Table 557: PREVPTOC Output signals
Name Type Description
OPERATE BOOLEAN Operate
START BOOLEAN Start
4.4.3.7 Settings
Table 558: PREVPTOC Group settings (Basic)
Parameter Values (Range) Unit Step Default Description
Start value 0.05...1.00 xIn 0.01 0.75 Start value
Operate delay time 100...60000 ms 10 100 Operate delay time
Table 559: PREVPTOC Non group settings (Basic)
Parameter Values (Range) Unit Step Default Description
Operation
1=on
5=off
1=on Operation Off / On
4.4.3.8 Monitored data
Table 560: PREVPTOC Monitored data
Name
Type Values (Range) Unit Description
START_DUR FLOAT32 0.00...100.00 % Ratio of start time / op-
erate time
PREVPTOC Enum
1=on
2=blocked
3=test
4=test/blocked
5=off
Status
4.4.3.9 Technical data
Table 561: PREVPTOC Technical data
Characteristic
Value
Operation accuracy Depending on the frequency of the measured current: f
n
±2 Hz
±1.5% of the set value or ±0.002 × I
n
Start time , I
Fault
= 2.0 × set
Start value
Minimum Typical Maximum
23 ms 25 ms 28 ms
Reset time Typically 40 ms
Reset ratio Typically 0.96
Retardation time <35 ms
Table continues on the next page
1
Negative-sequence current before = 0.0, f
n
= 50 Hz, results based on statistical distribution of
1000 measurements.
2
Includes the delay of the signal output contact.
Protection functions 1MRS757644 H
622 620 series
Technical Manual
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