Technical Data; Residual Overvoltage Protection Rovptov; Identification; Function Block - ABB RELION REX640 Technical Manual

Section 4
Protection functions
4.5.2.11
4.5.3
4.5.3.1
4.5.3.2
4.5.3.3
782

Technical data

Table 726: PHPTUV Technical data
Characteristic
Operation accuracy
1)2)
Start time
U
value
Reset time
Reset ratio
Retardation time
Operate time accuracy in definite time mode
Operate time accuracy in inverse time mode
Suppression of harmonics
Start value = 1.0 × U
1) , Voltage before fault = 1.1 × U
n
with nominal frequency injected from random phase angle, results based on statistical distribution of
1000 measurements
2) Includes the delay of the signal output contact
Start value = 0.50, Start value multiples in range of 0.90...0.20
3) Minimum

Residual overvoltage protection ROVPTOV

Identification

Function description
Residual overvoltage protection

Function block

GUID-DF5CE7F4-8706-4D63-A7AC-BAB9151DEBBB V1 EN
Figure 427: Function block

Functionality

The residual overvoltage protection function ROVPTOV is used in distribution
networks where the residual overvoltage can reach non-acceptable levels in, for
example, high impedance earthing.
Value
Depending on the frequency of the voltage
measured: f
±1.5% of the set value or ±0.002 × U
Minimum
Start
= 0.9 × set
62 ms
Fault
Typically 40 ms
Depends on the set
<35 ms
±1.0% of the set value or ±20 ms
±5.0% of the theoretical value or ±20 ms
DFT: -50 dB at f = n × f
, f
n n
IEC 61850
identification
ROVPTOV
1MRS759142 C
±2 Hz
n
Typical Maximum
66 ms 70 ms
Relative hysteresis
, where n = 2, 3, 4, 5,...
n
= 50 Hz, undervoltage in one phase-to-phase
IEC 60617 ANSI/IEEE C37.2
identification device number
Uo> 59G/59N
Technical Manual
n
3)
REX640