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Normally the
starter used to
reduce the
starting
current.but the
dol starter do not
it,so why we use
it?
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Answer Posted / naresh
The name itself indicates direct online starters and these
starters will employed for low rating motors, because in
low rating motors the loaded torque is also low and
capacity of starting current will not be such high enough
to make severity, but the protection of motor at voltage
levels is important. DOL starter not only ensures on & off
but the magnetic opearting coil functions in proportion to
the rated voltage. at low voltage the magentic coil trips
down and at high voltages the coil gets damaged. here the
coil used is very sensitive to the voltage and hence it is
voltage protection device and the bi-metallic strip inside
starter makes it current protection device.where as mcb is
only current protection device.
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