WHAT TYPE IS THAT ANDY,ITS FOR COLLEGE DESIGN PROJECT,SOMEONE SAID MOTORS SHOULD BE ON A D TYPE DUE TO HIGH STARTING CURRENTSBS1202-1:2002?
thank youCanoeboy said:It would really depend on how the motor is starting and what the load type is, so a one size mcb fit all is not really an acceptable answer
The best breaker in my opinion (that i use all the time) for a motor (in general terms) is a motor protective circuit breaker MPCB
http://w3.siemens.com/mcms/industrial-controls/en/protection-equipment/circuit-breakers/pages/default.aspx
The nail that Andy has pointed to was a very old fashioned method that is by todays standards frowned upon......
Have you ever tried to get the max Zs for these?Canoeboy said:It would really depend on how the motor is starting and what the load type is, so a one size mcb fit all is not really an acceptable answer
The best breaker in my opinion (that i use all the time) for a motor (in general terms) is a motor protective circuit breaker MPCB
http://w3.siemens.com/mcms/industrial-controls/en/protection-equipment/circuit-breakers/pages/default.aspx
The nail that Andy has pointed to was a very old fashioned method that is by todays standards frowned upon......
and you have tried this?Canoeboy said:You just get the appropriate tripping curve from siemens and work it out dont you ?
Thanks for the linkCanoeboy said:Yes thanks.
You can also ask the manufacturer for the Zs details for the appropriate range of MPCB
Here is a Schneider table, Siemens, ABB and Eaton all have these details although sometimes they are hard to find.
http://www2.schneider-electric.com/resources/sites/SCHNEIDER_ELECTRIC/content/live/FAQS/139000/FA139612/en_US/FA139612.pdf
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