ABB REM615 ANSI Product Manual page 26

Motor Protection
REM615 ANSI
Product Version 2.0
Table 39. Negative sequence overvoltage protection (47) main settings
Parameter
Pickup range
Defi nite time delay
Table 40. Ground overvoltage protection (59G)
Characteristic
Pickup
accuracy
1) 2)
Pickup time
Reset time
Reset ratio
Retardation time
Trip time accuracy in defi nite time mode
Suppression of harmonics
1) Residual voltage before fault 0.0 x U
on statistical distribution of 1000 measurements
2) Includes the delay of the signal output contact
Table 41. Ground overvoltage protection (59G) main settings
Parameter
Pickup range
Defi nite time delay
Table 42. Negative phase-sequence current protection (46)
Characteristic
Pickup Accuracy
1) 2)
Pickup time
Reset time
Reset ratio
Retardation time
Trip time accuracy in defi nite time mode
Trip time accuracy in inverse time mode
Suppression of harmonics
1) Negative sequence current before fault = 0.0, f
2) Includes the delay of the signal output contact
3) Maximum Pickup range = 2.5 x I
26
Function
47
47
U = 1.1 x set Pickup range
Fault
, f = 50 Hz, residual voltage with nominal frequency injected from random phase angle, results based
n n
Function
59G
59G
I = 2 x set Pickup range
Fault
I = 10 x set Pickup range
Fault
= 50 Hz, results based on statistical distribution of 1000 measurements
n
, Pickup range multiples in range of 1.5 to 20
n
1MAC251744 -PG Rev. A
Issued: 03.01.2010
Value (Range)
0.010...1.000 x U
n
40...120000 ms
Value
Depending on the frequency of the voltage
measured: f ±2Hz
n
±1.5% of the set value or ±0.002 x U
Minimum Typical
29 ms 31 ms
< 40 ms
Typical 0.96
< 35 ms
±1.0% of the set value or ±20 ms
DFT: -50dB at f = n x f ,
n
where n = 2, 3, 4, 5,...
Value (Range)
0.010...1.000 x U
n
40...300000 ms
Value
Depending on the frequency of the
current measured: f = ±2Hz
n
±1.5% of the set value or ±0.002 x I
Minimum Typical
22 ms 24 ms
14 ms 16 ms
< 40 ms
Typical 0.96
< 35 ms
±1.0% of the set value or ±20 ms
±5.0% of the theoretical value or ±20 ms
DFT: -50dB at f = n x f , where
n
n = 2, 3, 4, 5,...
Step
0.001
1
n
Maximum
32 ms
Step
0.001
1
n
Maximum
25 ms
17 ms
3)
ABB