ABB RED615 - Frequency Protection (FRPFRQ) Main Settings

Table 59. Frequency protection (FRPFRQ) main settings
Parameter Function Value (Range) Step
Operation mode FRPFRQ 1 = Freq<
2 = Freq>
3 = df/dt
4 = Freq< + df/dt
5 = Freq> + df/dt
6 = Freq< OR df/dt
7 = Freq> OR df/dt
Start value Freq> FRPFRQ 0.9000...1.2000 × f
n
0.0001
Start value Freq< FRPFRQ 0.8000...1.1000 × f
n
0.0001
Start value df/dt FRPFRQ -0.200...0.200 × f
n
/s 0.005
Operate Tm Freq FRPFRQ 80...200000 ms 10
Operate Tm df/dt FRPFRQ 120...200000 ms 10
Table 60. Three-phase thermal protection for feeders, cables and distribution transformers (T1PTTR)
Characteristic
Value
Operation accuracy Depending on the frequency of the measured current: f
n
±2 Hz
Current measurement: ±1.5% of the set value or ±0.002 × I
n
(at currents
in the range of 0.01...4.00 × I
n
)
Operate time accuracy
1)
±2.0% of the theoretical value or ±0.50 s
1) Overload current > 1.2 × Operate level temperature
Table 61. Three-phase thermal protection for feeders, cables and distribution transformers (T1PTTR) main settings
Parameter
Function Value (Range) Step
Env temperature Set (Ambient
temperature used when the
AmbSens is set to Off)
T1PTTR -50...100°C 1
Current multiplier (Current
multiplier when function is used for
parallel lines)
T1PTTR 1...5 1
Current reference T1PTTR 0.05...4.00 × I
n
0.01
Temperature rise (End
temperature rise above ambient)
T1PTTR 0.0...200.0°C 0.1
Time constant (Time constant of
the line in seconds)
T1PTTR 60...60000 s 1
Maximum temperature
(temperature level for operate)
T1PTTR 20.0...200.0°C 0.1
Alarm value (Temperature level for
start (alarm)
T1PTTR 20.0...150.0°C 0.1
Reclose temperature
(Temperature for reset of block
reclose after operate)
T1PTTR 20.0...150.0°C 0.1
Initial temperature (Temperature
raise above ambient temperature
at startup)
T1PTTR -50.0...100.0°C 0.1
Line Differential Protection and Control
1MRS756500 K
RED615
Product version: 5.0 FP1
ABB 45