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IDEALLY OR AS PER STANDARD: KNOW EXACLY WHAT IS WRITTEN IN A MOTOR NAMEPLATE AS EXAMPLE ON THE FOLLOWING PARAMETERS; A. FULL LOAD CURRENT(AMPS) = SAY 50 AMPS. B. SERVICE FACTOR = USUALLY DECLARED AS = 1.15 THE NORMAL AND ACCEPTED PRACTICE IS TO MULTIPLY THE FLA = 50 AMPS BY 125% AND THE RESULT IS 62.5 AMPS. THIS IS THE MAXIMUM ALLOWABLE OVERLOAD CURRENT TO PROTECT THE MOTOR FROM INSULATION OR WINDING DAMAGE. THE 25% PERCENT ALLOWANCE = 62.5 AMPS WILL BE SET TO AN OVERLOAD RELAY TO CUT OFF WHEN REACH. IF THE SERVICE FACTOR IS AVAILABLE = 1.15 -- THIS MEANS THE MOTOR IS CAPABLE OF RUNNING UP TO 15 PERCENT HIGHER (OVERLOAD) THAN FULL LOAD CURRENT WITHOUT DAMAGE BUT REDUCING BEARING AND INSULATION END-OF-LIFE.

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17y ago

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