Ametek SW 5550AE User manual

Contact Information
Telephone: [phone] (toll free in North America)
858 450 0085 (direct)
Fax: [phone]
Email:
Domestic Sales: [e-mail]
International Sales: [e-mail]
Customer Service: [email protected]
Web: www.programmablepower.com
SmartWave™
Switching
Amplifier
Operation Manual
March 2011 Document No. M161668-01 Rev E
This manual covers models:
SW 5550AE
SW 3700AE
SW 1850AE

i
About AMETEK
AMETEK Programmable Power, Inc., a Division of AMETEK, Inc., is a global leader in the design
and manufacture of precision, programmable power supplies for R&D, test and measurement,
process control, power bus simulation and power conditioning applications across diverse
industrial segments. From bench top supplies to rack-mounted industrial power subsystems,
AMETEK Programmable Power is the proud manufacturer of Elgar, Sorensen, California
Instruments and Power Ten brand power supplies.
AMETEK, Inc. is a leading global manufacturer of electronic instruments and electromechanical
devices with annualized sales of $2.5 billion. The Company has over 11,000 colleagues working
at more than 80 manufacturing facilities and more than 80 sales and service centers in the United
States and around the world.
Trademarks
AMETEK is a registered trademark of AMETEK, Inc.
Other trademarks, registered trademarks, and product names are the property of their respective
owners and are used herein for identification purposes only.
Notice of Copyright
SmartWave Switching Amplifier, Operation Manual © 2010 AMETEK Programmable Power, Inc.
All rights reserved.
Exclusion for Documentation
UNLESS SPECIFICALLY AGREED TO IN WRITING, AMETEK PROGRAMMABLE POWER, INC.
(“AMETEK”):
(a) MAKES NO WARRANTY AS TO THE ACCURACY, SUFFICIENCY OR SUITABILITY OF ANY
TECHNICAL OR OTHER INFORMATION PROVIDED IN ITS MANUALS OR OTHER
DOCUMENTATION.
(b) ASSUMES NO RESPONSIBILITY OR LIABILITY FOR LOSSES, DAMAGES, COSTS OR
EXPENSES, WHETHER SPECIAL, DIRECT, INDIRECT, CONSEQUENTIAL OR INCIDENTAL,
WHICH MIGHT ARISE OUT OF THE USE OF SUCH INFORMATION. THE USE OF ANY SUCH
INFORMATION WILL BE ENTIRELY AT THE USER’S RISK, AND
(c) REMINDS YOU THAT IF THIS MANUAL IS IN ANY LANGUAGE OTHER THAN ENGLISH,
ALTHOUGH STEPS HAVE BEEN TAKEN TO MAINTAIN THE ACCURACY OF THE
TRANSLATION, THE ACCURACY CANNOT BE GUARANTEED. APPROVED AMETEK CONTENT
IS CONTAINED WITH THE ENGLISH LANGUAGE VERSION, WHICH IS POSTED AT
WWW.PROGRAMMABLEPOWER.COM.
Date and Revision
March 2011 Revision E
Part Number
M161668-01
Contact Information
Telephone: [phone] (toll free in North America)
858 450 0085 (direct)
Fax: [phone]
Email: [e-mail]
[e-mail]
Web: www.programmablepower.com

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iii
Important Safety Instructions
Before applying power to the system, verify that your product is configured properly for your
particular application.
WARNING
Hazardous voltages may be present when covers are removed. Qualified
personnel must use extreme caution when servicing this equipment.
Circuit boards, test points, and output voltages also may be floating above
(below) chassis ground.
WARNING
The equipment used contains ESD sensitive ports. When installing
equipment, follow ESD Safety Procedures. Electrostatic discharges might
cause damage to the equipment.
Only qualified personnel who deal with attendant hazards in power supplies, are allowed to perform
installation and servicing.
Ensure that the AC power line ground is connected properly to the Power Rack input connector or
chassis. Similarly, other power ground lines including those to application and maintenance
equipment must be grounded properly for both personnel and equipment safety.
Always ensure that facility AC input power is de-energized prior to connecting or disconnecting any
cable.
In normal operation, the operator does not have access to hazardous voltages within the chassis.
However, depending on the user’s application configuration, HIGH VOLTAGES HAZARDOUS TO
HUMAN SAFETY may be normally generated on the output terminals. The customer/user must
ensure that the output power lines are labeled properly as to the safety hazards and that any
inadvertent contact with hazardous voltages is eliminated.
Guard against risks of electrical shock during open cover checks by not touching any portion of the
electrical circuits. Even when power is off, capacitors may retain an electrical charge. Use safety
glasses during open cover checks to avoid personal injury by any sudden component failure.
Neither AMETEK Programmable Power Inc., San Diego, California, USA, nor any of the subsidiary
sales organizations can accept any responsibility for personnel, material or inconsequential injury,
loss or damage that results from improper use of the equipment and accessories.
SAFETY SYMBOLS

