Single Layer Variacs, Double Layer Variacs, Isolated Double Wound Variable Transformer, Torroidal Transformer, Custom Made Variacs, Roller Contact Vertical Variacs, Double Layer Roller Contact Vertical Variacs, Mumbai, India

 
 
PRODUCTS
 

Oil Cooed Variauto

 
Oil Cooed Variauto Oil Cooed Variauto

We specialize in the manufacture of high current rated coils. The commutator surface of our coils is machine processed and hence very uniform and smooth. This is very important for proper collection of current by the carbon brushes thus reducing the heat generated. Our standard coils are 100 Amp, 150 Amp, 200 Amp. Using these coils we manufacture oil-cooled variautos from 100 Amp 3 Ph to 1200 Amp 3 Ph capacity (415 V input and 0-470 V variable output). In high current rated models we use multiple coils with properly rated balancing coils to achieve the rated current. Based on the calculations of cooling area appropriate no. of radiators &fins  are used. These variautos are generally motorized with geared mechanism. We also cater to tailor-made requirements.

  Toroidal Transformer

 
Torroidal Transformer

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 KVA
• Three Phase Assembly
• High Efficiency
Energy Saver Transformers Auto Type

• Capacity upto 30 KVA
• Three Phase Assembly
• Efficiency 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.
 

 

 

 

  Double Wound Isolated Variable Transformer

 
Double Wound Isolated Variable Transformer

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.
 

MODELS

 

Radiotone  DW  Isolated  Variable Transformer

I/P 125 V, 60 Hz supply voltage & output Variable from 0 to 150 V

 

Model

Max. Power (Amp/Watts)

Radiotone DWIsoVariac 1.5 A

1.5 Amp/225 W

Radiotone DWIsoVariac 3.0 A

3.0 Amp/450 W

Radiotone DWIsoVariac 6.0

6.0 Amp/900 W

Radiotone DWIsoVariac 12

12.0 Amp/1800 W

Radiotone DWIsoVariac 20

20.0 Amp/3000 W

Radiotone DWIsoVariac30

30.0 Amp/4500 W

 
I/P 230 V, 50 Hz Output   0-260V
 
Model

Max. Power (Amp/Watts)

Radiotone DWIsoVariac

2.0 Amp

Radiotone DWIsoVariac

4.0 Amp

Radiotone DWIsoVariac

8.0 Amp

Radiotone DWIsoVariac

15.0 Amp

Radiotone DWIsoVariac

20.0 Amp

 

 
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