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Is it necessary to have a 30 sec interval between stopping and starting the motor ?


Guest Anonymous

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Hi all;p;

 

"motor shall be designed for start-up immediately after shut down, following a minimum running time of 15 mins, on a continuous, repeating basis, without overheating or damage in an ambient air temperature of 250°C for min. 2 hrs"

 

 

 

Is it necessary to have a 30 sec interval between stopping and starting the motor ?

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  • 7 months later...
Not if the motor is designed to do so more rapidly. Take thaat spec to a motor manufacturer and tell them you want a motor rated for this duty cycle. If they say they can't, move on because someone will take it on.
"He's not dead, he's just pinin' for the fjords!"
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The name of the game is......... get the heat out.

 

Force ventillation is one way .... but an ambient of 250°C...?????

 

What class insulation?

Class H : 180°C

Class N : 200°C

Class ?

 

With Class H or even Class N, force-vent would be useless unless some means of cooling the air is provided; i.e. water cooled heat exchanger, or A/C, etc..

 

As jraef said.... a proper and experienced motor mfgr. should be able to design a product that would be able to meet the specs.

Question is— how large is your budget ? It won't be inexpensive.

 

As to time between stop and re-start ... sufficient time to allow stored energy in winding inductance to dissipate to near zero before restart....is not unreasonable.

 

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