Compact power supply offers true low temperature operating cabability
17 September 2010
PULS UK has introduced two MiniLine 60W DIN rail mounting power supply units in both standard and low temperature versions. As with other PULS power supplies the ML60s have been tested at temperatures of up to +60 deg C but the new low temperature model is able to start and deliver full power from -40 deg C giving an overall operating range of 100 deg C.
PULS says that although there are several manufacturers who claim their power supplies will operate at temperatures of around -25°C the problem is they can’t start at those temperatures. As most power supplies use satiable resistors to control the inrush current, with temperature drop the resistance increases and can reach a level where no current can flow and consequentially prevents the device from running.
PULS has developed special circuitry which both limits inrush current and obviates the need to use satiable resistors thereby allowing the units to operate in extreme conditions without danger. Similar technology has been incorporated in PULS power supplies used at the Neumaver Station III research base in Antarctica to power outdoor monitoring equipment, including sunshine detectors and wind measurement devices.
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