Technical Data - ABB RELION REX640 Technical Manual

1MRS759142 C
4.12.4.10
4.12.5
4.12.5.1
4.12.5.2
4.12.5.3
REX640
Technical Manual

Technical data

Table 990: SRCPTOC Technical data
Characteristic
Operation accuracy
Reset time
Retardation time
Retardation time
Operate time accuracy in definite time mode
Suppression of harmonics
Compensated neutral unbalance voltage protection
CNUPTOV
Identification
Function description
Compensated neutral unbalance
voltage protection
Function block
GUID-64E3F1D5-E615-4028-B1E8-DD8D4969AF75 V1 EN
Figure 565: Function block
Functionality
The compensated neutral unbalance voltage protection function CNUPTOV detects
overvoltage at the neutral point of the shunt capacitor. A blown fuse or a short-
circuited capacitor element results in unbalance in the shunt capacitor bank causing
increase in neutral point voltage. With CNUPTOV, an inherent capacitor bank
Protection functions
Value
Depending on the frequency of the measured
current: fn ±2 Hz
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
n
IEC 61850 IEC 60617
identification identification
CNUPTOV CNU>
Section 4
nd
(for 2 order
n
rd
(for 3 order
n
(for Harmonics
n
ANSI/IEEE C37.2
device number
59NU
1051