Broken Conductor Check Brcptoc; Identification; Application; Setting Guidelines - ABB RELION 670 Series Applications Manual

Section 8
Current protection
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.
8.13

Broken conductor check BRCPTOC

8.13.1

Identification

Function description
Broken conductor check
8.13.2

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.
8.13.3

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.
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
Set the time delay
8.14

Capacitor bank protection CBPGAPC

448
IEC 61850
identification
BRCPTOC
Note that it must be set to avoid problem with asymmetry under minimum
operating conditions.
tOper = 5 - 60 seconds and reset time tReset = 0.010 - 60.000 seconds.
IEC 60617
identification
-
IP> to typically 10-20% of rated current.
1MRK 504 152-UEN B
SEMOD171761-1 v3
SEMOD172362-2 v2
ANSI/IEEE C37.2
device number
46
SEMOD171858-5 v3
SEMOD171866-5 v4
Iub> = 50% .
GUID-41731DCF-840C-4717-9F51-899FC648F881 v2
Application manual