Search results for query: *

Bill, go back to my post and you will see that I took umbrage ONLY with jraef's statement : TECHNICALLY, a lot of 230V rated motors can safely run at 208V, which I placed in Quotes .... I have no quarrel with the remainder of his post; only with that statement which I, and NEMA disagree...

Badger2011 Here is a link to a PDF file published by ACME Transformer. It contains a treasury of information about Buck-Boost transformers and their application. I think you'll find the information you need when considering them as a remedy for your situation...

Contrary to Jeff's (jraef's) comment, NEMA MG-1 2011 and real world experience would disagree. NEMA MG-1 Section II, Part 14.35 - OPERATION OF 230-VOLT INDUCTION MOTORS ON 208-VOLT SYSTEMS 14.35.1 General Induction motors intended for operation on 208-volt systems should be rated for 200...

Lionel - When Abraham Lincoln stated "...that All men are created equal...." he wasn't referring to comprehension abilities. Ergo, One man's "extremely oversimplified" is another man's Clarity. We all don't share the same yardstick ! It was ever thus.

I've made a very good living replacing 230v motors and such with 208-230 vac motors.... Also adding Boost tranformers to raise 208 to 230 .. back in the days when SCE went to 208 v as their standard ....(claimed it saved them a few dollars.... cost their customers a bunch, though!) One...

Buddy, F Y I Did a Google search on 1-HP 12vdc Perm. Mag. motors. Three different ones; Dayton, Hallmark Industries, and Leeson Electric .... all are spec'd at 80 amperes. Calculates to 214 watts of losses or just under 29% losses ... Oofta! So, your approximation of 1-HP = 1-kVA .... is...

Correction to previous: I've contacted NEMA for a better explication of Section II, Part 13.

working on a reply for you, Pete. I've contacted NEMA for a better explication of 13.2

Mike, 'tis a subject for tasteful discussion, perhaps in another venue ..... Three Muskateers anyone ? No SNICKERing now.

My recollection is that they were DOL... conveyors and such ....

Pete, This event goes back to sometime in the 90's. Details are a bit sketchy. I do recall that I was at a seminar presented by Baldor and sat next to a PhD. (who's name escapes me) who was responsible for plant engineering of all M&M Mars Candy. Sitting across the table was the speaker...

Pete, Baldor is a much different company today than it was some 10+ years ago. With their purchase of the power transmission and motor product businesses of Reliance / Dodge from Rockwell (Rockwell kept the drives business and today announced the purchase of a Chinese medium voltage drive...

I remember some years ago when MARS Candy in Chicago area had an epidemic of Baldor motors that had a high incidence of bearing failure. They put vibration monitors on motors newly installed and could watch the vibration level increase over a short time of operation. Seems the problem was...

When heat is an issue, it is common practice to either force ventilate the motor .... or to over-frame-size it.

H-m-m-m. What kind of pump (Centrifugal or Positive Displacement) and what is the application that requires the pump to be run in reverse ? How do you control the pump using the overloads ? Seems there's more here than meets the eye.

Jeff, Consider that the antipode of SAFE is DANGER ... and set your mind at ease. " It was ever thus. " <g>

In the USA, there's NFPA 79 Electrical Standard for Industrial Machinery. In the 2012 edition, see Section 10.3 Indicator Lights and Icons of Color Graphic Interface Devices and Table 10.3.2 Machine Indicator Lights and Icons.

Well Thinker, If that be so, then consider that your O.P. (Original Post) lacked the clarity necessary to discern your intent. The information I imparted to you was based upon FACT... not opinion. Do you really believe that OPINION... that is not grounded by FACT... has any useful value ...

U-u-u-m-m-m-m Skogsgura ..... you sure about that ????? Think you'll find that the universally accepted definition for overload .... is 100% load + 50% more = 150% What you said would constitute 100% rated + 100% more + 50% more = 250% and fer sure... that don't happen as a rule...

Each manufacturer's Design Criterion must be known before a blanket statement could even be considered to be postulated. Some things to 'think' about : - ambient temperature— 25 deg. C ......40 deg. C .... 50 deg. C - altitude - environment (clean vs dirty) ... and impact upon cooling of...