Table 31. Stub protection STBPTOC (50STB)
Function
Range or value
Accuracy
Operating current
(1-2500)% of
IBase
±
1.0% of I
n
at I
£
I
n
±
1.0% of I at I > I
n
Reset ratio
> 95%
-
Operating time
20 ms typically at 0 to 2 x I
set
-
Resetting time
30 ms typically at 2 to 0 x I
set
-
Critical impulse time
10 ms typically at 0 to 2 x I
set
-
Impulse margin time
15 ms typically
-
Table 32. Pole discrepancy protection CCRPLD (52PD)
Function
Range or value
Accuracy
Operate value, current
asymmetry level
(0-100) %
± 1.0% of I
n
Reset ratio
>95%
-
Time delay
(0.000-60.000) s
± 0.5% ± 25 ms
Table 33. Broken conductor check BRCPTOC (46)
Function
Range or value
Accuracy
Minimum phase current for
operation
(5–100)% of
IBase
± 1.0% of I
n
Unbalance current operation
(50-90)% of maximum
current
± 2.0% of I
n
Timer
(0.00-60.000) s
± 0.5% ± 25 ms
Trip time for pickup function
35 ms typically
-
Reset time for pickup function
30 ms typically
-
Critical impulse time
15 ms typically
-
Impulse margin time
10 ms typically
-
Breaker protection REQ650 ANSI
1MRK 505 269-BUS -
Product version: 1.1
Issued: April 2011
ABB
63
