8.8.8 Technical data
IP10269-1 v1
M12353-1 v13
Table 262: CCRBRF (50BF) technical data
Function Range or value Accuracy
Trip phase current (5-200)% of
lBase
±1.0% of I
n
at I £ I
n
±1.0% of I at I > I
n
Reset ratio, phase current > 95% -
Trip residual current (2-200)% of
lBase
±1.0% of I
n
at I £ I
n
±1.0% of I at I > I
n
Reset ratio, residual current > 95% -
Phase current pickup for blocking of contact
function
(5-200)% of
lBase
±1.0% of I
n
at I £ I
n
±1.0% of I at I > I
n
Reset ratio > 95% -
Trip time for current detection 10 ms typically -
Reset time for current detection 15 ms maximum -
Time delay for re-trip at 0 to 2 x I
set
(0.000-60.000) s ±0.2% or ±15 ms whichever is greater
Time delay for back-up trip at 0 to 2 x I
set
(0.000-60.000) s ±0.2% or ±15 ms whichever is greater
Time delay for back-up trip at multi-phase
pickup at 0 to 2 x I
set
(0.000-60.000) s ±0.2% or ±20 ms whichever is greater
Additional time delay for a second back-up
trip at 0 to 2 x I
set
(0.000-60.000) s ±0.2% or ±20 ms whichever is greater
Time delay for alarm for faulty circuit breaker (0.000-60.000) s ±0.2% or ±15 ms whichever is greater
8.9 Stub protection STBPTOC (50STB)
IP14515-1 v3
8.9.1 Identification
M17108-1 v2
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Stub protection STBPTOC
SYMBOL-T V1 EN-US
50STB
8.9.2 Functionality
M12902-3 v9
When a power line is taken out of service for maintenance and the line disconnector is opened in
multi-breaker arrangements the voltage transformers will mostly be outside on the disconnected
part. The primary line distance protection will thus not be able to trip and must be blocked.
1MRK 502 066-UUS B Section 8
Current protection
533
Technical manual
To Next Page
Loading...
