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Load Regulation: ±0.025% of full scale voltage for a full resistive load to no load; above 1 kHz, add ±0.01%/kHz
Line Regulation (DC, or 40 Hz to 5 kHz): ±0.025% of full scale for a ±10% input line change
Voltage Accuracy: ±0.1% of range. Above 1 kHz, add 0.2%/kHz. Add ±0.1% of full scale for "AC PLUS DC" mode. Valid for 5 to 156 VRMS and 10 to 312 VRMS at 25°C
Voltage Resolution: 0.05% of full scale
Frequency Resolution: 0.01 Hz: 40 Hz to 99.99 Hz 0.05 Hz: 100 Hz to 999.9 Hz 0.5 Hz: 1000 Hz to 5000 Hz
Frequency Accuracy: ±0.01% at 25°C ±0.001%/°C Phase Accuracy, Phase-to-Phase Balanced Linear Resistive Load: ±1°, 40 Hz to 1 kHz, plus ±1°/kHz above 1 kHz
Phase Angle Resolution: 0.1°
Remote Output Voltage Sense: 5 VRMS total lead drop, max

| Rear Panel |
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1. Sync out
2. Clock and lock
3. Ext. in±7.5V max
4. RS 232*
5. DFI
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6. IEEE 488.2
7. Slave I/O
8. Output power terminal barrier
9. Remote sense terminal barrier
10. Fuse F1, Fuse F2, Fuse F3
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11. Input, neutral lug, single barrel
12. Safety ground
13. Chassis ground |
Waveform Specifications
Waveshape Libraries:
50 factory supplied in ROM; storage available for up to 50 user created in non-volatile RAM.
Front Panel Setups: A total of 50 user created steady-state
waveforms, with amplitude, frequency, phase angle and current limit parameters.
Sequencing Library: 1000 user created segments stored in
non-volatile RAM. Segments include waveshape, amplitude, frequency, phase angle, time
(from 1 ms to 1000 seconds), or number of cycles.
MIL-STD-704 Transient Library
Measurements (Optional)
- Phase to Neutral RMS Output Voltages
- Phase to Phase Voltages
- 1Ø to 3Ø RMS Output Currents
- Peak Current n Output Frequency
- 1Ø to 3Ø Power
- 1Ø to 3Ø VA
- Power Factor of 1Ø or 3Ø Loads
- Output Phase Angles Relative to Phase A
Measurement Capability: 4.5 Digit Analog to Digital Measurement System with .01% of full scale resolution
unless otherwise noted. All accuracies 25°±5°C
Calibration Interval: 12 months
Operating/Accuracy Temperature Range: 0°C to 45°C (32°F to 113°F)
Temperature Coefficient: ±500 ppm/°C outside specified range
Phase to Neutral RMS Voltage Measurement
Valid for phases A, B and C (use phase A for Parallel Mode)
Range: 0V to 350V plus sign bit for DC range
Accuracy: ±0.3% of range, DC or 47 Hz to 1 kHz; ±0.5% of range, 40 to 47 Hz and for 1 kHz to 5 kHz
Phase to Phase RMS Voltage: Calculated from Phase to Neutral voltages and phase angle
Range: 0V to 700V
Accuracy and Temperature Coefficient: The same as the Phase to Neutral voltage
RMS Current Measurement
Valid for phases A, B, and C (use phase A for Parallel Mode)
Range 1: 0A to 7.5A plus sign bit for DC range; 3Ø mode, 312V range
Range 2: 0A to 15A plus sign bit for DC range; 3Ø mode, 156V range
Range 3: 0A to 22.5A plus sign bit for DC range; parallel mode, 312V range
Range 4: 0A to 45A plus sign bit for DC range; parallel mode, 156V range
Accuracy: ±1.0% of range, DC or 40 Hz to 500 Hz; add ±1.5%/kHz above 500 Hz. Accuracies are specified for a max crest factor of 4.0.
Temperature Coefficient: ±500 ppm/°C outside specified range
Note: Contact factory for measurement range on 10.5 to 21 kVA system.
Peak Current Measurement
Valid for phases A, B, and C (use phase A for Parallel Mode)
Range 1: 0A to 28A; 3Ø mode, 312V range
Range 2: 0A to 56A; 3Ø mode, 156V range
Range 3: 0A to 84A; parallel mode, 312V range
Range 4: 0A to 168A; parallel mode, 156V range
Accuracy: ±5% of range, 40 to 500 Hz; add ±1%/kHz, 500 Hz to 5 kHz
Power Measurement:Valid for phases A, B, and C. Up to 3Ø total power and parallel mode (use phase A for parallel mode)
Range 1: 0 kW to 1.8 kW; 3Ø mode
Range 2: 0 kW to 5.6 kW; parallel mode and total 3Ø power
Accuracy: ±2.5% of range, DC or 40 to 500 Hz for crest factors <2.0. Add ±1% for crest factors up to 4.0. Add ±1%/kHz above 500 Hz VA
Measurement: Valid for phases A, B, and C. Up to 3Ø total VA and parallel mode (use phase A for parallel mode)
Range 1: 0 kW to 1.8 kVA; 3Ø mode
Range 2: 0 kW to 5.6 kVA; parallel mode and total 3Ø power
Accuracy: ±2.5% of range, DC or 40 to 500 Hz for crest factors <2.0. Add ±1% for crest factors up to 4.0. Add ±1%/kHz above 500 Hz.
