ABB RELION REX640 Technical Manual page 1148

Protection functions
4.12.4.9 SRCPTOC Monitored data
Table 1092: SRCPTOC Monitored data
Name Type
I_RESO_A FLOAT32
I_RESO_B FLOAT32
I_RESO_C FLOAT32
SRCPTOC Enum
4.12.4.10 Technical data
Table 1093: SRCPTOC Technical data
Characteristic
Operation accuracy
Reset time
Retardation time
Retardation time
Operate time accuracy in definite
time mode
Suppression of harmonics
4.12.5 Compensated neutral unbalance voltage protection
CNUPTOV (ANSI 59NU)
4.12.5.1 Identification
Function description
Compensated neutral unbalance
voltage protection
1148
Values (Range) Unit
0.00...40.00 xIn
0.00...40.00 xIn
0.00...40.00 xIn
1=on
2=blocked
3=test
4=test/blocked
5=off
Value
Depending on the frequency of the measured current:
f ±2 Hz
n
Operate value accuracy:
±3 % of the set value or ±0.002 × I
Harmonics)
±1.5 % of the set value or ±0.002 × I
Harmonics < 10th order)
±6 % of the set value or ±0.004 × I
10th order)
Typically 45 ms or maximum 50 ms
Typically 0.96
<35 ms
±1.0 % of the set value or ±20 ms
-50 dB at f = f
IEC 61850
identification
CNUPTOV
Description
Resonance current for
phase A
Resonance current for
phase B
Resonance current for
phase C
Status
(for 2nd order
n
(for 3rd order <
n
(for Harmonics >=
n
n
IEC 60617
identification
CNU>
Technical Manual
1MRS759142 F
ANSI/IEEE C37.2
device number
59NU
REX640