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Thread: I'm bored & old contactor switch
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12th Oct 2014, 07:42 PM #1Golden Member
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I'm bored & old contactor switch
"Are we there yet?" I'm bored already with this sitting around. For those who don't know I had my second dose (in 5 weeks) of surgery on Friday and received another 3 stents. First op was to repair 2 crushed stents from previous ops. A week or so later another heart artery began to get crushed until it collapsed. Home next day; 20 years ago it was a death sentence.
Anyway; took another stroll over to the shed this afternoon for my version of cardiac rehab. Hopefully attached is a pic of an old magnetic contactor switch. It may well have come out of the 'ark'. Actually was removed from my 1954 or so Macson shaper and replaced with a modern type. The old one chattered more than my wife but when physically bridged worked as designed. May well not be compatible with the rotary phase convertor. The new one slams in and sounds like a car crash.
Is it of any use to someone? otherwise I will donate it to land fill.
That's all folks; I am back off to be bored.
Ken
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12th Oct 2014, 07:54 PM #2Most Valued Member
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Hi ken you got a pic of the shaper. Just out of interest?
I got a macson shaper and although i have no use for the contactor I would like to work out the approx age of my shaper.
Heres a pic a 2 more contactors just for giggles!
I doubt they would chatter as much as my wife!
Cheers
SimonGirl, I don't wanna know about your mild-mannered alter ego or anything like that." I mean, you tell me you're, uh, super-mega-ultra-lightning babe? That's all right with me. I'm good. I'm good.
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12th Oct 2014, 07:54 PM #3Senior Member
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Chin up thoughts with you
Hang in there mate, rough roads smooth out.
Cheers
Bruce
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12th Oct 2014, 08:03 PM #4Most Valued Member
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12th Oct 2014, 08:21 PM #5.
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Stay bored for a bit longer Ken.
Your heart and your health are the prime concern, the other stuff can wait.
Bob.
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12th Oct 2014, 08:27 PM #6Golden Member
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Thanks for the well wishes.
I don't know whether to believe you or not Simon; you just want my 'treasure'.
As to the Macson. let the search feature be your friend. I got over the boredom for a while and started through the "show us your shaper thread"' #179 and #240.
The numbers are stamped on the top of the gearbox near the selectors. I think it was RC who posted an old MacPhersons catalogue from the 50's displaying the same unit.
Ken
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12th Oct 2014, 08:38 PM #7
All the best Toggy keep on ticking
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12th Oct 2014, 08:38 PM #8
Hang in there Ken, seems to me that boredom beats the alternative.
Doesn't seem much fun being dead
Amazing what they can do with those stents these days, DAMHIKT.
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14th Oct 2014, 07:12 AM #9Most Valued Member
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Girl, I don't wanna know about your mild-mannered alter ego or anything like that." I mean, you tell me you're, uh, super-mega-ultra-lightning babe? That's all right with me. I'm good. I'm good.
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18th Oct 2014, 08:03 AM #10
I am confused. Is that the photo of the stent?
Civilized man is the only animal clever enough to manufacture its own food,
and the only animal stupid enough to eat it.
Barry Groves
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6th Jun 2015, 08:31 PM #11Golden Member
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So much for the new contactor switch. It's toast.
I have only used the shaper in small bursts since having the magnetic contactor switch replaced with a new unit (marked for use on 11kw motor; I have a 2.2kw.)
It got a bit bigger workout today on a light duty job. I could smell a very hot plastic smell that has not been apparent before. Opened the electrics box to be met with smoke rising out of the new contactor. Luckily the job was finished. The the outer plastic case of the contactor was too hot to keep your hand on; but the temperature breaker switch attached to it was cool as.
I wonder if the insulation in the windings of the old 3hp 3ph motor are breaking down? Motor runs OK and does not trip the breaker switch on the RPC. The motor is marked as 4.26amps per line and has not shut down the RPC with any excessive current draw.
The D.I.L. is kidding at this very moment; so will be away for a few days. I will dissect the contactor switch when I get back. The switch did not drop out so the 240V coil must still be OK.
Ken
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7th Jun 2015, 12:39 AM #12Diamond Member
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Congratulations Grandpa, I hope that all has gone well with the D.I.L. and I hope that your health quickly returns to normal. That magnetic contactor looks very similar to a 3 phase contactor my father had on our pump when I was a kid. The middle phase is missing on yours, but they were a very reliable switch. Years later a sparky retired next door, and he said that they were very common in industry, and you could renew the silver contacts with a thruppence if needed, he had done that numerous times rather than wait to get the genuine replacement. Dear old Eugene said that they would last forever, but the arrival of decimal currency and the removal of silver from our coinage has changed the situation somewhat. If you end up sending it to the tip, you ought remove the silver contacts first.
I've just had a thought, perhaps you could change the coil to a DC setup and incorporate a small stepdown transformer and bridge rectifier to cut the 50Hz hum, if your new contactors don't work out. Just wondering if a loose terminal was the culprit in toasting that one also. All the best,
Rob
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8th Jun 2015, 02:06 AM #13Senior Member
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The old contactor is an AD40, we used heaps of them when I was an apprentice.(shows how old I am)
They were only fitted with 2 overload heaters, the theory was that if there was an overload on the non heater phase, it would in turn
create suffient excess current in the other phases to trip the contactor, not very precise, but they were very robust.Regards
Bradford
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8th Jun 2015, 02:48 AM #14
You should come and pay us a visit, you can be bored over here instead of over there.
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9th Jun 2015, 12:21 AM #15Diamond Member
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Many thanks for that Bradford, AD40 does ring a bell, I was just a kid when my dad had to get the motor on our Ajax A3 pump rewound after a brown-out. The original switch was just that, no motor protection at all, and he had the new magnetic contractor installed. I was far too young to have any involvement, and assumed that all three phases had overload heaters. I lost my dad nearly ten years ago, though my mum still lives on the place she and dad bought in 1955, when I was 5. I'm not sure if that ad40 still does duty there or not as my youngest brother is a sparky and the Ajax has been replaced with a centrifugal pump and the motor has also been changed. I do remember though one great advantage the AD 40 had for us was when the tank began to overflow, we no longer had to run the 250 metres to switch the pump off, we could just briefly switch it off at the meter box at the house, and when we switched it back on again at the meter box, the magnetic contractor did its thing and leaving the motor off, but ready to be started next time after we had re primed the line to the foot valve. Thanks for reminding me of those times long ago,
Rob.