ABB Relion 670 series REC670 - Page 48

Frequency protection
Table 46. Underfrequency protection SAPTUF
Function Range or value Accuracy
Operate value, start function (35.00-75.00) Hz ± 2.0 mHz
Operate time, start function 100 ms typically -
Reset time, start function 100 ms typically -
Operate time, definite time function (0.000-60.000)s ± 0.5% ± 10 ms
Reset time, definite time function (0.000-60.000)s ± 0.5% ± 10 ms
Voltage dependent time delay
( )
Exponent
U UMin
t tMax tMin tMin
UNom UMin
-
= × - +
-
é ù
ê ú
ë û
EQUATION1182 V1 EN (Equation 3)
U=U
measured
Settings:
UNom=(50-150)% of U
base
UMin=(50-150)% of U
base
Exponent=0.0-5.0
tMax=(0.000-60.000)s
tMin=(0.000-60.000)s
5% + 200 ms
Table 47. Overfrequency protection SAPTOF
Function Range or value Accuracy
Operate value, start function (35.00-75.00) Hz ± 2.0 mHz at
symmetrical three-
phase voltage
Operate time, start function 100 ms typically at f
set
-0.5 Hz to f
set
+0.5 Hz -
Reset time, start function 100 ms typically -
Operate time, definite time function (0.000-60.000)s ± 0.5% ± 10 ms
Reset time, definite time function (0.000-60.000)s ± 0.5% ± 10 ms
Table 48. Rate-of-change frequency protection SAPFRC
Function
Range or value Accuracy
Operate value, start function (-10.00-10.00) Hz/s ± 10.0 mHz/s
Operate value, internal blocking level (0-100)% of UBase ± 0.5% of U
r
Operate time, start function 100 ms typically -
Bay control REC670
1MRK511232-BEN E
Pre-configured
Product version: 1.2
48 ABB