Answer / sindhu

fuse rating is selected depending upon the rated current
which will be specified in the name plate details of the
motor.
usually for load test,
fuse rating=(125\100)*rated current

Answer / harish kumar

fuse rating is selected depending upon the full load current of the motor , generally 1.5 times higher then the full load current.

Answer / arulkumaran

FUSE RATING = CURRENT RATING * 1.25
(e.g) motor current rating = 8 ampetre
fuse rating = 8 * 1.25
= 10 ampere

Answer / os

Code F: 2.5 X FLA
No Code Letter: 2.5 X FLA
Wound Rotor 1.5 X FLA

Answer / alpesh chauhan

dear friends, fuse is provided as backup protection for relay and is for short ckt and ground fault protection. Its rating is depend upon relay rating. Not upon motor.

Answer / dany

fuse rating will be decided by the line current of the
motor ,but not on the basis of armature currentor field
current
for ex if line current is say13.6amps ,then fuse should be
13amps

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