Rockwell Automation Publication 193-UM015D-EN-P - February 2015 157
Protective Trip and Warning Functions Chapter 6
Current Imbalance Inhibit Time
Current Imbalance Inhibit Time (Parameter 259) allows you to inhibit a current
imbalance trip and warning from occurring during the motor starting sequence. It
is adjustable from 0…250 s.
Table 193 - Current Imbalance Inhibit Time (Parameter 259)
Current Imbalance Trip
The E300 Electronic Overload Relay trips with a current imbalance indication if:
• No trip currently exists
• Current Imbalance Trip is enabled
• Current is present
• Current Imbalance Inhibit Time has expired
• The Current Imbalance (parameter 52) is greater than the Current
Imbalance Trip Level for a time period greater than the Current Imbalance
Trip D elay.
If the E300 Electronic Overload Relay trips on a current imbalance, the:
• TRIP/WARN LED status indicator flashes a red 7-short blink pattern
• Bit 6 in Current Trip Status (Parameter 4) 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 10
Minimum Value 0
Maximum Value 250
Parameter Type USINT
Size (Bytes) 1
Scaling Factor 1
Units Seconds
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