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STAR-DELTA STATER
@Bishal Sharma @EIE
`Star-Delta
A balance three(3-Φ) phase supply can be connected either in delta or star connectionΦ
Delta connection Star connection
NeutralVp
VL
IN CASE OF DELTA
Delta connection
VL=VpandIp=IL/√3
Where..
VL=Line voltageVp=Phase voltageIL= Line currentIp= Phase voltage
IN CASE OF STAR
Star connection
NeutralVp
VL
IL=IpVp=VL/√3
Where..
VL=Line voltageVp=Phase voltageIL=Line currentIp=Phase voltage
DELTA to star
Delta connection Star connection
NeutralVp
VL
Delta to star…..
STAR to delta
Delta connection Star connection
NeutralVp
VL
Star to Delta….
Delta connection
Star connection
Both Star vs Delta
Star Starter
Working
Delta connection
Delta working….
Working…
Working…
A1
A2
A3
A4
A5
A6
U1
V1W1
U2 V2 W2
Fuse
Thermal overload Relay
Delta contactor
Starcontactor
Star-Delta Connection
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