Product category:
DC/AC Inverters
News Release from: Gresham Power Electronics | Subject: Quasar
Edited by the Electronicstalk Editorial
Team on 17 March 2006
Inverter expands into new applications
The Quasar inverter has a wide variety of uses over and above supplying high quality AC power from a DC source.
The Quasar inverter from Gresham Power, the Salisbury based power conversion specialist, has a wide variety of uses over and above supplying high quality AC power from a DC source The Quasar is based on Gresham's long experience of MIL systems and employs inherently low noise, high reliability technology
This article was originally published on Electronicstalk on 17 Nov 2003 at 8.00am (UK)
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The major application area for the Quasar inverter has long been telecomms and mobile phone infrastructure where systems builders have found many uses for this product to provide high quality mains power from 48V DC battery powered systems.
This mains power may then be used to supply "of the shelf" equipment such as PCs, monitors, modems, CCTV and alarm systems for remote locations and even emergency lighting.
An optional psophometric filter completes the package for eliminating noise over voice networks.
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The Quasar is equally at home in vehicle or mobile applications where the 24V DC input versions may be used to provide power for vehicle based computing, measuring or monitoring systems as well as "domestic" equipment such as TVs, microwave ovens etc.
In test laboratories the Quasar may be used as a highly stable and accurate test voltage supply as the output may be user configured to 110, 220, 230 and 240V AC at either 50 or 60Hz.
For avionic or military test systems a 400Hz output version is also available.
With it's flexible DC input the Quasar may be used in both laboratory and mobile test environments.
Three Quasar models are available, rated at 250, 500 and 1000VA with nominal input voltages of either 48 or 24V DC.
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 has internal fan cooling, thermal protection and operates over the temperature range 0 to +50C.
Load regulation is typically 1% for a 0 to 100% load change and reliability is calculated at 90,000 hours per MIL-HDBK-217E.
The Quasar inverters comply with EN60950 and EN55022-B and are designed to meet telecomms psophometric noise requirements of ETS300-132-2 when used with the optional QPF1000 filter module.
DC input connection is via stud terminals and the AC output is from screw connection strip or optional socket packs for IEC connectors or numerous international standard outlets.
The Quasar has a steel enclosure to IP20 and rack-mounting kits are available.
A remote on/off function is standard and an optional "monitor" card may be specified to provide indication of output OK, input OK, battery low, overcurrent and overtemperature.
Jake Moir, MD of Gresham comments: "The Quasar is a very versatile piece of equipment and even we don't know all the uses it has been put to".
"It can really be a problem solver for mobile applications or as part of a test system or even no-break power where a reliable DC supply is available".
"It has field proven high reliability and has been used extensively by major telecomms OEMs".
Quasar inverters may be used in telecomms infrastructure, vehicle and mobile systems, security/power protection installations and as a low cost, high quality frequency convertor for test systems or part of a no-break power/UPS system.
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