solid state start switch

[raymond]

i have a ruff scmatic of a solid state star switch for a combi motor, just one thing i have 2 resistors on it a 100 and 470 the only thing it does not tell me is if the straight ohms of *1000(K) ohms, all the othe ones in it are *1000 eg 33K ohms, can any one help or have a better copy..

[raymond]

Re: solid state start switch

i better check my post first.. hehe
sub star for start, a for at, the for there, of for or, othe for other. i better go back to school..

[JimDorsin]

Re: solid state start switch

I am not sure the specs you are requesting, but I can recommend a much better product. It is a potential relay that you physically wire into the machine. You can purchase them through Stahls 70's (If available in your area). We get them through a local electric supply company (I don’t know if you have Granger down there) but they are manufactured by General Electric, and should be easy to find. Let me know if you are interested, and I will get you the GE model # and specs off the relay.

[Andrew]

Re: solid state start switch

If it says K in some places and not others then I assume 100 means 100 and 470 mean 470.

Also, if you're think they left out the 'K', then that would imply 100K and 470K, which sounds quite high.

So, just guessing from the numbers, I'd say 100 ohm and 470 ohm (no 'k').

But apart from just guessing with numbers, where in the circuit are these resistors?

The solid state starter would likely use some low-voltage switching circuitry based on a zener diode and controlling the triac - that might account for the 33K resisitors, etc. But it would also have to include a means to essentially measure the current in the start winding, and to power the low-voltage switching circuit. That might be done with a low ohm resistor in series with the high-voltage start circuit (though 100 ohm is too high for a start circuit - is there a current-divider type of arrangement perhaps?).

I'm just guessing.

Can you post the schematic?

Cheers,
Andrew.

[Lafarge..]

Re: solid state start switch

the stahls moter start relay is the bomb. I have a bunch on and I hope to have the rest on by the end of the summer. you can throw out all of your cent mechs and not have to worry about astator not starting.

[Clutch Plate]

Re: solid state start switch

Originally posted by lafarge:
the stahls moter start relay is the bomb. I have a bunch on and I hope to have the rest on by the end of the summer. you can throw out all of your cent mechs and not have to worry about astator not starting.

<font size="2" face="Verdana, Helvetica, sans-serif">Quality makes a very good one also. I have had to change out quite a few of the Relay style switches because of burnt contacts. The quality switch is a small P.C. board and is very reliable. 4 wires and it mounts to the outside of the stator.

[Gadget]

Re: solid state start switch

I'll dig out my gear tomorrow and have peek

[Kat]

Re: solid state start switch

Originally posted by lafarge:
the stahls moter start relay is the bomb. I have a bunch on and I hope to have the rest on by the end of the summer. you can throw out all of your cent mechs and not have to worry about astator not starting.

<font size="2" face="Verdana, Helvetica, sans-serif">Agreed. Any switch board that burns up here gets replaced with the motor start relay. Grainger #6X550. Install it and never look back.

[Dutch]

Re: solid state start switch

Raymond,

If you're looking at either the Murrey or Quality SSSS the values that are listed on the PC board are correct. Be sure to replace the 30k resistors with 1/2 watt. Don't get the 1/4 watt by mistake. Also, Those switches are finicky when it comes to the 6 diodes. Make sure you desolder them &amp; check to see if they're all the same value. As they get older the value changes &amp; it WILL effect the life &amp; performance of the switch.

[bamm]

Re: solid state start switch

I think I have the info at work if you still need it.


BAMM

[30n70]

Re: solid state start switch

Kat
any info on install of Grainger 6x550 on my 70's would be greatly appreciated. In stock...I also have old 8230's that use this part
Does the brake cicuit work OK?
Thanks

[JimDorsin]

Re: solid state start switch

Table = Remove wire from ts20 that goes to motor plug and connect to terminal 1 on relay. This will be red on a 5 wire harness and green on a 3 wire harness. Add a wire from terminal 2 on relay back to ts20. Add another wire to ts22 and run to teminal 5 on relay

Sweep = Locate the Z wire on the sweep plug. Find the terminal in the wireway it connects to. That will go on Terminal #1 on the relay. Run a new wire from termainal 2 back to where you removed the z wire. Add a wire to where ever y connects in the wireway, and run to terminal 5 on the relay.

the table is a peice of cake. The sweep, depending on the history of your machines, may be different from the book, and differet from eachother as far as the specific terminal # in the wireway. If they were orrignaly ss chassis, and had been converted to MP or Omega-Tek, it will depend on where whoever did it decided to plug in the different wires, that is why I did not state the specific ts locations for the sweep.

The main thing is that you are putting the switch (basicly) in the z wire circuit, and the y wire circuit opens and closes it.

You will have to convert your motors as well, as the pinspotter is now switching your windings. On Nationals you simply remove the switch, and connect the 2 switch wires together. I cant remember westing house and GE exactly, you remove 1 wire off the switch board, and connect it to another terminal, I am at home, and doing this from memmory, so I will look it up at work, and post tonight after I get off if you need it.


1 more quick note. Wires 1 and 2 on relay can be interchanged, they are simply 2 sides to a switch, and it is not important which is which.

You will love those relays

Paul

[Kat]

Re: solid state start switch

Originally posted by 30n70:
Kat
any info on install of Grainger 6x550 on my 70's would be greatly appreciated. In stock...I also have old 8230's that use this part
Does the brake cicuit work OK?
Thanks

<font size="2" face="Verdana, Helvetica, sans-serif">What type of info are you looking for? As far as the braking goes, it works well. Just make sure there is no slop in the gearbox. If there is you will need to R&amp;R it and possible shim the worm wheel. When there is slop present, it will cause coasting occasionally past 66 and 0; just not as bad if there was a centrifugal in use.

[JimDorsin]

Re: solid state start switch

The conversion for the westinghouse is as follows.

Take the red wire from the plug to terminal 1 on the primary switch and move it to terminal 6 on the same switch.

This is same for AO Smith as well.

Paul