Transformers

Variac Auto Transformer

Overview

Variac Auto Transformer

Variac or variable auto transformer manufactured by spim wave is available with AC control voltage controls that offer continuous AC voltage supply. Variac ensures a distortion free output that is suitable for sensitive electronic appliances and equipments in residential areas and industries. Manufactured with cutting-edge technology, these auto transformers ensure a consistent linear regulation of AC voltage to provide high output and negligible waveform distortion.
It is suitable way of controlling current, light, heat and motor speed with a voltage factor. This transformer finds its wide applications in Auditorium, hotels, conference hall, laboratories, College & universities, Welding equipments, Servo stabilizer, rectifiers, battery charger and Testing instruments.

Construction

There is a single layer winding on toroidal core of high-grade cold rolled grain oriented (CRGO) steel.
A special durable contact surface is made on one side of the copper winding and a specially finished carbon brush slide smoothly on the surface.
As the control knob is rotated, the carbon brush slides over the winding.
A contact arm with a carbon brush is fitted on the centre shaft .

Features

Can enhance the output voltage in excess of twice the input voltage
Any desired voltage within the maximum range can be obtained by adjusting the carbon brush
Calibrated dial show approximately output voltage at no load
High quality carbon brush
The contact arm can be moved both manually and by motor
Delivers an output voltage from 0 to above line voltage
Constructed with 99.9% pure copper
High grade CRGO steel is used for constructing coils
Low temperature rise
Wide assortment of current rating 2 Amp. To 250 Amp