Sel 411L - Table 10.8 Communications Port Commands that Clear Relay Buffers

P.10.28
SEL-411L Relay Protection Manual Date Code 20151029
Basic Relay Operations
Readying the Relay for Field Application
Step 3. Perform point-to-point continuity checks on the circuits
associated with the relay to verify the accuracy and correctness
of the ac and dc connections.
Step 4. Apply power to the relay (see Connecting and Applying
Power).
The green ENABLED LED on the front panel will illuminate.
Step 5. Use an SEL Cable C234A to connect a serial terminal to the
relay.
Step 6. Start the terminal (usually a PC with terminal emulation
software).
Step 7. Establish communication with the relay at Access Level 0.
Step 8. Proceed to Access Level 2 (see Changing the Default
Passwords).
Step 9. Change the default passwords (see Changing the Default
Passwords).
Step 10. Set the DATE and TIME (see Making Simple Settings
Changes).
Step 11. Use test sources to verify relay ac connections (see Relay Test
Connections on page P.11.11)
Step 12. Verify control input connections (see Operating the Relay
Inputs and Outputs and Control Inputs on page P.2.5).
Step 13. Verify control output connections (see Operating the Relay
Inputs and Outputs and Control Outputs on page P.2.6).
Step 14. Perform protection element tests (see Checking Relay
Operation on page P.11.19).
Step 15. Set the relay (see Section 3: Protection Functions).
Step 16. Connect the relay for tripping/closing duty (see AC/DC
Connection Diagrams on page P.2.44).
Step 17. From Access Level 2, use a communications terminal to issue
the commands to clear the relay data buffers (listed in
Table 10.8).
Step 18. Connect the secondary voltage and current inputs (see
Section 2: Installation).
Step 19. Use the MET command or the
ACSELERATOR QuickSet HMI
to view relay metering to confirm secondary connections.
Table 10.8 Communications Port Commands That Clear Relay Buffers
Communications Port Command Ta s k P e r fo rm e d
MET RD Reset demand meter data
MET RP Reset peak demand meter data
MET RE Reset energy meter data
MET RM Reset maximum/minimum meter data
HIS CA Reset event report and history buffers
SER CA Reset Sequential Events Recorder data