From: legg@nospam.magma.ca
On Tue, 09 Aug 2022 07:37:07 +0100, Charlie+ wrote:
>On Mon, 08 Aug 2022 18:15:55 -0400, legg wrote as
>underneath :
>
>>On Mon, 08 Aug 2022 20:10:56 +0100, Charlie+ wrote:
>>
>>>On Mon, 08 Aug 2022 07:49:06 +0100, Charlie+ wrote as
>>>underneath :
>>>
>>>>Advice please..
>>>>This is a 250V 1450W Circular saw US made in the 1980s probably.
>>>>AEG CS825, It failed in use yesterday blowing fuses having been stored
>>>>in a garage. Dismantle reveals a leaking swelled combined (film)
>>>>capacitor 0.3uF + 2x 2500pF XY type 250V~ with 3 leads one coloured and
>>>>2 black. Too old for spare parts.
>>>>Presumably I can replace with X rated 250v or better individual caps but
>>>>I dont know enough!
>>>>Is the 0.3 for starting and the small two for anti interferance perhaps?
>>>>TIA C+
>>>
>>>Actually it is a brushed (universal type) motor so it wont be for
>>>starting. It will all 3 capacitors be for limiting interferance but I
>>>dont know what the circuit would be. C+
>>
>>These are for line filtering - They are only really effective if the
>>line power enters and leaves the cap body on separate wires, so their
>>replacements' location anywhere near the line power exit should be
>>just as effective.
>>
>>Use an X-rated part across the line, and Y-rated parts to the grounded
>>equipment metal body, from each line terminal. Capacitance equal to or
>>less than double the listed values.
>
> RL - Thanks for the info, now I'll be able to re-create the circuit
>(the original cap. failed short circuit), though in this case the earth
>wire disappears into the motor but that is not external chassis
>connected, presumably because double insulated. Thanks, C+
If you can find any electrical contact to the disappearing third
)ground) wire, then that's the connection needed. Probably on the
body of the motor.
RL
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