Atec Pacific-Power_GSeries - Manual (Page 7)

Output Power
See model listings for appropriate full power ratings.
Output Voltage
Nominal system voltage is 125 V L-N three phase or single phase. Output
voltage is fully adjustable from 0–125 V L-N. Three phase forms are configured as
WYE and are capable of being loaded either DELTA or WYE.
Alternate Output Voltage
For output forms other than the nominal 125 V L-N refer to System
Configuration, page 3.
Output Frequency
Determined by control options.
• 47–500 Hz – Standard with 301-C or 301-E Controller.
• 45–2,000 Hz – Standard with SCU/UPC 32 Programmable Controller.
45–5,000 Hz – Optional.
Output Current
See model listings. Peak currents listed are available at the crest of the
voltage sinewave for driving inverter or power supply loads without distortion
or limiting.
Load Power Factor
Output will drive loads of any power factor leading or lagging. (see P.F.
Performance Curve).
Line Regulation
0.1% maximum for ±10% line change.
Load Regulation
±0.1% at the voltage sense point. May vary due to contactor and cabling
losses after the sense point. ±0.25% at system output terminals (3Ø direct-
coupled outputs).
Load Balance Restriction
None – all performance specifications apply with any amount of load
imbalance.
Load Transient Response
120-GR, 10 microseconds maximum. Applies to a 100% step change in load,
any phase, or any combination of phases.
Output Distortion
0.75% total harmonic distortion maximum (0.50% typical).
Output Protection
Integral electronic current limiting with auto recovery.
Output Isolation
Output is fully isolated from input and frame ground.
Output Storage (Ride-Through)
Output undisturbed by line
interrupts of several milliseconds-
load dependent.
Output DC Offset
DC offset is less than ±10 mV
DC.
Phase Separation
“C” Type Systems –3Ø WYE 120° ±1.0° regardless of load balance.
3Ø DELTA 60° ±1.0° regardless of load balance.
Control Characteristics
“C” Type Systems variable frequency, 1Ø or 3Ø switch selectable operation.
Output frequency – 1 continuous variable range of 47–500 Hz, dial accuracy
±1%, stability 0.25%, 3 pushbuttons select preset frequencies of 50, 60,
400 Hz. Accuracy ±0.1% ±0.5 Hz. Stability ±0.1%. NOTE: Pushbutton switches
are equipped with a lockout feature to prevent accidental changes. External
Input – one per phase, fully isolated. Allows system to operate as 3
independent amplifiers (3 phase mode).
Amplitude Control – master control varies all phase(s). 0–full scale amplitude.
3 phase systems have ±10% trim adjustments on B & C phases.
Metering – 4½˝ meter movement capable of measuring V L-N and V L-L via a
six-position pushbutton switch (1Ø system V L-N only). “S” Type Systems (see
page 6 for control capabilities).
1 Phase/3 Phase Operation
A manual switch allows conversion from 1 phase power forms to 3 phase
power forms, instantly. 3 phase systems may be loaded either as WYE or DELTA.
Input Power Forms
The G Series power source is capable of operating from any of the listed
input forms:
Form A: 240 VAC, 3Ø DELTA, 47–63 Hz.
Form C: 120/208 VAC, 3Ø WYE, 47–63 Hz.
Form D: 460 VAC, 3Ø DELTA, or 3Ø Ungrounded WYE, 47–63 Hz. Other power forms
are available; consult factory.
Failure Isolation System
Any failed output device, multiple devices or power module is electronically
disconnected from system output. Failure location is identified by service
lamps and diagnostic meter on each power module. Service can be provided
when convenient by replacing power modules. Power modules can be
replaced WITHOUT system shutdown and without disturbances to system operation.
UPS Option
When performance, maintenance
and logistics cannot be
compromised, choose Pacific
Power Source systems.
Pacific Power’s UG Series Uninterruptible Power Source (UPS)
Systems are configured from standard G Series AC Sources and
UG-18 Battery Support Cabinets. The UG-18 Battery Support
Cabinet is a complete battery back-up system that supports any
of the G Series AC Power Source Systems (6,12 or 18 kVA). One
UG-18 cabinet is provided with each G Series mainframe offering
paralleled systems up to 90 kVA.
