ADVANTAGE & DISADVANTAGE OF STARTERS

Direct on line
a) Simple and Inexpensive
b) Starting cannot be regulated

dis

a) High starting current
c) Starting cannot be regulated

Star-Delta
a) Relatively inexpensive

dis
a) Low starting Torque
b) 6 terminal motor required
c)Break in line supply when changing (arc & loss of torque)
d) No adjustment of starting current

Primary Resistance

a) Possibility of adjusting starting starting current current
b) No break in line supply during starting

dis

a) small reduction in starting current
b) Require resistor


AutoTransformer
a) Good torque
b) Possibility of auto-transformer adjusting starting values

Dis
a) Requires a costly auto-transformer


Rotors Resistance

a) Very good torque
b) Low starting more expensive
current
C) Possibility of adjusting starting current
d) No break in line supply

dis

a) a slip ring motor more expensive
b) Requires resistors