Table 41. Frequency protection (FRPFRQ)
Characteristic
Value
Operation accuracy
f>/f<
±5 mHz
df/dt
±50 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)
Start time
f>/f<
<80 ms
df/dt
<120 ms
Reset time
<150 ms
Operate time accuracy
±1.0% of the set value or ±30 ms
Table 42. 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
-0.2000...0.2000 × f
n
/s
0.005
Operate Tm Freq
FRPFRQ
80...200000 ms
10
Operate Tm df/dt
FRPFRQ
120...200000 ms
10
Table 43. Three-phase thermal overload protection, two time constants (T2PTTR)
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 x I
n
(at currents
in the range of 0.01...4.00 x I
n
)
Operate time accuracy
1)
±2.0% of the theoretical value or ±0.50 s
1)
Overload current > 1.2 x Operate level temperature
Table 44. Three-phase thermal overload protection, two time constants (T2PTTR) main settings
Parameter
Function
Value (Range)
Step
Temperature rise
T2PTTR
0.0...200.0°C
0.1
Max temperature
T2PTTR
0.0...200.0°C
0.1
Operate temperature
T2PTTR
80.0...120.0%
0.1
Short time constant
T2PTTR
6...60000 s
1
Weighting factor p
T2PTTR
0.00...1.00
0.01
Current reference
T2PTTR
0.05...4.00 × I
n
0.01
Operation
T2PTTR
1 = on
5 = off
-
Voltage Protection and Control
1MRS757058 K
REU615
Product version: 5.0 FP1
32
ABB
Summary of Contents for Relion 615 series
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