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ELZ Series

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

Buy / Rent
Datasheet

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

Watch Now

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
SmartSource Suite Brochure
Brochure

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CALTEST INSTRUMENTS PVT LTD

NMR Green Nest, Ground Floor
Hitech Defense and Aerospace Park
Bangalore North, Bandi Kodigehalli
Bangalore 562149
Karnataka

india.mktg@caltest.de
+919845007602

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