4.5.1.9 Monitored data
Table 579: PHPTOV Monitored data
Name Type Values (Range) Unit Description
START_DUR FLOAT32 0.00...100.00 % Ratio of start time / op-
erate time
PHPTOV Enum
1=on
2=blocked
3=test
4=test/blocked
5=off
Status
4.5.1.10 Technical data
Table 580: PHPTOV 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
23 ms 27 ms 31 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,…
4.5.1.11 Technical revision history
Table 581: PHPTOV Technical revision history
Technical revision Change
B Step value changed from 0.05 to 0.01 for the
Time multiplier
setting.
C Curve Sat relative max range widened from
3.0 to 10.0 % and default value changed from
2.0 to 0.0 %.
D Added setting
Type of time reset
.
4.5.2 Single-phase overvoltage protection PHAPTOV
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
637
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