Section 8
1MAC050144-MB C
Measurement functions
584
615 series ANSI
Technical Manual
temporarily stored. If the minimum or maximum is found in tracking and a new magnitude
is stored, also the inactive phase voltages are stored at the same moment, that is, the
inactive phases are not magnitude tracked. The time instant (time stamp) at which the
minimum or maximum magnitude is measured is also temporarily stored for each voltage
phase where variation is active. Finally, variation detection triggers the recorded data
update when the variation activation ends and the maximum duration time is not exceeded.
The data objects to be recorded for PQSS are given in Table 492. There are totally three
data banks, and the information given in the table refers to one data bank content.
The three sets of recorded data available are saved in data banks 1-3. The data bank 1 holds
always the most recent recorded data, and the older data sets are moved to the next banks
(1
→
2 and 2
→
3) when a valid voltage variation is detected. When all three banks have
data and a new variation is detected, the newest data are placed into bank 1 and the data in
bank 3 are overwritten by the data from bank 2.
Figure 312 shows a valid recorded voltage interruption and two dips for the Phase mode
value "Single Phase". The first dip event duration is based on the V_A duration, while the
second dip is based on the time difference between the dip stop and start times. The first
detected event is an interruption based on the V_B duration given in Figure 312. It is
shown also with dotted arrows how voltage time stamps are taken before the final time
stamp for recording, which is shown as a solid arrow. Here, the V_B timestamp is not
taken when the V_A activation starts.
Figure 317:
: Valid recorded voltage interruption and two dips
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Содержание 615 Series ANSI
Страница 1: ...Relion Protection and Control 615 series ANSI Technical Manual ...
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Страница 29: ...1MAC050144 MB C Section 615 series ANSI 22 Technical Manual ...
Страница 389: ...Section 4 1MAC050144 MB C Protection functions 382 615 series ANSI Technical Manual ...
Страница 485: ...Section 6 1MAC050144 MB C Supervision functions 478 615 series ANSI Technical Manual ...
Страница 635: ...Section 10 1MAC050144 MB C Other functions 628 615 series ANSI Technical Manual ...
Страница 707: ...Section 15 1MAC050144 MB C Applicable standards and regulations 700 615 series ANSI Technical Manual ...
Страница 711: ...Section 16 1MAC050144 MB C Glossary 704 615 series ANSI Technical Manual ...
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