Load Shedding (Lshdpfrq); Load Shedding (Lshdpfrq) Main Settings - ABB REU615 Product Manual

Voltage Protection and Control
REU615
Product version: 4.0
Table 48. Load shedding (LSHDPFRQ)
Characteristic
Operation accuracy
f<
df/dt
Reset time
Operate time accuracy
Table 49. Load shedding (LSHDPFRQ) main settings
Parameter
Load shed mode
Restore mode
Start value Freq
Start value df/dt
Operate Tm Freq
Operate Tm df/dt
Restore start Val
Restore delay time
34
f<
df/dt
< 80 ms
< 120 ms
Function
LSHDPFRQ
LSHDPFRQ
LSHDPFRQ
LSHDPFRQ
LSHDPFRQ
LSHDPFRQ
LSHDPFRQ
LSHDPFRQ
Value
±10 mHz
±100 mHz/s (in range |df/dt| < 5 Hz/s)
± 2.0% of the set value (in range 5 Hz/
s < |df/dt| < 15 Hz/s)
< 150 ms
±1.0% of the set value or ±30 ms
Value (Range)
Freq<
Freq< AND df/dt
Freq< OR df/dt
Disabled
Auto
Manual
0.800...1.200 x Fn
-0.200...-0.005 x Fn
80...200000 ms
120...200000 ms
0.800...1.200 x Fn
80...200000 ms
1MRS757058 D
Step
-
-
0.001
0.005
10
10
0.001
10
ABB