motor start stop
motor start stop
(OP)
Hello everbody
can anyone please help me in answering the below questions
1. what is the logic behind number of start/stops for domestic water pumps, is there any formula or calculations for the same ?
2. How to calculate the expansion tank size for the booster pumps, is the tanks size also related to the number of starts and stops of the pump??
thanks
can anyone please help me in answering the below questions
1. what is the logic behind number of start/stops for domestic water pumps, is there any formula or calculations for the same ?
2. How to calculate the expansion tank size for the booster pumps, is the tanks size also related to the number of starts and stops of the pump??
thanks





RE: motor start stop
The size of the expansion tank may be related to the time between starts or it may be related to the volume of the system and the increased volume due to temperature rise.
It depends.
Bill
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"Why not the best?"
Jimmy Carter
RE: motor start stop
FAQ237-1285: Limits for repetitive induction motor DOL starting
Bill has it right about the reason for starting limits.
He also has it right that relationship between expected starting frequency and tank size (if any) depends on the system.
A note about terminology, in my limited experience a tank called an "expansion tank" would not be related to motor start frequency. A tank called an "accumulator tank" would be related to motor start frequency. But don't focus too much on the terminology, look at the system and how it's operated.
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(2B)+(2B)' ?
RE: motor start stop
Keith Cress
kcress - http://www.flaminsystems.com
RE: motor start stop
The tanks used for storage and or pressure are often called pressure tanks or storage tanks.
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: motor start stop
http://en.wikipedia.org/wiki/Expansion_tank
and an "accumulator" falls in the former category
http://en.wikipedia.org/wiki/Hydraulic_accumulator
Your "absolutely" comment makes an assumption contrary to the above terminology. I think we'd both agree the function of the tank is more relevant than the name.
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(2B)+(2B)' ?
RE: motor start stop
you have so far started three separate discussions with the exact same question.
Please go to the other two, Red Flag them, and in the resulting dialog box, ask that the discussions be removed.
Please do not multiple post again.
Thank you.
Mike Halloran
Pembroke Pines, FL, USA
RE: motor start stop
Please read the forum policies. There's a link below my name.
Best to you,
Goober Dave
Haven't see the forum policies? Do so now: Forum Policies
RE: motor start stop
Thanks for the reply and my apology for posting in three forums
i am gonna remove them now
regards
RE: motor start stop
Keith Cress
kcress - http://www.flaminsystems.com