AI-Series Anti-Islanding Load Banks



Load banks are devices which contain resistive, inductive and/or capacitive loads, apply the load to an electrical power source and dissipate the power of the electrical source.

Unlike on-site loads, which are highly variable in terms of diverse electrical parameters, load banks provide pre-determined and controllable loads. These in turn serve the power source, using its energy output to test, support or protect.

Portable and stationary load banks incorporate as low as 1 kVAr load step increments for testing small to large generating sets. The fine control resolution ensures accurate load control and power factor targeting adjustments.

Load banks are suitable for both workshop and on-site testing and the units are suitable for trailer mounting.




  • Robust design
  • Vertical / Horizontal air release
  • ISO container or custom made enclosure design
  • Integrated remote control system with data capture, monitoring and load step controlling
  • Ease of integrated load testing with other load banks
  • Corrosion resistant outdoor type paint
  • Stainless steel vibration proof
  • High temperature class reactors on demand
  • IEC 62116, IEEE Std 929 and UL1741 compatible designs


Load banks feature optional touch-type LCD display and/or wireless remote load step switching controller and/or load step & time controller PC software. In addition, controller features include fan start/stop, electrical parameter controls, timing, capturing data, test mode and fault detection. PC controllers are connected to load bank through USB port for connection.

In addition, circuit breaker protections are provided in the load bank and easy access to switchgear compartment and reactors is achieved. In terms of safety; fan failure, low air flow, over-voltage, over temperature and phase sequence protections are included in the load bank.


Area of Usage


  • Generator testing
  • Ship Testing
  • Power Plants
  • Telecommunication Sites
  • Mining
  • Military Establishments
  • Data Centers
  • Battery Systems
  • UPS Systems
  • Inverters


Technical Features


  • DC or 50 - 60 - 400 Hz
  • Resistive ( up to 36 kV )
  • Inductive ( up to 36 kV )
  • Capacitive ( up to 36 kV )
  • Power Analyzer Measurements : V, A, W, VAr, Hz, cosPhi


Required Information for Quotation


  • Applied voltage and frequency
  • Mobile or stationary
  • Load step resolution
  • Indoor or outdoor service
  • Resistive, Inductive, Capacitive
  • Capacity (kW, kVA, kVAr)
  • Blower and control voltage
  • Internal and/or external control power
  • Meters (Voltmeter, Ammeter, kW meter, kVA meter, cosF, frequency meter)
  • Optional computer interface RS 232 / RS 485 (wireless computer interface on demand)
  • Automatic controller
  • Wireless remote control
  • Protection degree: IP20/indoor, IP20/outdoor under roof, IP55/outdoor




Load banks can be controlled via local, remote, wireless remote or automatic control systems.

Local control: Control panel self-contained in Load Bank with load control button and/or touch panel.

Remote control: PC software controlled with data cable thru a USB connection input in a location away from the physical load bank for controlling predetermined load steps, power factor, timing, capturing data, test mode and fault detection.

Wireless remote control: Load steps and main controlling function of the load bank is achieved by an ergonomic hand-held remote control.

Automatic control: DSP controller with auto control available including auto on-off, auto load regulation, timing, regenerative power response.


AI-series anti-islanding load banks containing purely resistive, inductive, or capacitive load, have segmented combination control of power input, and can simulate a variety kinds of power loads to meet the grid-connected inverter full load test requirements.

  • Up to 5000 kW and ±5000 kVAr
  • Load Step Resolution = 0.2%
  • Single / Three Phase
  • Up to 480 V (3Ø) and 275 (1Ø)
  • 50/60 Hz
  • Intelligent Control
  • R/L/C/RL/RC/RLC Configurable
  • RS232/RS485/Ethernet Communication
  • Automatic Control/Test Mode via User Interface Software
  • Remote PC Control
  • Manual Control by Switch
  • IEC62116, IEEE Std 929 and Ul1741 Compatible designs
  • Custom Designs on demand


Application Areas
  • Photovoltaic Cell Inverter Testing
  • Smart-Grid Anti-Islanding Testing
  • Micro-inverter Testing
  • UPS Testing
  • Generator Testing


  • For other ratings up to 36 kV or for other load step resolutions, consult factory.
  • Dimensions and weight may vary as per at the custom specific ratings.
  • Given dimensions and weights are approximate values.


User Friendly Auto-Control Software

The interface screen consists of five tabs and hence five windows. These are named:

  • Automatic Control
  • Manual Control
  • Stage Status
  • Stage Faults
  • System Status


In Automatic Control:

  • Enter Power Requirements Values
  • Press Evaluate
  • Click-on one of three possible alternatives for both P&Q
  • Press Apply
  • See Real-Time Values on `Measurements`



In Manual Control:

When in Manual Control, the system will switch-on the stages that are checked and switch-off the stages that are unchecked. For both Automatic Control and Manual Control, if the interface software is restarted or disconnected and reconnected; the status of the stages will not change unless:

  • Stop button on the control panel is pressed
  • Emergency stop buttons are pressed
  • There is an error in the system



Stage Status:

The Stage Status window shows the status (ON or OFF) of electronic control card outputs which drive contactors for monitoring purpose of the load stages.



Stage Faults & System Status:

There are five essential alarm signals that would be generated by the Automatic Load Bank Control System.

  • Frequency out of Range: Out of pre-specified design values
  • Over Voltage: Over pre-specified design value
  • Emergency Stop: In case of operator presses emergency button
  • Fan Pressure Error: Fan failure
  • Electronic Control System Internal Error: Control or power supply error

In case of any fault, load bank will be out of conduction until the fault is cleared by the operator.




Load banks accessories are also available here.