Staco Energy Products' full range of variable transformers offer the
exceptional versatility and reliability required for so many of today's
voltage control applications in both industrial and laboratory environments.
Unlike a standard fixed ratio transformer, a Staco variable transformer
is designed to provide variable output voltage that can be adjusted
from 0 to 117% of the unit's input voltage.
Staco Energy
Products Co. offers a wide range of standard models including
the following: |
- Panel mount, single phase (fixed
and adjustable shaft)
- Enclosed cord and plug
- Metered
- Fully enclosed
- Ganged
|
- Isolated
- Isolated portable cord and plug models
- "Quick-Step" motorized
- Motor driven
- Cased
|
A basic Staco variable transformer consists of a copper winding on a toroidal
core of laminated, grain-oriented, silicon steel. A carbon brush, connected
to an output terminal, is rotated over the length of a precision-ground,
precious metal-plated, commutator track to tap off voltage at any turn
from zero volts to the maximum output voltage of the winding.
Quick Links
Plug and Cord Models
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Panel Mount, Single Phase Variable Transformers
 |
100
and 200 Series |
Panel
mount, single phase, fixed shaft.
120 or 240 volt.
0.08 to 3.0 max amps constant current load. |
Engineering
Drawing |
Brochure |
 |
500
Series |
Panel
mount, single phase, fixed shaft.
120 or 240 volts. 5.0 max amps constant current load. |
Engineering
Drawing |
Brochure |
 |
1000
and 1200 Series |
Panel
mount, single phase, adjustable shaft, 120 or 240 volt,
3.5 - 10.0 max amps constant current load. |
Engineering
Drawing |
1000
Series Brochure
1200
Series
Brochure |
 |
1500
Series |
Panel
mount, single phase, adjustable shaft, 120 or 240 volt,
9.5 - 15.0 max amps constant current load. |
Engineering
Drawing |
Brochure |
 |
2500
Series |
Panel
mount, single phase, adjustable shaft. 120 or 240 volt,
10.0 - 25.0 max amps constant current load. |
Engineering
Drawing |
Brochure |
 |
5000
Series |
Panel
mount, single phase, adjustable shaft. 120 or 240
volt, 10.0 - 28.0 max amps constant current load. |
Engineering
Drawing |
Brochure |
 |
6000
Series |
Panel
mount, single phase, adjustable shaft. 120 or 240
volt, 35.0 - 60.0 max amps constant current load. |
Engineering
Drawing |
Brochure |
TOP
Isolated Series
 |
Isolated
Series |
Bench
or panel mount, 120 or 240 volt, 2.0 - 25.0 max amps constant
current load.
Wiring avail. for Isolated, non-isolated & voltage doubler. |
Engineering
Drawing |
Brochure |
 |
Isolated
Series |
Cord
and plug model with isolated transformer. 120 volts,
2.0 or 4.0 amp output current. |
Engineering
Drawing |
Brochure |
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Ganged Variable Transformer Assemblies
High Current Models
By ganging variable transformers
with a common rotor shaft wiring the outputs in parallel, the output
current can be greatly increased. The models listed here are capable
of output currents up to 315 amps. Other models are available
in a variety of ranges.
To download a PDF version
of our brochure, click
here. For more information, contact your local sales representative
or call us directly.
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Three Phase Models
All
of Staco Energy Products' variable transformers can be ganged with
a common rotor shaft and wired for three phase operation, in either
open Delta or Wye configuration. For more information, contact
your local sales representative, or call the factory directly.
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Accessories and Other Configurations of Standard
Models
Cased Models
Transformers of the 1010B through
6011 series are available in either "C" style (featuring protective
screening over the coil assembly only) or the "CT" style (which
also includes a terminal box cover with knockouts to accept conduit. Example
part numbers are "1510C, 2510CT."
Engineering Drawings
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Motor-Driven Models
For
applications requiring remote or automatic voltage control, a driving
motor can be added to all models of the 501C through 6011 series. Standard
motor speeds are: 5, 15, 30 and 60 seconds of travel, and so are designated by
the prefix "M." For example: "30M1510."
Engineering Drawings
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Controllers
MP Microprocessor Controller
Our MP series of Microprocessor
provides for easy interface of computer and process controller to
Staco Energy Products' motor driven variable transformers. It is capable
of several operational modes with selectable control ranges - tunable
for various motor speeds, output voltage ramping, and feed back voltage. Custom
options are available.
The microprocessor can be controlled with the microterminal, process
control set point, or a bi-directional communications port such as
RS-232 or RS-422.
The variable transformer regulation is maintained at +/-0.5 volts. The
MP controller is available with one, two or three channels for control
of up to three motorized variable transformers or individual phase
control of a three phase unit.
More
Information about the MP Controller (.pdf)
Engineering Drawings
for MP Controller
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FRC-20 Controller
The FRC-20 controller is
designed to position and regulate any Staco motor driven variable
transformer. It
can be controlled with a 0-5 VDC or 4-20 Ma set point, a 1k ohm potentiometer,
or a fixed resistor network.
It maintains a full range regulation of 0.5%, and a limited range regulation
of 0.25%. This unit is field configurable for feed back voltages
up to 600 VAC, full range/limited range, and type of control. Each
FRC-20 includes a 1 amp motor supply fuse and a set point supply trim
potentiometer. It is a compact package, and can be easily mounted
on the motor plate or inside an enclosure. Contact your sales representative
or the factory for current and other feed back alternates.
More
Information about the FRC-20 Controller (.pdf)
Engineering Drawing
for FRC-20
View
.pdf documents with free Acrobat
Reader download.
