Precise, continuous voltage control 60 Hz and 50/60 Hz Models showing Extended Frequency Usage Characteristics Bench-Top and Panel-Mount Models Motorized Models can be factory ordered 120 Volt and 240 Volt Models Three-Phase Models can be Special Ordered Autotransformer design gives voltage boost Now Available !  400 Hz Variacs ... See 'em Here Smaller ! Lighter ! for Aircraft & Shipboard Applications
Typical Bench Top Model 120 Volt Models <> 240 Volt Models Some Models in Rectangular Boxes		Panel Mount Model VTP-600 120 Volt Models 240 Volt Models

Variable Transformers, generically referred to as "Variacs", are widely used when adjustable voltages are required for quality control testing, electronic equipment burn-in, life-tests, low voltage performance evaluation, D.C. rectifier/regulator analysis or other industrial and engineering applications. Although generally used for 50 or 60 Hz applications, many situations arise where dual-usage to 400 Hz and beyond is required from the standard 50/60 Hz variable transformer. Information provided in the tables below will assist in determining suitability of a particular model for higher frequency applications

Check out our Variac / Variable Transformer Application Notes

Bench Top units, employing a AC power line cord and electrical outlet, can be conveniently moved within the engineering laboratory or equipment service area to provide adjustable voltage. Bench Top models are normally shipped with Plug / Socket configuration as shown in the Tables.  Should special socket configurations or switched Input / Output be required CONTACT us for feasibility evaluation and quote

Panel mount units are often incorporated into test equipment or permanent installation

Multiple frequency Test and Laboratory units have been constructed.  CONTACT us with you requirements

Bench Top Variacs are widely used in Service Shops, Industrial & Academic Laboratories, Engineering Design Facilities, Manufacturing Operations and Field Installation.  Portability makes these units valuable where actual operational parameters need to be ascertained. NOTE: This is a list of Extended Frequency Capable Bench Top Variable Transformers.

Click for Complete List of available Bench Top Units

Bench Top Models - - 50/60 Hertz Design Operation <> Extended Frequency Operation Data
STEEL CASE, CORD / PLUG, OUTLET RECEPTACLE; SEE TABLE FOR PLUG / SOCKET
<> CONTACT factory for Special Plug / Socket

ESP Bench Top Model	Voltage Input	Voltage Output	Amps Output @	Amps Output @	Amps Output @	Amps Output @	Weight lbs / kg	Price US $
120 V Bench Top Models			50 / 60 Hz	400 Hz	1.500 Hz	2,000 Hz
VTB-700 NEMA 5-15 PLUG / SOCKET	120	0 - 140	5	5	5	5	8 / 3.7	334
VTB-1250 NEMA 5-15 PLUG / SOCKET	120	0 - 140	10	10	9	9	10 / 4.6	354
VTB-2100 NEMA 5-15 PLUG / SOCKET	120	0 - 140	15	12.5	5	5	20 / 9.2	657
VTB-6000 TERMINAL BLOCKS	120	0 - 140	50	22.5	Do Not Use	Do Not Use		2,032
VTB-7500 TERMINAL BLOCKS	120	0 - 140	60	25	Do Not Use	Do Not Use		2,130

Home Page ... http://www.elect-spec.com
e-mail: esp@elect-spec.com <> FAX 1-508-653-0268 <> Phone 1-508-655-1532 <> Toll Free (U.S.)1-800-225-4876
© 1996 - 2003 Electronic Specialists, Inc.,  All Rights Reserved   
variac_400xref60.pdf  ..............   Page 2 of 9

Home Page ... http://www.elect-spec.com
e-mail: esp@elect-spec.com <> FAX 1-508-653-0268 <> Phone 1-508-655-1532 <> Toll Free (U.S.)1-800-225-4876
© 1996 - 2003 Electronic Specialists, Inc.,  All Rights Reserved  ........  variac_400xref60.pdf ...........  Page 3 of 9

Protection Doesn't Cost ... It Pays ! . . . Ancient Proverb
Since 1972

Bench Top Models - - 60 Hertz MINIMUM Operation <> Extended Frequency Operation Data

STEEL CASE, CORD / PLUG, OUTLET RECEPTACLE
- - - 120 VOLT MODELS - - NEMA 5-15 PLUG & SOCKET
- - - 240 VOLT MODELS - - CONSULT TABLE FOR PLUG / SOCKET

 <> CONTACT factory if Special Plug & / or Socket desired

Panel Mount Variacs are utilized in permanent installations and equipment when operational or performance points need to be varied.  Panel Mount variacs are mounted both on external panels for operational accessibility and internally for system setup adjustments. 
NOTE: This is only a list of Extended Frequency Panel Mount Variable Transformers. 
Click for Complete List of available Panel Mount Units
Panel Mount Models - - 50/60 Hertz nominal; Extended Frequency operation capability  For hardwired, permanent installation

Protection Doesn't Cost ... It Pays ! . . . Ancient Proverb
Since 1972

Panel Mount Models - - 50/60 Hertz nominal; Extended Frequency operation capability 
For hardwired, permanent installation

Panel Mount Models -60 Hertz MINIMUM Operation <> Extended Frequency Operation Data <> For hardwired, permanent installation

Check Out Electronic Specialists Variac controlled voltage regulator and isolation transformer
Have a look at our Precision, Variac Voltage Regulator  packages
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Variac / Variable Transformer Tutorial
View our 400 Hz Variac units