Breaker Failure Protection Ccrbrf - ABB RELION 650 Series Applications Manual

Section 8
Current protection
Table 18:
Curve name
ANSI Extremely Inverse
ANSI Very Inverse
ANSI Normal Inverse
ANSI Moderately Inverse
ANSI/IEEE Definite time
ANSI Long Time Extremely Inverse
ANSI Long Time Very Inverse
ANSI Long Time Inverse
IEC Normal Inverse
IEC Very Inverse
IEC Inverse
IEC Extremely Inverse
IEC Short Time Inverse
IEC Long Time Inverse
IEC Definite Time
User Programmable
ASEA RI
RXIDG (logarithmic)
See chapter "Inverse time characteristics" in Technical Manual for the description of different
characteristics
tPCrv, tACrv, tBCrv, tCCrv : Parameters for customer creation of inverse time characteristic
curve (Curve type = 17). The time characteristic equation is:
æ
ç
ç
[ ] =
t s
ç
ç
è
EQUATION1958 V1 EN-US
tINNonDir is the definite time delay for the non directional earth fault current protection, given
in s.
OpUN> is set On to activate the trip function of the residual over voltage protection.
tUN is the definite time delay for the trip function of the residual voltage protection, given in s.
8.6

Breaker failure protection CCRBRF

162
Inverse time characteristics
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÷
A
÷
+ ×
B InMult
÷
p
æ ö
i
-
C
ç ÷ ÷
è > ø ø
in
1MRK 505 363-UEN A
(Equation 116)
IP14514-1 v6
Application manual