Inverter Test Load Bank

GROADA-AC380V-30KW-RCD inverter load bank

★★★★★
Main Products:
  • AC Load Bank : R / RL / RLC / RCD
  • DC Load Bank : DC5V - 2000V, 0A - 5000A


ModelAC220V-5KW-RCDAC220V-10KW-RCDAC220V-15KW-RCDAC220V-20KW-RCDAC380V-30KW-RCDAC380V-50KW-RCDAC380V-60KW-RCDAC380V-100KW-RCDAC380V-200KW-RCD
Rated powerR=5KWR=10KWR=15KWR=20KWR=30KWR=50KWR=60KWR=100KWR=200KW
RCD=5KVARCD=10KVARCD=15KVARCD=20KVARCD=30KVARCD=50KVARCD=60KVARCD=100KVARCD=200KVA
Input current0-22A0-45A0-45A0-90A0-45A0-300A0-450A0-600A0-750A
Size (width * depth * height mm)500*600*800500*600*1000500*600*1100500*750*1100600*850*1400600*850*1600600*850*1850700*1000*18001100*1400*1800
Weight50KG80KG100KG130KG200KG300KG350KG450KG550KG
Input voltageAC220/230VAC380/400V
Other input voltage can be customized according to requirements
Minimum loading100W100W100W100W100W1KW1KW1KW1KW
Other minimum loading power can be customized according to requirements
Overall accuracy3% (other accuracy requirements can be customized according to requirements)
power factorPF=0.6~1.0
peak coefficient2 to 3
Control modeLocal manual/remote host computer (local manual control mode: circuit breaker/button/touch screen three-way optional, other methods can be customized as required)
Remote InterfaceRS232/RS485/USB/RJ45/CAN/GPIB (other interface modes can be customized according to requirements)
Protection functionEmergency stop protection, over-temperature protection, fan load interlock protection, grounding protection (select over-voltage protection, over-current protection, short-circuit protection, fan overload, insufficient air volume)
Working power supplyAC220VAC220V/AC380V
Display accuracy0.5 level (other explicit precision can be customized according to requirements)
Display parametersVoltage, current, power, frequency, power factor, etc. (other explicit methods can be customized according to requirements)
Cold sure waySide air inlet and upper air outlet (other air outlet methods can be customized according to requirements)
Protection levelIP20 (other protection level can be customized according to requirements)
Appearance colorRAL7035 (other colors can be customized according to requirements)
Working temperature-10 ℃ ~ 55 ℃
Relative humidity≤95%RH
Altitude≤ 2500 m



AC-380V 30 kW RCD Inverter Load Bank — High-Precision Testing Solution

Why Choose a Dedicated Inverter Load Bank?

Inverter testing under realistic and controllable loads is essential for verifying performance, reliability, durability, and safety. A properly designed load bank allows:

  • Reproducible stress testing under full load, partial load, and transient conditions

  • Control over resistive, inductive, or combined loads simulating real-world motor or grid interactions

  • Validation of protection circuits (overcurrent, overvoltage, thermal shutdown)

  • Verification of long-term thermal stability, aging, and component degradation

Without such a load bank, inverter testing may rely solely on field conditions or motor coupling, which can obscure root cause analysis and reduce repeatability.

In fact, industry-standard test labs use both passive (resistive/inductive) and active loads (regenerative electronic loads or motor emulators) to fully stress inverters. 


