Rockwell Automation Allen-Bradley E300

194 Rockwell Automation Publication 193-UM015D-EN-P - February 2015
Chapter 6 Protective Trip and Warning Functions
• Voltage Imbalance Trip is enabled
• Voltage is present
• Voltage Imbalance Inhibit Time has expired
• The Voltage Imbalance (Parameter 61) is greater than the Voltage
Imbalance Trip Level for a time period greater than the Voltage Imbalance
Trip D elay.
If the E300 Electronic Overload Relay trips on a voltage imbalance, the:
• TRIP/WARN LED status indicator flashes a red 1-long / 3-short blink
pattern
• Bit 2 in Voltage Trip Status (Parameter 5) 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)
Voltage Imbalance Trip Delay
Voltage Imbalance Trip Delay (Parameter 366) allows you to define the time
period a voltage imbalance condition must be present before a trip occurs. It is
adjustable from 0.1…25.0 seconds.
IMPORTANT
The Protection Fault State of Relay 0, Relay 1, Relay 2, Digital Module 1 Output
Relays, Digital Module 2 Output Relays, Digital Module 3 Output Relays, and
Digital Module 4 Output Relays are defined by the respective parameters:
• Output PT00 Protection Fault Action (Parameter 304)
• Output PT00 Protection Fault Value (Parameter 305)
• Output PT01 Protection Fault Action (Parameter 310)
• Output PT01 Protection Fault Value (Parameter 311)
• Output PT02 Protection Fault Action (Parameter 316)
• Output PT02 Protection Fault Value (Parameter 317)
• Output Digital Module 1 Protection Fault Action (Parameter 322)
• Output Digital Module 1 Protection Fault Value (Parameter 323)
• Output Digital Module 2 Protection Fault Action (Parameter 328)
• Output Digital Module 2 Protection Fault Value (Parameter 329)
• Output Digital Module 3 Protection Fault Action (Parameter 334)
• Output Digital Module 3 Protection Fault Value (Parameter 335)
• Output Digital Module 4 Protection Fault Action (Parameter 340)
• Output Digital Module 4 Protection Fault Value (Parameter 342)