SINGLE PHASE FLUSH TYPE MODELS
	115V 60Hz 230V 50Hz Dimensions (in mm) Model Current Model Current A B E H Ø 5F-1A 5A 2F-1 2A 110 92 15 95 7 10F-1A 10A 4F-1 4A 175 146 25 102 10 15F-1A 15A 8F-1 8A 175 146 25 130 10 18F-1A 18A 10F-1 10A 180 155 25 135 10 30F-1A 30A 15F-1 15A 225 176 25 135 11 40F-1A 40A 20F-1 20A 240 205 25 135 11 50F-1A 50A 28F-1 28A 300 238 60 145 13

ENCAPSULATED AUTO-TRANSFORMERS
	Model Output 0-270V A B C  D   E  F 2N-1A 1A 90 105 105 6 24 11 4N-1A 2A 113.5 126 114 6 25 15 6N-1A 3A 113.5 126 124 6 25 15 10N-1A 5A 165 185 120 8 30 22.5 20N-1A 10A 164 185 143 8 30 22.5

A range of high quality compact encapsulated anti-wound variable trasformers designed for panel mounting applications where moisture-proof precision measurement instrumentation is involved. Encapsulation provides additional insulation due to epoxy casting of the transformer windings which also enhances safety of the equiptment.

THREE PHASE OPEN TYPE MODELS
	115V 60Hz 230V 50Hz Dimensions in mm Model Current Model Current A B E H 5F-3A 5A 2F-3 2A 110 92 15 95 4F-3A 10A 4F-3 4A 175 146 25 102 8F-3A 15A 8F-3 8A 175 146 25 130 15F-3A 30A 15F-3 15A 225 176 25 135 20F-3A 40A 20F-3 20A 240 205 25 135 28F-3A 50A 28F-3 28A 300 238 60 145

THREE PHASE MODELS

Ganged Assembly of three torroidal coils provide the Three Phase Models and a common coaxial shaft helps to provide continuous control of three phase output.

REMOTE CONTROL MODELS

VATs are also available with a stepper Motor bi-directional drive to enable remote control of the output voltage with ‘raise’ or ‘lower’ push button switches.

115V AND 230V MODELS

VATs are available for 115V or 230V operation at any line frequency between 47Hz and 63Hz.

RATING AND SPECIFICATIONS

All Single Phase VATs are rated for 115V or 230V AC. 50/60Hz single phase supply. Three Phase Models are for 200V or 400V AC. 50/60Hz input and provide variable Three Phase 4 wire voltage output.

The output voltage can be varied smoothly over two ranges : (i) from zero to full supply voltage (line voltage connection) or (ii) from zero to approx. 15% high than the supply voltage (Booster Voltage Connector).

As the output voltage is continuously variable, VATs cannot be rated in terms of KVA but are rated in terms of current that can be drawn from the output. The rating assigned to a VAT generally indicates the max. output current that can be drawn at any voltage, over the entire range. VATs can also be supplied for non-standard input.

CONSTRUCTION

Single Phase VATs are generally supplied in two types of construction, one is a portable type with sheet metal enclosure. For mounting them flush or back of panel, or inside a cubicle, they are supplied without any enclosure.

MAINTENANCE

When operated within its rated capacity, VATs has long life. For protection, it is advised to use a fast acting fuse at the output and a slow acting fuse at the input.