4.5.2.9
Monitored data
Table 590: PHAPTOV Monitored data
Name
Type
Values (Range)
Unit
Description
START_DUR
FLOAT32
0.00...100.00
%
Ratio of start time / op-
erate time
PHAPTOV
Enum
1=on
2=blocked
3=test
4=test/blocked
5=off
Status
4.5.2.10
Technical data
Table 591: PHAPTOV Technical data
Characteristic
Value
Operation accuracy
Depending on the frequency of the measured voltage: f
n
±2 Hz
±1.5% of the set value or ±0.002 × U
n
Start time ,
U
Fault
= 1.1 × set
Start
value
Minimum
Typical
Maximum
25 ms
28 ms
32 ms
Reset time
Typically 40 ms
Reset ratio
Depends on the set
Relative hysteresis
Retardation time
<35 ms
Operate time accuracy in definite time mode
±1.0% of the set value or ±20 ms
Operate time accuracy in inverse time mode
±5.0% of the theoretical value or ±20 ms
Suppression of harmonics
DFT: -50 dB at f = n × f
n
, where n = 2, 3, 4, 5,…
4.5.3
Three-phase undervoltage protection PHPTUV
4.5.3.1
Identification
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Three-phase undervoltage protec-
tion
PHPTUV
3U<
27
1
Start value = 1.0 × U
n
, Voltage before fault = 0.9 × U
n
, f
n
= 50 Hz, overvoltage in one phase-to-
phase 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
3
Maximum
Start value = 1.20 × U
n
,
Start value multiples in range of 1.10...2.00
1MRS757644 H
Protection functions
620 series
Technical Manual
645
