ABB REL650 - Breaker Failure Protection Phase Segregated Activation and Output CSPRBRF (50 BF)

Time
The fault
occurs
Protection
operate time
Trip and Pickup
CCRBRF
(50BF)
Normal t
cbopen
Margin
Retrip delay t1 t
cbopen
after re-trip
t
BFPreset
Minimum back-up trip delay t2
Critical fault clearance time for stability
ANSI05000479_3_en.vsd
ANSI05000479 V3 EN
Figure 115: Time sequence
7.11 Breaker failure protection phase segregated activation
and output CSPRBRF (50BF)
7.11.1 Identification
Function description
IEC 61850 identification IEC 60617 identification ANSI/IEEE C37.2 device
number
Breaker failure
protection, phase
segregated activation
and output
CSPRBRF
3I>BF
SYMBOL-U V1 EN
50BF
7.11.2 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.
1MRK 506 334-UUS A Section 7
Current protection
233
Application manual