module PM864 3BSE018151R1

module PM864 3BSE018151R1

module PM864 3BSE018151R1

Single- and/or three-phase tripping The single-/three-phase tripping will give single-phase tripping for single-phase faults and three-phase tripping for multi-phase fault.

The operating mode is always used together with a single-phase autoreclosing scheme. The single-phase tripping can include different options and the use of the different inputs in the function block.

The inputs 1PTRZ and 1PTREF are used for single-phase tripping for distance protection and directional earth fault protection as required. The inputs are combined with the phase selection logic and the start signals from the phase selector must be connected to the inputs PSL1, PSL2 and PSL3 to achieve the tripping on the respective single-phase trip outputs TRL1, TRL2 and TRL3.

The Output TRIP is a general trip and activated independent of which phase is involved. Depending on which phases are involved the outputs TR1P, TR2P and TR3P will be activated as well. When single-phase tripping schemes are used a single-phase autoreclosing attempt is expected to follow. For cases where the autoreclosing is not in service or will not follow for some reason, the input Prepare Three-phase Trip P3PTR must be activated.

This is normally connected to the respective output on the Synchrocheck, energizing check, and synchronizing function SESRSYN but can also be connected to other signals, for example an external logic signal. If two breakers are involved, one TR block instance and one SESRSYN instance is used for each breaker. This will ensure correct operation and behavior of each breaker.