Allen-Bradley E300 - Page 332

332 Rockwell Automation Publication 193-UM015E-EN-P - October 2015
Chapter 6 Protective Trip and Warning Functions
Table 251 - Jam Trip Delay (Parameter 252)
Jam Trip Level
Jam Trip Level (Parameter 253) allows you to define the current at which the
E300 relay trips on a jam. It is user-adjustable from 50…600% of the FLA Setting
(Parameter 171).
Table 252 - Jam Trip Level (Parameter 253)
Jam Warning
The E300 relay indicates a Jam warning if:
• No warning currently exists
• Jam Warning is enabled
• Current is present
• Jam Inhibit Time has expired
• The
ma
ximum phase current is equal to or greater than the Jam Warning
Level
Whe
n the Jam Warning conditions are satisfied, the:
• TRIP/WARN LED flashes a yellow 5-short blink pattern
• Bit 4 in Current Warning Status (Parameter 10) 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 5.0
Minimum Value 0.1
Maximum Value 25.0
Parameter Type USINT
Size (Bytes) 1
Scaling Factor 10
Units Seconds
Default Value 250
Minimum Value 50
Maximum Value 600
Parameter Type UINT
Size (Bytes) 2
Scaling Factor 1
Units %FLA
IMPORTANT
The Jam Inhibitor timer starts after the maximum phase of load current
transitions from 0 A to 30% of the minimum fla SETTING of the device. The
E300 relay does not begin monitoring for a jam condition until the Jam Inhibit
Time expires.