Alstom SHPM 101 - Trip Output Logic

SERVICE MANUAL R5888C
QUADRAMHO Chapter 2
Appendix A
Page 63 of 71
Figure 72: Trip output logic
TRIP A Outputs
94A-1, 94A-2
Z2t
60ms
0
1
Z
1
A'
Z
1
B'
Aided trip A S.O.T.F
Weak infeed aided trip
C.I.S.
1
1
1
&
1
1
1
1
1
Q
S
R
1
Q
S
R
1
Z3t block scheme P.U.R. P.O.R. or
Aided trip B Z
1
C'
TRIP B Outputs
TRIP C Outputs
94B-1, 94B-2
94C-1, 94C-2
Any trip
94-1, 94-2
94T-1, 94T-2
3 Phase trip
1
function
Q
S
R
1
&
&
&
&
&
T.S.N. for 3 phase trips only Aided trip B Aided trip B
Majority