iv
Product Family: SW 5550AE, SW 3700AE, SW 1850AE
Warranty Period: One Year
WARRANTY TERMS
AMETEK Programmable Power, Inc. (“AMETEK”), provides this written warranty covering the
Product stated above, and if the Buyer discovers and notifies AMETEK in writing of any defect in
material or workmanship within the applicable warranty period stated above, then AMETEK may,
at its option: repair or replace the Product; or issue a credit note for the defective Product; or
provide the Buyer with replacement parts for the Product.
The Buyer will, at its expense, return the defective Product or parts thereof to AMETEK in
accordance with the return procedure specified below. AMETEK will, at its expense, deliver the
repaired or replaced Product or parts to the Buyer. Any warranty of AMETEK will not apply if the
Buyer is in default under the Purchase Order Agreement or where the Product or any part
thereof:
is damaged by misuse, accident, negligence or failure to maintain the same as
specified or required by AMETEK;
is damaged by modifications, alterations or attachments thereto which are not
authorized by AMETEK;
is installed or operated contrary to the instructions of AMETEK;
is opened, modified or disassembled in any way without AMETEK’s consent; or
is used in combination with items, articles or materials not authorized by AMETEK.
The Buyer may not assert any claim that the Products are not in conformity with any warranty
until the Buyer has made all payments to AMETEK provided for in the Purchase Order Agreement.
PRODUCT RETURN PROCEDURE
1. Request a Return Material Authorization (RMA) number from the repair facility (must be
done in the country in which it was purchased):
In the USA, contact the AMETEK Repair Department prior to the return of the
product to AMETEK for repair:
Telephone: [phone], ext. 2295 or ext. 2463 (toll free North America)
858-450-0085, ext. 2295 or ext. 2463 (direct)
Outside the United States, contact the nearest Authorized Service Center
(ASC). A full listing can be found either through your local distributor or our
website, www.programmablepower.com, by clicking Support and going to the
Service Centers tab.
2. When requesting an RMA, have the following information ready:
Model number
Serial number
Description of the problem
NOTE: Unauthorized returns will not be accepted and will be returned at the shipper’s expense.
NOTE: A returned product found upon inspection by AMETEK, to be in specification is subject to
an evaluation fee and applicable freight charges.

Operation Manual v
CONTENTS
SECTION 1 GENERAL DESCRIPTION
1.1 Introduction.................................................................................................... 1-1
1.2 Input Specifications ....................................................................................... 1-2
1.3 Output Specifications: IEC Test Modes......................................................... 1-3
1.4 Waveform Specifications............................................................................... 1-4
1.5 Interharmonics Waveform Generator (Optional) ........................................... 1-5
1.6 Protection and Safety.................................................................................... 1-5
1.7 Agency Requirements ................................................................................... 1-6
1.8 Physical Specifications (All Models).............................................................. 1-6
1.9 Environmental Data....................................................................................... 1-6
1.10 Other Standard Features............................................................................... 1-7
1.11 Options.......................................................................................................... 1-8
1.12 Glossary of Technical Terms......................................................................... 1-9
1.12.1 IEC Test Modes ................................................................................ 1-9
1.12.2 Interharmonic Waveform Generator (IWG)....................................... 1-9
SECTION 2 INSTALLATION
2.1 Introduction.................................................................................................... 2-1
2.2 Unpacking...................................................................................................... 2-1
2.3 Pre-Installation Inspection ............................................................................. 2-2
2.4 Installation ..................................................................................................... 2-2
2.5 Air Intake and Exhaust .................................................................................. 2-2
2.6 Installation/Dimensional Drawing................................................................... 2-3

