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Anonymous Poster #1

Difference Between SFU & FSU

04/05/2012 1:43 AM

What is the difference between Switch Fuse unit(SFU) and Fuse Switch unit(FSU).What is the working principle of the both SFU &FSU?
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kvsridhar
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Location: Bangalore, India
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#1

Re: SFU&FSU

04/05/2012 1:57 AM

Here it is. For what it is worth. Obsolete now.

The moving fuse is not preferred any longer. For quite some time, 'quad-break' Fuse combination units have been prevalent, in which the fuse is completely isolated by 4 breaks.

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electricalexpert65
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Join Date: Oct 2009
Posts: 1884
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#2

Re: Difference Between SFU & FSU

04/05/2012 11:17 AM

To add to what Mr. KVS has excellently depicted pictorially, I shall add the following few words.

Switch Fuse Unit (SFU): In this unit, the switch is seperate and the fuse is installed external to the switch. The fuse is stationery.

Fuse Switch Unit (FSU): In this fuse is part of the Switch. The fuses are moving and the moving fuse performs the switching action.
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soebfatehi
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Join Date: Jun 2009
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#3

Re: Difference Between SFU & FSU

04/05/2012 11:25 PM

refer iec 60947
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electricalexpert65
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Posts: 1884
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#4
In reply to #3

Re: Difference Between SFU & FSU

04/06/2012 10:06 AM

IEC 60947-Part 3 to be more precise?
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