BLOCK
Function Enable
TEST-ACTIVE
and
TEST
Block BRCPTOC=Yes
STI
Unsymmetrical
Current Detection
t
tOper
START
IL1<50%IP>
IL2<50%IP>
IL3<50%IP>
IEC09000158-3-en.vsd
or
or
TRIP
and
IEC09000158 V3 EN-US
Figure 63: Simplified logic diagram for Broken conductor check BRCPTOC
6.9.8 Technical data
SEMOD171939-1 v1
SEMOD175200-2 v7
Table 99: BRCPTOC technical data
Function
Range or value Accuracy
Minimum phase current for operation (5–100)% of
IBase
±1.0% of I
r
Unbalance current operation (50–90)% of maximum current ±1.0% of I
r
Independent operate time delay (0.000-60.000) s ±0.2% or ±45 ms
whichever is greater
Independent reset time delay (0.010-60.000) s ±0.2% or ±30 ms
whichever is greater
Start time at current change from I
r
to 0 Min. = 25 ms
Max. = 35 ms
-
Reset time at current change from 0 to I
r
Min. = 5 ms
Max. = 20 ms
-
1MRK 505 384-UEN A Section 6
Current protection
Breaker protection REQ650 2.2 IEC 161
Technical manual