ACL or ATL? (for across the line motor starters)
ACL or ATL? (for across the line motor starters)
(OP)
What is the proper way to reference a full voltage (across the line) starter, in terms of abbreviation, ACL or ATL? Although, from the electrical standpoint, this type of device is called FVNR (full voltage non-reversing) sometimes we call them "across-the-line". I have seen it both ways (ACL and ATL) on many different motor starter's manufacturer manuals and technical articles. What will be the right one?





RE: ACL or ATL? (for across the line motor starters)
RE: ACL or ATL? (for across the line motor starters)
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If we learn from our mistakes I'm getting a great education!
RE: ACL or ATL? (for across the line motor starters)
But then again, I am guilty of using X-line, so what do I know?
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RE: ACL or ATL? (for across the line motor starters)
For me ATL is the code for Atlanta airport
RE: ACL or ATL? (for across the line motor starters)
"The perfect is the enemy of the good." -- Voltaire
RE: ACL or ATL? (for across the line motor starters)
All of you are right!!!
I did my research and found out that:
ACL = ACross the Line (acronym used in some sectors of the water and wastewater industry and some IEEE articles). ACL, also can be found in CAD, graphic and drafting standards (or symbology) in architecture and construction sector in early 90's. e.g. "blueprints" and drafting manuals dated between 1900 to 1990.
ATL = Across The Line (acronym used by some motor starter's manufacturers and end-user sector, mostly in USA). ATL starter is defined as follow; a category of starters in which the motor is directly connected to the supply lines, allowing full voltage when the motor starts; therefore across the line. In my opinion, ATL is used by a writer or an author (in technical articles or manuals) after mentioning the whole word as a form of laziness, or I should say to avoid redundancy.
DOL = Direct On Line starters (acronym used all around the world, electrical engineering books and electric motor-related reference, therefore the most commonly used).
RE: ACL or ATL? (for across the line motor starters)
RE: ACL or ATL? (for across the line motor starters)
What does it stand for?
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RE: ACL or ATL? (for across the line motor starters)
"The perfect is the enemy of the good." -- Voltaire
RE: ACL or ATL? (for across the line motor starters)
So perhaps a distinction should be made:
FVNR refers to one type of device used for DOL starting.
DOL and "accross the line" refer to the starting method. There are general terms which apply even to larger motors that use breakers rather than starters.
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RE: ACL or ATL? (for across the line motor starters)
Your assessment is correct, if read by itself. However, the OP was referring to FVNR and DOL. Also the use if acronym FVNR is limited to the NEMA world, it's equivalent is DOL "starter" in many other parts of the world.