Industrıal Inverter

Industrial Inverter systems are used for rugged environments and designed particularly to safeguard critical loads in industrial applications. An galvanically isolationed transformer is used to isolate load from input supply. Otherwise, voltage transients, created by degraded mains supply, can seriously damage both inverter and the critical load.


The inverter converts DC voltage into pure sinusoidal AC voltage with constant amplitude and stable frequency. The unit works with an IGBT inverter bridge with PWM (pulse width modulation) having high efficiency in the partial load range as well as achieving a low distortion factor at non-linear load. Inverter output encompasses 6 IGBT modules, boosting the instant power capacity of the inverter by double fold with comparison to regular systems. This feature allows the inverter to handle higher capacity loads (inrush currents) with smaller capacity devices. In addition, switching at high frequency – 16KHz – keeps the output sin wave (THD) undistorted providing reliable solutions for nonlinear loads. On LCD panel all measurement values, real time base events and failures can be viewed and communicate remotely with RS485 port.

In the event of mains interruption or failure, the battery connected to the DC input feeds the load automatically and without interruption. If the battery discharge limit is exceeded, the inverter automatically turns off and a warning is given shortly before the discharged voltage limit is reached. Automatic change-over of the load to the bypass mains or a suitable spare supply occurs if the supply from the inverter falls outside the preset tolerances.

Having mono-phase and three-phase alternatives PMI Inverter systems are ideal for off-grid solar applications, wind turbine systems and for specific requirements ofmission-critical processes where there is a need for reliable AC/DC conversion

-IGBT (PWM) controlled inverter with high frequency switching to ensure no waveform distortion for reactive and nonlinear loads.

-Galvanically isolated output (inverter transformer is standard, bypass transformer is optional) for maximum safety on critical loads

-Thyristor controlled static bypass to ensure uninterrupted transfer between inverter and bypass source

– Communication (Free alarm contacts, remote PC monitoring, Modbus, SNMP, Profibus, DNP 3.0 via RS 232, RS 485, USB or Ethernet TCP/IP ports)

  • Manual Bypass with 3 positions
  • LC Filter for DC Input
  • Electronic Over / Under Voltage, Over Current and Short Circuit Protections
  • Parallel Redundant Operation (Optional)
  • Internal Over Temperature protection
  • LCD Panel with Mimic Diagram and LED Indication
  • Event History for all Electrical values and failures
  • 8 units Free Alarm Contacts
ModelINV Series
Topology Online DC/AC Inverter System with Output Isolation Transformer
Control Microprocessor Controlled System
TopologyFull Bridge High Frequency IGBT Inverter Modules (3 Phase / 1 Phase)
Isolation TransformerGalvanically Isolated (standard)
Power Factor0.8
Nominal Input Voltage 110 VDC / 125 VDC / 144 VDC / 220 VDC / 264 VDC / 360 VDC +/-15%
Nominal Output Voltage110 VAC / 220 VAC / 230 VAC / 240 VAC / 380 VAC / 400 VAC / 415 VAC / 480 VAC
Voltage Tolerance
static± 1%
dynamic with 100% load change± 10% in 50 msec.
Between 100% – 125%10 min.
Between %125 – 150%1 min.
Between %150 – 300%1 sec.
Waveform Pure Sinusoidal
Total harmonic Distortion (ThDv)
at Linear Load< 3%
at Non-Linear Load< 7%
Crest Factor 3 : 1 (1 second)
Nominal Output Frequency
while synchronized with the line50hz/ 60hz ±2%
while not synchronized with the line50hz/ 60hz ± 0.1%
Switching Frequency16KHz
Short-circuit behaviour: 3 x Nominal Output Current
Protection Short Circuit Protection, Over Voltage Protection, Under Voltage Protection, Over Current Protection and Over Temperature Protection
Front Panel IndicatiorsInverter not Synchronized, Inverter DC Input High/Low, Bypass Out of Limit, Battery Fuse OFF, Bypass MCB OFF, DC Input MCB OFF, Inverter Overload, Internal Overtemperature, Inverter Failure, IGBT SCR Fuse Failure, Bypass Overtemperature Failure, Inverter Output High / Low, Inverter Overtemperature
Front Panel Set MenusUPS Mode (UPS, ECO, Bypass Inhibit), DC Cut off, Low Battery Level, Output Voltage Adjustment, Set Output Frequency, Auto Start ON/OFF, Date, Alarm Sound ON/OFF, Password
Front Panel Monitoring MenusInverter Frequency, Inverter Output Voltage (per phase), Inverter/Bypass load percentage, Bypass Frequency, Bypass Voltage (per phase), Internal Temperature, DC Bus Voltage
Alarm Contacts (1 Open 1 Closed)Inverter Failure, Overtemperature, Load on Bypass / Inverter, Inverter not Synchronized, DC Input Low /High, Battery Fuse OFF, Bypass out of Limit, Inverter Overload
Overall Inverter Efficiency (at full load)>85% / >90% depending on DC Bus Voltage
Communication (OPTIONAL)RS 485 / RS 232 / Ethernet Ports, Remote PC Control, Modbus, Profibus, SNMP, DNP 3.0 Protocols and TCP/IP options
Paralleling (OPTIONAL)Parallel Redundancy
Topology Uninterruptible static switch with back-feed protection
Bypass System No break semiconductor thyristor – thyristor
Isolation Transformer (OPTIONAL)Galvanically Isolated
Nominal Frequency 50Hz / 60Hz ± 2%
Inverter/Bypass transfer time
Inverter failureMax. 5 msec.
Overload or manual transfer0 msec.
Bypass/Inverter transfer time 0 msec.
Efficiency >99%
Topology Make before break mechanical switch with locking system (OPTIONAL:External By-Pass Switch)
Over Voltage Protection IEEE 587 4500 A, 110 Joules (standard) / 40kA Surge Arrestor (OPTIONAL)
Electrical Interference Reduction FCC Part 15 Class B
Electrical StandardsIEC 62040-3 (Performance), EN 50091-1 (Security) / EN 50091-2 (EMC)
Protection Level / Color IP 20 / RAL 7035 (Standard), (Higher IP rating and different colors are available, please consult)
MTBF 100,000 hrs. (w/out battery group)
Enclosure Material Mild Steel, Zinc-phosphate coated; 100 µm electrostatic paint; 1.5 mm thickness
Cooling Forced Fan (Standard) / Natural (OPTIONAL)
Cable Entry Bottom (Standard) / Top (OPTIONAL)
Heater & LightningOPTIONAL
Operating Temperature -10 / +40 °C. (Higher operating temperatures are available, please consult)
Relative humidity 5 – 90 %
Operating Altitude Max. 1000 Mt. (Higher altitudes requires de-rating, please consult )
Noise Level Max. 60 db

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