Re: Thermal Fuse, Transformer
- From: Eeyore <rabbitsfriendsandrelations@xxxxxxxxxxx>
- Date: Mon, 24 Nov 2008 14:49:39 +0000
GregS wrote:
Stevie D <steve.dumouchel@xxxxxxxxxxxx> wrote:
I've a question as to which value 'fuse' to use in series with the
primary winding of this Technics amplifier of which the original one
opened-up. I bought two today and will wait to hear from this group
before I proceed. I've purchased a 171 degrees f and a 189 degrees f .
I suspect I might be a little off maybe, maybe too high??? I cannot
remove the original one to verify. Any help is appreciated, thank-you.
Cheers, Steve
Just bypass it. If it overheated correct the possible problem by installing a fan.
You can still use a thermal fuse. Its unknown why they melted, but
probably from hitting them too hard. Most transformers
opperate and you are able to touch them, so use a fuse no higher than 130 degrees,
thats on the outside of the case. Your not going to be able to get
inside the windings very far. I don't know todays standards. Does every transformer require a fuse,
or only those underdesigned.
Every transformer needs to be protected from a short on the output. Small transformers may have such high DC winding resistance
that differentiating between a shorted output and normal operation (especially switch-on surge) is very difficult, so using a
'normal fuse' is tricky. Hence the thermal fuse.
Graham
.
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- From: Stevie D
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