Regenerative Electronic Load – ELZ Series

High Power Regenerative AC/DC Load up to 440kW

The ELZ Series is Regenerative Electronic Load with an optional PHIL interface capability. This powerful load is designed for simulating any linear or non-linear AC or DC load. The ELZ series’ high power density supports 30kVA/kW up to 55kVA/kW in a single cabinet and can parallel up to 440kVA/kW.

Regenerative 4 Quadrant Load
Optimized for PHIL Applications (Option H)
30kVA / kW, 45kVA / kW, 55kVA / kW; Parallel cabinets up to 440kVA / kW
AC, DC input capability
Single, split, three-phase, multi-channel configuration
Dual Constant Power Voltage Range:
– AC Voltage Ranges: 5~225Vac and 5~440Vac
– DC Voltage Ranges: 0~335Vdc and 0~650Vdc
Frequency range 15Hz-1000Hz
Regenerative power > 90%, SiC technology
Galvanic isolation from facility AC input to output and between output phases / channel

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Emulate AC and DC Load Applications and Optional PHIL Interface

The Regenerative Electronic Load with PHIL – ELZ Series is based off of the core architecture of the AZX Series (video featured). This comprehensive platform is optimized for PHIL, has three powerful DSPs to cover advanced applications, and eliminates the need for add-on equipment. Simulate almost any power disturbance and distorted waveforms. Regenerative power allows sourcing and sinking of current up to 100% of rated power.

Test applications: Simulating the load for testing aerospace power converters, utility grid, closed-loop microgrids simulation, EV chargers, wall boxes, Vehicle-to-Grid (V2G), Vehicle-to-Home (V2H), Solar PV/grid-tied inverters, home energy storage systems, UPS, PDUs, test laboratories, and more.

Dual Voltage Range to Simulate Wide Range of Load Types

The ELZ Series regenerative load supports both low and high voltage ranges for AC or DC. Accurately simulate load conditions with programmable transition of voltage ranges. The constant power voltage range for both higher current at lower voltage and higher voltages at lower currents.

Mobile-friendly, parallelable cabinets make it easy for set up and reconfiguration.

Increase power when needed to meet future test requirements.
Reduced downtime for paralleled cabinet configurations. Modularity increases up time during service and maintenance of individual cabinets.
Top air-cooled vents allow the units to be placed against a wall or back-to-back to maximize floor space.

Power Hardware-in-the-Loop High-Speed Analog I/O

The ELZ Series provides integrated test system design with a standard suite of analog and digital I/O functions. The user can assign command macros or setting parameters to analog or digital I/O pins as needed. This provides a unique level of customization for putting together sophisticated test stations.

While analog inputs and outputs are standard on all ELZ modes, for real-time Power Hardware in the Loop (HIL) load simulation applications, the ELZ offers an optional high speed set of analog inputs and outputs with fast response. By adding the H Option, the ELZ can be used as a real-time load for PHIL Applications. This analog interface provides high speed input for controlling frequency, voltage or current and waveshape.

Ultra-Flexibility for Simulating Real-World Loading Conditions

Simultaneous AC and DC operation of modes per phase (or channel), and the automatic switching of input modes provides test engineers the highest degree of flexibility. AC, DC input configurations are available in single, split, three phase and multi-channels with optional isolated neutrals in AC and DC.

Full galvanic isolation from facility AC input to load input and between input phases/channels also protects the user and the UUT.

Easily Generate Harmonics & Inter-Harmonic Waveforms

The Regenerative Electronic Load – ELZ Series has a built-in waveform digitizer and scope with fast transient capabilities at 100us time resolution supporting LIST, PULSE and STEP modes. Waveform generation includes ten Standard, Sine, Square, Triangle, Clipped and Harmonics (and Inter-harmonics option).

Fully Test AC or DC Power with 4 Quadrant Load

Models Table

	Model	Rated Power (W/VA)	Input Form	Input Volts (Vac/Vdc)	Amps/Phs (Aac/Adc)	AC Input	Units/Height	Weight (Kg/Lbs)
Cabinet Systems

