Breaker Failure Protection Phase Segregated Activation And Output Csprbrf (50Bf) - ABB REL650 Applications Manual

1MRK 506 334-UUS A
7.11
7.11.1
7.11.2
Application manual
Protection
operate time
Normal t
Retrip delay t1
The fault
occurs
Trip and Pickup
CCRBRF
(50BF)
ANSI05000479 V3 EN
Figure 115: Time sequence
Breaker failure protection phase segregated activation
and output CSPRBRF (50BF)
Identification
Function description IEC 61850 identification
Breaker failure CSPRBRF
protection, phase
segregated activation
and output
Application
In the design of the fault clearance system the N-1 criterion is often used. This means that
a fault needs to be cleared even if any component in the fault clearance system is faulty.
cbopen
t after re-trip
cbopen
t
BFPreset
Minimum back-up trip delay t2
Critical fault clearance time for stability
IEC 60617 identification
SYMBOL-U V1 EN
Current protection
Margin
ANSI05000479_3_en.vsd
ANSI/IEEE C37.2 device
number
50BF
3I>BF
Section 7
Time
233