Regenerative Electronic Load – ELZ Series

High Power Regenerative AC/DC Load up to 440kW

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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.
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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.

AZX Power Amplifier Power Hardware in the Loop - PHIL 2

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.  

Flexible AC DC Input Configurations

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).

Regenerative AC Power Source Program Transients

Fully Test AC or DC Power with 4 Quadrant Load

4 Quadrant AC DC Regenerative Load - Lagging Current

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

Design Provides Total Control of AC and DC Power

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

Regenerative AC Source with PHIL - AZX Series Front View

ELZ Regenerative Load

AGX Regen AC-DC Source Triple Cabinets

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: