Rockwell Automation 592- E300 Overload Relay User Manual - Manual (Page 178)

178 Rockwell Automation Publication 193-UM015B-EN-P - June 2014
Chapter 5 Protective Trip and Warning Functions
• Bit 1 in Device Status 0 (Parameter 20) will set to 1
• Any relay outputs configured as a Warning Alarm will close
Under kVA Warn Level
Under kVA Warn Level (Parameter 405) allows the user to define the apparent
power (kVA) at which the E300 Electronic Overload Relay will indicate a
warning. It is user-adjustable from 0…2,000,000 kVA.
Table 176 - Under kVA Warn Level (Parameter 405)
Over kVA Trip
The E300 Electronic Overload Relay will trip 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 will flash a red 2-long / 8-short blink
pattern
• Bit 7 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
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
IMPORTANT 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.