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Distribution Transformer
2 Products availableVoltage Stabilizer
1 Products availableBrushes
1 Products availableWe are leaders in the market for providing best range of Single Layer Roller Contact Vertical Variautos, High Current Air Cooled (Three Phase ) Variable Autotransformer, Single Layer Variautos, Toroidal Transformer and Double Wound Isolated Variable Transformer
This Variauto construction looks like a conventional 3 ph transformer as can be seen in the picture. The spatiality of this lies in winding Cu strip of appropriate cross section edgewise. This reduces the length of the column to 1/4 as compared to winding widthwise thus making it compact. This column is then polished & roller carbons are made to make contact with winding for current collection. Due to circular column construction, a Double Carbon assembly can be provided giving two outputs 1800 out of phase (or as it is known + and - type).
Then this type of variauto can give +/- type output with carbon assembly moving in opposite directions (up/down). For large current ratings these columns can be paralleled. Also being in three phase construction it can be used for higher Currents in delta (p) type connections.This finds application mainly in Plating rectifiers, high voltage Testing Equipments, high power automatic voltage regulation (Servo Stabilisers)
We specialize in manufacturing High Current Air Cooled Variauto in Single Phase & Three Phase 100A, 200A, 400A. The picture shows single phase Variautos 200A each. Three Phase units are built by using such three stacks & motorizing them on common shaft. This is a substitute for Oil cooled units which are less preferred in many non hazardous application for safety reasons. They are very easy to maintain & service. Enclosed units can be manufacture as shown ( 200A, 440V ). These variautos are more preferred for safety reasons over Oil Cooled variautos.
The Variautos offered by Radio Electric is a simple & rugged method to control power, voltage & current. They are designed for heavy duty continuous use. They can provide high current rating, & overload capacity. Radio Electric specilises in design tailor made variautos.They are commonly known as Variac Auto Transformer.
This is a motorized version of Single Layer Variauto. We manufacture it using top quality motors, Micro Switches and rugged construction. The side studs and center shaft are well insulated from each other to avoid completion of magnetic circuit. Models available are 2 Amp, 4 Amp, 6 Amp, .upto 35 Amp. For Models above 40 Amp, we use side wiping contacts. The commutatorsurface on these coils are machine processed and hence are very even and smooth. This ensures very less torque for the motor enhancing its life.
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Windmill / Solar & Energy Saver Application
These transformers are silent in operation, compact in size, less weight and are ideally suitable 24/7/365 operation due to very low no load losses.
| Isolated (OW) type Capacity 50VA to 12 KVAThree Phase AssemblyHigh Efficiency | Energy Saver Transformers Auto Type Capacity upto 30 KVAThree Phase AssemblyEfficiency of 99% is possible in Energy Saver Application |
| Torroidal Transformers are gaining more and more acceptance due to its unique features and advantages. In fact, because of its low weight & height it is being increasingly preferred over theconventional E&I transformers. In certain applications, its low magnetic stray field & the low mechanical hum are the most advantageous features. The low no load losses of the Torroidal Transformer are of great value in 24 hours stand by equipment. This transformer being custom built proves very economical in large production batches. Dual out-put voltages can be provided if desired. It is also possible to have primary suitable for 115Vor 230V AC, 50Hz. A Thermal cut off can be incorporated as a special feature at an extra cost.Our manufacturing experience of number of years has given us extensive knowledge & insight in designing the Torrodial Transformer. We use high quality material inputs in order to maintain the quality.The INSULATION between the primary & secondary winding is a fundamental safety feature, and to ensure this we use only, BIS (Bureau of Indian Standards) approved insulating material. Special attention is given to insulation resistance, Hi-pot test & creepage distances. | |
| Engineers, Scientists, Technicians working in laboratories on sensitive equipments have a need for Isolated mains supply, with a variable output Voltage. This facilitates them in testing various devices demanding different voltages & currents. It is also an Electrical Engg. practice to test devices by applying steadily increasing voltage from 0 V to the device rated voltage. To achieve the above objective, it is normal practice to use a Variauto followed by a 1: 1 Isolation transformer or vice versa as shown in figure 1. This combination becomes very bulky (heavy) with two separate transformers, wiring or a combined bulky box. occupying much of test test bench space. This is more so as the current rating or VA increasing. It looses its mobility. Radio Electric has solved this problem by designing a "Double Wound Isolated Variable Transformer". This elegant & compact arrangement uses only ONE Transformer on a Single torroidal Core. This provides 2.5 kv Isolation between prim & sec, prim & body with a Variable Output Voltage from 0V to the required voltage. Various models are as Illustrated in table 1.This concept can also be used very effectively in DC power supplies with Variable output (eg. Input 230V / 110 V, Output 0 to 25 V, 5A or 0 to 15V, 8 Amp. etc.). We also manufacture in table-top models with various types of input/output sockets (Shuko / Dual type / Round type, etc.) as required. | |||||||
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Girgaon, Mumbai, Maharashtra 