Interested to Buy Any Domain ? << Click Here >> for more details...
why 3 phase induction motor only need starter ? why not
other motors need starter ?(like synchronous motor,single
phase induction motors & their types) ?
- 3 Answers
- 10681 Views
- I also Faced
- E-Mail Answers
Answer Posted / sudipta
Starter is connected in series with the armature. Now, this
armature current is given by Ia=(v-Eb)/Ra. Here, v is
terminal voltage, Eb is back emf, Ra is armature resistance.
In the case of an induction motor,at the time of
starting,back emf is zero. So, Ia=v/Ra. As Ra is very small,
Ia is too high. So,a resistance(R) is connected in series
with the armature. So, the starting current decreases and
motor gets protection from overcurrent.
| Is This Answer Correct ? | 11 Yes | 6 No |
Post New Answer View All Answers
Write masons gain formula.
in 132kv substation CRT means
Two electric lamps 40 W, 220 V each are connected in series across 220 V. What is the power consumed by the connection?
If o/p power is doubled by how much does the sound increase
R=*ΒΆ l/a
i want to put single phase load on scott connected transformer,eventhough how to balance the transformer.
WHTA IS LIMT OF LEAKGE CURRENT OF 11 KV 1 CORE 1000SQ.MM. XLPE CABLE.LOAD ON CABLE IS AROUND 600AMP .LENGTH 500 MTRS.
What is value of earth resistance required for substation and equipment earthing and what are the reference guidelines
At what factor resistance r of a conductor depends?
What will be result if we connect LT votage to the terminal of HT motor?
what may the reason for vector shift in a generator?
if the armature current in a dc generator is ac ( sinusoidal ) why doesnt the sjhape af armature mmf a sinusoidal (ni) ? armature mmf in case of a dc machine is triangular.
How to calculate capacitor bank size at a load 800kVA.
Transformer diagram mention each parts ?
diameter of cable and core is doubled then the value of capacitance is
