Gresham Power (Salisbury, UK) announced a new family of dc/ac inverters for telecomm applications. Employing inherently low-noise and high-reliability technology, the company expects systems builders to find many uses for the product to provide high-quality mains power from 48Vdc powered systems. The new Quasar inverters may be used in telecomm infrastructure; vehicle and mobile systems; security/power protection installations; and as a low-cost, high-quality frequency converter for test systems.
Three models are now available, rated at 250VA, 500VA and 1,000VA with nominal input voltages of either 48Vdc or 24Vdc. The ac outputs are user-selectable between 110Vac, 220Vac, 230VAc and 240Vac at either 50Hz or 60Hz. A 400Hz output model is available to special order. The output waveform is a true sinewave with less than 5% total harmonic distortion and the output is protected against short circuit and overload. The input is protected against reverse-voltage connection and features automatic shutdown at low input voltage to protect supply batteries from damaging complete discharge. The Quasar inverter has internal fan cooling, thermal protection and operates over the temperature range 0°C to +50°C. Load regulation is typically 1% for a 0% to 100% load change and reliability is calculated at 90,000 hours per MIL-HDBK-217E.
