Alstom SHPM 101 - Quadrilateral Zone 1; Typical Quadrilateral Zone 1 Operating Times

SERVICE MANUAL R5888C
QUADRAMHO Chapter 2
Appendix A
Page 46 of 71
Figure 51: Typical quadrilateral Zone 1 operating times
Figure 50: Quadrilateral Zone 1
IX
IZ
A
1
= V – IZ
B
1
= I
N
R
A
3
= –IZ
B
3
= V+ IR
A
2
= V – IZ
B
2
= –IZ
–IR
θ
A
4
= –IZ
B
4
= V
POL
–IR
I
Minimum operating time contours SIR = 6
R Ω
12345678
X Ω
θ = 75°
21ms
24ms
25ms
29ms
30ms
34ms
60Hz times
50Hz times
34ms
39ms
5
4
3
2
1