The PSI 300 Series of rugged dc-ac inverters employ microprocessor controlled high frequency PWM technology to deliver 300VA pure sine wave output voltage. Full encapsulation with a thermally conductive MIL-grade silicon rubber compound ensures immunity to high levels of shock and vibration, as well as moisture, insects and airborne contaminants. The units are rated for continuous operation at +70°C with installation on an appropriate size of heat-sinking surface. They are suitable for powering sensitive electronic loads in mining, transportation, oil rigs and other severe environments.
The PSI 300 inverters provide a stable sine wave output of 115Vac continuous at 60Hz or 400Hz, or 230Vac continuous at 50Hz. They operate from a 24V, 48V, 110V or 125Vdc line voltage. Output regulation is ±2% combined across all input line and load conditions. The input and output are filtered for low noise. The input meets EN55022 Class A conducted and radiated requirements with wide margins. An output-fail alarm (Form C) and remote shutdown or enable are available as options. Efficiency at full load is typically 80%, depending on input voltage. Remote shutdown or enable are available on custom versions. An optional Form C output fail alarm can be provided.
The PSI 300 inverters are equipped with comprehensive protection circuitry including inrush current limiting, reverse-polarity protection, input/output isolation, output current limiting with short-circuit protection and thermal shutdown with automatic reset in case of insufficient cooling. The units meet C22.2 No. 107.1 - 01, UL 458 and EN/UL60950-1 and equivalent industrial safety standards.
