ABB REM615 ANSI Product Manual page 25

Table 36. Positive sequence undervoltage protection (27PS)
1)
2)
Table 37. Positive sequence undervoltage protection (27PS) main settings
Table 38. Negative sequence overvoltage protection (47)
1)
2)
ABB
Motor Protection
REM615 ANSI
Product Version 2.0
Characteristic
Pickup
accuracy
1) 2)
Pickup time U
Fault
U
Fault
Reset time
Reset ratio
Retardation time
Trip time accuracy in defi nite time mode
Suppression of harmonics
Pickup range = 1.0 x U , Positive sequence voltage before fault 1.1 x U
n
injected from random phase angle, results based on statistical distribution of 1000 measurements
Includes the delay of the signal output contact
Parameter
Pickup range
Defi nite time delay
Voltage block value
Characteristic
Pickup
accuracy
1) 2)
Pickup time
U
Fault
U
Fault
Reset time
Reset ratio
Retardation time
Trip time accuracy in defi nite time mode
Suppression of harmonics
Negative sequence voltage before fault 0.0 x U
phase angle, results based on statistical distribution of 1000 measurements
Includes the delay of the signal output contact
= 0.99 x set Pickup range
= 0.9 x set Pickup range
, f = 50 Hz, positive sequence undervoltage with nominal frequence
n n
Function
27PS
27PS
27PS
= 1.1 x set Pickup range
= 2.0 x set Pickup range
, f = 50 Hz, negative sequence overvoltage with nominal frequence injected from random
n n
1MAC251744 -PG Rev. A
Issued: 03.01.2010
Value
Depending on the frequency of the voltage
measured: fn ±2Hz
±1.5% of the set value or ±0.002 x U
Minimum Typical
51 ms 53 ms
43 ms 45 ms
< 40 ms
Depends on the set Relative hysteresis
< 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...1.200 x U
n
40...120000 ms
0.01...1.0 x U
n
Value
Depending on the frequency of the voltage
measured: fn ±2Hz
±1.5% of the set value or ±0.002 x U
Minimum Typical
33 ms 35 ms
24 ms 26 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,...
n
Maximum
54 ms
46 ms
Step
0.001
10
0.01
n
Maximum
37 ms
28 ms
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