Dyn11Phase ref

Applied volts(volt)

1U1V 4001V1W 4031W1

U402

Measured volts(volt)1U2N 9.121V2N 3901W2

w385

1W2v 4011V2W 386.41V2V 386.2

Short 1U – 2u Apply 3 Phase Volts to 1U, 1V, 1W Condition :

1. 1U1V=2u2n+2n1V ie: 400=9.12+390=399.12

2. 1W2W < 1W2V ie: 385 < 401

3. 1V2W = 1V2V ie: 386.4 = 386.2

So Vector group is Dyn 11

YNd1Phase ref Applied volts(volt)

Vector diagram

Short 1U – 2u , Apply 3 Phase Volts to 1U, 1V, 1W Condition : 1. 1U1N=1U2v+2v1N=> 239.9= 34.33+205.7≈240.0 2. 1W2w =1W2v=>378.1=378.6 3. 1V2w>1V2v=>419>393.7 So Vector group is YNd1

1U1V 4321V1W 4221W1U 411 Measured volts(volt)1U1N 239.91V1N 255.21W1N 230.8

1U2v 34.33

2v1N 205.7

1W2w 378.1

1W2v 378.6

1V2v 393.7

1V2w 419

DZn0Phase

refApplied volts(volt)

1U1V 4191V1W 4211W1U 420

Measured volts(volt)1V3V 402.21W3

W402.8

3U3V 16.283U3W 16.301V3N 394.21W3N 394.61V3W 402.41W3V 402.3

Short 1U – 3U, Apply 3 Phase Volts to 1U, 1V, 1W Condition:

1. 1V3V=1W3W 402.2=402.82. 1V3W=1W3V 402.4=402.33. 1W3N=1V3N 394.6 =394.24. 1U1V = 3U3V+3V1V

419 = 16.28 +402.25. 1U1W = 3U3W+3W1W

420 = 16.30 + 402.8

D(+7.5)yn11

Phase ref Applied volts(volt)1U1V 4201V1W 4201W1U 419

Phase ref Measured volts(volt)1U3n 14.751V3n 4041W3w 3911W3v 4011V3w 3901V3v 389

Short 1U – 3U, Apply 3 Phase Volts to 1U, 1V, 1W Condition: 1.1V3w=1V3v 390=389

2. 1W3w<1W3v 391<401 3.1U1V=1U3N+3N1V

420=14.75+404=418.75

D(+7.5)d0Phase ref Applied volts(volt)

1U1V 4201V1W 4201W1U 419

Phase ref Measured volts(volt)1U2w 25.502w1w 394.122w2v 25.411W1V 4192U2V 26.122V1V 394.2

Short 1U – 2U, Apply 3 Phase Volts to 1U, 1V, 1W Condition: 1. 1W1U=1U2w+2w1W 419=25.50+394.12=419.62 2.1U1V = 2U2V + 2V1V 420 = 26.12+394.2 = 420.3 3. 2w1W=2v1V

394.12=394.2So Vector Group Is D(+7.5)d0yn11

YNd111U1V : 417

1V1W :426

1U1W :426

Measured Volts : 1U2U 2W 2V

1N

1W 1V

1U1N : 242.6 1W2V : 4242W1N :200.7 1V2V : 383.5 2W2U :41.9 1V2W : 383.9 1W2W :385.4

Inference :1U1N = 2W1N + 2W2U

(i.e.) 242.6 = 200.7+ 41.9 = 242.61W2W < 1W2V (i.e.) 385.4< 4241V2V = 1V2W (i.e.) 383.5 ~ 383.9