Precise Resonance Simulation:

Capable of automatically or manually matching R, L, and C parameters based on the output power of the inverter. It adjusts the load Quality Factor (Q-value) to meet standard requirements (e.g., Q=1), simulating realistic load resonance conditions.

Anti-Islanding Protection Verification:

Complies with grid-connection standards such as GB/T 19964, IEEE 1547, and VDE-AR-N 4105. It validates the tripping time of the inverter during grid power loss, ensuring the safety of grid maintenance personnel.

Automated Testing Workflow:

When paired with host computer software, it enables automatic execution of loading,resonance point adjustment, parameter logging, and report generation, significantly improving detection efficiency.

Independent RLC Precision Control

Three-Phase Independent Adjustment: The resistive, inductive, and capacitive loads for Phases A, B, and C can be independently engaged and adjusted. This supports the simulation of anti-islanding effects under both threephase balanced and unbalanced load conditions.

High-Resolution Stepping: The minimum stepping increment can reach 0.01 kW / 0.01 kvar, allowing for extremely fine approximation of the resonance point, strictly satisfying the stringent load matching requirements

of testing standards.

Versatile Mode Combination: Supports loading in purely resistive, purely inductive, purely capacitive, or mixed modes. The power factor can be arbitrarily set within the range of -1 to +1.

Intuitive Resonance Point Display

Direct Panel Readout: The control panel directly displays the numerical values of Inductive Current and Capacitive

Current for all three phases. Users do not need additional calculations; they can simply observe whether the

inductive current equals the capacitive current (i.e., the resonance point) to quickly complete loading settings.

Resonance Status Indication: The device features a resonance status indicator to help on-site testing personnel

rapidly determine if the load is currently in the optimal resonant state.

Intelligent Protection and Thermal Management

Multiple Protection Mechanisms: Equipped with comprehensive protection features including over-temperature,over-voltage/under-voltage, fan failure, and short-circuit protection, ensuring the safety of both personnel and equipment during testing.

Forced Air Cooling Design: Adopts an optimized air duct structure (e.g., top-air exhaust designed for high-humidity and salt-spray environments), making it suitable for the harsh outdoor environments typical of PV power stations.

Long-Life Components: Utilizes proprietary dry-type alloy resistors and low-loss inductors. These components offer high power density, excellent thermal stability, no visible red-hot state (safe operation), and an extended service life.

Comprehensive Data Measurement and Analysis

High-Precision Metering: Measurement accuracy for voltage, current, active power, and reactive power is as high as ±0.5% (up to ±0.2% for specific models).

Harmonic Analysis: Features a built-in high-precision sampling module supporting analysis of harmonic content up to the 50th order, evaluating the output power quality of the inverter.

Transient Capture: Includes waveform recording capabilities to capture voltage/current waveforms during the moment of grid connection, allowing for analysis of the inverter's grid-connected inrush current.