Answer Posted / deadzg_devil
Y-D starter is used in starting of IM.
The main purpose of using this topology is to reduce the starting current of IM.
As in Y the voltage will be 1/root 3 time line voltage therefore current drawn will be less as compared to in D connection.
When the IM motor attain 75% of it's rated speed at this the connection is changed to D topology to attain full speed.
Is This Answer Correct ? | 12 Yes | 1 No |
Post New Answer View All Answers
Define active filter?
Its possible to use 3core 2R of 240 sq.mm cable for 3phases & separely 50sq.mm 3core cable fully for Neutral for connection of PCC to MCC 3ph..4wire system?
Power Factor Correction Panel (Manual & Automatic)
what is meant by twilight switches 7 where its applicable ?
if we run a 3 phase machine on two phase what will happend??? given answer with solid reason please
what are the stresses in circuit breakers ?
What will be the output voltage of a transformer if it is primarily energized from a square wave voltage source?
what will happen if there is a voltage leakage or current leakage in an electrical train
how can calculate resistance box for 15 kw, 6 pole, RV-230, RA-42 motor
how commomn gate triggering is given for TRIAC ? other thyristor wont be efffected?
wish of these transformer uses oil?
Why water bubbles when D.C. Current is passed through it? Why not when A.C. Current is passed?
In case of generator when we consume more power produces by it why load on generator increase and starts sound more. and how it is adjusted..
Does the direction of rotation of d.c. Shunt motor would get reversed if the armature current and field current both are reversed?
What is the role of power pack in substation protection system?