|  ISEinc.com  |  Variac.com  |   Literature & Documentation  |

 Variac Selector

 Portable Variacs with Cord Plug Receptacle

 Portable Variacs with Digital Volt and/or Ammeters

 Single Phase Variacs, 120VAC Input; 0-140VAC Output

 Single Phase Variacs, 120VAC Input; 0-280VAC Output

 Single Phase Variacs, 240VAC Input; 0-280VAC Output

 Single Phase Variacs, 240VAC Input; 0-560VAC Output

 Single Phase Variacs, 480VAC Input; 0-560VAC Output

 Three Phase Variacs, 240VAC Input; 0-280VAC Output

 Three Phase Variacs, 240VAC Input; 0-560VAC Output

 Three Phase Variacs, 480VAC Input; 0-560VAC Output

 Home

 Product List

 Temperature & Process Controls

 Digital Panel Meters

 Pressure Transducers & Indicators

 Timers & Counters

 Data Loggers

 Recorders

 Variac Variable Transformers

 SCR Power Controls

 Voltage Regulators & UPS Systems

 Thermocouples

 

 Literature List

Technical Data & Calculators

Staco Variable Transformers

Return to Transformer Selector

(Click on P/N for more detailed specifications)

240V Three Phase Wye Input with up to 280V Outputs

Click on this link to request further variable transformer information

Important Notes:

CURRENT RATING TERMINOLOGY: To permit maximum utilization of STACO Variable Transformers, output ratings are given for both constant current and constant impedance loads. All current ratings are based on continuous use at ambient temperatures to 122 F (50 C).  Use derating curve for higher ambients.  Short duration overloads to 10 times transformer rating are possible.  See graph for acceptable limits.

CONSTANT CURRENT RATING: Output current that can be carried regardless of output voltage setting. (Reduce, for output above 125% of input voltage, on voltage doubler connection. See Graph)

CONSTANT IMPEDANCE RATING: Output current that can be carried with loads such as incandescent lamps or resistance heaters in which the current drawn is approximately proportional to the applied voltage, increasing to maximum current at line voltage. This rating applies only to applications where maximum output voltage is limited to line voltage.

THREE PHASE CONNECTED TRANSFORMERS: If ganged units are used in a system that ordinarily has a common neutral or ground between source and load, the neutral or ground must be connected to the common terminals of the variable transformer assembly. If the system has no neutral, the load must be balanced or the transformers will be damaged.

OPERATION AT HIGHER FREQUENCIES: All Staco variable transformers are designed for operation at 60 or 50/60 Hz.  Most models can also properly operate with input frequencies to 2000 Hz.  Some models output ratings must be derated at higher frequencies. See derating table for details.

	ISE, Inc. 10100 Royalton Rd.,  Cleveland, OH  44133  USA Phone: (440) 237-3200  Fax: (440) 237-1744
	Email ISE Cleveland
	Toledo Area Office
	417 Tomahawk Drive,  Maumee, Oh 43537 Phone: 419-893-3330 - FAX: 419-893-2151
ISE, Inc. Privacy Policy

Copyright © 2011 ISE, Inc.  All rights reserved.