I'm building a dust control system in my shops attic.
The blower is an old General No4, with a motor salvaged off my lathe (7.5 h, 3 ph, 220v)
To trigger this remotely, I purchased this contactor:
Packard C340A 3 Pole 40 Amp Contactor 24 Volt Coil
Details here: https://www.johnstonesupply.com/storefront/product-view.ep?pID=L45-052
I wired it in this weekend and tried to start it.
It basically cycled on/off rapidly, a bit of arcing, then I quickly cut the trigger circuit.
(from my reading, arcing is not unusual)
The motor was spinning when I checked it. So 3 phase power did get to the motor.
Note: the blower was not connected to the motor at the time, so there was no load.
And I have run this motor off this RPC for a while. Also, no breakers blew. So I doubt its overload.
I was just trying the circuit, to see if I'd wired it correctly.
Not sure what I did wrong, I have a couple of theories
1 - does the 24v trigger need to be AC or DC? Oddly the spec's don't say. And my general research didn't yield any answers
2 - would the trigger circuit need a certain amount of current to keep the relay closed?
Sorry, these may be basic - I've just never used a contactor before
Thanks
The blower is an old General No4, with a motor salvaged off my lathe (7.5 h, 3 ph, 220v)
To trigger this remotely, I purchased this contactor:
Packard C340A 3 Pole 40 Amp Contactor 24 Volt Coil
Details here: https://www.johnstonesupply.com/storefront/product-view.ep?pID=L45-052
I wired it in this weekend and tried to start it.
It basically cycled on/off rapidly, a bit of arcing, then I quickly cut the trigger circuit.
(from my reading, arcing is not unusual)
The motor was spinning when I checked it. So 3 phase power did get to the motor.
Note: the blower was not connected to the motor at the time, so there was no load.
And I have run this motor off this RPC for a while. Also, no breakers blew. So I doubt its overload.
I was just trying the circuit, to see if I'd wired it correctly.
Not sure what I did wrong, I have a couple of theories
1 - does the 24v trigger need to be AC or DC? Oddly the spec's don't say. And my general research didn't yield any answers
2 - would the trigger circuit need a certain amount of current to keep the relay closed?
Sorry, these may be basic - I've just never used a contactor before
Thanks