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jesin
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Join Date: May 2010
Posts: 5

locked rotor currents

05/21/2010 1:28 PM

locked rotor current and design of breakers and fuses-olp
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North of 60
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#1

Re: locked rotor currents

05/21/2010 4:00 PM

Please accept my compliments on forming such a well crafted and thought out question. Obviously the FAQ on question formation that CR4 has available, serves no identifiable purpose.

http://cr4.globalspec.com/faq

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kvsridhar
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Location: Temporarily at Ashburn, VA
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#2

Re: locked rotor currents

05/21/2010 9:53 PM

1.Locked rotor current is usually 6 to 8 times full-load current. Check motor specs for more info.

2. Circuit breakers and fuses provide short-circuit protection, not locked rotor normally.

3. Overload relays provide overload protection including locked rotor protection normally.

4. Both need to be coordinated (Type 1 or 2) for proper protection of motor.

5. Ask your question in a better way as already mentioned.

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