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High Speed Fuses Type question 2

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lukin1977

lukin1977

Mechanical
Jan 19, 2009
397
I am looking for 3 high speed fuses type aR . I found a local supplier of high speed fuses but fuse type gS

Does anybody knows the difference between aR and gS fuses?

WhatsApp_Image_2016-08-11_at_11.14.27_xpehb7.jpg


WhatsApp_Image_2016-08-11_at_11.08.41_p147ye.jpg


They are installed on the 3 input lines of a DC Drive
 
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The first image is a part-range backup fuse (designated by the 'a') for short-circuit protection only. The second image is a full-range fuse (designated by the 'g') for overcurrent and short-circuit protection.

From the internet -

Class aR, gR and gS
Traditionally high speed fuses have only been used for short circuit protection, another device in the circuit protects against overload. Fuses only intended for short circuit protection are called class aR. Recent technological developments have made it possible to combine both short circuit protection and overload protection into the same fuse, class gR.

Class gR and gS offer superior protection compared to class aR. Class gR/gS fuses can often direct replace class aR fuses, however a class gR/gS fuse shall never be replaced by a class aR.
Click to expand...
 
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Scotty doesn't say it explicitly, but he meant to say that you can use the Sitor fuses. SITOR BTW stands for SIlizium stromTOR, where Stromtor means "current door".

Gunnar Englund
--------------------------------------
Half full - Half empty? I don't mind. It's what in it that counts.
 
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by the way, the 3 x 200A aR fuses were "burned" because of heavy sparking on a DC motor commutator caused by a loose brush
 
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