• Configurable output power, voltage, current, and frequency ranges

• Master-slave parallel operation for system expansion

• Programmable voltage/frequency sequences via GUI with control-

• lable slew rates

• Optional DC output mode

• Built-in soft-start function to suppress inrush current

• Custom waveform output (clipped wave, rectified wave)

• Optional air-cooling or liquid-cooling configurations

Four-Quadrant Operation

The "-R" option provides four-quadrant operation, allowing for bidirectional energy flow.

Constant Power Auto-Ranging Output

The ESA Series provides configurable output power, voltage, and current ranges. It operates in a constant power mode, automatically adjusting the voltage and current output within the limits.

Grid Simulator

The ESA Series with the R option functions as a grid simulator via its fourquadrant operation, capable of compliance testing for distributed generation. Key capabilities include simulating voltage and frequency fluctuations, dips, (LVRT/HVRT), three-phase unbalance, and harmonics.

• Three-Phase Independent Output

• Programmable Voltage/Frequency/Phase Sequences Up to 50th Harmonic   Waveform Generation

• LVRT/HVRT and continuous fault ride-through Islanding Mode:

• RLC load simulation for anti-islanding testing

• Programmable Phase Angle Jumps

• Current-Limited Output Mode:Supports short-circuit testing at output terminals

• TTL Trigger Signal Output:Activates during voltage/frequency transitions

• Line lmpedance (RL) Simulation

Programmable Voltage/Frequency/Phase Sequences

The GUI allows precise programming of output parameters including voltage, frequency, slew rates, and phase angles with full independent control over all three phases.
     

Harmonic & Interharmonic Generation

The ESA Series generates harmonics up to the 50th order and supports interharmonic editing. The GUI software allows precise programming of phase angles and amplitudes, allowing for independent three-phase waveform generation.

       

High/Low Voltage Ride-through

Re-generative AC Load (-LD option) 1,2

With the -LD option, the ESA Series operates as a regenerative AC load, featuring four operational modes:

Constant Resistance (CR) Mode: Simulates three-phase resistive loads. Users can configure CR mode and set three-phase resistance parameters , enabling resistance sequence simulation.

Constant Current (CC) & Constant Power (CP) Modes: Simulate sinusoidal current loads. Users can adjust load current/power and phase angle (adjustable from90° to -90°), replicating leading/lagging voltage-current phase relationships in inductive/capacitive loads.

Rectifier Load Simulation Mode: Designed for nonlinear rectifier load testing. Users can configure CC/CP modes and set waveform parameters (e.g., Waveform Factor:0–2.121, CF=WF*1.414) .

Extends to Independent DC output (-DC option)

DC output mode is available with the -DC option. The output will be DC and AC 0~100Hz. There is up to 50% output power and current derating below 30Hz.

Line impedance (RL) Simulation (-IMP option)

-IMP option is designed to simulate line impedance by setting R and L value. The setting range is: Rmax=0.2Urated Irated； Lmax：Rmax/314

1. ESA-LD as regenerative eLoad is design for sine waveform input, if the input is not a pure sine waveform, the output current waveform could be distorted. The -LD option must be used in combination with the -R option.

2. When WF=1, the output waveform is a sine wave; when WF<1, the output waveform is a clipped wave; when WF>1, the output waveform is a rectified wave.

Custom waveform

Custom waveforms including clipped sine wave and rectified wave are available with ESA series. The waveform is programmable by modifying waveform factor.   Waveform factor (WF) refers to the ratio of the peak value of a custom waveform to that of standard sine wave. When WF=1, the output waveform is a sine wave; when WF<1, the output waveform is a clipped wave; when WF>1, the output waveform is a rectified wave.This function is available in CV mode when ESA is used as source, and also in rectifier mode when ESA is used as eLoad.

Island mode for IEC 62116 anti-island test(-62116 Option)3

Island mode of ESA simulates RLC load behavior for anti-island test. Two simulation modes are provided, which are setting parameters of PAC, QAC, PEUT and QL in mode 1, and setting R, L, C Value in mode 2.
   

Graphical User Interface

GUI software is installed in front touch panel, which uses Windows OS. The software provides following functions:

• -Output settings and limits

• -Sequence output settings

• -Generate harmonic and inter-harmonic waveforms.

• -Display measurements: voltage, current, power, etc.

• -Capture, display and save output voltage and current waveforms. -Display power source faults

3. ESA-62116 can only simulate RLC load for sine waveform, 50/60Hz input.