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From ZG in local Terminal
From ZS in local Terminal
From Z1S/Z1G in local Terminal
810000EBC0 DISCAR_ARCBLOCK
Receipt of trip permission signals
Figure 2.12-1 PUP scheme logic
800000EB55 DISCAR_F.BLOCK
used for the
external carrier communication
used for the
integral carrier communication
Figure 2.12-2 Sending circuit in PUP
2.12.2 Permissive overreach protection (POP)
(i) Application
When a forward overreaching element operates at a terminal, the terminal sends a trip
permission signal to the other opposite terminals. When the forward overreaching element
operates at a terminal, and when a trip permission signal† has been received from an opposite