Broken Conductor Check Brcptoc - ABB REC670 Applications Manual

Section 8
Current protection
8.14
8.14.1
8.14.2
8.14.3
214
The value of k=0.92 is recommended in generator applications as the trip delay is
normally quite long.
The calibration factors for current and voltage measurement errors are set % of
rated current/voltage:
IAmpComp5, IAmpComp30, IAmpComp100
UAmpComp5, UAmpComp30, UAmpComp100
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.

Broken conductor check BRCPTOC

Identification
Function description
Broken conductor check
Application
Conventional protection functions can not detect the broken conductor condition.
Broken conductor check (BRCPTOC) function, consisting of continuous current
unsymmetrical check on the line where the IED connected will give alarm or trip at
detecting broken conductors.
Setting guidelines
Broken conductor check BRCPTOC must be set to detect open phase/s (series
faults) with different loads on the line. BRCPTOC 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 IP> to typically 10-20% of rated current.
IEC 61850 IEC 60617
identification identification
BRCPTOC -
1MRK 511 401-UEN A
SEMOD171761-1 v3
SEMOD172362-2 v2
ANSI/IEEE C37.2
device number
46
SEMOD171858-5 v3
SEMOD171866-5 v4
Bay control REC670 2.2 IEC
Application manual