Variac Variable Transformers
 

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Staco VARIAC Variable Transformer 100 and 200 Series

These manually operated panel mounted Variacs are available in single and three phase models from 0.8 to 3.0 amperes. The 171, 201, 221-B and 291 units operate from 120 volt input, while the 252 unit operates from a 240 volt input. STACO’s coil tapping arrangement permits an output voltage from 0 to line voltage in either the clockwise or counterclockwise direction and from 0 to 10% above line voltage in the clockwise direction. Two and three ganged, manually operated units are available for increased single phase voltage ratings and for three phase applications.

Goto Selector for other sizes

100-200 Series Variable Transformer

3 Ganged variable Transformer

1 & 3 Ganged 100-200 Series Variac

Staco 100, 200 Series Wiring

Staco 100, 200 Series Variac

 

100/200 Series Variac Drawings 

Portable Series Variac Drawings

IMPORTANT NOTES About VARIAC Current Ratings

** All 100/200 Series Variable transformers can operate to 2000 Hz without derating the specifications shown below.

Single Phase 120V Input

Part Number Input Volts PH HZ ** Output Volts

Constant Current/ Constant Impedance* Rating

 Features  
171 120 1 50 / 60 0-120 1.75A/ 2.2A*  
60 0-132 1.75A
201 120 1 50 / 60 0-120 2.0A/ 2.5A*  
60 0-132 2.0A
221B 120 1 50 / 60 0-120 2.5A/ 3.2A*  
60 0-132 2.5A
3PN221-B 120 1 60 0-132 2.5A Case, Cord, Plug, Switch, Light, Fuse, Receptacle
291 120 1 50 / 60 0-120 3.0A/ 3.5A*  
60 0-132 3.0A

Single Phase 240V Input

Part Number Input Volts PH HZ ** Output Volts

Constant Current/ Constant Impedance* Rating

Features  
252 240 1 50 / 60 0-240 0.8A/ 1A*  
0-264 0.8A
171-2 240 1 50 / 60 0-240 1.75A/ 2.2A* 2-Ganged Unit
60 0-264 1.75A
201-2 240 1 50 / 60 0-240 2A/ 2.5A* 2-Ganged Unit
60 0-264 2A
221B-2 240 1 50 / 60 0-240 2.50A 2-Ganged Unit
60 0-264 2.5A
291-2 240 1 50 / 60 0-240 3.0A/ 3.5A* 2-Ganged Unit
60 0-264 3.0A

Single Phase 480V Input

Part Number Input Volts PH HZ ** Output Volts

Constant Current/ Constant Impedance* Rating

 Features  
252-2 480 1 50 / 60 0-480 0.8A/ 1.0A* 2-Ganged Unit
0-528 0.8A

Three Phase 240V Input

Part Number Input Volts PH HZ ** Output Volts

Constant Current/ Constant Impedance* Rating

 Features  
171-3 240 3 60 0-240 1.75A/ 2.2A* 3-Ganged Unit
201-3 240 3 60 0-240 2A/ 2.5A* 3-Ganged Unit
221B-3 240 3 60 0-240 2.5A/ 3.2A* 3-Ganged Unit
291-3 240 3 50 / 60 0-240 3.0A/ 3.5A* 3-Ganged Unit

Three Phase 480V Input

Part Number Input Volts PH HZ * Output Volts

Constant Current/ Constant Impedance* Rating

 Features  
252-3 480 3 50 / 60 0-480 0.8A/ 1A* 3-Ganged Unit
60 0-528 0.8A

100/200 Series Variac Drawings  
Portable Series Variac Drawings

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