Contents SW 5550AE • SW 3700AE • SW 1850AE
vi Operation Manual
2.7 Input/Output Connectors................................................................................2-6
2.7.1 BNC Connectors................................................................................2-7
2.7.2 EXT IN (External Input)......................................................................2-7
2.7.3 DFI (Direct Fault Indicator) ................................................................2-8
2.7.4 IEEE 488.2 ........................................................................................2-9
2.7.5 Slave Connector................................................................................2-9
2.7.6 Grounding........................................................................................2-10
2.8 Input Power Requirements...........................................................................2-10
2.8.1 187 to 264 VRMS 3-Phase Operation (3-Wire USA).......................2-12
2.8.2 342 to 457 VRMS 3-Phase Operation (4-Wire INTL) ......................2-12
2.8.3 Single-Phase Input Connections .....................................................2-12
2.9 Output Connections to the Load ..................................................................2-13
2.9.1 SW 5550AE Output Connections....................................................2-13
2.9.2 SW 3700AE Output Connections....................................................2-15
2.9.3 SW 1850AE Output Connections....................................................2-15
2.9.4 Wiring of Unit...................................................................................2-15
2.10 Wire Gauge Selection..................................................................................2-15
SECTION 3 OPERATION
3.1 Introduction ....................................................................................................3-1
3.2 Front Panel Controls......................................................................................3-1
3.3 Menus ............................................................................................................3-3
3.3.1 MAIN MENU......................................................................................3-4
3.3.2 PROGRAM Menu..............................................................................3-5
3.3.3 MEASURE Menu...............................................................................3-8
3.3.4 WAVEFORM Menu ...........................................................................3-8
3.3.5 SEQUENCE Menu...........................................................................3-14
3.3.6 INSTR (Instrument) Menu................................................................3-21
3.3.7 SYSTEM Menu................................................................................3-22
3.4 Front Panel Programming Conventions.......................................................3-31
3.5 Front Panel Programming Exercise .............................................................3-32
3.6 SCPI Specification .......................................................................................3-36

SW 5550AE • SW 3700AE • SW 1850AE Contents
Operation Manual vii
SECTION 4 STANDARD WAVEFORMS
LIST OF TABLES
Table 2–1 Recommended Mounting Slide.................................................................. 2-3
Table 2–2 SW Input/Output Connectors .................................................................... 2-6
Table 2–3 EXT IN Connector Pinout........................................................................... 2-7
Table 2–4 DFI Connector Pinout ................................................................................ 2-8
Table 2–5 IEEE 488.2 Connector Pinout.................................................................... 2-9
Table 2–6 Slave Connector Pinout............................................................................. 2-9
Table 2–7 Input Currents for 3-Phase Input Power .................................................. 2-11
Table 2–8 Single-Phase Input Configurations .......................................................... 2-11
Table 2–9 Recommended Wire Gauge Selection Guide.......................................... 2-16
Table 3–1 Sequence Execute Menu.......................................................................... 3-20
Table 3–2 SELF-TEST Results Definitions............................................................... 3-23
Table 3–3 System External Menu............................................................................. 3-26
Table 3–4 Fault Register Bit Definitions.................................................................... 3-27
Table 3–5 Fault Description and Action (FR1).......................................................... 3-28
Table 3–6 Fault Description and Action (FR2).......................................................... 3-29
Table 3–7 Fault Description and Action (FR3).......................................................... 3-29

Contents SW 5550AE • SW 3700AE • SW 1850AE
viii Operation Manual
LIST OF FIGURES
Figure 1–1 Elgar Model SW 5550AE AC Power Source (Rack Mount Version) ........1-1
Figure 2–1 Mounting Dimensions, SmartWave Front View.........................................2-3
Figure 2–2 Mounting Dimensions, SmartWave Top and Side Views..........................2-4
Figure 2–3 SmartWave Rear Panel ............................................................................2-5
Figure 2–4 Parallel Connections ...............................................................................2-14
Figure 2–5 Sense Lead Connections for 3-Phase Output.........................................2-14
Figure 3–1 Front Panel Controls (SW 5550AE) ..........................................................3-1

Operation Manual 1-1
SECTION 1
GENERAL DESCRIPTION
1.1 Introduction
The Elgar SmartWaveTM Models SW 5550AE, SW 3700AE, and SW 1850AE use
transformerless, direct coupled amplifiers with very low, uniform output impedance.
Additionally, the controller allows for programmable output impedance and the injection
of interharmonic signals. This technology allows you to provide full agency compliant
AC mains power for testing to IEC 1000-3-2 and IEC 1000-3-3, and IEC 1000-4-13
(harmonic current emissions, voltage fluctuations/flicker, and harmonic/interharmonic
voltage).
The SmartWave has a true arbitrary waveform generator based controller capable of
creating complex waveforms with high DC content for simulating real world power
irregularities, including phase controlled sub-cycle or multi-cycle dropouts, spikes, sags,
surges, frequency excursions, plus frequency and voltage ramps (sweeps). The unit
can also generate clipped waveforms, harmonic distortion, high current inrush, and
other complex waveshapes.
Figure 1–1Elgar Model SW 5550AE AC Power Source (Rack Mount Version)

