• Single-phase and selectable three-phase 208V, 230V, 380V, 400V (L-L) input

• AC, DC, and AC+DC output

• 4-Quadrant Operation

• Regenerative AC/DC source and load

• Regenerative RLC /RCD electronic load

• BiPolar DC power supply

• Single-phase/three-phase/split-phase/reversephase/ multichannel output, each phase independently controllable

• Up to 100th harmonic waveform generation

• Supports low/high voltage ride-through and continuous fault ride-through

• Programmable phase angle jump

• Current-limiting output for short-circuit testing

• TTL trigger signal output with voltage or frequency changes

• Line impedance (RL) simulation

• Fast dynamic response

• High voltage output mode

• True current source

• User-defined waveforms

• Soft-start function, suppresses inrush current

• Low leakage current (<10mA)

• Compact design (67 cm depth), suitable for desktop installation

• Modbus/SCPI communication

• Standard LAN interface

• USB interface on the front panel for file transfer Remote Sense

• Fault localization

• Remote emergency stop interface

Harmonic and inter-harmonic waveforms generation

The ZGX series utilizes a dual-DSP control architecture, delivering exceptional waveform generation capabilities that enable precise simulation of harmonics and inter-harmonics. Users can independently configure the amplitude and phase for up to the 100th harmonic relative to a 50Hz or 60Hz fundamental frequency, allowing flexible creation of various periodic distorted test waveforms. To enhance testing efficiency, the series also incorporates 30 preset harmonic distortion waveforms for quick user access, significantly streamlining the configuration process for complex test environments.

User defined waveform

The ZGX series offers a flexible userdefined waveform function, supporting highprecision import and editing of waveforms with lengths of 1024, 2048, and 4096 points. This feature provides four waveform processing modes: full, 1/4 symmetric, symmetric, and asymmetric, and enables generation of harmonic and vector waveforms based on user-defined inputs. Edited waveform data can be saved and exported at any time, facilitating subsequent invocation and sharing.

High Voltage Mode

The ZGX series offers a High Voltage Mode that doubles the output voltage range compared to standard operation. This mode utilizes the unit's reverse phase output capability, with the phase angle between two outputs set to a 180degree shift. In AC mode, it delivers 900V LN from a 450V LN range; in DC mode, it provides 1272V output based on a 636V range, meeting higher voltage testing requirements.

High Voltage Mode

The ZGX Series power supplies integrate regenerative AC and DC electronicload functionality. In AC load mode, four operating modes are provided: Constant Resistance (CR), Constant Current (CC), Constant Power (CP), and Rectification.Constant Resistance(CR)mode can simulate three-phase resistiveloads, allowing users to set resistance values for each phase individually andsupporting sequence simulation function. Constant Current (CC) and ConstantPower (CP) modes can simulate sinusoidal current loads, enabling users to setcurrent or power values and adjust the phase angle from -90° to +90° to accurately emulate the leading or lagging phase relationship between voltage andcurrent in capacitive or inductive loads. Rectification mode is suitable for nonlinear rectifier load testing, supporting parameter configuration under CC or CPmode, and allowing users to set the WF (waveform factor) parameter (range:0-2.121.CF=WF*1.414)

In DC load mode, Constant Current (CC) and Constant Power (CP) operatingmodes are supported, featuring sequence simulation function, along with configurable output impedance and minimum operating voltage.

RLC/RCD Load

The ZGX series offers advanced RLC load simulation functionality, capable of accurately simulating complex impedance loads composed of resistance (R), inductance (L), and capacitance (C), thereby realistically replicating complex load conditions. The system supports 12 classic RLC topological structures and features independent perphase programming capability, allowing R, L, and C parameters to be configured individually for each phase. Users can flexibly construct diverse load models according to testing requirements, making it suitable for a wide range of testing scenarios including three phase power supplies, renewable energy inverters, motor drives, and grid simulation.

In addition, the ZGX provides four types of RCD nonlinear load simulation functions, designed specifically for performance testing and reliability evaluation of devices such as UPS systems, inverter power supplies, and frequency converters. It enables accurate simulation of the dynamic characteristics of nonlinear loads, comprehensively verifying the response performance and stability of the equipment under test in harsh real-world operating conditions.

BiPolar DC Power Supply

The ZGX series supports bipolar DC output functionality, offering both twoport and threeport connection modes to accommodate diverse testing and application requirements.In twoport mode, users can flexibly select any two phases from the ABC threephase system as output terminals and set their voltage polarity via software. For instance, phase A can be configured as the positive voltage output and phase B as the negative voltage output. The output polarity can be easily reversed by reconfiguring phase A as negative and phase B as positive, enabling rapid polarity switching.

In threeport mode, phase A serves as the positive voltage output terminal, phase B as the negative voltage output terminal, while the neutral terminals of phases A and B are connected together to serve as the protective earth (PE). This mode supports independent setting of positive and negative output voltages, allowing for either equal or unequal magnitude outputs, thus providing enhanced flexibility in voltage configuration.

High-Speed Dynamic Output Performance                   

The ZGX series delivers excellent dynamic output performance, with a voltage slew rate up to 3V/us and a current slew rate up to 0.4A/us, making it suitable for test applications that require stringent dynamic response.

In DC voltage mode under noload conditions, both the rise time from 0 V to 636 V and the fall time from 636 V to 0 V are less than 200 μs. In current mode, the rise time from 0 A to 90% of full scale (FS) and the fall time from 90% FS to 0 A are each within 120 μs. The ZGX series is designed to meet the rigorous demands of high dynamic testing applications.

Low Leakage current

The ZGX power supply series features low leakage current. Under three-phase 220V (L-N) output conditions, the unit's ground leakage current remains below 10 mA, complying with international and domestic safety standards including IEC 60364-7-722, UL 2231, GB/T 18487.1-2023, and IEC 62752.

This characteristic makes it suitable for electric vehicle onboard charger (OBC) testing, as well as the testing and validation of various highly sensitive electrical equipment. It effectively prevents unintended tripping of RCD protection circuits, ensuring safe and stable testing operations.

Power Hardware-in-the-Loop

The ZGX series operates in four-quadrant mode with an output frequency range from DC to 1 kHz and a small-signal bandwidth of 10 kHz, featuring rapid dynamic response capabilities. An optional analog programming interface (Model: EXDA) is available, providing an output response time of less than 20 µs. Its performance meets the technical requirements for power amplifiers in Power Hardware-in-the-Loop (PHIL) testing applications, making it suitable for such scenari-os.

Power Expansion

The ZGX series supports masterslave parallel operation for power expansion. A single standard ZGX unit delivers up to 22.5 kW, and the system supports parallel connection of up to 10 units of the same model. For higher power requirements, a factory-configured, high-power system is available. Based on a single ZGX unit, this factory-integrated system offers a maximum output of 225kW per unit. Furthermore, these highpower systems also support parallel operation of up to 10 units for further expansion.

User-Friendly GUI Software

The ZGX series comes standard with a graphical user interface (GUI) software that enables remote control, programming communication, and real-time monitoring. The software provides functions including system configuration, output mode and parameter settings, data measurement, and waveform display. It also integrates test items with IEC 61000-4-11, IEC 61000-4-13, IEC 61000-4-17, and IEC 61000-4-28 standards, and supports high-voltage and lowvolt-age ride-through (HVRT/LVRT) testing.

-S     Slave Unit, only available for ZGX15 and ZGX20