Alstom SHPM 101 - Resistive Expansion of Partially Cross-Polarised MHO; Typical MHO Zone 1 Operating Times

SERVICE MANUAL R5888C
QUADRAMHO Chapter 2
Appendix A
Page 38 of 71
Figure 38: Typical MHO Zone 1 operating times
Figures are in SIR’s
01 6 12
24 60
Minimum operating time contours SIR = 6
5
4
3
2
1
R Ω
1 234 567 8
X Ω
19ms
21ms
24ms
30ms
34ms
60Hz times
50Hz times
17ms
θ=75°
Figure 37: Resistive expansion of partially cross-polarised MHO