Motor start capacitor - value ?
In article ,
"harryagain" writes:
wrote in message
...
On Thursday, 10 September 2009 11:45:08 UTC+1, robert wrote:
Have acquired an old pedestal drill with a
British Houston Thompson single phase 1/4hp motor
marked KF TD3205 type BS 2408
The motor start capacitor needs replacing but it has no visible markings
on it due to several paint coatings !
With capacitor removed the motor will run with a hand start and I can
hear what I assume is a centrifugal switch clicking on spin up and spin
down.
Any advice on what size capacitor to buy and try ?
I have one of these motors and it does not appear to have a capacitor on
it . It starts but dips the lights in my workshop as it is pulling a few
amps on
start up is the capacitor internally mounted?
There are various designs, some with some with a capacitor, some without.
Induction motors inherently have poor starting torque.
The ones with a capacitor are marginally better and hence will start against
a amall load/run up to speed quicker.
Just wondering if the OP knows for sure it's a capacitor-start
motor, rather than a capacitor-run motor? The second also gives
a higher running torque, but uses higher grade capacitors.
--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]
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