ABB REM615 ANSI Product Manual page 24

Motor Protection
REM615 ANSI
Product Version 2.0
Table 33. Th ree-phase overvoltage protection (59) main settings
Parameter
Pickup range
Time multiplier
Defi nite time delay
1)
Operating curve type
1) For further reference please refer to the Operating characteristics table at the end of the Technical data chapter
Table 34. Th ree-phase undervoltage protection (27)
Characteristic
Pickup
accuracy
Pickup time 1) 2) U
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)
Pickup range = 1.0 x U , Voltage before fault 1.1 x U
n
random phase angle, results based on statistical distribution of 1000 measurements
2) Includes the delay of the signal output contact
3) Minimum Pickup range = 0.50, Pickup range multiples in range of 0.90 to 0.20
Table 35. Th ree-phase undervoltage protection (27) main settings
Parameter
Pickup range
Time multiplier
Defi nite time delay
1)
Operating curve type
1) For further reference please refer to the Operating characteristics table at the end of the Technical data chapter
24
Function
59
59
59
59
= 0.9 x set Pickup range
Fault
, f = 50 Hz, undervoltage in one phase-to-phase with nominal frequence injected from
n n
Function
27
27
27
27
1MAC251744 -PG Rev. A
Issued: 03.01.2010
Value (Range)
0.05...1.60 x U
n
0.05...15.00
40...300000 ms
Defi nite or inverse time
Curve type: 5, 15, 17, 18, 19, 20
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
62 ms 64 ms
< 40 ms
Depends on the set Relative hysteresis
< 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 ,
n
where n = 2, 3, 4, 5,...
Value (Range)
0.05...1.20 x U
n
0.05...15.00
60...300000 ms
Defi nite or inverse time
Curve type: 5, 15, 21, 22, 23
Step
0.01
0.05
10
n
Maximum
66 ms
3)
Step
0.01
0.05
10
ABB