Technical Data; Three-Phase Undervoltage Protection Phptuv; Identification; Function Block - ABB RELION REX640 Technical Manual

Section 4
Protection functions
4.5.1.11
4.5.2
4.5.2.1
4.5.2.2
4.5.2.3
774

Technical data

Table 714: PHPTOV 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 = 0.9 × 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 = 1.20 × U
3) Maximum

Three-phase undervoltage protection PHPTUV

Identification

Function description
Three-phase undervoltage protection

Function block

GUID-095CAC5F-308C-491C-9E0F-5642EDAFC217 V1 EN
Figure 424: Function block

Functionality

The three-phase undervoltage protection function PHPTUV is used to disconnect
from the network devices, for example electric motors, which are damaged when
subjected to service under low voltage conditions. PHPTUV includes a settable value
for the detection of undervoltage either in a single phase, two phases or three phases.
Value
Depending on the frequency of the measured
voltage: f
±1.5% of the set value or ±0.002 × U
Minimum
Start
= 1.1 × set
23 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
Start value multiples in range of 1.10...2.00
,
n
IEC 61850
identification
PHPTUV
1MRS759142 C
±2 Hz
n
Typical
27 ms
Relative hysteresis
, where n = 2, 3, 4, 5,...
n
= 50 Hz, overvoltage in one phase-to-phase
n
IEC 60617 ANSI/IEEE C37.2
identification device number
3U< 27
Technical Manual
n
Maximum
31 ms
3)
REX640