ABB Relion 670 Series Applications Manual page 209

1MRK 511 401-UUS F
The value of
long.
The calibration factors for current and voltage measurement errors are set % of rated current/
voltage:
IMagComp5, IMagComp30, IMagComp100
VMagComp5, VMagComp30, VMagComp100
IAngComp5, IAngComp30, IAngComp100
The angle compensation is given as difference between current and voltage angle errors.
The values are given for operating points 5, 30 and 100% of rated current/voltage. The values
should be available from instrument transformer test protocols.
8.14 Broken conductor check BRCPTOC (46)
8.14.1 Identification
Function description
Broken conductor check
8.14.2 Application
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
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.
IBase (given in GlobalBaseSel ) to power line rated current or CT rated current.
Set
Set minimum operating level per phase
Set the unsymmetrical current, which is relation between the difference of the minimum and
maximum phase currents to the maximum phase current to typical
Bay control REC670
Application manual
TD = 0.92 is recommended in generator applications as the trip delay is normally quite
IEC 61850
identification
BRCPTOC
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IEC 60617
identification
-
Pickup_PH to typically 10-20% of rated current.
Current protection
ANSI/IEEE C37.2
device number
46
Pickup_ub = 50% .
Section 8
SEMOD171761-1 v3
SEMOD172362-2 v2
SEMOD171858-5 v3
SEMOD171866-5 v4
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