8.14.2 Application
SEMOD171858-5 v3
Conventional protection functions can not detect the broken conductor condition.
Broken conductor check (BRCPTOC
, 46) function, consisting of continuous current
unsymmetrical check on the line where the IED connected will give alarm or trip at
detecting broken conductors.
8.14.3 Setting guidelines
SEMOD171866-5 v4
Broken conductor check BRCPTOC (46) must be set to detect open phase/s (series
faults) with different loads on the line. BRCPTOC (46) must at the same time be set to
not operate for maximum asymmetry which can exist due to, for example, not
transposed power lines.
All settings are in primary values or percentage.
Set IBase (given in GlobalBaseSel) to power line rated current or CT rated current.
Set minimum operating level per phase Pickup_PH to typically 10-20% of rated
current.
Set the unsymmetrical current, which is relation between the difference of the
minimum and maximum phase currents to the maximum phase current to typical
Pickup_ub = 50%.
Note that it must be set to avoid problem with asymmetry under
minimum operating conditions.
Set the time delay tOper = 5 - 60 seconds and reset time tReset = 0.010 - 60.000
seconds.
8.15 Capacitor bank protection CBPGAPC
GUID-41731DCF-840C-4717-9F51-899FC648F881 v2
8.15.1 Identification
GUID-67FC8DBF-4391-4562-A630-3F244CBB4A33 v2
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Capacitor bank protection CBPGAPC - -
1MRK 511 401-UUS A Section 8
Current protection
Bay control REC670 2.2 ANSI 227
Application manual
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