ABB REM615 ANSI - Page 24

ABB 24
1MAC251744 -PG Rev. A
Issued: 03.01.2010
Motor Protection
REM615 ANSI
Product Version 2.0
Table 33. 
ree-phase overvoltage protection (59) main settings
Parameter Function Value (Range) Step
Pickup range 59 0.05...1.60 x U
n
0.01
Time multiplier 59 0.05...15.00 0.05
De nite time delay 59 40...300000 ms 10
Operating curve type
1)
59 De nite or inverse time
Curve type: 5, 15, 17, 18, 19, 20
1)
For further reference please refer to the Operating characteristics table at the end of the Technical data chapter
Table 34.  ree-phase undervoltage protection (27)
Characteristic Value
Pickup
accuracy
Depending on the frequency of the voltage
measured: f
n
±2Hz
±1.5% of the set value or ±0.002 x U
n
Pickup time
1) 2)
U
Fault
= 0.9 x set Pickup range Minimum Typical Maximum
62 ms 64 ms 66 ms
Reset time < 40 ms
Reset ratio Depends on the set Relative hysteresis
Retardation time < 35 ms
Trip time accuracy in de nite time mode ±1.0% of the set value or ±20 ms
Trip time accuracy in inverse time mode ±5.0% of the theoretical value or ±20 ms
3)
Suppression of harmonics DFT: -50dB at f = n x f
n
,
where n = 2, 3, 4, 5,…
Table 35.  ree-phase undervoltage protection (27) main settings
Parameter Function Value (Range) Step
Pickup range 27 0.05...1.20 x U
n
0.01
Time multiplier 27 0.05...15.00 0.05
De nite time delay 27 60...300000 ms 10
Operating curve type
1)
27 De nite or inverse time
Curve type: 5, 15, 21, 22, 23
1)
Pickup range = 1.0 x U
n
, Voltage before fault 1.1 x U
n
, f
n
= 50 Hz, undervoltage in one phase-to-phase with nominal frequence injected from
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
1)
For further reference please refer to the Operating characteristics table at the end of the Technical data chapter