General Description SW 5550AE • SW 3700AE • SW 1850AE
1-2 Operation Manual
Programming is accomplished at the front panel or with a personal computer (PC) using
optional software. A GPIB card in the computer is also required.
A library of 25 factory-supplied waveshapes is provided in Flash Memory. Non-volatile
memory storage is available for an additional 50 user-created waveshapes.
Waveshapes from the libraries can be assigned amplitude and frequency parameters
and be stored as setups in non-volatile memory for immediate user recall. In addition,
you can create up to 1000 timed segments and link them together to form sequences
(transient programs).
The backlit graphics LCD display allows quick confirmation of waveforms when created
or edited from the front panel. Front panel BNCs provide waveform reference outputs
for oscilloscope viewing. The front panel also includes a keypad, a rotary knob, and
Help screens.
The SmartWave sources are true DC as well as AC power supplies. Up to 312 VRMS
are available in AC or AC+DC modes. Multi-phase models can be switched to single or
three-phased operation via the front panel or the GPIB.
A wide frequency range of DC or 40 Hz to 500 Hz is available for a broad array of
applications. Utilizing the latest in AC switch mode technology, the SmartWave has
less than -60 dB of noise and ripple with total harmonic distortion (THD) of <0.5% to
500 Hz. A crest factor of 4.0 provides high peak-to-RMS current capability. An optional
power factor correction (PFC) of .99 is also available.
1.2 Input Specifications
Input Power Ranges: Factory configured 187 to 264 VRMS, 3 L-L (3 wire),
or 342 to 457 VRMS, 3 L-L (4 wire). A chassis ground is also required for safety.
Input Power Factor: .6 with USA rectifier; .35 with INTL rectifier;
.99 with input PFC option.
Input Frequency Range: 47 to 63 Hz
Efficiency: 70%, minimum, at full load.
Ride Through: 3 msec, minimum; 10 msec, minimum, with PFC option.
Input Current: Maximum currents are provided in Table 2–7 and Table 2–8.
Initial Turn-on Current Surge: Limited to less than peak value listed in
Table 2–7 and Table 2–8.

SW 5550AE • SW 3700AE • SW 1850AE General Description
Operation Manual 1-3
1.3 Output Specifications: IEC Test Modes*
Calibration Interval: 1 year.
Power Factor of Load: 0 lagging to 0 leading.
AC or DC Output Voltage: 0 to 156 VRMS L-N range 1; 0 to 312 VRMS L-N range 2.
Output Current Per Phase: 16A to 115V in 156V range; 8A to 230V in 312V range
(1850 VA maximum).
Crest Factor: 3.25 (peak output current to RMS output current).
Output Frequency: DC, or 40 to 500 Hz (sine); 40 to 63 Hz (complex waveforms);
Interharmonics 16 to 3000 Hz (sine); Optional IWG*
Output Power: 1850 VA, maximum, per phase.
Total Harmonic Distortion (Full Linear Load or No Load): 0.25% maximum, 40 to
100 Hz; 0.5% maximum to 500 Hz. Typical: Less than 0.1% at 50 Hz.
AC Noise Level: >60 dB RMS below full output (sine wave, 40 to 500 Hz).
Amplitude Stability With Remote Sense: ±0.1% of full scale over 24 hours at
constant line, load and temperature.
Load Regulation: ±0.025% of full scale voltage for a full resistive load to no load (RMS
Servo Mode.)
Line Regulation (DC, or 40 to 500 Hz): ±0.025% of full scale for a ±10% input line
change.
Voltage Accuracy (No Load, IEC Test Mode): ±0.1% of range. Add ±0.1% of full
scale for "AC PLUS DC" mode. Valid for 5 to 156 VRMS and 10 to 312 VRMS at 25ºC
(77ºF), sense leads connected. Temperature coefficient less than 50 ppm/ºC.
Voltage Resolution: 0.05% of full scale.
Frequency Resolution: 0.01 Hz: 40 to 99.99 Hz
0.05 Hz: 100 to 500 Hz
Frequency Accuracy: ±0.01% at 25ºC ±0.001%/ºC.
*See Glossary of Technical Terms at the end of this section.

