SPXR500-28VDC
Voltage Regulator
The SPXR500-28VDC is a unique
voltage regulator that is designed
specifically for aircraft ground power
units that operate at 60hz and provide
28vdc ground power.
The SPXR500-28VDC senses the
28vdc at the aircraft connection point
of the supply cord and compensates
for any line loss due to heavy DC
current loading. It also incorporates
selectable frequency ranges for
voltage roll off during under-frequency
operation and precise voltage
regulation regardless of ambient
temperature.
Specifications
The SPXR500-28VDC incorporates
patented electronic circuitry that
allows an installer to match the
regulator to many differing
configurations of exciters without
special transformers or inline
resistors.
The SPXR500-28VDC can be
externally controlled with a PLC or
Genset controller by simply adding an
optional
interface module.
Input Voltage:
120 / 208 or 240vac
Sensing Voltage:
24-30vdc
Frequency:
50 or 60hz
Voltage Regulation:
+/- 1 % From NL to FL
Parallel Operation
No
Output Voltage:
0-52vdc @ 120vac input
0-105vdc @ 240vac input
0-210vdc @ 240vac input
Maximum Continuous Output:
5adc
All major electronic components are
not encapsulated so that they can
easily be repaired while all sensitive
components are encapsulated to
protect them from contamination. The
SPXR500-28VDC can be used with
all optional modules that were
available for use with the earlier
models of Power-Tronics regulators.
Minimum Field Resistance:
10.5Ω @ 52vdc output
21Ω @ 105vdc output
42Ω @ 210vdc output
Min Residual Build up Voltage:
3.5vac
Under Frequency Protection:
Yes, VPH reduction
Physical Size:
4.75 x 6 x 1 in.
Weight:
9 oz
Repairable:
Yes
Internal Protection:
Fuses, cartridge type
External Voltage Adjustment:
Yes
System Operating Indicator:
Yes
Optional Static Exciter Modules
Yes
Optional External Controls
Yes
© 2012 Power-Tronics, Inc.
