Rockwell-automation 592- E300 Overload Relay User Manual Uživatelský manuál Strana 188

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188 Rockwell Automation Publication 193-UM015B-EN-P - June 2014
Chapter 5 Protective Trip and Warning Functions
Under Power Factor Leading Trip
The E300 Electronic Overload Relay will trip with an Under Power Factor
Leading indication if:
No trip currently exists
Under Power Factor Leading Trip is enabled
Current is present
Voltage is present
Under Power Factor Leading Inhibit Time has expired
The total power factor leading is less than the Under Power Factor Leading
T
r
ip Level for a time period greater than the Under Power Factor Leading
Trip D elay.
If the E300 Electronic Overload Relay trips on an under power factor leading,
the:
T
R
IP/WARN LED status indicator will flash a red 2-long / 11-short
bl
ink pattern
Bit 10 in Power Trip Status (Parameter 6) will set to 1
Bit 0 in Device Status 0 (Parameter 20) will set to 1
Any relay outputs configured as a Trip Relay will open
Any relay outputs configured as a Control Relay will open
Any relay outputs configured as a Trip Alarm will close
Any relay outputs configured as a Normal Relay will be placed in their
P
r
otection Fault state (if so programmed)
IMPORTANT
The Over Power Factor Lagging Warning function does not include a time delay
feature. Once the Over Power Factor Lagging Inhibit Time has expired, the Over
Power Factor Lagging Warning indication is instantaneous.
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