Set the function block to Program = 3Ph and set the required length of the trip pulse to
for example, tTripMin = 150ms.
For special applications such as Lock-out refer to the separate section below. The
typical connection is shown below in figure
300. Signals that are not used are dimmed.
BLOCK
BLKLKOUT
TRINP_3P
TRINP_A
TRINP_B
TRINP_C
PS_A
PS_B
PS_C
1PTRZ
1PTRGF
P3PTR
SETLKOUT
RSTLKOUT
SMPPTRC (94)
TRIP
TR_A
TR_B
TR_C
TR1P
TR2P
TR3P
CLLKOUT
OR
ANSI05000544-2-en.vsd
Impedance protection zone 1 TRIP
EF4PTOC TRIP
Impedance protection zone 3 TRIP
Impedance protection zone 2 TRIP
ANSI05000544 V2 EN
Figure 300: Tripping logic SMPPTRC (94) is used for a simple three-pole tripping
application
Single- and/or three-pole tripping
The single-/three-pole tripping will give single-pole tripping for single-phase faults and
three-pole tripping for multi-phase fault. The operating mode is always used together
with a single-phase autoreclosing scheme.
The single-pole 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-pole tripping for distance
protection and directional ground fault protection as required.
The inputs are combined with the phase selection logic and the pickup signals from the
phase selector must be connected to the inputs PS_A, PS_B and PS_C to achieve the
tripping on the respective single-pole trip outputs TR_A, TR_B and TR_C. 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.
1MRK504116-UUS C Section 3
IED application
737
Application manual
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