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- Dec 6, 2012
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- 2,677
Can anyone coach me on which heaters I need for a Cutler Hammer Manual Starter NEMA 1 (pic below)?
Based on http://www.electricalmaterials.ca/ch_heaters.htm
It appears as though I need to know if this is an open or enclosed Cat....
Here is specifically what I'm thinking:
Note: I want this to be this to be safe and appropriate?
This Manual would switch two 3hp 3ph motors.
Each would have it's own down line switch.
The Clausing DP is powered by a 3ph 3hp motor drawing up to 9.2amps at 230v (pic below).
Eventually I want to feed this through a F/R drum switch.
The WT DP two speed motor already has a two speed F/R switch (motor pic below).
At 3hp she supposedly draws up to 8amps.
I'd add a second set of heaters to protect the low speed after the low speed switch.
Please note that one motor pulls the 9.2 and the other 8.0.
I'm thinking of installing heaters to cover the 8.0.
If I'm pushing a DP hard enough to use all 3hp I'm overworking the drills.
Worst case I might have to let the heaters cool. It shouldn't hurt the motor. Is this correct?
Yes, I'm aware there might be better ways to do this. Such as two F/R magnetic starters.
However, this manual starter was gathering dust on the shelf, and the two speed motor is already wired with a two speed F/R drum switch.
More parallel thread here: http://www.hobby-machinist.com/threads/thanks-to-hm-for-the-clausing-dp-restore.61569/
There was a thread I started last spring when I was thinking of using a VFD. However, I'm thinking for the times I need to drill large enough to warrant that slow of a speed (below 200) I can use the Cincy Toolmaster 1D 40taper mill and it's power down feed.
Thank you all for your ongoing assistance and redirection.
Daryl
MN
Based on http://www.electricalmaterials.ca/ch_heaters.htm
It appears as though I need to know if this is an open or enclosed Cat....
Here is specifically what I'm thinking:
Note: I want this to be this to be safe and appropriate?
This Manual would switch two 3hp 3ph motors.
Each would have it's own down line switch.
The Clausing DP is powered by a 3ph 3hp motor drawing up to 9.2amps at 230v (pic below).
Eventually I want to feed this through a F/R drum switch.
The WT DP two speed motor already has a two speed F/R switch (motor pic below).
At 3hp she supposedly draws up to 8amps.
I'd add a second set of heaters to protect the low speed after the low speed switch.
Please note that one motor pulls the 9.2 and the other 8.0.
I'm thinking of installing heaters to cover the 8.0.
If I'm pushing a DP hard enough to use all 3hp I'm overworking the drills.
Worst case I might have to let the heaters cool. It shouldn't hurt the motor. Is this correct?
Yes, I'm aware there might be better ways to do this. Such as two F/R magnetic starters.
However, this manual starter was gathering dust on the shelf, and the two speed motor is already wired with a two speed F/R drum switch.
More parallel thread here: http://www.hobby-machinist.com/threads/thanks-to-hm-for-the-clausing-dp-restore.61569/
There was a thread I started last spring when I was thinking of using a VFD. However, I'm thinking for the times I need to drill large enough to warrant that slow of a speed (below 200) I can use the Cincy Toolmaster 1D 40taper mill and it's power down feed.
Thank you all for your ongoing assistance and redirection.
Daryl
MN
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