Atec Pacific-Power_GSeries - Manual (Page 4)

Model Number Information
Standard Models are complete systems ready for use, including cabinets, oscillators, input circuit breakers and output
contactors. Use model designations below to design the system that is right for your application.
Continuous Self Calibration
Provides for exceptional accuracy of the AC Output Voltage. When enabled,
accuracy improves to ±0.03% referenced to the power source internal voltmeter.
Programmable Dynamic Output Impedance (Optional)
Provides positive or negative output impedance. The output voltage waveform at
the right is flattened as a result of a high peak load current drawn by an
electronic load at the peak of the sinewave.
Engaging the dynamic output impedance (Z
O
) feature dynamically compensates,
as shown at the right, for the distribution or transformer losses up to ±10% of
the output voltage.
Waveform Edit
Provides the ability to modify a stored waveform by specifying the waveform
amplitude desired at each specific phase angle. This method can be used to
quickly create spikes, dropouts, notches and other sub-cycle wave conditions.
The resulting modified waveform can be stored for execution.
Waveform Library
Up to 99 different waveforms may be stored in the waveform library for
execution as part of a steady state test program or for substitution in any output
phase as part of a transient test program. Memory location #1 is a non-editable
high resolution sine wave. Locations 2–16 are editable and may be substituted in
any output phase.
Waveform Analysis (Optional)
Provides numeric display of the harmonic structure of a voltage or current
waveform. The waveform is sampled at 512 samples per cycle using a 12-bit
A/D converter. The resulting high fidelity waveform is analyzed for its harmonic
structure up through the 51
ST harmonic. Data presented includes the magnitude
of each harmonic in percent, the total harmonic distortion, and the odd and even
harmonic distortion in percent. Displays Vrms, Irms, Ipk, Power, VA and PF.
Waveform Synthesis (Optional)
Provides the ability to quickly create virtually any AC Test Waveform that may be
required by building it out of harmonics. The process is as simple as keying in
the harmonic multiple, the amplitude, and the phase angle for each desired
harmonic up through the 51
ST . If desired, waveforms may also be created in the
time domain by making entries from the front panel or by downloading from a
host PC.
Time-Based Transients
Provides the ability to create and execute, on command, transients that occur
linearly over a specified time segment to modify output voltage or frequency.
Cycle-Based Transients
Provides the ability to create and execute, on command, transients that substi-
tute a selected waveform in the output for 1 to 100 cycles. The waveform being
substituted can be selected and/or modified from the waveform library.
Substitution is for an integer number of cycles, regardless of frequency.
390-GR
I I I I
- 6 6 120 48 144 120/208 WYE or 208 DELTA 16 48 1 ea. 390-G
390-GR
I I I I
-12 12 120 96 288 120/208 WYE or 208 DELTA 32 96 1 ea. 390-G
390-GR
I I I I
-18 18 120 144 432 120/208 WYE or 208 DELTA 48 144 1 ea. 390-G
3120-GR
I I I I
24 120 192 576 120/208 WYE or 208 DELTA 64 192 2 ea. 390-G
3150-GR
I I I I
30 120 240 720 120/208 WYE or 208 DELTA 80 240 2 ea. 390-G
3180-GR
I I I I
36 120 288 864 120/208 WYE or 208 DELTA 96 288 2 ea. 390-G
3210-GR
I I I I
42 120 336 1008 120/208 WYE or 208 DELTA 112 336 3 ea. 390-G
3240-GR
I I I I
48 120 384 1152 120/208 WYE or 208 DELTA 128 384 3 ea. 390-G
3270-GR
I I I I
54 120 432 1296 120/208 WYE or 208 DELTA 144 432 3 ea. 390-G
3360-GR
I I I I
72 - - - 120/208 WYE or 208 DELTA 192 576 4 ea. 390-G
3450-GR
I I I I
90 - - - 120/208 WYE or 208 DELTA 240 720 5 ea. 390-G
MODEL
CABINETS
1 PHASE OUTPUT 3 PHASE OUTPUT
OUTPUT
POWER
(kVA)
VOLTS
(RMS) AMPS
(RMS)
AMPS
(PEAK)
AMPS/LEGS
(RMS)
AMPS/LEGS
(PEAK)
VOLTS (RMS)
Fixed
and/or
Variable
Frequency
1 phase or
3 phase
User Switch
Selectable
Models
A Power System is assembled using the options defined by the following model designations:
Control and Power Options
301-C Variable Control Module (Manual)
• Provides for selection of three different control options:
1. Internal fixed frequencies of 50, 60 and 400 Hz.
2. Continuously variable oscillator from 47 to 500 Hz.
3. External signal generator inputs.
• Provides for selection of the output power form:
1. Single phase operation.
2. Three phase operation.
• Provides control of the mainframe output contactor to turn power
on and off.
301-F Universal Control Module (Manual)
• Provides for selection of three different control options:
1. Internal fixed frequencies of 50, 60 and 400 Hz.
2. External signal generator inputs.
3. Input from the SCU/UPC-32 Programmable Controller from
45 to 5,000 Hz.
• Provides for selection of the output power form:
1. Single phase operation.
2. Three phase operation.
• Provides control of the mainframe output contactor to turn power
on and off.
SCU/UPC-32 Programmable Controller
• Provides total control of the output signal from either the front
panel keypad or from a remote computer via the IEEE or RS-232
(optional) BUS.
Programmable parameters include:
1. Frequency.
2. Frequency transients.
3. Phase angle separation.
4. Voltage amplitude.
5. Voltage amplitude transients.
6. Transient phase (any combination of phases).
7. Transient starting phase angle.
8. Waveform generation.
• Requires 301-F universal control module.
Power Modules (Standard)
120-GR Enhanced power modules for applications requiring motor
starting, high short circuit current, frequencies from 45 to 5,000 Hz
and fast transient and harmonic reproduction.
Output Magnetics
• Standard internally mounted output autoformers provide many
popular output voltage options. See partial listing under System
Block Diagram on page 3.
• Other special magnetics options are available.
Special Features Available with the
SCU/UPC-32 Programmable Controller
Oscillograph of voltage and current
waveform at load due to distribu-
tion losses. THD=6.6%
Same conditions as above with
programmable Z
º
engaged.
THD=0.25%
THD=8.7% THD=22.2% THD=18.1%
WAVEFORM EDIT
WAVEFORM SYNTHESIS
HARMONIC CONTENT OF METERED WAVEFORM
TIME-BASED TRANSIENTS
CYCLE-BASED TRANSIENTS
EDIT WAVEFORM: NUMBER=16 RANGE=2-16
STARTING PHASE ANGLE=0 0-359.5°
ENDING PHASE ANGLE=0 0-359.5°
VOLTAGE IN PERCENT=-100 (+/-)0-100%
WAVEFORM SYNTHESIS: WAVEFORM #2
HARMONIC:
2nd 3rd 4th 5th 6th
CONTENT: .1% 0% 0% 0% 0%
ØANGLE: 0° 0° 0° 0° 0°
4 5