Talk to an Engineer
Logo_Caltest_Instruments_RGB

More results...

Generic selectors
Exact matches only
Search in title
Search in content
Post Type Selectors
Home | Products | Regenerative AC/DC Electronic Load  | ELZ
×

ELZ Series

ELZ Regenerative AC/DC E-Load with PHIL 30kVA to 1.1+ MVA

Buy / Rent
Datasheet

The ELZ Series is regenerative 4-Quatrant Electronic Load with an optional PHIL interface capability. Designed to simulate real world AC/DC linear or non-linear load with Regenerative capability.  

The ELZ’s single cabinet offers 30kVA, 45kVA, or 55kVA/kW and units can be paralleled up three-Phase High Power Systems  of 1.1+MW based on your requirements. 

ELZ platform is optimized for Power-Hardware-in-Loop PHIL, with three powerful DSPs for controls and measurements to cover advanced applications.

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 Features

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

Full-4-Quadrant-Operation-for-Leading-Lagging-Power-Flows

4 Quadrant Operation for Leading & Lagging Power Flows

The ELZ Series supports testing PV inverters, V2G, EV Chargers, EVSE, batteries, UPS, and AC/DC power supplies. A key advantage of the ELZ Regenerative Load is its ability to operate in all four quadrants using programmable phase shift in CC or CS modes. Compared to 2-Quadrant non-regenerative AC loads, the ELZ allows simulation of inductive and capacitive loads to fully test AC power sources, as shown in the leading and lagging power factor examples.

Simulate Real World Load 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 single or three phase
  • DC Modes: Constant Current, Constant Power, Constant Resistance, Constant Voltage, CR+CC
  • Additional CE Mode
caltest AGX Highest Current Available on the Market​

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.

Industries best Latency for Power Hardware in the Loop (PHIL)

ELZ offers Real-time Power Hardware in the Loop (PHIL) simulation using high speed set of Analog inputs and outputs with fast output response. The High-speed Analog I/O interface is used for controlling frequency, voltage or current and waveshape.

PHIL applications include real time simulation of power plants, electric vehicles, and renewable energy generation and its effect on the utility grid. AZX offers industries best latency of less than 50uS.

  • High Power Amplifier for PHIL applications
  • Latency of less than 50µs
caltest AGX Simplify Testing with Smart Control, Built-In​

SmartSource Suite Remote Control Platform

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

  • Access on any web browser in real-time, no need for installing of drivers or software
  • Real time Scope, Data logging and Power Analysis tools
  • Enhanced visualization and reporting tools with
  • Pre-written Test sequence for Aerospace, Defence, EV, Grid Standards etc.
  • Access on any web browser in real-time
  • Enhanced visualization and reporting tools
  • View and control on multiple windows
  • Save time and increase productivity

Built-in Advance Digital Scope and Measurement

Advance scope function captures voltage and current time domain signals, perfectly synchronized to the output frequency. Voltage and current displayed with accurate phase relationship. Display output waveforms on the front panel or in the Web browser.

The built-in Measurement eliminates the need for an external power analyzer by measuring voltage and current harmonics. Harmonics information is displayed in either bar charts or detailed table format for easy viewing and analysis. Data is displayed for each phase or all three phase simultaneously.

  • Access on any web browser in real-time
  • Enhanced visualization and reporting tools
  • View and control on multiple windows
  • Save time and increase productivity
Built-in Advance Digital Scope and Measurement - ELZ

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

FAQ

The ELZ is Regenerative 4-Quadrant AC & DC Load Simulator is designed to emulate real-world normal and abnormal load conditions for testing a wide range of AC or DC power generating or conversion equipment and is optimized for PHIL. The ELZ’s high-power provides 30kVA/ kW up to 55kVA/kW in a single cabinet and can parallel up to 550kVA/kW. Three-Phase High Power System configurations are available up to 1.155MW+

It is only electronic load.

An electronic load mode is optimised for precise load emulation and dynamic current control. ELZ simulates AC and DC loads for testing PV inverters, V2G, EV Chargers, EVSE, batteries, UPS, and AC/DC power supplies. Fully operate in all four quadrants using programmable phase shift in CC or CS modes.

This allows simulation of inductive and capacitive loads to fully test AC power sources

The RLS Series is used in:

  • EV Charger Load Testing, On Board Chargers (OBC), Wallboxes, V2G, V2H, V2X, and EV Charging Cables
  • Solar PV/Grid-Tied Inverters RLC Loading for Anti-Islanding
  • Energy Storage Systems (ESS), Home ESS Load Testing
  • UPS Products and PDUs AC Load Testing
  • EV Battery Discharge Testing
  • Power Hardware in the Loop (PHIL) Simulations
  • Aerospace Power and Converter Testing
  • Utility Power Quality and Grid Usage
  • Burn-In Testing

The AZX Load mode offers following four main operating modes with both RMS and Real-time modes as well as a rich set of features in each mode.

  1. Constant Current (CC)
  2. Constant Resistance (CR)
  3. Constant Power (CP)
  4. Circuit Emulation (CE)

Programmable phase shift between input voltage and load current allows for ±1 or 0 Power Factor control. Refer manual for more information Single Phase, Low Power Source

Quick Links:

Industries:

Contact:

CALTEST INSTRUMENTS PVT LTD

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

info@caltestindia.com
+919845007602

Subscribe to Newsletter
  • © 2026 Caltest Instruments Pvt. Ltd
  • Sitemap