ELZ – CalTest

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ELZ Series

High Power Regenerative AC & DC Load, 30kVA to 1.1MVA

The ELZ Series is a regenerative electronic load equipped with an optional PHIL interface, enabling accurate emulation of both linear and non-linear AC and DC loads. It delivers up to 55 kVA within a single cabinet and can be scaled up to 550 kVA in parallel configurations, with three-phase systems reaching beyond 1.1 MW. Powered by three high-performance DSPs, the ELZ Series offers advanced loading capabilities, including precise circuit emulation, making it a robust solution for complex testing requirements.

Power:

Up to 1.1MW+

Voltage:

Dual Range

Frequency:

Up to 1,000Hz

Why Choose ELZ Series

Regenerative Power

4 Quadrant AC & DC Load > 90% Energy Efficiency

Widest Operating Envelope

Dual voltage range and high current availability within a single product

Highest Performance

3DSP RTC Controllers for advanced load capabilities; includes Circuit Emulation

Low Latency PHIL

Power Hardware in the Loop with <50µs latency for real-time simulation

Key Specifications

Single, Split, Three-Phase
30kVA, 45kVA, or 55kVA per cabinet
Modular, scalable power up to 550kVA
High Power Three-Phase Systems up to 1.155kVA
Full power in AC and DC
Dual Voltage Range: 5-220Vac L-N / 9-380V L-L and 5-440Vac L-N / 9-760V-LL
15Hz-1000Hz; Extended Mode 1 – 10,000Hz
Regenerative > 90% Efficiency
Full Galvanic Isolation protects users and units under test
Precision True-RMS metering
Advanced Oscilloscope Function
Sine, Square, Triangle, THD and Arbitrary waveforms
Programmable Output Impedance (R+L); Resistive -10 to +10 Ohm, Inductive 0 to 2mH

AC Modes: Constant Current, Constant Power & Apparent Power, Constant Resistance, Constant Voltage, CC+CR, CC/CS Rectifier Mode 1ø & 3ø
DC Modes: Constant Current, Constant Power, Constant Resistance, Constant Voltage, CR+CC
Circuit Emulation Mode eliminates the need for additional equipment
3-phase AC input with Active PFC
200 programs for transient testing (List, pulse, and Step Modes)
Special inrush current application transient programming
Precision Voltage Programming – 0.02% with Continuous Self-Calibration (CSC)
Extensive Analog and Digital I/O for system integration
RS-232, USB, Modbus, TCP, GPIB, SCPI compatibility; IVI Instrument Drivers
CE (EMC/Safety) Marked
Built-In SmartSource Suite Remote Control Platform

Highest Performance AC Load with DC Capability

Regenerative 4 Quadrant Load for Leading and Lagging

Perform complete AC and DC power testing with true bidirectional, 4-quadrant operation. This programmable AC/DC electronic load supports full 4-quadrant capability, enabling precise control of real and reactive power while allowing adjustment of power factor, current crest factor, current waveform, and more.

Several Emulation Load Modes Including Circuit Emulation

Regenerative AC/DC Electronic Load capability with both AC and DC operating modes pushes the boundaries of your test environment. Simulate linear and non-linear loads (including rectified), inductive and capacitive loads.

AC Modes: Constant Current, Constant Power & Apparent Power, Constant Resistance, Constant Voltage, CC+CR, CC / CS Rectifier Mode 1ø & 3ø
DC Modes: Constant Current, Constant Power, Constant Resistance, Constant Voltage, CR+CC
Additional CE Mode

Most Flexible Input Configuration for AC/DC Load Simulation

Simultaneous AC and DC load operation is supported per phase (or channel), with automatic input mode switching to give test engineers maximum flexibility. Configurations include single-phase, split-phase, three-phase, and multi-channel setups, with optional isolated neutrals available for both AC and DC.

AC, DC configurations
Simultaneously test AC and DC, on separate phases
Full galvanic isolation from facility AC input to output and between
phases/channels also protects the user and the UUT.

Power Hardware in the Loop with High Speed Analog I/O (Option H)

The ELZ is optimized for real-time Power Hardware-in-the-Loop (HIL) simulation. Its high-speed analog inputs and outputs deliver rapid response for precise control of frequency, voltage, current, and waveform. At the same time, voltage and current feedback signals are captured and returned to the real-time simulation system, ensuring accurate closed-loop operation.

Amplifier for PHIL applications
Latency of less than 50µs
High Speed Analog Inputs

Simplify Testing with Smart Control, Built-In

Get access to SmartSource Suite, our proprietary built-in platform that allows full remote control, development, and execution of test sequences in real-time. Intelligently monitor, control, and manage testing using the intuitive embedded web browser interface on any mobile device.

Access on any web browser in real-time
Enhanced visualization and reporting tools
View and control on multiple windows
Save time and increase productivity

Featured Webinar

Fundamentals of AC Loads Webinar On-Demand

Cabinet Systems

Model	Rated Power (W/VA)	Input Form	Input Volts (Vac/Vdc)	Amps/Phs (Aac/Adc)	AC Input	Units/Height	Weight (Kg/Lbs)	CTA
3300ELZ	30000	1,2,3 Ø	480 VLN / ±680 Vdc 220 VLN / ±340 Vdc	45 Arms / 30 Adc 90 Arms / 60 Adc	3Ø	1 / 60"	517 / 1140	Buy / Rent
3450ELZ	45000	1,2,3 Ø	480 VLN / ±680 Vdc 220 VLN / ±340 Vdc	65 Arms / 40 Adc 110 Arms / 80 Adc	3Ø	1 / 60"	517 / 1140	Buy / Rent
3550ELZ	55000	1,2,3 Ø	480 VLN / ±680 Vdc 220 VLN / ±340 Vdc	75 Arms / 50 Adc 130 Arms / 100 Adc	3Ø	1 / 60"	517 / 1140	Buy / Rent
3900ELZ	90000	1,2,3 Ø	480 VLN / ±680 Vdc 220 VLN / ±340 Vdc	130 Arms / 80 Adc 220 Arms / 160 Adc	3Ø	2 / 60"	1034 / 2280	Buy / Rent
31100ELZ	110000	1,2,3 Ø	480 VLN / ±680 Vdc 220 VLN / ±340 Vdc	150 Arms / 100 Adc 260 Arms / 200 Adc	3Ø	2 / 60"	1034 / 2280	Buy / Rent
31650ELZ	165000	1,2,3 Ø	480 VLN / ±680 Vdc 220 VLN / ±340 Vdc	225 Arms / 150 Adc 390 Arms / 300 Adc	3Ø	3 / 60"	1551 / 3420	Buy / Rent
32200ELZ	220000	1,2,3 Ø	480 VLN / ±680 Vdc 220 VLN / ±340 Vdc	300 Arms / 200 Adc 520 Arms / 400 Adc	3Ø	4 / 60"	2068 / 4560	Buy / Rent

Notes

In Split Phase mode, rated power is 30kVA/30kW for 3300AZX, 33kVA for 3450AZX & 36.7 kVA for 3550AZX Models.
For applications requiring more than 220kVA/kW up to 1.1MW+, contact Pacific Power Source for details.
Three phase input voltage settings: 380 to 400VAC±10% or 480VAC±10%.

Title

Document Type

ELZ Series Regenerative AC & DC Load Datasheet

Datasheet

ELZ Series Regenerative AC & DC Load Manual

Manual

Burn-In Testing Using Regenerative Electronic Loads Application Note

App Note

AC Loads for Linear and Non-Linear Circuit Emulation

App Note

Regenerative Loads Operating Modes Overview

App Note