Rockwell Automation Publication 193-UM015D-EN-P - February 2015 229
Protective Trip and Warning Functions Chapter 6
• Bit 1 in Device Status 0 (Parameter 20) sets to 1
• Any relay outputs configured as a Warning Alarm closes
Under kVA Warn Level
Under kVA Warn Level (Parameter 405) allows you to define the apparent power
(kVA) at which the E300 Electronic Overload Relay indicates a warning. It is
user-adjustable from 0…2,000,000 kVA.
Table 280 - Under kVA Warn Level (Parameter 405)
Over kVA Trip
The E300 Electronic Overload Relay trips with an Over kVA indication if:
• No trip currently exists
• Over kVA Trip is enabled
• Current is present
• Voltage is present
• Over kVA Inhibit Time has expired
• The total apparent power (kVA) is greater than the Over kVA Trip Level
for a time period greater than the Over kVA Trip Delay.
If the E300 Electronic Overload Relay trips on an over apparent power (kVA),
the:
• TRIP/WARN LED status indicator flashes a red 2-long / 8-short blink
pattern
• Bit 7 in Power Trip Status (Parameter 6) sets to 1
• Bit 0 in Device Status 0 (Parameter 20) sets to 1
• Any relay outputs configured as a Trip Relay open
• Any relay outputs configured as a Control Relay open
• Any relay outputs configured as a Trip Alarm close
• Any relay outputs configured as a Normal Relay are placed in their
Protection Fault state (if so programmed)
Default Value 0.000
Minimum Value 0.000
Maximum Value 2,000,000.000
Parameter Type DINT
Size (Bytes) 4
Scaling Factor 1000
Units kVA
The Under kVA Warning function does not include a time delay feature. Once
the Under kVA Inhibit Time has expired, the Under kVA Warning indication is
instantaneous.
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