Alstom SHPM 101 - Page 264

SERVICE MANUAL R5888B
QUADRAMHO Chapter 5
Addendum 1
Page 2 of 3
SETTINGS ON RELAY
2.1 Zone 1 ohmic reach = 80% of length of line 1 x Z1 (secondary)
= ___________ ohms
2.2 Select K1 + K2 = 4.8 unless the required reach is less than 4.8 ohms (0.96 ohm if
I
n
= 5A) when a value equal to slightly less than the reach should be chosen.
K1 = ________________ K2 = ________________
ZPh =
K1 + K2
I
n
= _______________ ohms
2.3 Divide the required Zone 1 reach by ZPh to obtain the Zone 1 multiplying factor
(K11 + K12 + K13) K14 = __________________
K11 = __________________
K12 = __________________
K13 = __________________
K14 = __________________
2.4 Zone 2 ohmic reach = 50% section 2 plus section 1
= _________________ ohms (secondary)
Divide the required Zone 2 reach by ZPh to obtain the Zone 2 multiplying factor
(K21 + K22) K24 = _____________________
K21 = ______________________
K22 = ______________________
K24 = ______________________
2.5 Zone 3 ohmic reach (forward) = __________ ohms (secondary)
Divide the required Zone 3 reach by ZPh to obtain the Zone 3 multiplying factor
(K31 + K32) K33 = _____________________
K31 = ______________________
K32 = ______________________
K33 = ______________________