Allen-Bradley E300 User Manual

312 Rockwell Automation Publication 193-UM015E-EN-P - October 2015
Chapter 6 Protective Trip and Warning Functions
Overload Protection
The E300 relay provides overload protection through true RMS current
measurements of the individual phase currents of the connected motor. Based on
the highest current measured, the programmed FLA Setting, and Trip Class, a
thermal model that simulates the actual heating of the motor is calculated.
Percent Thermal Capacity Utilized (Parameter 1) reports this calculated value
and can be read via the communication network.
Overload Trip
The E300 relay trips with an overload indication if:
• No trip currently exists
• Overload trip protection is enabled
• Current is present
• % Th
ermal Capacity Utilized reaches 100%
If
the E300 relay trips on an overload, the following occurs:
• The TRIP/WARN LED flashes a red short-1 blink pattern,
• Bit 0 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
P
rote
ction Fault state (if so programmed)
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)

Allen-Bradley E300 Specifications

General

Type	Electronic Overload Relay
Mounting	DIN Rail or Panel Mount
Protection Class	IP20
Voltage Range	24…690 V AC/DC
Communication Options	EtherNet/IP, DeviceNet
Protection	Overload, phase loss, ground fault
Operating Temperature	-20°C to 60°C