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SXN72 Series Regenerative Grid Simulator

The SXN72 Series uses digital PWM rectification and independent high-frequency inverter technology to provide four-quadrant operation and bidirectional power flow.

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SXN72 Series Regenerative Grid Simulator

Key Features

  • Multiple powerful output modes:
    • Balanced Three-Phase Mode: balanced three-phase voltage output
    • Three-Phase Unbalance Mode: independent phase-voltage settings with phase angles adjustable from 0.0 degrees to 359.9 degrees
    • Parallel Single-Phase Mode: three phases connected in parallel for high-power single-phase output
  • Three-phase decoupled design for comprehensive grid-abnormality simulation, including waveform distortion, grid fluctuations, and three-phase unbalance; harmonic mode supports superposition of the 2nd through 40th harmonics
  • Four-quadrant operation with energy regeneration to the grid
  • Meets the low-voltage and zero-voltage ride-through test requirements of NB/T 32004-2018, with stable operation and no load resonance at low voltage
  • Meets the high-voltage ride-through test requirements specified by applicable Chinese national standards
  • High input power factor (>=0.95) and low input current distortion (<5%)
  • Auto-Lock automatically locks the keypad after a preset interval to prevent inadvertent operation
  • 8-inch color LCD with numeric keys, function keys, and a rotary knob for convenient, flexible operation
  • Comprehensive measurement of voltage, current, peak current, frequency, active power, apparent power, power factor, voltage crest factor, and other electrical parameters
  • AI-Monitor continuously monitors internal voltage, current, temperature, and other parameters, issuing immediate alarms and service prompts when abnormal conditions occur
  • Black Box automatically records operating parameters during abnormal events for subsequent review and maintenance
  • RS232 is standard; RS485 and LAN are optional

Featured Functions

Four-Quadrant, Bidirectional, Regenerative Operation

Four-Quadrant, Bidirectional, Regenerative Operation

The SXN72 Series uses digital PWM rectifier control to absorb load-side energy and return it to the grid, reducing the need for dissipative loads in PV and energy-storage inverter testing.

Multiple Output Modes for Versatile Use

The SXN72 Series combines three-phase decoupled control with digital control algorithms to provide balanced three-phase, unbalanced three-phase, and parallel single-phase modes. One instrument therefore replaces multiple conventional AC sources.

Multiple Output Modes for Versatile Use
Multiple Programmable Modes for Comprehensive Grid-Abnormality Simulation

Multiple Programmable Modes for Comprehensive Grid-Abnormality Simulation

The SXN72 Series supports programmable staircase, step, ramp, low-voltage (including zero-voltage) ride-through, and high-voltage ride-through profiles, together with superposition of the 2nd through 40th harmonics. These functions simulate grid abnormalities and severe operating conditions for DUT testing.

Applications

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Model Selection

Product NameRegenerative Grid Simulator
ModelSXN7215-300-23SXN7215-300-45SXN7245-300-68SXN7260-300-91SXN7290-300-136
Source/Sink Capacity15kVA30kVA45kVA60kVA90kVA
Basic Functions
Output FunctionGrid Simulation
Regenerative FunctionReturns output-side energy to the AC grid
IsolationBuilt-in isolation transformer
Load Power Factor+1.0 – 1.0
Wiring ConfigurationInput: three-phase, four-wire    Output: three-phase, four-wire + PE
Output Specifications
Output ModeBalanced three-phase, unbalanced three-phase, and parallel single-phase modes
Output VoltagePhase voltage: 0.0-300.0 V    Rated voltage: 220.0 V
Voltage Setting AccuracyAccuracy: <=0.4% FS    Resolution: 0.1V
Balanced and unbalanced three-phase modes
Rated Current22.7A45.4A68.1A90.9A136.3A
Parallel Single-Phase Mode
Rated Current68.1A136.3A204.5A272.7A409.0A
Output Frequency40.00–70.00Hz
Frequency Setting AccuracyAccuracy: <=0.02%    Resolution: 0.01Hz
Frequency Stability≤0.02%
Voltage Total Harmonic Distortion (VTHD)<1% (linear load)
Three-Phase Angle120 degrees +/-2 degrees (balanced three-phase mode)
Crest Factor1.41 +/-0.1 (sine-wave mode)
Line Regulation≤1%
Load Regulation≤1%
Efficiency>85%
Measurement and Display
Display8-inch color LCD
Voltage Measurement AccuracyAccuracy: 0.2% FS + 0.2% of reading    Resolution: 0.1V
Frequency Measurement AccuracyAccuracy: 0.02%    Resolution: 0.01Hz
Current Measurement AccuracyAccuracy: 0.3% FS + 0.3% of reading    Resolution: 0.1A/1A
Power Measurement AccuracyAccuracy: 0.5% FS + 0.5% of reading    Resolution: 0.1kW/0.01kW/0.001kW
Operating Functions
Staircase Mode9,999 steps
Step Mode100 steps; up to 999,999 cycles
Ramp Mode100 steps; up to 999,999 cycles
Low-Voltage (Including Zero-Voltage) Ride-ThroughSimulates standards from multiple countries and regions; minimum response time <=20 ms
High-Voltage Ride-ThroughSimulates standards from multiple countries and regions; minimum response time <=20 ms
Waveform TypesSine wave or harmonic waveform (2nd-40th harmonic superposition)
Real-Time AdjustmentWith the output enabled in standard mode, the output voltage and frequency settings can be adjusted using the numeric keys, increment/decrement keys, or rotary knob and applied immediately.
Protection Functions
Overload Capacity105% < output <=110%: output shuts down after 600 s
110% < output <=150%: output shuts down after 60 s
150% < output <=200%: output shuts down after 2 s
Output >200%: immediate output shutdown
Hardware ProtectionOvercurrent, overload, short-circuit, and overtemperature protection; output overvoltage/undervoltage and phase-loss protection; DC-bus overvoltage/undervoltage protection; and automatic output-contactor trip protection
Software ProtectionAI-Monitor, Black Box, and Auto-Lock keypad protection
Remote Interfaces
Communication InterfaceStandard: RS232    Optional: RS485, LAN
Input Specifications
Input PhasesThree-phase, four-wire + PE
Input Voltage Range380V±57V
Input Frequency Range45–65Hz
Input Power Factor>0.97 (rated input voltage, 50%-100% of rated input current)
>0.95 (rated input voltage, 10%-50% of rated input current)
Input Current Distortion<5% (rated conditions)
Operating Environment
Operating Temperature0–40°C
Operating Humidity20%-90% RH (non-condensing)
Dimensions and Weight
Dimensions (W x H x D, mm)800 x 1800 x 8001200 x 2000 x 1000
Weight (kg)500570680750900
Note: Transient and flicker functions with 1 ms resolution are available as custom options.

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