ST/STR/STA MANUAL
1
118107-001 REV J
Chapter 1
I
NTRODUCTION
1.1 Description of the
ST/STR/STA Series
ST/STR
STA
he ST series of high voltage power supplies provides
very well regulated, low ripple high voltage in a
highly efficient, compact design. Extremely stable
voltage and current outputs result in significant
performance improvements over previously available
technology.
All of these advancements are possible only by
Spellman’s long history in high voltage power conversion
technology. This series of power supplies utilizes
extremely advanced quasi-resonant PWM conversion
techniques, along with sophisticated digital technology.
The output voltage, current and power are continuously
adjustable over their full rated range. The standard ST
operates from 180-264Vac, three phase power and is
forced air cooled. An optional 360-528Vac input
(400VAC) is available. Custom units to meet special
requirements and specific applications can also be
provided.
The STR Series high voltage power supplies are identical
in form, fit and function to the ST Series the following
exceptions:
1)
The STR only provides 6kW’s of output power.
2)
The ripple specification for the STR is 0.1% p-p
+1Vrms.
3)
It is not possible to parallel STR chassis. If
additional power is required use an ST Series
unit.
4)
The SRT is available with an optional 180-
264Vac single phase input voltage.
Aside from these four points, the STR and ST are for all
practical purposes identical. For the sake of clarification
the following text only references ST, but all points apply
to the STR Series as well.
The STA Series of high voltage power supplies are
identical to the ST Series with the following exceptions:
1)
The STA is a 5.25 inch tall (3U) chassis.
2)
The STR only provides 4kW’s of output power.
3)
The ripple specification for the STA is 0.1% p-p
+1Vrms.
4)
It is not possible to parallel STA/STR chassis. If
additional power is required use an ST Series
unit.
5)
The STA is available with an optional 180-
264Vac single phase input voltage.
Customary warranty terms apply to standard units.
Consult the Spellman Sales Department about the
warranty for custom/X numbered units.
1.2 Standard Features
The ST series incorporates several standard features and
software configurable items designed to optimize user
utility, satisfaction and safety.
FRONT
PANEL
CONTROL
POWER/HIGH
VOLTAGE ON/ HIGH VOLTAGE OFF SWITCHES
:
These intuitive front panel controls allow the user to
T