Power Factor:Valid for phases A, B, and C (use phase A for Parallel Mode). The Power Factor is calculated from the Power and VA measurements.
Range: 0 to 1.00
Accuracy: ±5% of range at full power, DC or 40 to 500 Hz for crest factors <2.0. Add ±2% for crest factors up to 4.0. Add ±1%/kHz above 500 Hz.
Frequency Measurement: Frequencies are calculated based on output zero crossing time measurements.
Resolution: Frequency is displayed to 5 digits max; leading zeros are blanked. Displayed resolution is 0.01 Hz.
Accuracy: ±0.5% of reading, at 10% to full output voltage, 0°C to 45°C
Phase Measurement: Valid for phases A, B, and C relative to each other
Resolution: ±1°
Accuracy: ±2°, 40 to 500 Hz; add ±2°/kHz above 500 Hz. For sine wave, balanced resistive load, 10% to 100% of voltage measurement range
Input
Input Voltage Ranges: Factory configured 187 to 264 VRMS, 3Ø L-L (3 wire), or 342 to 457 VRMS, 3Ø L-L (4 wire). A chassis ground is also required. 115 or 230 VAC single-phase is required for PDU in 10.5-21 kVA systems. (400 Hz input allowed with PFC option)
Input Power Factor: 0.6 (.35 for Intl. Rectifier; 0.99 with PFC option)
Note: With PFC option the inputs may be paralleled and wired for single phase input. Consult factory.
Input Frequency Range: 47 to 63 Hz
Efficiency: 70% min., at full load
Ride Through: 3 ms min.; 10 ms min., with PFC option
Protection and Safety
Overvoltage Shutdown: Programmable for 20V to 255V peak, 156V range; 40V to 510V peak, 312V range
Programmable Current Limit Shutdown: Settable to 1% of range (0.5A to 13A for 156V range; 0.5A to 6.5A for 312V range)
Programmable Current Limit with Timed Shutdown: Settable to 1% of range: the timeout is settable from 10 ms to 10s.
Programmable Constant Current: Settable to 1% of range (0.5A to 13A for 156V range; 0.5A to 6.5A for 312V range). For all current accuracies, add ±1.5%/kHz above 500 Hz. For paralleled amplifiers, add ±1%.
Overtemperature Shutdown: (automatic, not programmable) Designed to Meet the Following:
- EN 61010
- EN 55011
- UL 3111
- EN 50082-2
- 61000-4-3, 61000-4-4
- FCC Part 15, Class A
- CE Mark
Physical Specifications
Height: 8.75 in (222 mm)
Width: 19 in (483 mm)
Depth: 23.5 in (597 mm)
Weight:
SW 1750A - 73 lbs (33.1 kg)
SW 3500A - 100 lbs (45.4 kg)
SW 5250A - 127 lbs (57.5 kg)
Shipping Weight:
SW 1750A - 160 lbs (73 kg)
SW 3500A - 180 lbs (82 kg)
SW 5250A - 200 lbs (91 kg)
Note: 10.5, 15.75 and 21 kVA systems, dimension and weight are approximately
x2, x3 and x4 SW 5250A specifications
Cooling: Air is drawn in from the top, bottom, and sides and exhausted through the rear.
Environmental Data
Operating Temperature: 0°C to 45°C (32°F to 113°F)
Storage Temperature: -40°C to 70°C (-40°F to 158°F)
Humidity (Non-condensing): 0 to 85% at 25°C (77°F); derate to 50% at 40°C (104°F)
Altitude: Operating 10,000 ft, non operating 40,000 ft
Other Standard Features
- 1Ø to 3Ø programmable
- IEEE-488.2 interface
- SCPI protocol
- WaveForm trigger output: (1 MOhms Load Drive)
- BNC outputs for scope viewing of waveforms (1 MOhms Load Drive)
- SYNC OUT. User programmed for: Cycle start, all cycles. Segment start, all or selected segments. For loads > 2 kOhms: V out < 1V low state; V out > 2.4V high state
- External Amplitude Modulation 0 to 5 VRMS provides 0 to > 20% output amplitude modulation.
- Clock/lock:
Clock pulses at programmed frequency. For loads> 2 kOhms V out: <1V low state; V out > 2.4V high state
Lock locks output to input 'TTL' frequency; signal needs to supply pull down current of 15 mA with voltage drop of < 0.6V; no pull up needed.
- External Drive: Normal amplifier, 0 to 5 VRMS (DC to 5 kHz) or ±5 VDC input for zero to full voltage output
- External Gain Control 0 to ±7.07 VDC provides zero to full output
- External Input Impedance > 30 kOhms
Options:
- Measurement capability
- Input power factor correction to 0.99
- Parallelable for additional power from 10.5 kVA to 21 kVA
- External waveform creation software
- 5V or 26V, 0.25A auxiliary AC outputs
- Custom cabinets for 10.5, 15.75 & 21 kVA systems
- Interharmonic waveform generator
- Low speed fan option
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