General Description SW 5550AE • SW 3700AE • SW 1850AE
1-4 Operation Manual
Phase Accuracy, Phase-to-Phase Balanced Linear Resistive Load:
±1º, 40 to 500 Hz.
Phase Angle Resolution: 0.1º.
Remote Output Voltage Sense: 5 VRMS total lead drop, maximum.
Output Impedance:
1850, 1 Phase, 312V Range:
Low Impedance Mode: Less than 0.07+j0.05 (at 50 Hz)
Reference Impedance Mode: (0.40+j0.25) ± 3.0% (at 50 Hz)
3700, 1 Phase, 312V Range:
Low Impedance Mode: Less than 0.05+j0.04 (at 50 Hz)
Reference Impedance Mode: (0.40+j0.25) ± 3.0% (at 50 Hz)
5550, 1 Phase, 312V Range:
Low Impedance Mode: Less than 0.03+j0.03 (at 50 Hz)
Reference Impedance Mode: (0.40+j0.25) ± 3.0% (at 50 Hz)
Low Impedance Mode meets or exceeds the requirements of IEC-1000-3-2, Annex A,
Supply Source. Valid for equipment classes A, B, C, D, and fluctuating harmonics.
Reference Impedance Mode conforms to the requirements of IEC 725.
1.4 Waveform Specifications
Waveshape Libraries: 25 factory-supplied in flash memory; storage available for up to
50 user created in non-volatile RAM.
User-Created Setups: A total of 100 steady-state waveforms, consisting of
parameters such as waveshapes from the libraries plus amplitude, frequency, phase
angle and current limit.
Sequencing/Transient Programs: 1000 user-created segments stored in non-volatile
RAM up to 100 segments per sequence. Segments include wave-shape, amplitude,
frequency, phase angle, time (from 1 msec to 7 days), and number of cycles.
MIL-STD-704 Transients: Factory-supplied sequencing program.

SW 5550AE • SW 3700AE • SW 1850AE General Description
Operation Manual 1-5
1.5 Interharmonics Waveform Generator (Optional)
Interharmonic output will be combined with Phase A, B, and C outputs. Phase Outputs
will be referred to as the Fundamental Output. The specifications below apply only to
Output Range 2, 312 VRMS:
Reference: IEC 1000-4-13
Low Frequency Phenomena
Frequency Range: 15 Hz to 3000 Hz
Frequency Accuracy: 0.5% of interharmonic output
Frequency Resolution: 0.05% of interharmonic programmed value
Amplitude Range: 0 to 40.0 VRMS
Amplitude Accuracy: 0.23 VRMS
Amplitude Resolution: 0.02 VRMS
1.6 Protection and Safety
Overvoltage Shutdown: Programmable for 15V to 255V peak, 156V range;
30V to 510V peak, 312V range.
Undervoltage Shutdown: Automatic, not programmable.
Programmable Current Limit Shutdown: Can be set to 1% of range;
0.5A to 16A for 156V range, 0.5A to 8A for 312V range.
Programmable Current Limit with Timed Shutdown: Can be set to 1% of range;
the timeout can be set from 100 msec to 10 sec.
Programmable Constant Current: Can be set to 1% of range;
0.5A to 16A for 156V range, 0.5A to 8A for 312V range.
For all current accuracies, ±1% of full scale, add ±1.5%/kHz above 500 Hz.
For paralleled amplifiers, add ±1%.
Temperature Coefficient: <200 ppm/ºC.
Overtemperature Shutdown: Automatic, not programmable.

