Rockwell-automation 592- E300 Overload Relay User Manual Manual de usuario Pagina 102

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102 Rockwell Automation Publication 193-UM015B-EN-P - June 2014
Chapter 5 Protective Trip and Warning Functions
Underload Trip
The E300 Electronic Overload Relay will trip with an underload indication if:
No trip currently exists
Underload Trip is enabled
Current is present
Underload Inhibit Time has expired
Minimum phase current is less than the Underload Trip Level for a time
p
e
riod greater than the Underload Trip Delay.
If the E300 Electronic Overload Relay trips on an underload, the:
TRIP/WARN LED status indicator will flash a red 6-short blink pattern
Bit 5 in Current Trip Status (Parameter 4) will set to 1
Bit 0 in Device Status 0 (Parameter 20) will set to 1
Any relay outputs configured as a Trip Relay will open
Any relay outputs configured as a Control Relay will open
Any relay outputs configured as a Trip Alarm will close
Any relay outputs configured as a Normal Relay will be placed in their
P
r
otection Fault state (if so programmed)
Underload Trip Delay
Underload Trip Delay (Parameter 256) allows the installer to define the time
period an underload condition must be present before a trip occurs. It is
adjustable from 0.1…25.0 s.
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)
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