Toshiba GRT100 Series Instruction Manual page 20

reference winding and set 0 (= noon) for it. For other star- or delta-connected winding(s), set
according to the Rule 1 mentioned above.
Example 1 If the setting winding leads the reference winding by 60, set 2 (= two o'clock).
Example 2 If the setting winding is in phase with the reference winding, set 0 (= noon).
Example 3 If the setting winding lags the reference winding by 60 (that is leading by 300),
set 10 (ten o'clock).
The settings for the two-winding transformer connections described in IEC60076-1 are listed in
Table 2.3.2.
Three-winding transformers are also set according to the above mentioned rules.
Example 4 Setting for star/star/delta transformer.
Primary
Secondary
(Note) The following calculation is performed in the relay for phase angle correction.
Setting
0 Ia = Ia
1
Ia = (Ia – Ic)/ 3
Ia = Ic
2
3
Ia = (Ic + Ib)/ 3
4 Ia = Ib
5
Ia = (Ib – Ia)/ 3
Ia = Ia
6
7
Ia = (Ia + Ic)/ 3
8 Ia = Ic
9
Ia = (Ic – Ib)/ 3
Ia = Ib
10
11
Ia = (Ia – Ib)/ 3
Primary (d1)
Secondary (d2)
Tertiary
Tertiary (d3)
Calculation
 19 
Setting (d1 / d2 / d3)
11
11
0
Remarks
Setting value
0
11
1
Ia
10
9
8
7
5
6
6 F 2 S 0 7 8 9
2
3
4