ABB REB500 - Page 53

1MRK 505 353-UEN Section 6
BP-Additions to base documentation
Application Manual 45
Bay protection functions REB500
Table 53 Definite time over and undervoltage protection 59/27 (PTUV/PTOV)
Function/ Parameter Range/ Value
• Pick-up voltage
0.01 to 2.0 U
N
in steps of 0.01 U
N
• Delay 0.02 to 60 s in steps of 0.01 s
•
Max. operating time without delay 60 ms
· Over- and undervoltage detection
· Single or three-phase measurement with detection of the highest, respectively lowest phase voltage
· 4 independent parameter sets
Accuracies Value
Accuracy of the pick-up setting (at f
N
)
±2% or ±0.005 U
N
• Reset ratio (U ³ 0.1 U
N
)
• overvoltage
• undervoltage
•
• >95%
• <106
Table 54 Three phase current plausibility 46 (PTOC)
Function/ Parameter Range/ Value
• Pick-up differential for sum of internal summation current
0.05 to 1.00 I
N
in steps of 0.05 I
N
• Amplitude compensation for summation CT -2.00 to +2.00 in steps of 0.01
• Delay 0.1 to 60 s in steps of 0.1 s
· Determination of the sum and phase sequence of the 3 phase currents
· 4 independent parameter sets
Accuracies Value
Accuracy of the pick-up setting at rated frequency
±2% I
N
in the range 0.2 to 1.2 I
N
• Reset ratio
³90% whole range
Table 55 Three phase voltage plausibility 47 (PTUV)
Function/ Parameter Range/ Value
• Pick-up differential for sum of internal summation voltage
0.05 to 1.2 U
N
in steps of 0.05 U
N
•
Amplitude compensation for summation VT -2.00 to +2.00 in steps of 0.01
• Delay 0.1 to 60 s in steps of 0.1 s
· Determination of the sum and phase sequence of the 3 phase voltages
· 4 independent parameter sets
Accuracies Value
Accuracy of the pick-up setting at rated frequency
±2% U
N
in the range 0.2 to 1.2 U
N
• Reset ratio
>95% (at U > 0.1 U
N
or I > 0.1 I
N
)