General Description SW 5550AE • SW 3700AE • SW 1850AE
1-6 Operation Manual
1.7 Agency Requirements
The SmartWave is designed to meet the following agency requirements:
UL 3111
CUL 1010
EN 61010
EN 50081-2
EN 50082-1
IEC 1000-3-2, Annex A, Supply Source
IEC 725 Reference Impedance
IEC 801-2, -3 and -4
IEC 1000-4-13, Interharmonics Waveform Generator
FCC Part 15, Class A
1.8 Physical Specifications (All Models)
Height: 8.75" (222 mm)
Width: 19" (483 mm)
Depth: 23.5" (597 mm)
Weight: SW 5550AE: 126.5 lbs. (57.2 kg)
SW 3700AE: 100.5 lbs. (45.6 kg)
SW 1850AE: 73 lbs. (33.1 kg)
Cooling: Air is drawn in from the top and sides, and exhausted through the rear of the
chassis. 200 CFM is required for specified operation.
1.9 Environmental Data
Operating Temperature: 0°C to 45°C (32°F to 113°F).
Note temperature measured at air inlet of SW. If cabinet mounted, cabinet inlet air may
be rated at lower maximum temperature due to warming of inlet air.
Storage Temperature: -40°C to 70°C (-40°F to 158°F).
Humidity (Non-condensing): 0 to 80% at 31°C (88°F);
derate to 50% at 40°C (104°F).
Altitude: Operating: 10,000 ft. (3,048 m); non-operating: 40,000 ft. (12,192 m).

SW 5550AE • SW 3700AE • SW 1850AE General Description
Operation Manual 1-7
1.10 Other Standard Features
1- to 3-Phase Programmable
IEEE 488.2 Interface
SCPI Protocol
Waveform Trigger Output
(1 Meg Load Drive; positive edge is at 0° ±30 s, 0 to 5V logic)
BNC Outputs for Waveform Viewing
(1 Meg Load Drive, 1.25 VRMS = Full Scale)
SYNC OUT. User programmed for:
Cycle Start, all cycles
Segment Start. all segments
Segment Start, selected segments
For loads 2 k : Vout 1V Low State; Vout 2.4V High State; Negative edge is
at 0° ±30 s.
CLOCK/LOCK
CLOCK pulses at programmed frequency for loads 2 k Vout 1V Low State;
Vout 2.4V High State. Negative edge is at 0° ±30 s.
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. Negative edge
is at 0° ±30 s.
PLL Specifications
External PLL input frequency range is 45.00 Hz to 500.00 Hz.
Tracking range is ±10% of programmed PLL center frequency.
External PLL input duty cycle is 50% ±10%.
External PLL input slew rate is .02% of input frequency/second, maximum, which
produces a maximum phase shift of 5° from the external PLL input falling edge to
the output rising edge.
The rising edge of the output will be locked to the falling edge of the external PLL
input and will have less than a 30 sec propagation delay.
Maximum output jitter when locked is <1% of external PLL input period.
PLL lock is achieved in <5 seconds.

General Description SW 5550AE • SW 3700AE • SW 1850AE
1-8 Operation Manual
External Amplitude Modulation
0 to 5 VRMS provides 0 to 20% output amplitude modulation
(±2% of full scale output).
External Direct Input
Normal Amplifier, 0 to 5 VRMS (DC to 500 Hz) or ±5 VDC input for zero to full
scale programmed voltage output (±2% of full scale output).
External Gain Control
0 to ±7.07 VDC provides zero to full scale programmed voltage output
(±2% of full scale output).
External Input Impedance
30 k .
System Firmware
System firmware is stored in flash memory. This makes it possible to upgrade
the firmware without disassembling or returning the unit.
1.11 Options
Parallelable For Additional Power above 5550A VA
External Waveform Creation Software
Input Power Factor Correction to 0.99
Interharmonics Waveform Generator
5V and 26V, 26VA Auxiliary AC outputs for 115V input, 350-450 Hz.

SW 5550AE • SW 3700AE • SW 1850AE General Description
Operation Manual 1-9
1.12 Glossary of Technical Terms
1.12.1 IEC Test Modes
The SWAE product line is designed as a supply source for IEC testing. The power ON
defaults to the low impedance mode, 50 Hz, 312V range. On the System External
menu, this corresponds to the LOW FREQ menu item set to ON. To select the
reference impedance mode, set both LOW FREQ and FLICKER to ON.
Output impedance (and load regulation) are defined by the particular mode selected.
Refer to Section 1.3, Output Impedance, for more information.
The SWAE output voltage is calibrated at no load. Under load, the output voltage is
modified by (ILOAD) (ZOUT).
Low impedance mode is used for IEC 1000-3-2 current harmonics testing, as well as
general testing. Reference impedance mode is used for IEC 1000-3-3 voltage
fluctuations and flicker testing.
1.12.2 Interharmonic Waveform Generator (IWG)
The IWG is used for IEC 1000-4-13, interharmonic voltage immunity testing. A user-
specified amplitude and frequency is summed to the main output.
SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE.

General Description SW 5550AE • SW 3700AE • SW 1850AE
1-10 Operation Manual
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