ABB RELION RET670, Applications Manual

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Section 17 Logic
17.1 Tripping logic SMPPTRC (94)
IP14576-1 v4
17.1.1 Identification
SEMOD56226-2 v7
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Tripping logic SMPPTRC
1 -> 0
IEC15000314 V1 EN-US
94
17.1.2 Application
M12252-3 v10
All trip signals from the different protection functions shall be routed through the trip
logic. All start signals and directional information can be routed through the trip logic
as well. In its simplest form, the trip logic will only link the TRIP signal to a binary
output and make sure that the pulse time is long enough.
Tripping logic SMPPTRC (94) offers three different operating modes:
• Three-pole tripping for all fault types (3p operating mode)
• Single-pole tripping for single-phase faults and three-pole tripping for multi-phase
and evolving faults (1p/3p operating mode).
• Single-pole tripping for single-pole faults, two-pole tripping for two-pole faults
and three-pole tripping for three-pole faults (1p/2p/3p operating mode).
The logic also issues a three-pole tripping command when phase selection within the
operating protection functions is not possible, or when external conditions request
three-pole tripping. To meet the different double, breaker-and-a-half and other multiple
circuit breaker arrangements, multiple identical SMPPTRC (94) function blocks are
provided within the IED. In such installation, use one instance of SMPPTRC function
per circuit breaker.
If the OHL is connected to the substation via more than one breaker, one SMPPTRC
(94) function block should be used for each breaker. For example when single-pole
1MRK 504 163-UUS A
Section 17
Logic
Transformer protection RET670 2.2 ANSI 839
Application manual