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Current limiter guards against current in-rush problems

The ED-16 Current Limiter

Markets

06 Apr 2006

A new current limiter module, designed to reduce the current surge when loads such as transformers (especially toroidal types), switch-mode power supplies or small motors are first switched on, has just been introduced by REO UK Ltd. Key features are said to be compactness and high efficiency.

The ED1/16 module eliminates problems such as blowing of fuses and nuisance tripping of breakers due to momentary, excessive current draw by the load, during start-up. The ED1/16 is suitable for applications where initial current in-rush might be up to 7-10 times nominal across frequencies ranging from 45 to 65Hz.

A semiconductor is used to reduce the supply voltage level for the first few mains cycles (approximately 500ms in duration) and then afterwards the semiconductor is by-passed allowing the voltage to rise to its nominal mains level. The unit has a nominal current rating of 16A.

Installation is very simple; the module clips onto a standard DIN rail and has screw terminals for series connection with the load. Dimensions are: approximately 10cm x 8cm footprint x 8cm high.

The unit was first developed for use with medical transformers that are also produced by REO

http://www.reo.co.uk/ed_116_switch-on_current_limiter

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