ABB REM630 Product Manual page 34

Motor Protection and Control
REM630
Product version: 1.1
Table 37. Rotor earth-fault protection (MREFPTOC) main settings
Parameter
Alarm start value
Operate start value
Alarm delay time
Operate delay time
Table 38. Negative-sequence overcurrent protection for motors (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 × I
2) Includes the delay of the signal output contact
3) Start value multiples in range of 1.10 to 5.00
Table 39. Negative-sequence overcurrent protection for motors (MNSPTOC) main settings
Parameter
Start value
Operating curve type
Operate delay time
Cooling time
34
Function
MREFPTOC
MREFPTOC
MREFPTOC
MREFPTOC
I = 5.0 x set Start
Fault
value
, f = 50 Hz
n n
Function
MNSPTOC
MNSPTOC
MNSPTOC
MNSPTOC
Values (Range)
0.010 - 2.000
0.010 - 2.000
0.04 - 200.00
0.04 - 200.00
Value
At the frequency f = f
n
±1.5% of the set value or ±0.002 × I
Typical 43 ms (±15 ms)
< 70 ms
Typical 0.96
< 35 ms
±1.0% of the set value or ±35 ms
±5.0% of the theoretical value or ±30 ms
DFT: -50 dB at f = n x f
n
...
Value (Range)
0.01...0.50 pu
ANSI Def. Time
IEC Def. Time
Inv. Curve A
Inv. Curve B
0.10...120.00 s
5...7200 s
1MRS756977 D
Issued: 2011-05-18
Step
0.001
0.001
0.01
0.01
n
3)
, where n = 2, 3, 4, 5,
Step
0.01
-
0.01
1
ABB