Alstom MiCOM P54 Series - Page 280

P54x/EN OP/La4 Operation
(OP) 5-106 MiCOM P543, P544, P545 & P546
OP
Possible relay maloperation
< Transient time period >
(Char Mod Time)
Time
Calculated
propagation
delay tp
5ms
3.5ms
2ms
Communic-
ation
equipment
Communic-
ation
equipment
Path 1
'go' = 2ms
'return' = 2ms
Path 2
'go' = 5ms
'return' = 5ms
P1031ENb
Figure 73 Switched communication network