5kVA 3 Phase Grid Connected Inverter


The 5kVA Inverter is a Grid-Connected Active Rectifier/VSI that interfaces directly with a 400-415VAC line-line, nominal 50-60Hz, 3 phase grid.

It is compatible with any DC Source that generates up to 700V DC, such as the 5kW DC-DC Module in CPT's product range.

The system is non-isolated and handles all start up and synchronisation processes, as per the AS4777 standard. Available in a Safety Model (pictured) which includes a front panel ESTOP button.

External communications is supported via either an isolated RS485 MODBUS interface or an isolated USB 2.0 Full Speed (12Mbits/Second) compatible port.

    Technical Features

    • Integrated IGBT based three-phase (VSI) Inverter Module - Semikron SKiiP 24AC12T4V1
    • AC Current Regulation (includes 3rd, 5th, 7th, 11th and 13th harmonics)
    • Automatic Grid Connect(Synchronisation)/Disconnect
    • Advanced Ability to ride through transients
    • Advanced Synchronisation Algorithms
    • Maintain Synchronisation During Grid Brown Outs
    • Supports both Grid Connected and Standalone Operation (Mode Select)
    • LCL Filter Structure
    • DC Link Voltage Regulation
    • Galvanic Isolation between External Communication and Power Circuitry
    • Fan Forced Cooling
    • 19" Modular 3U packaging
    • All Power Connections safely at Module's rear
    • Isolated RS485 MODBUS interface - external MODBUS control compatible
    • Comprehensive Inverter Registers
    • 3 Level Security Protection of Inverter Parameters
    • USB 2.0 Full Speed Serial Port
    • Provision for Data Recording
    • Auto-restart on Fault Elimination

    In-built Protection

    • Input and Output Over Current Detection
    • Output Short-Circuit Protection, including I²t equivalent programmable limits
    • DC Under & Over Voltage Detection
    • Grid Frequency Detection
    • Internal Contactor(s) Failure
    • Communications Failure (RS485 mode)
    • ESTOP (Emergency Stop) Clean Contact Input
    • ESTOP (Parallel Input) Front Panel Button (Safety Model Only)
    • Phase Loss Detection (Single Phasing)
    • DC Bus to AC Voltage imbalance
    • Power Stage Gate Fault Detection
    • Reverse Polarity (DC)
    • Brown Out Ride-through
    • Power Stage Active Temperature Monitoring
    • Synchronisation Ruggedness

    Four Operating Modes

    • Open Loop Modulation (OL)
    • Current Regulated – Passive Load (CL)
    • Current Regulated into a Grid/Microgrid (CG)
    • Constant DC Bus Voltage with Grid/Microgrid connected (VG)

    Inverter Front Panel


    Technical Specifications

DC Bus Voltage 550 - 750 V (supports down to 150 V, Modes: OL, CL Only)
Grid (AC) Voltage 340 - 477 Vrms, 3 Phase
(400 V +/- 15%, 415 V +/- 15%)
Power Rating 5 kVA maximum
Frequency 45 - 65 Hz
Power Factor Control Fully Controllable (pf=0 to pf=1), Leading and Lagging
Switching Frequency 20 kHz
Inverter Efficiency >98%
Control Power 85 - 265 VAC (45 - 65 Hz), with On/Off Control Switch
Communications MODBUS - RS485 (rear panel)
USB 2.0 (front panel)
Construction 19" Rack 3U - Modular
Dimensions (mm) L: 650 mm
W: 483 mm
H: 133 mm
Weight 14.6 kg
Cooling Medium  Forced Air Cooling
Protection ESTOP Clean Contact (+ Front Panel ESTOP on Safety Mode)
4mm Shrouded Banana Plug Power Stage Connections (Rear) (see picture below)
Front Panel Status LEDs 5kVA_LED
Operating Temp. Range -5°C to 55°C
IP Rating 20
Humidity 5% - 95% non-condensing

    Inverter Rear Panel