Product Overview: AC 380V 30 kW RCD Load Bank

This product page presents a high-precision inverter load bank, specifically designed for AC 380 V systems, capable of handling up to 30 kW rated load. Below is an enhanced, SEO-optimized description:

Key Specifications & Features

  • Nominal Voltage: 380 V AC

  • Rated Power: 30 kW continuous

  • Load Type: RCD (Resistive + Capacitive + Inductive combinations)

  • Load Control Modes: stepwise or continuous adjustment, enabling partial load (e.g. 10 %, 25 %, 50 %, 75 %, 100 %)

  • Cooling & Thermal Management: forced-air or liquid cooling to maintain stable temperatures under full load

  • Protection Mechanisms: overcurrent, overvoltage, short-circuit, phase loss, overheating

  • Load Bank Construction: high-stability precision resistors/inductors, modular load elements

  • Measurement & Monitoring: integrated current, voltage, power, and temperature sensors; optional logging or remote communication

These features empower R&D labs, quality assurance teams, and inverter manufacturers to test inverters precisely under controlled, repeatable load conditions.


Applications & Use Cases

1. Inverter Development & Validation

During the design and prototyping phases, engineers can use this load bank to:

  • Verify full-load performance, thermal limits, and efficiency curves

  • Stress-test inverter switching components (IGBTs, MOSFETs)

  • Simulate part-load, transient, and overload scenarios

  • Validate cooling systems under real thermal load

2. Production & Quality Assurance (QA)

In mass manufacturing, this load bank can be integrated into automatic test sequences:

  • Run “burn-in” or "soak" tests to detect early-life failures 

  • Ensure each unit meets declared performance before shipping

  • Automate pass/fail criteria based on voltage, current, power, and temperature thresholds

3. Maintenance & Field Verification

After deployment (in solar farms, microgrids, industrial power systems), periodic or after-maintenance tests help:

  • Confirm the inverter still performs within specification

  • Detect degradation (e.g. diminished cooling, capacitor aging)

  • Validate protection circuits and safety margins

Testing inverters with a load bank is considered a best practice in many critical power installations to prevent unexpected failure. 


Testing Methodology: How to Use the Load Bank Correctly

Below is a recommended step-by-step workflow and key considerations:

PhaseActionsPurpose / Checks
Setup & Safety CheckInspect wiring, ensure insulation and grounding, perform open-circuit checksPrevent shorts or unsafe conditions
No-load / Idle MeasurementRun inverter unloaded, measure baseline current, voltage, harmonic distortionConfirm zero-load behavior and idle losses
Step Load RampApply incremental loads (e.g. 10 %, 25 %, 50 %, 75 %, 100 %)Assess linearity, thermal drift, current stability
Full-load Endurance / Soak TestRun at full load for extended duration (hours to days)Monitor temperature, drift, cooling effectiveness
Transient TestsIntroduce load steps, sudden load removal (load rejection), or overload transientsMeasure inverter’s dynamic response, grid-interaction behavior 
Protection VerificationDeliberately exceed ratings to trigger overcurrent, overvoltage, or thermal protectionsValidate that safety circuits engage reliably

Important Best Practices & Precautions

  • Always wear proper PPE (insulating gloves, goggles) when handling high-voltage systems.

  • Ensure the load bank and inverter are in good ventilation and clean environment (no dust accumulation).

  • Use power meters or precision instrumentation to measure input/output, so your efficiency calculations are accurate. 

  • Avoid exceeding design limits of the inverter or load bank – inconsistent or overloaded operation can damage components.

  • Record all data logs systematically for traceability and future analysis.


Differentiation & Advantages (Establishing Authority & Trust)

To support EEAT and improve trust, you may wish to include:

  • Testing data and charts (efficiency curve, thermal profiles)

  • Third-party lab certifications (e.g. IEC, UL, CE compliance)

  • Case studies or whitepapers where this or similar load banks have been used (e.g. in inverter manufacturers’ labs)

  • Technical team credentials (engineers, years in power electronics, publications)

  • Guarantees and warranty terms, e.g. accuracy drift, calibration support

Our AC 380V 30 kW RCD Inverter Load Bank is engineered by a team with over 10 years of experience in power electronics test systems. Designed for R&D, QA, and maintenance verification, it meets international accuracy and safety standards. Each unit is factory-calibrated and accompanied by a calibration certificate. We also offer custom configurations (higher power, alternate voltages, communication interfaces) to support evolving test requirements.

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