SERVICE MANUAL R5888B
QUADRAMHO Chapter 5
Addendum 1
Page 3 of 3
2.6 Zone 3 ohmic reach (reverse) = __________ ohms (secondary)
Divide the required Zone 3' reach by ZPh to obtain the Zone 3' multiplying factor
(K35 + K36) K33 x K37 = _______________________
K35 = ______________________
K36 = ______________________
K37 = ______________________
2.7 Neutral impedance setting ZN
K4 + K5 + K6 = [(Z0/Z1) –1] x (K1 + K2)/3 = _____________________
K4 = _______________________
K5 = _______________________
K6 = _______________________
2.8 Relay characteristic angles
If ØPh and ØN differ by more than 10° the vector sum of ZPh and ZN should be
found to give the basic ground fault loop impedance and angle.
Øph = ______________________
ØN = ______________________
2.9 Zone 1 extension ohmic reach (if used)
Divide the required Z1X reach by Z1 to obtain the Z1X multiplying factor
K15 = _______________________
2.10 Resistive reach (if quadrilateral characteristic is fitted)
Application engineers must advise the setting RS = ___________
RS =
K3
I
n
K3 = _____________
Fill in the setting check list Figure 8 in the Commissioning Instructions
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