GE P444

Application Notes
P44x/EN AP/Hb
6
MiCOM P40 Agile P442, P444
(AP) 5-
55
Figure 33: Main protection in the BOP Z2 scheme
Figure 34: Logic diagram for the BOP Z2 scheme
Trip logic:
IEC Standard
Carrier
Send
Trip Logic Application
User
setting
BOR2 or BLOCK2 Z4
Z2. CR .T1. ‘Aid Dist Delay’ +
Z1.T1 + Z2.T2 + Z3.T3...
Z1 = 80% ZL BOP Z2