Angka Jam Trafo 3 Phasa

•The vector group denotes the way in which the windings are

connected and the phase position of their respective voltage

vectors

•The vector group describes the instantaneous phase angle

relationship between corresponding primary and secondary

quantities.

•The Vector Group relate to the phase displacement between the

HV and LV windings using a clock face notation1

Contoh Angka Jam

2

3

Penentuan Angka Jam Trafo 3 Phasa

Angka Jam Trafo ditentukan dengan 5 macam cara/metode :

1. Analisa gambar rangkaian trafo 3 phasa.

2. Tabel Kebenaran

3. Perhitungan kombinasi GGL HV & LV

4. Osciloscope

5. Tabel Kebenaran DC

4

Metode 1

R

S

T

N

r

s

t

1

2

1

2

1

2

1

2

1

2

1

2

R

ST

1

2

11

dY 1

r

1

2s1

2

t1

2

r

1

2s1

2

t1

2

1. Hubungkan terminal R-r sbg referensi2. Tentukan arah GGL pd setiap lilitan HV & LV3. Gambarkan vektor sisi primer

4. Gambarkan vektor sisi sekunder sesuai dengan hub. terminal

10

56

11

7

30o

5

Proses Terbentuknya GGL (e)

e+ I

t

6

Proses Terbentuknya GGL (e)

e

+ I

t