Recent content by Som_P

480 V primary 120 V secondary. 9 temperature controllers and 2 power supplies coming off the 120VAC total Amps are ~10A This is 3-phase. How do I find the right size transformer?

That's what I was hoping to find out; if the wireways affect air flow. Using wireways that are slotted and also will only be about 50% full. The problem is the overall layout. Customer specified cabinet size so space is limited. May be a tight squeeze for all components. Electrician may not...

Quick question. If the manufacturer's specs ask for clearance top and bottom when mounting in the cabinet, does that usually mean actual open space? For example, I am using Watlow Power Controllers that require 4 in. of clearance top and bottom. I have about 2 in. spacing with a 2x3 in...

I apologize for not being clear, well not proof reading my comments. Anyway, I need to get a 24VDC power supply, this is being fed by 120VAC. My main question was to select the 24VDC power supply as it relates to total current?

So basically I would be adding up the total current? Then simply select a power supply with enough current capacity? If a spec sheet list inrush current in VA, what formula would I apply to find Amps(A)? This is 3-phase by the way.

What things do I need to consider when selecting a proper sized power supply? Basically this is control power, ouputs are pushbutton lights, alarm horn, and solenoid valves. Do I look at the peak inrush current? Average holding current?