Mode
=
Off
,
Steady
or
Pulse
, and by observing the logic statuses of the corresponding
binary output. Command control functions included in the operation of different built-in
functions must be tested at the same time as their corresponding functions.
11.10
Logic
11.10.1
Tripping logic, common 3-phase output SMPPTRC (94)
Prepare the IED for verification of settings outlined in section
.
This function is functionality tested together with other protection functions (line
differential protection,ground-fault overcurrent protection, and so on) within the IED. It
is recommended that the function is tested together with the autorecloser function, when
built into the IED or when a separate external unit is used for reclosing purposes. The
instances of SMPPTRC (94) are identical except for the name of the function block
SMPPTRC (94). The testing is preferably done in conjunction with the protection system
and autoreclosing function.
11.10.1.1
Three-phase operating mode
1.
Check that
AutoLock
and
TripLockout
are both set to
Disabled
.
2.
Initiate a three-phase fault.
An adequate time interval between the faults should be considered, to overcome a
reset time caused by the possible activation of the Autorecloser function SMBRREC
(79). The function must issue a three-pole trip in all cases, when trip is initiated by
any protection or some other built-in or external function. The following functional
output signals must always appear simultaneously: TRIP, TR_A, TR_B. TR_C and
TR3P.
11.10.1.2
1ph/3ph operating mode
In addition to various other tests, the following tests should be performed. They depend on
the complete configuration of an IED:
Procedure
1.
Make sure that
TripLockout
and
AutoLock
are both set to
Disabled
.
2.
Initiate different single-phase-to-ground faults one at a time.
3.
Initiate different phase-to-phase and three-phase faults.
Section 11
1MRK 511 366-UUS -
Testing functionality by secondary injection
154
Commissioning manual
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