Interested to Buy Any Domain ? << Click Here >> for more details...
difference between dol and rdol startors?
- 2 Answers
- 33852 Views
- Vijai Electricals, I also Faced
- E-Mail Answers
Answer Posted / madhu
RDOL IS NOTHING BUT REVERSIBLE DIRECT ON LINE STARTER.
This kind of starter is required when the motor is required
to run in both forward as well as reverse directions
according to the application.
Power circuit: There is one more power contactor connected
across the power contactor in the power circuit with two of
the phases interchanged to achieve reversal of rotation. The
two contactors are mechanically interlocked to ensure that
both of them do not operate simultaneously. The shorting of
two different phases is avoided through this arrangement.
Control circuit: The control circuit obviously consists of
two start push buttons, one for ‘FORWARD START’ and another
for ‘REVERSE START’. Each of them controls the supply to the
respective contactor coils responsible for the supply to the
motor in forward and reverse modes. The stop command is
common for both modes since it is independent of type of
operation. The NC contact of forward contactor is connected
in series with reverse contactor coil and that of reverse
contactor is connected in series with forward contactor
coil. This is the electrical interlock, which ensures that
only one contactor will pick up at a time avoiding any
mal-operation and consequent damage to the feeder and
problems to the dependant processes.
•
Indication circuit: One more Red LED is required to indicate
the ‘Reverse ON’ mode.
One NO contact of the reverse contactor is connected in
series with it.
| Is This Answer Correct ? | 26 Yes | 6 No |
Post New Answer View All Answers
Difference between RCCB, RCBO and ELMCB.
my diploma certificate in my higher education college
what is Different between Bilinear and Unilenier?
Brief working principle of stabilizer,application & safety precautions
how r charge carriers produced
how a.c. genarator control power factor when its conected to grid supply by incrising or decresing excitation voltage.
wat is the first thing dat is needed, 2 lay a cable in some area??
why ct's&pt'S out put called as burden,why compelsary short ckt the secondary of ct's while removing the burden?
In Dyn11 power transformer if any one of the 3 phases connected to earth in star connected side then please explain effect of the current flow in delta connected side of transformer.(In this case if one phase is shorted to ground in star connected side then we observe the current flow in two phases only not three phases in delta connected primary side. Please explain why it is so?)
What current position are you holding in your current company?
What are the basic elements used for modeling mechanical translational system?
Explain the operation of grid connected central solar inverter ?
our factory is going under construction mean time transformer 1000 kva 2 nos &load break swithch 12 kv & 4 nos 750 kva 2 nos & 380 kva 2 nos generator to be errcted.how to arrange earth pits &how to earth connect & neutral pit how to calculate in earth bit size.
Why armature rheostat is kept in maximum position?
why does make gain margin and phase margin on same plot.?
