Stick-man
Well-known member
I purchased a Westinghouse GFN323N 100A safety switch for use on my welder. However, it is new old stock, and doesn't come with fuses. Can anyone tell me what fuses I will need to get? Thank you
Anyone knowledgable in 100A safety switch fuses?
- Thread starter Stick-man
- Start date
quick google search shows that as only a switch, no over current protection.
micromind
Well-known member
Does it have clips for fuses?
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Look again .....it has 2 fuses in the schematic and the text discusses fuses.quick google search shows that as only a switch, no over current protection.
^^^ me bad.
grounded-b
Well-known member
You could use 250V - 70A, 80A, 90A or 100A fuses ( Bussman FRN would work ). You could also use lower amperage fuses, with adapters ( but I wouldn't go that route )
micromind
Well-known member
Which fuse to use depends on what the fuse is for. There are about 50,000,000 different types.....lol.
Simply put, if the load will not exceed the fuse rating, a fast-acting one will work (type NON is one example) This is the least expensive one but if the load has a high inrush current, it'll blow without a reason.
If the load will exceed the fuse rating for a short time (like a motor starting, for example), then you'll need a dual-element time delay type (like the FRN mentioned above). These fuses are quite a bit more $$$ than the basic fast-acting type but they are designed to ride through a short time high current event.
Simply put, if the load will not exceed the fuse rating, a fast-acting one will work (type NON is one example) This is the least expensive one but if the load has a high inrush current, it'll blow without a reason.
If the load will exceed the fuse rating for a short time (like a motor starting, for example), then you'll need a dual-element time delay type (like the FRN mentioned above). These fuses are quite a bit more $$$ than the basic fast-acting type but they are designed to ride through a short time high current event.
OP shows from Tennessee
Lack of reading comprehension on my part, I thought it was yours.
They will be for welders. I am going to end up with four switches, for the following-
Miller Shopmaster 300 - Transformer
Lincoln V350Pro - Inverter
Lincoln Tig 300/300 - Transformer
Lincoln Idealarc 250 - Transformer
I didn't think of it, I should have called Bussman. But I enjoy the forums anyway.
micromind
Well-known member
You'll need the dual element time delay fuses. If you stick the rod with the fast acting type, they'll see it as an overload and blow.