	3300ELZ	30000	1,2,3 Ø	440 VLN / ±650 Vdc 225VLN / ±335 Vdc	45Arms/ 30Adc 90Arms / 60Adc	3Ø	1 / 60″	517/1140
	3450ELZ	45000	1,2,3 Ø	440 VLN / ±650 Vdc 225VLN / ±335 Vdc	65Arms/ 40Adc 110Arms / 80Adc	3Ø	1 / 60″	517/1140
	3550ELZ	55000	1,2,3 Ø	440 VLN / ±650 Vdc 225VLN / ±335 Vdc	75Arms/ 50Adc 130Arms / 100Adc	3Ø	1 / 60″	517/1140
	3900ELZ	90000	1,2,3 Ø	440 VLN / ±650 Vdc 225VLN / ±335 Vdc	130Arms/ 80Adc 220Arms / 160Adc	3Ø	2 / 60″	1034/2280
	31100ELZ	110000	1,2,3 Ø	440 VLN / ±650 Vdc 225VLN / ±335 Vdc	150Arms/ 100Adc 260Arms / 200Adc	3Ø	2 / 60″	1034/2280
	31650ELZ	165000	1,2,3 Ø	440 VLN / ±650 Vdc 225VLN / ±335 Vdc	225Arms/ 150Adc 390Arms / 300Adc	3Ø	3 / 60″	1551/3420
	32200ELZ	220000	1,2,3 Ø	440 VLN / ±650 Vdc 225VLN / ±335 Vdc	300Arms/ 200Adc 520Arms / 400Adc	3Ø	4 / 60″	2068/4560

Note: In Split Phase mode, rated power is 30kVA/30kW for 3300GSZ, 33kVA for 3450GSZ & 36.7 kVA for 3550GSZ Models.

NOTES

Key Features

Available Models in 30kVA, 45kVA, 55kVA. Parallel cabinets up to 440kVA. Contact us for higher power.
4 Quadrant AC/DC Electronic Load
High-Speed analog I/O controls for PHIL application support (Option H)
Regenerative Power > 90%; Source and Sink full Power and Current
AC Mode, DC Mode
DC, 15 to 1000 Hz Frequency Ranges
Dual Constant Power mode AC Voltage Ranges 5~225V L-N and 5~440V L-N
Galvanic Isolation from Facility AC Input to Load Input and Between Input Phases / Channels
Precision True-RMS metering of Volts, Amps, Power, VA, Power Factor and Crest Factor
Waveform capture scope function for voltage and current
Harmonic (Inter-harmonics Option)
Extensive Analog and Digital I/O for ATE and system integration
Top air-cooled vent design allows cabinets to be placed back to back or against a wall to maximize floorspace.

1, 2 or 3 Phase Selectable Input from front panel or bus command
Sine, Square, Triangle, THD and Arbitrary waveforms
Up to 0-440 VAC Direct Coupled Voltage Input
3 Phase AC Grid input with Active PFC, selectable input voltage
200 stored programs for both static and dynamic Transient Testing
LIST, PULSE and STEP Transient Modes
Continuous Self Calibration (CSC)
Standard RS-232, USB, GPIB and Ethernet Interface with SCPI compatibility
IVI Instruments drivers
CE (EMC/Safety) Marked
Special 2 or 3 independent inputs settable to different modes (Voltage or Current Source or ELoad)
SmartSource Suite control with embedded web server via LAN/Ethernet or USB

Design Provides Total Control of AC and DC Power

All ELZ Series power source models are equipped with a digitally Programmable Controller.
Total control of the Load mode, phase mode (form) is available from the front panel or the bus.
All operating functions may be controlled from either the front panel or from a remote RS-232, USB, LAN, ModBus TCP (Option) or GPIB interface.
IVI Compliant Instrument Drivers are available.

ELZ Series Operating Features

Continuous Self Calibration:

Provides for exceptional regulation of the AC or DC output Voltage. When enabled, accuracy improves to ±0.02% referenced to the power source internal voltmeter.

Waveform Library:

Up to 200 different waveforms can be stored in the waveform library for execution as part of a steady state program or for substitution in any input phase as part of a transient test program. Memory location #1 is a non-editable high resolution sine wave. Locations 2-200 are editable and can be substituted in any output phase. An unlimited number of waveforms may be stored on external memory using the available PPSC Manager Windows software.

Time Based Transients:

Create and execute transients that occur over a specified time segment to modify the load current waveform, voltage, and frequency for any or all phases. LIST, PULSE and STEP Transient modes are supported. An output trigger is provided for synchronizing external test equipment to the actual transient event.

Cycle Based Transients:

Create and execute transients that substitute a waveform in any or all phases for 1 to 100 cycles. The waveform being substituted can be selected and/or modified from the waveform library.

Solutions

Electronic Load

Regenerative Loads save cost by reducing electricity use and heat generation. They also allow testing of higher power EUTs as most of the power sent to the ELZ load is regenerated back on the grid so the test lab power feed only has to cover the losses of the test equipment used and the EUT.

Supported Load Modes are Constant Current (CC), Constant Resistive (CR), Constant Power (CP) and Circuit Emulation (CE). Voltage, power and current ranges remain the same as in Voltage Source or Current Source modes.

