SERVICE MANUAL R5888B
QUADRAMHO Chapter 1
Contents
19.12 Circuit transformer requirements 19
19.13 Worked example No. 2 21
19.14 Data 21
19.15 Selecting Zone 1 reach 21
19.16 Selecting Zone 2 reach 22
19.17 Selecting Zone 3 Reach 23
19.18 Ground fault compensation settings 23
19.19 Checking minimum relay voltage for a fault at the Zone 1 reach point 24
19.20 Sketching relay characteristics 26
19.21 Circuit transformer requirements 26
APPENDIX A 1
Figure 1: Basic relay characteristics 1
Figure 2: Principle of zone-1 reach line angular compensation 2
Figure 3: Basic-simplified distance scheme logic 3
Figure 4: Z1 EXT-simplified distance scheme logic 4
Figure 5: PUR-simplified scheme logic 5
Figure 6: POR-simplified distance scheme logic (with ‘open terminal’ signal
echo feature) 6
Figure 7: POR-simplified distance scheme logic (with ‘open terminal’ signal
echo feature and week infeed signal echo and trip feature) 7
Figure 8: PUR-simplified distance scheme logic 8
APPENDIX B 1
SKETCHING RELAY CHARACTERISTICS 1
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