Rockwell Automation Allen-Bradley E300, User Manual

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Rockwell Automation Publication 193-UM015D-EN-P - February 2015 195
Protective Trip and Warning Functions Chapter 6
Table 234 - Voltage Imbalance Trip Delay (Parameter 366)
Voltage Imbalance Trip Level
Voltage Imbalance Trip Level (Parameter 367) allows you to define the
percentage at which the E300 Electronic Overload Relay trips on a voltage
imbalance. It is user-adjustable from 10…100%.
Table 235 - Voltage Imbalance Trip Level (Parameter 367)
Voltage Imbalance Warning
The E300 Electronic Overload Relay indicates a voltage imbalance warning if:
• No warning currently exists
• Voltage Imbalance Warning is enabled
• Voltage is present
• Voltage Imbalance Inhibit Time has expired
• The Voltage Imbalance (Parameter 61) is greater than the Voltage
Imbalance Warning Level
When the Voltage Imbalance Warning conditions are satisfied, the:
• TRIP/WARN LED flashes a yellow red 1-long / 3-short blink pattern
• Bit 2 in Voltage Warning Status (Parameter 11) sets to 1
• Bit 1 in Device Status 0 (Parameter 20) sets to 1
• Any relay outputs configured as a Warning Alarm close
Default Value 1.0
Minimum Value 0.1
Maximum Value 25.0
Parameter Type USINT
Size (Bytes) 1
Scaling Factor 10
Units Seconds
Default Value 15
Minimum Value 10
Maximum Value 100
Parameter Type USINT
Size (Bytes) 1
Scaling Factor 1
Units %
IMPORTANT
The Voltage Imbalance Inhibit Timer starts after a phase voltage transitions
from 0V to 20V L-L. The E300 Electronic Overload Relay does not begin
monitoring for a voltage imbalance condition until the Voltage Imbalance
Inhibit Time expires.