3phs Control Transformers

• In an auto transformer the primary and secondary of the winding is linked together both electrically and magnetically thus reducing the cost over conventional transformer
• Unlike Isolation transformer which has two electrically isolated windings called Primary and Secondary an Auto transformer has only one single voltage winding which is common in both sides
• Then the auto transformer has common magnetic core but has only one winding which is common to both primary and secondary circuits
• The main advantage of this type of transformer design is that it can be made a lot cheaper than Isolation transformer for the same KVA rating but the biggest disadvantage of this transformer is that it does not have primary and secondary isolation and have a common neutral
• An auto transformer is used mainly for the adjustments of line voltages to change its value
• They are more efficient than the isolation transformer for the same KVA rating and are smaller in size as they require less copper in their construction and their loss is less compared to double wound transformer of the same KVA rating

Applications

• Used as a starter to give up 50-60% of full voltage to the stator of squirrel cage induction motor during starting
• It can be used as a small boost to a distribution cable to correct the voltage drop
• Can be used as a voltage regulator
• Electrical apparatus testing labs
• For interconnecting system that are operating at threshold voltage.

Technical Specification

Phase	3 Phase
Cooling Type	Air Cooled		Oil Cooled
Winding Metal	Copper		Aluminium
Application	CNC	Drive	Panel Boards	Textile Mills
Power	Any Range 0.5 Kva - 650 Kva
Voltage	3 Phase 415v Primary		Secondary - 200v | 220v | 110v | As Per Customer Requirement
Phase	3 Phase
Cooling Type	Air Cooled		Oil Cooled
Winding Metal	Copper		Aluminium
Application	CNC	Drive	Panel Boards	Textile Mills
Power	Any Range 0.5 Kva - 650 Kva
Voltage	3 Phase 415v Primary		Secondary - 200v | 220v | 110v | As Per Customer Requirement