GE D30 Instruction Manual page 452

PHASE DISTANCE THROUGH POWER TRANSFORMERS
The Zone 1 settings are:
PHS DIST Z1 REACH
: "85"
PHS DIST Z1 RCA
PHS DIST Z1 XMFR VOL CONNECTION
PHS DIST Z1 XMFR CUR CONNECTION
The Zone 3 settings are:
PHS DIST Z3 REACH
: "89"
PHS DIST Z3 RCA
PHS DIST Z3 XMFR VOL CONNECTION
PHS DIST Z3 XMFR CUR CONNECTION
8
8-10
Z = 30 ×
1
: "0.80"
: "None"
: "Dy1"
Z = ( 0.127 90° ∠ + 0.006 88°
3
: "2.60"
: "Yd11"
: "None"
13.8 1600
--------- × ---------- - = 0.8011Ω 85° ∠
315 2625
315 1600
--------- ---------- -
∠ ) × × = 2.601Ω 89.4°
13.8 2625
D30 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 8: APPLICATION OF SETTINGS
∠
Eq. 8-9
Eq. 8-10