ABB Relion 670 series - Broken Conductor Check BRCPTOC (46)

S TD S TD S
Old Calculated
= ⋅ + −
( )
⋅1
EQUATION1893-ANSI V1 EN (Equation 509)
Where
S is a new measured value to be used for the protection function
S
old
is the measured value given from the function in previous execution cycle
S
Calculated
is the new calculated value in the present execution cycle
TD is settable parameter
The value of TD=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:
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.
9.12 Broken conductor check BRCPTOC (46)
9.12.1 Identification
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Broken conductor check BRCPTOC - 46
9.12.2 Application
Conventional protection functions can not detect the broken conductor condition. Broken
conductor check (BRCPTOC, 46) function, consisting of continuous current
Section 9 1MRK 506 369-UUS -
Current protection
560 Line distance protection REL670 2.2 ANSI
Application manual