4.1.2.3
Single-, two- or three-phase tripping
M14828-15 v5
The single-/two-/three-phase tripping mode provides single-phase tripping for single-phase
faults, two-phase tripping for two-phase faults and three-phase tripping for three-phase
faults. The operating mode is always used together with an autoreclosing scheme with setting
ARMode = 1/2/3 ph or ARMode = 1/2 ph.
The functionality is very similar to the single-phase scheme described above. However, in
addition to the connections for single phase SMBRREC must also be informed that the trip is
two phases by connecting the output TR2P to the input TR2P in the SMBRREC function.
4.1.2.4
Lock-out
M14828-18 v6
The SMPPTRC function block is provided with possibilities to initiate lock-out. The lock-out can
be set to only activate the block closing output CLLKOUT or initiate the block closing output
and also maintain the trip signal output TR3P (latched trip).
The lock-out can then be manually reset after checking the primary fault by activating the
input reset lock-out RSTLKOUT.
If external conditions are required to initiate a closing circuit lock-out but not to lockout trip,
this can be achieved by activating input SETLKOUT. The setting
AutoLock = Off means that the
internal trip will not activate lock-out so only initiation of the input SETLKOUT will result in
lock-out. This is normally the case for overhead line protection where most faults are transient.
Unsuccessful autoreclose and back-up zone tripping can in such cases be connected to initiate
lock-out by activating the input SETLKOUT.
4.1.2.5
Blocking of the function block
M14828-21 v4
Total block of the trip function is done by activating the input BLOCK and can be used to
disable the outputs of the trip logic in the event of internal failures.
4.1.3
Setting guidelines
M12274-3 v9
The parameters for tripping logic SMPPTRC are set via PCM600.
Operation: Sets the mode of operation. Off switches the tripping off. The normal selection is
On.
Program: Sets the required tripping scheme. Normally 3 phase or 1ph/3ph is used.
TripLockout: Sets the scheme for lock-out. Off only activates the closing circuit lock-out
output.
On activates the closing circuit lock-out output and latches the TRIP related outputs.
The normal selection is
Off.
AutoLock: Sets the scheme for lock-out. Off only activates lock-out through the input
SETLKOUT.
On additionally allows lock-out activation via the trip inputs. The normal selection
is
Off.
tTripMin: Sets the required minimum duration of the trip pulse. It should be set to ensure that
the circuit breaker is opened correctly. The normal setting is
0.150s.
tWaitForPHS: Sets a duration during which external phase selection must operate in order to
get a single phase trip, after any of the inputs 1PTRZ or 1PTREF has been activated. If no phase
selection has been achieved, a three-phase trip will be issued after this time has elapsed.
tEvolvingFault: Secures two- or three-pole tripping depending on Program selection during
evolving faults.
Section 4
1MRK 511 445-UEN B
Logic
30
Switchgear control unit SAM600-IO
Application manual
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