Schweitzer Engineering Laboratories SEL-387E - No Prompting Message Issued to Terminal Upon Power up; Relay Does Not Respond to Commands from Device Connected to Ethernet Port; Relay Does Not Respond to Faults; Terminal Displays Meaningless Characters

Date Code 20080110 Testing and Troubleshooting 10-45
SEL-387E Instruction Manual
Relay Does Not Respond to Commands From Device Connected to Ethernet Port
1. Ensure that the communications device is connected to the Ethernet port.
2. Verify relay or communications device parameters such as IP address, port, etc.
3. Check for cabling error.
4. System is processing an event report, wait several seconds.
5. For a possible Ethernet port failure, issue the
STA command from serial port or check front-
panel status to verify that the communications card is functional.
Relay Does Not Respond to Faults
1. Relay improperly set. Review your settings with SET and SET G commands.
2. Improper test settings.
3. Current transformer connection wiring error.
4. Analog input cable between transformer-termination and main board loose or defective.
5. Check self-test status with
STA command.
6. Check input voltages and currents with
MET command and TRI and EVE sequence.
Time Command Displays the Same Time for Successive Commands
1. The digital signal processor has failed.
2. Contact the factory.
Tripping Output Relay Remains Closed Following Fault
1. Auxiliary contact inputs improperly wired.
2. Output relay contacts burned closed.
3. Interface board failure.
No Prompting Message Issued to Terminal Upon Power Up
1. Terminal not connected to system.
2. Wrong baud rate.
3. Terminal improperly connected to system.
4. SET P AUTO setting set to N (factory default).
5. Main board or interface board failure.
Terminal Displays Meaningless Characters
1. Baud rate set incorrectly.
2. Check terminal configuration. See
Section 7: Communications .