ABB RELION 615 Series Product Manual page 36

Motor Protection and Control
REM615
Product version: 5.0 FP1
Table 43. Frequency protection (FRPFRQ) main settings
Parameter
Operation mode
Start value Freq>
Start value Freq<
Start value df/dt
Operate Tm Freq
Operate Tm df/dt
Table 44. Negative-sequence overcurrent protection for machines (MNSPTOC)
Characteristic
Operation accuracy
1)2)
Start time
Reset time
Reset ratio
Retardation time
Operate time accuracy in definite time mode
Operate time accuracy in inverse time mode
Suppression of harmonics
1) Negative-sequence current before = 0.0, f
2) Includes the delay of the signal output contact
3) Start value multiples in range of 1.10...5.00
Table 45. Negative-sequence overcurrent protection for machines (MNSPTOC) main settings
Parameter
Start value
Operating curve type
Operate delay time
Operation
Cooling time
36
Function
FRPFRQ
FRPFRQ
FRPFRQ
FRPFRQ
FRPFRQ
FRPFRQ
I = 2.0 × set Start value
Fault
= 50 Hz, results based on statistical distribution of 1000 measurements
n
Function
MNSPTOC
MNSPTOC
MNSPTOC
MNSPTOC
MNSPTOC
Value (Range)
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
0.9000...1.2000 × f
n
0.8000...1.1000 × f
n
-0.2000...0.2000 × f /s
n
80...200000 ms
120...200000 ms
Value
Depending on the frequency of the measured current: f
±1.5% of the set value or ±0.002 × I
Minimum Typical
23 25 ms
Typically 40 ms
Typically 0.96
<35 ms
±1.0% of the set value or ±20 ms
±5.0% of the theoretical value or ±20 ms
DFT: -50 dB at f = n × f , where n = 2, 3, 4, 5,...
n
Value (Range)
0.01...0.50 × I
n
Definite or inverse time
Curve type: 5, 15, 17, 18
100...120000 ms
1 = on
5 = off
5...7200 s
1MRS756890 N
Step
-
0.0001
0.0001
0.005
10
10
n
n
Maximum
28 ms
3)
Step
0.01
10
-
1
ABB