ABB Relion 670 Series Product Manual page 48

Busbar protection REB670
Customized
Product version: 1.2
Frequency protection
Table 37. Underfrequency protection SAPTUF
Function
Operate value, start function
Operate time, start function
Reset time, start function
Operate time, definite time function
Reset time, definite time function
Voltage dependent time delay
Exponent
é - ù
U UMin
(
= ×
t tMax tMin
ê ú
ë - û
UNom UMin
EQUATION1182 V1 EN
U=U
measured
Table 38. Overfrequency protection SAPTOF
Function
Operate value, start function
Operate time, start function
Reset time, start function
Operate time, definite time function
Reset time, definite time function
Table 39. Rate-of-change frequency protection SAPFRC
Function
Operate value, start function
Operate value, internal blocking level
Operate time, start function
48
Range or value
(35.00-75.00) Hz
100 ms typically
100 ms typically
(0.000-60.000)s
(0.000-60.000)s
Settings:
UNom=(50-150)% of U
UMin=(50-150)% of U
)
- +
tMin
Exponent=0.0-5.0
tMax=(0.000-60.000)s
(Equation 2)
tMin=(0.000-60.000)s
Accuracy
± 2.0 mHz
-
-
± 0.5% ± 10 ms
± 0.5% ± 10 ms
5% + 200 ms
base
base
Range or value
(35.00-75.00) Hz
100 ms typically at f -0.5 Hz to f
set
100 ms typically
(0.000-60.000)s
(0.000-60.000)s
Range or value
(-10.00-10.00) Hz/s
(0-100)% of UBase
100 ms typically
1MRK505273-BEN D
Accuracy
± 2.0 mHz at
symmetrical three-
phase voltage
+0.5 Hz -
set
-
± 0.5% ± 10 ms
± 0.5% ± 10 ms
Accuracy
± 10.0 mHz/s
± 0.5% of U
r
-
ABB