[TechAssist] Re: Fusible resistors
- From: Edward Gaidies <teltek3@xxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Fri, 8 Oct 2004 20:56:57 -0400
Bil;
As far as critical safety components..would you use a 1 ohm 25 watt
resistor to protect the AC.
Would you use a 4A slow blow...When we had Power Transformers in sets,
slow blows worked well, due to breakdowns in insulation.
Notice Slo-blows are no longer around (that's the ones that use to have
the little spring in them to take +10% of surge).
There is so much on the Internet these days, research does wonders.;-)
-Ed-
*****************************************************************
Ed Gaidies
Tel-Tek Electronics
Ontario-Canada
teltek3@xxxxxxxxxxxx
teltek@xxxxxxxxx
On 8-Oct-04, at 6:08 PM, Bil Green wrote:
> But there really is a relationship between fuseable and flameproof.
> They both contain a very thin film of metal or carbon which opens
> when overheated.
>
> I realize that some film resistors with the same wattage ratings
> may open at a different temperature, but I feel a lot better using
> a film resistor in place of a fuseable than using one with a higher
> wattage rating.
>
> Yes, in extremely rare cases this practice could cause a house to
> catch fire, but I suppose it's about as likely as getting hit by a
> bus. I'm very honest with my customers, and try to get the job done
> without having to special order a 50 cent part too often.
>
>
> Bil Green
> PC 1000
> Mammoth Lakes, CA 93546
> 760-924-1000
>
> Friday, October 8, 2004, 12:47:55 PM, you wrote:
>
> JS> There is no relationship between fusible and flameproof. They have
> different
> JS> applications. Fusible has been selected to protect some circuit
> from further
> JS> damage. Flameproof is to prevent smoke and fire when damage occurs.
> JS> Jerry Silverman
> JS> Greentron Inc
> JS> 4 Newland Ave
> JS> Greenville SC 29609
> JS> Fax/Phone 864 232 3889
> JS> mail to: greentron@xxxxxxx
> JS> ----- Original Message -----
> JS> From: "Paul" <dntwntv@xxxxxxxxxxxxx>
> JS> To: <techassist@xxxxxxxxxxxxx>
> JS> Sent: Friday, October 08, 2004 2:06 PM
> JS> Subject: [TechAssist] Re: Fusible resistors
>
>
>>> Thats interesting, because I am working on a Samsung that came in
>>> with a
> JS> vertical problem per the customer. Didn't show up in the shop till
> I tapped
> JS> the board. I resoldred all the i/c pins and other relative
> components. Still
> JS> no deflection. Hit the area with freeze and got partial deflection
> JS> momentarily while a peaking coil smoked. I replaced the i/c the
> coil a
> JS> shorted zener and a lytic cap. The 5.6 ohm fusible opened also
> which I
> JS> didn't see till I fired it up again and had fold over. I replaced
> with a
> JS> flame proof. It smoked and opened up immediately. Found another
> shorted
> JS> zener. Thus the reason for the question. A fusible didn't seem to
> work any
> JS> better than a flame proof, at least in this case. Some suppliers
> use the
> JS> term fusible to mean flame proof.
>>> Paul
>>> J Silverman <greentron@xxxxxxx> wrote:
>>> No. A flame proof resistor is made of materials that wont burn or
>>> smoke
>>> excessively. That doesnt mean that it wont light up like a light bulb
> JS> while
>>> the circuit it is supposed to protect vaporizes and the resistor
>>> survives.
> JS> A
>>> fusable resistor is supposed to protect something by interrupting the
>>> current.
>>> Jerry Silverman
>>> Greentron Inc
>>> 4 Newland Ave
>>> Greenville SC 29609
>>> Fax/Phone 864 232 3889
>>> mail to: greentron@xxxxxxx
>>> ----- Original Message -----
>>> From: "Paul"
>>> To:
>>> Sent: Thursday, October 07, 2004 9:57 PM
>>> Subject: [TechAssist] Fusible resistors
>>>
>>>
>>>> Is a flame proof resistor a safe sub for a fusible resistor of the
>>>> same
>>> value?
>>>> If not why not?
>>>> Paul
>>>>
>>>> Paul ,B
>>>> Central TV&Video
>>>> 911W Grand Ave
>>>> Grover Beach Ca.
>>>> (805)481-8084
>>>>
>>>>
>>>
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>>>
>>> Paul ,B
>>> Central TV&Video
>>> 911W Grand Ave
>>> Grover Beach Ca.
>>> (805)481-8084
>>>
>>>
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>
>
> JS>
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