EDP SGC Series, Руководство пользователя

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SGC
2.3 SETTINGS
NAME RANGE STEP OTHER
Enabled ON/OFF
Voltage presence threshold 0 – 100% Un 1% Un
Overvoltage Threshold 100 – 250% Un 1% Un
Detection time 0 – 1 s 0,05 s
VP Timer (Tspt) 0-300 s 1 s
Phase Open/Fail Timer (Tfff) 0-300 s 1 s
Sag/Swell detection ON/OFF
Sag threshold 50 – 80% 1% Un
Swell threshold 110 – 150% 1% Un
Sag/Swell Minimum time 0,1 – 1000 ms 10 ms
Sag/Swell limit 5 – 25% 1% Un
Table 17: VPD Settings
2.4 OPERATION
The VPD compares the analog input magnitude with the configured thresholds using a comparator with
hysteresis.
The general Voltage Presence Signal is the logical OR between all each phase presence signal.
There is one Phase Open/Fail alarm which is active when any of the line voltages is outside the
presence-overvoltage threshold. This alarm is disabled in a three-phase undervoltage situation.
The signal outputs are timed versions of the logical signals for filtering out line transients, and avoid false
event logging.
The swell/sag voltage detection unit is monitoring the voltage rate within phases.
When this go out of its nominal range, after passed a minimum time the monitoring of the sag/swell
voltage starts.
In case that a sag/swell event occurs this will be considered a valid event neither the value is over/under
a previous configured limit nor take more time that a configured time.
The limit is defined as an increase in the threshold, that means:
•
Swell threshold = 120% Un
•
Swell limit = +20% Un
•
The swell range will be: 120% Un < U < (120%+20%) Un
When a sag/swell event is validated a log is written with the events and measures with the start/peak/end
values and its related time log.
25
EDP
00110E4