Sinusoid wave PWM digital inverter 1Ph or 3Ph

INV

One line Diagram

Main features:
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The AUNILEC INV series offers a range of one- and threephase inverters with IGBT power conversion bridge.
The system has been designed to continuously supply
extra-low harmonics AC current to critical loads. The
integrated static switch can automatically perform quick
switching operations on the DC line, in case of black-out
only, to substantially increase the global efficiency; it can
also perform an ON-LINE conversion, in which the wave
form is always generated by the inverter, thus ensuring a
stable, undistorted waveform.
In this case the load is switched to the emergency line
only in case of inverter failure.
The fast control system and the high-frequency PWM
technology allow to connect the inverter to non-linear
loads with a very low waveform distortion.
The graphical display allows to show an easy to
understand one-line diagram displaying the current status
of the inverter and of the static switch, thus providing an
accurate overview of the alarms and measurements.

Clean and stable output AC with THD <2%.
Redundant fan system with temperature and air flow control.
By-pass static switch.
Line Interactive mode efficiency >98%; on-line mode: >93%.
Manual by-pass switch, allowing to perform maintenance
operations without disconnecting the load.
Possibility to supply a non-linear load with minimum distortion
thanks to the high-frequency IGBT technology.
Fuse protection on both the inverter and the emergency line, with
burnt fuse identification and automatic insertion on the functional
branch.
Wide range of input voltages.
Digital microprocessor control (DSP + PLD).
Full optical isolation on all the logic and interface cards.
Certified to operate in the harshest environment conditions.
Overload capacity: 150% for 1 minute, 110% for 2 hours.
Shortcircuit-proof architecture.
Modbus communication interface through RS232 or RS485 port.
Ethernet connectivity.

Parallel and hot
stand-by systems
To ensure the power supply continuity, AUNILEC adopts
two solutions: HOT STAND-BY and N+1 redundancy.
The hot stand-by mode uses two identical inverters and
powers the load with one of them, while the other is active
and synchronised with the mains, ready to intervene in no
time should the first machine fail.
The N+1 redundancy solution uses multiple inverters
connected in parallel, always on and running, dividing the
current load among them; the whole system is designed to
ensure load powering even in case of inverter failure.
Should the failure involve more than one inverter, the load
is switched anyway to the emergency line without any
power supply interruption.