ABB REL 501-C1 2.5 Technical Reference Manual page 199

Serial communication
28 Auxiliary input 2
29 Auxiliary input 3
30 Auxiliary input 4
32 Measurand supervision I
33 Measurand supervision V
35 Phase sequence supervision
36 Trip circuit supervision
37 I>> backup operation
38 VT fusefailure
39 Teleprotection disturbed
46 Teleprotection disturbed
47 Group alarm
48 Earth fault L1
49 Earth fault L2
50 Earth fault L3
51 Earth fault forward, e.g. Iine
52 Earth fault reverse, e.g. bus bar
64 Start/pickup L1
65 Start/pickup L2
66 Start/pickup L3
67 Start/pickup N
68 General trip
69 Trip L1
70 Trip L2
71 Trip L3
72 Trip I>> (back up operation)
73 Fault location X in Ohm
74 Fault forward/line
75 Fault reverse/busbar
76 Teleprotection signal transmitted
77 Teleprotection signal received
78 Zone 1
79 Zone 2
80 Zone 3
81 Zone 4
82 Zone 5
83 Zone 6
84 General start/pickup
Chapter 12
Data communication
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