Contactors? Best reasonably priced
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Contactors? Best reasonably priced
I am ordering components for my panel. I need 50A magnetic contactors according to DMM. Can that be correct for a 1kW drive?? Seems really high.
Where is the best place to buy these at reasonable prices?
Where is the best place to buy these at reasonable prices?
Clay
near Winston-Salem, NC
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Re: Contactors? Best reasonably priced
Wow That C8's gonna twist itself into knots! All three axes cranking out 1 1/3 HP...at the same time? I think their contactor rating is for a much bigger machine. Check your PM in a few minutes.
Milton in Collierville, TN
"Accuracy is the sum total of your compensating mistakes."
"Accuracy is the sum total of your compensating mistakes."
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Re: Contactors? Best reasonably priced
That's what I need to clarify DMM. The drive has a rating of 8 amps. They say in the manual to add 50A contact rating for each drive. That means I need 150A contactor!!! Something seems very wrong. lol
I am going to follow up with DMM Monday.
Clay
I am going to follow up with DMM Monday.
Clay
Clay
near Winston-Salem, NC
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Re: Contactors? Best reasonably priced
I just got in my 3 DYN4 drives saturday and no where in the manual do I see it needs contactors. Just a e-stop to knock out the 24V
Barnesville, PA.
I always thought it would take longer to grow old.
I always thought it would take longer to grow old.
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Re: Contactors? Best reasonably priced
Did it come with a manual? I used the download manual.
Clay
near Winston-Salem, NC
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near Winston-Salem, NC
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Re: Contactors? Best reasonably priced
This threw me for a loop as well... Here's what I found when i was having the same problem:I am ordering components for my panel. I need 50A magnetic contactors according to DMM. Can that be correct for a 1kW drive?? Seems really high.
Where is the best place to buy these at reasonable prices?
If you look on page 23 of the manual, you'll see the notes that say:
3. Select circuit breaker (MCCB)
and magnetic contactor (MC1) with
enough capacity according to servo
drives connected.
So I take that to mean if each drive pulls 8.3A, you can use a 30A magnetic contactor... but that's how I read it. I'm still learning the high voltage wiring myself. I'd love to hear other's input about my assumption.
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Re: Contactors? Best reasonably priced
Thanks, I didn't see that in the manual, but I went with what actually made sense to me, and purchased a 32amp contactor and some 30amp fuses.jason1098 wrote: ↑Sat Jan 13, 2018 11:52 amThis threw me for a loop as well... Here's what I found when i was having the same problem:I am ordering components for my panel. I need 50A magnetic contactors according to DMM. Can that be correct for a 1kW drive?? Seems really high.
Where is the best place to buy these at reasonable prices?
If you look on page 23 of the manual, you'll see the notes that say:
3. Select circuit breaker (MCCB)
and magnetic contactor (MC1) with
enough capacity according to servo
drives connected.
So I take that to mean if each drive pulls 8.3A, you can use a 30A magnetic contactor... but that's how I read it. I'm still learning the high voltage wiring myself. I'd love to hear other's input about my assumption.
Clay
Clay
near Winston-Salem, NC
unofficial ACORN fb group https://www.facebook.com/groups/897054597120437/
near Winston-Salem, NC
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Re: Contactors? Best reasonably priced
I'm using something like this to power up the whole cabinet on the Phoenix 4x4 router:
2 Pole 30A 120V Definite Purpose Contactor Honeywell DP2030B5004 http://r.ebay.com/ixVmzy
This would be a good choice for the relay to Estop the power to the DYN4 drives. I'm not so sure I am worried about the logic supply side. No 240VAC to DYN4's= no servo motor movement.
These are good because they are 24VDC coils, you can run 24VDC through relay 1 (Estop relay) and then to the relay below (Or use a non relay output):
DAYTON 30A Enclosed Power RELAY Contactor 24 VDC 1EJH9 (12) http://r.ebay.com/XwmFJf
(These are what I am using to turn off and on the router motor and the dust collector)
The math:
750W servo, assuming 240VAC input:
750/240= 3.125A per servo motor
3.125A*3= 9.375A and that's, shall we say, balls out.
The relays above are DPST. They have 2 sets of contacts and they are normally open. Contact rating should be WAY more than enough for the 3 DYN4 drives running at 240VAC input.
I finished my backpanel, opened up my servo drive box and found 400W NEMA 23's instead of 750W NEMA 34's. I emailed DMM, hopefully they can ship the correct motors on Monday....it happens.
Marty
2 Pole 30A 120V Definite Purpose Contactor Honeywell DP2030B5004 http://r.ebay.com/ixVmzy
This would be a good choice for the relay to Estop the power to the DYN4 drives. I'm not so sure I am worried about the logic supply side. No 240VAC to DYN4's= no servo motor movement.
These are good because they are 24VDC coils, you can run 24VDC through relay 1 (Estop relay) and then to the relay below (Or use a non relay output):
DAYTON 30A Enclosed Power RELAY Contactor 24 VDC 1EJH9 (12) http://r.ebay.com/XwmFJf
(These are what I am using to turn off and on the router motor and the dust collector)
The math:
750W servo, assuming 240VAC input:
750/240= 3.125A per servo motor
3.125A*3= 9.375A and that's, shall we say, balls out.
The relays above are DPST. They have 2 sets of contacts and they are normally open. Contact rating should be WAY more than enough for the 3 DYN4 drives running at 240VAC input.
I finished my backpanel, opened up my servo drive box and found 400W NEMA 23's instead of 750W NEMA 34's. I emailed DMM, hopefully they can ship the correct motors on Monday....it happens.
Marty
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Mesa, AZ
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Mesa, AZ
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Re: Contactors? Best reasonably priced
I don’t really understand how the MCCB and MC1 are wired up in that diagram. I know how a relay works but the diagram makes no sense to me. Can someone explain? I’ll need to do something for my single Dyn4 when I get around to wiring it up.
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Re: Contactors? Best reasonably priced
Below is a single phase 110 or 220 input at R/S. MCCB is a circuit breaker. I used fuses.
The branch has estop, the Master Control 1 coil, and on/off switch.
MC1 coil makes R/S come on when the circuit is closed.
R/S goes to the motor power.
L1, L2 branch off to the logic supply of the drive. Hence the EMI filter and low Ampere fuses.
Clay
near Winston-Salem, NC
unofficial ACORN fb group https://www.facebook.com/groups/897054597120437/
near Winston-Salem, NC
unofficial ACORN fb group https://www.facebook.com/groups/897054597120437/