In Preperation for hooking up Delta ASDA-B2 to Acorn.

[AnnArborNate]

LC1DT40B7

Looks like this is a 3 phase contactor for powering the 3 phase

Appears to be- https://my.rs-online.com/web/p/contactors/4547856/

[AnnArborNate]

Curiously, the symbol shown on the Acorn Diagram appear to have the little question mark style features that I believe are the "overload" symbols. However the parts numbers shown above do not appear to me to have thermal overload protection.

[martyscncgarage]

Curiously, the symbol shown on the Acorn Diagram appear to have the little question mark style features that I believe are the "overload" symbols. However the parts numbers shown above do not appear to me to have thermal overload protection.

Its logic power it does not need thermal overload protection.
I believe the intent was a circuit breaker. They may have used the "wrong" symbol.

[martyscncgarage]

From Centroid:
"Marty, that's a circuit breaker/fuse for the lower current of the logic circuit."

[AnnArborNate]

Marty-

Much appreciated. I am grateful for the help/info/follow up.

I don't have much knowledge to offer when it comes to these matters, however should you ever have a question about grinding/grinding machinery, I am qualified to speak on the following-

Od grinding
Surface grinding
Id grinding
Jig grinding

I worked as a "grinderhand" and have a better than working knowledge of general toolroom grinding.

Just thought I would add this so that if I can ever help, please let me know.