ABB REG650 - Page 47

Table 39. Accidental energizing protection for synchronous generator AEGGAPC
Function Range or value Accuracy
Operate value, overcurrent (5-900)% of IBase ± 1,0% of I
r
at I<I
r
± 1.0% of I at I>I
r
Reset ratio, overcurrent >95% -
Transient overreach, overcurrent function <20% at τ = 100 ms -
Critical impulse time, overcurrent 10 ms typically at 0 to 2 x I
set
-
Impulse margin time, overcurrent 15 ms typically -
Operate value, undervoltage (2-150)% of UBase ± 0.5% of U
r
at U<U
r
± 0.5% of U at U>U
r
Critical impulse time, undervoltage 10 ms typically at 2 to 0 x U
set
-
Impulse margin time, undervoltage 15 ms typically -
Operate value, overvoltage (2-200)% of UBase ± 0.5% of U
r
at U<U
r
± 0.5% of U at U>U
r
Timers (0.000-60.000) s ± 0.5% ± 25 ms
Table 40. Negative sequence time overcurrent protection for machines NS2PTOC
Function
Range or value Accuracy
Operate value, step 1 and 2, negative sequence overcurrent (3-500)% of IBase ± 1.0% of I
r
at I < I
r
± 1.0% of I at I > I
r
Reset ratio, step 1 and 2 >95% -
Operate time, start 30 ms typically at 0 to 2 x I
set
20 ms typically at 0 to 10 x I
set
-
Reset time, start 40 ms typically at 2 to 0 x I
set
-
Time characteristics Definite or Inverse -
Inverse time characteristic step 1,
2
2
I t K=
K=1.0-99.0 ± 3% or ± 40 ms
1 ≤ K ≤ 20
Reset time, inverse characteristic step 1,
2
2
I t K=
K=0.01-20.00 ± 10% or ± 50 ms
1 ≤ K ≤ 20
Maximum trip delay, step 1 IDMT (0.00-6000.00) s ± 0.5% ± 25 ms
Minimum trip delay, step 1 IDMT (0.000-60.000) s ± 0.5% ± 25 ms
Timers (0.00-6000.00) s ± 0.5% ± 25 ms
Generator protection REG650
1MRK 502 050-BEN B
Product version: 1.3
ABB 47