tank with Oil Immersed and Pressed steel radiators. Double varnished Toroidal Coils. Voltage indicator dial. Knob or Wheel for Voltage Variation Connector plate or Bus bars in cable box. High quality carbon brushes. Optional Features Voltmeter & Ammeter for indication Indicator lamps Push buttons for motor operated dimmer-Other specific customer requirement. Note: We manufactures these transformers as per our customers requirement.
Linear Variable Differential Transformer
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Our lvdts are the most economically priced displacement transducers. Housed in stainless steel body, these lvdts are a combination of ruggedness and high performance. These are available in both acdc type lvdts. Available in stroke lengths upto 300 mm, with freespring return core, withwithout ip67 protection, etc applications of lvdts include measurement of displacement and linear position, deflectiondeformation in automated material testing machines, triaxial and consolidation testing machines for soil testing, spring testing machines and automation of textile machinery.
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