10.15
Date Code 20171006 Instruction Manual SEL-400 Series Relays
Testing, Troubleshooting, and Maintenance
Relay Self-Tests
Relay Self-Tests
The relay continuously runs many self-tests to detect out-of-tolerance conditions.
These tests run at the same time as relay protection and automation logic, but do
not degrade relay performance.
The relay provides a number of alarms to indicate different conditions, as shown
in Table 10.5.
The relay reports out-of-tolerance conditions as a status warning or status failure.
For conditions that do not compromise relay protection, yet are beyond expected
limits, the relay issues a status warning and continues to operate. A severe out-of-
tolerance condition causes the relay to declare a status failure and enter a protec-
Figure 10.7 SER Report: QuickSet HMI
Table 10.5 Alarm Relay Word Bits
Alarm Relay
Word Bit
Description
HALARML Latches for any relay failures.
HALARMP Asserts for five seconds when a warning condition occurs.
HALARMA Starts pulsing for five seconds every minute whenever a new warning condi-
tion occurs and continues to pulse until the RST_HAL logic reset is asserted.
RST_HAL Resets the HALARMA operation (similar to the other logic resets in the relay).
HALARM Equivalent to HALARML OR HALARMP.
SETCHG Pulses for one second whenever settings are changed.
GRPSW Pulses for one second whenever groups are switched.
ACCESS This bit is set when a user is logged in at access Level B or higher.
BADPASS Pulses for one second whenever a user enters three successive bad passwords.
SALARM BADPASS OR SETCHG OR GRPSW.
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