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Enhanced Voltage Optimisation up to 2 MVA, reduce energy consumption by reducing the LV supply voltage.

Enhanced Voltage Optimisation up to 2 MVA, reduce energy consumption by reducing the LV supply voltage.

Modbus Plus
  • Features

    VO Calculator

    The EVO and control unit provides one of the simplest and most effective means to reduce energy consumption by reducing the LV supply voltage within your installation. In addition, it is also able to provide voltage control where the normal low voltage supply exhibits unacceptable variations using dynamic control.  This is achieved by using electronics which enable voltage reduction and boost.  With very low losses and very high reliability, voltage optimisation delivers energy consumption reduction in an efficient and reliable way. Any use of voltage optimisation technology should be supported by a thorough installation analysis (in order to ensure the correct application solution) using the highly recommended  IPMVP (International Performances Measurement & Verification Protocol)


    • High purity cold-wound copper sheeting, low-inertia flaked silicon-steel core. Dry type.
    • 3 Phase 3 wire: 3 wire in, 3 wire out, no neutral connection required
    • Input voltage: 400V +/- 10%
    • Input/output frequency: 50/60 Hz
    • IP Rating: IP41
    • Rating kVA: 70 kVA to 2000 kVA
    • Insulation class: IEC 726 Class H (180°C)
    • Colour: RAL 7035
    • Cooling: Natural air ventilation
    • Mounting: Floor mounting
    • Peak efficiency: 99.94%
    • Insulation class: IEC 726 Class H (180°C)
    • Three-phase Surge Arrester Type 3 According To: EN 61643-11 and IEC 61643-1
    • Voltage Withstand: 3kV 1 minute
    • Environment Operating Range:  -10ºC to +50ºC
    • Environment Humidity Range:  30% to 90%
    • Overload ability: 150% for 8 hours
    • Estimated lifetime: 50 years
    • Product warranty: 15 Years (Optimiser) 3 Years (AVC)
    • Electrical withstand: Up to 50 kA 1 sec
    • Short Circuit Withstand: Up to 50 kA conditional
    • Microcontroller: ARM7TDMI-S based high-performance 32-bit RISC Microcontroller
    • USB Memory Stick: 8GB 100+ years of data storage
    • BMS Volt free – Fail Safe Alarm
    • Colour touch screen to fully control and monitor the AVC


    • AVC Response Time, between 1 and 2 μs
    • Passive Phase Voltage Balancing
    • Automatic Voltage Bypass
    • Ready to install 
    • 100% factory tested before delivery 
    • Typical energy savings 6 – 20% 
    • Associated protection, metering, monitoring and communications 
    • Anticipated 50 year lifetime
    • Product warranty 15 years
    • Improves power quality: Energy saving, CO2 saving, cost saving, reduced maintenance 
    • IPMVP performance evaluated


    • All building types
    • LV distribution voltage > 230V
    • Annual consumption > 500,000 kWh
    • Electricity price > 7p/kWh
    • Containing a high proportion of motor and lighting loads
    • Having a fluctuating LV supply voltage 
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