sethar Posted February 10, 2004 Report Share Posted February 10, 2004 I want to know the defination of lock roter current & short circuit current ? Any body can explain me through practical example / through graph or curve? Link to comment Share on other sites More sharing options...
marke Posted February 10, 2004 Report Share Posted February 10, 2004 Hello sethar The Locked Rotor current is the current that flows into an induction motor when full voltage is applied and the rotor is not turning. This is the current drawn when you Full voltage start an induction motor.As a rule, induction motors draw close to Locked rotor current until they are almost at full speed. The current at 50% speed would typically be higher than 85% Locked Rotor Current. Short circuit current is the current that would flow if the circuit to the motor or within the motor developed a short circuit. This current is limited by the falt current of the circuit and will be many times higher than the locked rotor current of the motor. (It should be at least 10 times the LRC of the motor in the case of a feeder short) Best regards, Mark Empson | administratorSkype Contact = markempson | phone +64 274 363 067LMPForum | Power Factor | L M Photonics Ltd | Empson family | Advanced Motor Control Ltd | Pressure Transducers | Smart Relay | GSM Control | Mark Empson Website | AuCom | Soft Starters Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now