Rockwell Automation Publication 193-UM015D-EN-P - February 2015 151
Protective Trip and Warning Functions Chapter 6
Jam Trip
The E300 Electronic Overload Relay trips with a jam indication if:
• No trip currently exists
• Jam Trip is enabled
• Jam Inhibit Time has expired
• The maximum phase current is greater than the Jam Trip Level for a time
period greater than the Jam Trip Delay.
If the E300 Electronic Overload Relay trips on a jam, the:
• TRIP/WARN LED status indicator flashes a red 5-short blink pattern
• Bit 4 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)
Jam Trip Delay
Jam Trip Delay (Parameter 252) allows you to define the time period a jam
condition must be present before a trip occurs. It is adjustable from
0.1…25.0 s.
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)
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