Electrical Specifications
Frequency 45.00 to 5,000 Hz ±0.01%.
Voltage Direct Programmable, 0–V
MAX
, in 0.1 V steps
(see table on page 4).
Voltage Multi-range units are equipped with output
Transformer transformers. When alternate range is
selected, voltage at transformer output is
programmable in steps of 0.5 V.
Accuracy Executive voltage is within ±50 mV
Command (0.03%) of command voltage,
Voltages referenced to the internal voltmeter with
CSC engaged.
Accuracy
Command
± 0.01%, 45–5,000 Hz.
Frequency
Output Z
o
Dynamic output impedance (Z
o
) is
(Optional) programmable, 0 to ± Z
o
max. in 0.1%
steps. Z
o
value in milliohms varies with
different models but usually results in a
±10% change in output voltage at
maximum load amps.
Phase Angle Phase Angle (Ø) of Phases B and C
relative to Phase A is programmable from
0°–359° in 1° increments ±0.5°.
Current Limit Current limit is programmable from
0 to I
peak
maximum of the power source.
Accuracy is ±1%, resolution ±0.05%.
Library Steady Stores up to 99 steady state parameter
State Programs sets consisting of waveform, voltage,
frequency, Ø angle and current limit. Can
be executed by program number
from the front panel or the bus.
Library Transient Stores up to 99 transient programs –
Programs one associated with each steady state
program. Allows for changes in volts and
frequency vs. time, or waveform changes
by cycle count.
Library Waveforms Stores up to 99 waveforms that
can be edited and executed in any
manner and in any output phase.
Voltmeter Range 0–354 V L-N.
0–708 V L-L.
Resolution 0.10V
AC
to front panel.
0.001V
AC
to remote interface.
Accuracy ±0.25% of reading ±0.1%
of range (50–500 Hz).
Ammeter Range 300% of system current rating.
Resolution 0.01A
AC
to front panel.
0.001A
AC
to remote interface.
Accuracy ±0.25% of reading ±0.1%
of range (50–500 Hz).
Power Range Based on ammeter range.
Meter Resolution 1.0 watts or VA to front panel.
0.001 Watts or VA to remote interface.
Accuracy ±0.30% of reading ±0.14% of range.
Power Calculated and displayed to three significant digits.
Factor/
Crest Factor
Ext. Input Each phase is algebraically summed with UPC wave
form and amplified 25× to the direct output.
Amplitude ±10 V input for each phase modulates the output
Mod. ±100%.
Input
Sync 1) Zero crossing, Phase A.
Outputs 2) Transient start-stop.
3) True when Transient is enabled.
4) Clock – 1024 times the output frequency
Command Average time to start of parameter
Response change from bus command (end of string character)
Time is 50 ms.
Ramp transition time to final value is settable from
200 µs to 300 sec.
Waveform Permits waveform creation by entering %
Synthesis amplitude and phase angle for the 2nd through the
51
ST harmonics.
Waveform Reports voltage and current waveform
Analysis Analysis harmonic content in % and phase angle for
the 2nd through the 51
ST harmonics. Displays THD,
OHD, EHD in %.
SCU/UPC-32 Controller Specifications
The UPC controller is a 3Ø AC arbitrary waveform generator and precision AC metering system. Each waveform stored
in the UPC is encoded with 12-bit amplitude and 10-bit time resolution for each cycle. The waveform for each phase
may be independently selected and varied in amplitude and phase angle with respect to phase A.
The UPC output metering samples the output volts and amps at 512 samples per measurement using a 12-bit A/D
converter. This technique provides exceptional metering accuracy and resolution (20 bits), and delivers a high-fidelity
waveform back to a host computer for analysis.
The UPC includes a remote GPIB interface compatible with IEEE-488.2 and SCPI. An available option is an RS-232
serial port that operates up to 38.4 kBaud.
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