Multiple, Easy to Use Control Options

The ELZ Series controller offers both manual and full programmable control. Front panel operation is menu driven using a combination of direct access menu keys to the left of the large color display, five soft keys located on the right of the display as well as a color touch screen. The rotary knob can be used to scroll through menu fields and doubles as an ENTER key. The same knob allows for slewing of parameters. A full decimal keypad is provided as well for direct parameter entry. The ELZ can also be operated remotely from one of its included remote interfaces. Using the SmartSource Suite embedded web server, easily operate and control the test system from a web browser via LAN or USB.

Specs

Power Source Specifications

Input Frequency:

DC, 15 to 1000Hz.

Phase Input Modes:

Single (1), Split (2) and Three Phase (3)

DC Voltage Range:

Low Range: 0 ~ ±335 Vdc Constant Power Mode High Range: 0 ~ ±650 Vdc Constant Power Mode

Input Modes:

AC, DC

AC Voltage Ranges:

Low Range: 5~ 225 Vrms L-N / 5-390Vrms L-L Constant Power Mode High Range: 5 ~ 440 Vrms L-N /5-760Vrms L-L Constant Power Mode

Mechanical Specifications

All ELZ models are cabinet systems with rear panel terminal blocks for AC Grid input and AC or DC Input connections. Cabinets are on lockable casters so they can be moved around easily if needed.

Form Factor:

Floor standing cabinet on casters.

Height /Depth:

Approximately 60/ 32 inches

Width:

24 inches per cabinet.

Cooling:

Front forced air intake with top exhaust. Automatic Fan Speed Control for low acoustic noise and extended fan life.

Expanding the AC Power Source into an Automated Test System

Pacific’s line of Smartsource® Electronic Loads enable engineers to easily automate their testing by using industry standard software development environments. The ELZ series offers standard Ethernet/LAN connectivity, a browser interface, LXI compliance (LAN extensions for Instruments) to ensure inter operability with other LXI instruments and IVI (Interchangeable Virtual Instrument) driver to speed up ATE test program development.

Photos

ELZ Regenerative Load

ELZ Parallel System

Available Transient Programming Modes

Programmable Load Power Factor from -1 to +1

Load Circuit Emulation Modes

Play Video about AZX Series Regenerative AC DC Source

AZX Series Overview Video (ELZ is based off of the same core architecture)

Brochures & Manuals

Product Brochure:

Download brochure to review product details.

Technical and Application Assistance:

Pacific Power Source’s seasoned sales and service team is here to help via chat, email or call 1-800-854-2433 or +1-949-251-1800.

Regenerative AC & DC Power Source AZX Series

Regenerative AC & DC Power Source AGX Series

Programmable AC & DC Source AFX Series

Low Power AC Power Source LSX Series

Linear AC Power Source LMX Series

Programmable AC Power Source ADF Series

AC Power Converter MS Series

Regenerative AC & DC Power Source AZX Series

Regenerative AC & DC Power Source AGX Series

Programmable AC & DC Source AFX Series

Regenerative Grid Simulator RGS Series

Regenerative Grid Simulator with PHIL – GSZ Series

Regenerative AC/DC Load Simulator RLS Series

Regenerative Electronic Load – ELZ Series

EMC Test Systems

EPTS Options

SmartSource Suite Remote Control Platform

PPSC Manager

Regenerative Electronic Load – ELZ Series

High Power Regenerative AC/DC Load up to 440kW

Emulate AC and DC Load Applications and Optional PHIL Interface

Dual Voltage Range to Simulate Wide Range of Load Types

Power Hardware-in-the-Loop High-Speed Analog I/O

Ultra-Flexibility for Simulating Real-World Loading Conditions

Easily Generate Harmonics & Inter-Harmonic Waveforms

Fully Test AC or DC Power with 4 Quadrant Load

Models Table

NOTES

Key Features

Design Provides Total Control of AC and DC Power

ELZ Series Operating Features

Continuous Self Calibration:

Waveform Library:

Time Based Transients:

Cycle Based Transients:

Solutions

Electronic Load

Multiple, Easy to Use Control Options

Specs

Power Source Specifications

Input Frequency:

Phase Input Modes:

DC Voltage Range:

Input Modes:

AC Voltage Ranges:

Mechanical Specifications

Form Factor:

Height /Depth:

Width:

Cooling:

Expanding the AC Power Source into an Automated Test System

Photos

ELZ Regenerative Load

ELZ Parallel System

Available Transient Programming Modes

Programmable Load Power Factor from -1 to +1

Load Circuit Emulation Modes

AZX Series Overview Video (ELZ is based off of the same core architecture)

Brochures & Manuals

Product Brochure:

Technical and Application Assistance: