what is the difference between star and delta connection ?
when we use each one ?what is the best ?

Answer Posted / zahid khan

star is only used intial to because the supply voltage is
VL/root3 and due to high starting torque of induction
motor,'star delta circut used above 20kw.

Is This Answer Correct ?    29 Yes 13 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

How do we calculate over and under frequency tolerance from generator data?

1005


Define what is the function of anti-pumping in circuit breaker?

688


how can i improve the power factor in domestic (230v)

1542


How to check the LM324 Ic

8017


what maximum range of star & delta in hp or kw ?

1268






which connection is safer series or parallel?usually which connection we prefer at home?

8298


why using transformer and thyristor switch in 3 phase apfc panel

2373


what is meant by impulse voltage?

1542


234 MVA Generator 3 phase Short circuit current Values required? Gen set Rating-234 MVA, Gen Voltage-18kv, PF;0.8, Xdv:23.5 %, Transformer Rating-18/380KV, 680MVA,Yndd1 two winding, Step up TR, ZT:35.50 %,X/R 4.33 Gen CB Position, CB open ,Disconnected open, Generator Running Voltage 18 Kv, Bi mistakes generator side earth switch Closed during that time short circuit current level in 3 Phase required, and how to test on site 234MVA Generator Short circuit current,

1735


Describe Non I.S. Earth System and why is it used?

1292


Work done in a free expansion process is

703


why dc is used in control circuit for mv & hv switchgear instead of ac

1451


Pls explan the OLR setting in VCB at HT yard

2159


In a power conditoining unit (inverter) of a solar plant when we measure the d.c. current fed by different strings of solar plates to inverter, the current in the negative wire is less almost by 1 ampere to the current in its positive wire say current in positive wire 5 A , then current in negative wire of the same string is 4 A. Since the current entering should be equal to current leaving then why the current is noticably less in negative wire.

1124


What is DC series motor?

720