Definition of Sealed VA Burden

I didn't have much time, sorry, why don't you go to that company's website and search for "glossary" or "definitions" - it is not a field I am comfortable with as to giving free advice.

When you energize a contactor coil, there is an initial inrush current similar to the inrush current when starting a motor. Then there is a steady state current going thru the coil - this is the “sealed VA”. On page 33 of the linked data sheet, there is a section “Coil Consumption”. It lists a value in VA for “pick-up” and a value for “hold-in”. Note: You state you will have several contactors connected in parallel – the inrush/pick-up VA is shown as 8 to 11 times the holding VA. Turning several of these contactors at the same time might cause a problem with the power feed by overloading it for a short time by oh, about 8 to 11 times your steady state current; but that short time (whatever it is) very likely will trip your protective breaker. With that warning I strongly suggest you get input from someone who has done this before, as it will affect the sizing of your transformer. And I'm sure someone will chime in on needing to be aware of the electrical code for your corner of the world.

Welcome to the fascinating world of design.

I had more or less assumed everythig you just said

The thing that is frustrating is that this is an AB document and it also an AB part

In one document they call it in rush the other its pick up in one doc its sealed VA and the other its hold in

Real nice consistency. As far as the trasnformer sizing goes this is a high current (16 A) relay card 1769-0w8 Its designed to turn on large contactors and other devices

The safety will be in the program that there is a delay or specific order in which the relays are energized.

Yeah, that. I was going to say something stupid like, " 'the sealed VA' is the real power component of the complex power when no smoke is leaking out!"

Good thing he is not depending on me for electrical advice. Ha! 8-10 times a lot is a full whallop!

<...Can someone explain...> Of course! Look, the local Rockwell distributor can answer these and many other questions over the phone. The priority is ALWAYS a telephone call to the equipment supplier, as that way, a working relationship is built up, which can lead to dividends in the future.

It is becoming startling how many telephones there are on the planet, and how little people actually use them to talk to other people these days. Is the telephone conversation a dying art or something (rhetorical question - NNTR)? Is learning how to use the telephone from the age of three or four no longer a part of the family childhood experience (rhetorical question - NNTR)?

Bring back the 20th Century. It was much nicer. People knew how to actually do stuff.

<unsubscribes>

Aw, come on back PW, you don't mean it.

Let's have some fun, fireworks with smoke release, OK?

Ah! The 20th century, back when a human answered the telephone. Back when the person that answered could actually understand your question or direct you to someone who could without putting you on hold for a half an hour, only to connect with the voice mail for someone who would never call you back

Yeah, now you have to come here.....a timeless all-knowing oracle of information....haha, I guess we'll all be uploaded and assimilated soon....

Hey: PW, have you actually tried calling a big company recently?

It's pretty sad that we don't know if your quote is real or fake.

In the old days you could usually hit "0 for operator" and get a real person. Sometimes "911" would get the Quality or Safety Response departments. Now these are normally gone.

... press 71 for ....