Alstom SHPM 101 - Page 263

SERVICE MANUAL R5888B
QUADRAMHO Chapter 5
Addendum 1
Page 1 of 3
STATIC DISTANCE PROTECTION TYPE SHPM
Calculation of reach settings (A worked example is given in the
application notes)
Station __________________________ Date ____________________________
Circuit __________________________ Engineer ________________________
Panel ___________________________ Contract_________________________
Scheme options __________________ Drawings ________________________
1 GENERAL DATA
1.1 CT RATIO________________________ ________________________
VT RATIO ________________________ ________________________
1.2 LINE SECTION LENGTHS LINE 1 _______________ km
LINE 2 _______________ km
LINE 3 _______________ km
1.3 POSITIVE SEQUENCE LINE IMPEDANCE ___________________ ohms/km
ZERO SEQUENCE LINE IMPEDANCE ___________________ ohms/km
1.4 Ø = Tan
–1
X/R Ø
1
= Ø
0
= ___________________ degrees
1.5 Z (PRIMARY) =
(R
2
+ X
2
)
Z1 = ___________ Z0___________ ohms/km
1.6 Z1 (SECONDARY) = Z1 (PRIMARY) x
CT ratio
VT ratio
= ______________ ohms/km
VT RATIO
Z1 (PRIMARY) = Z1 (SECONDARY) x
CT ratio
VT ratio
= ______________ ohms/km