Basler Electric BE1-11m - Manual (Page 317)

9424200996 Rev L 305
Periodic Testing
Because the BE1-11m has extensive internal test capabilities, periodic testing of the protection system
can be greatly reduced. BE1-11m operating characteristics are a function of programming instructions that
do not drift over time. Thus, the user may wish to verify items that the protection system’s self-testing
features cannot completely determine. Periodic testing may consist of the following settings and function
checks:
•
Verify that the setpoints that were proven during commissioning have not been changed.
•
Verify proper interfacing between the inputs and outputs and the rest of the protection and control
system.
•
Verify that the power system analog parameters used by the protection and control functions are
measured accurately.
Settings Verification
Verification of the BE1-11m digital I/O connections can be accomplished in different ways. The method
used depends on your preferences and practices. You may choose to use either of the following two
methods:
•
Repeat the digital I/O connection and label verification under commissioning tests.
•
Monitor SER, status, and fault reports for proper sensing of digital signals and proper output
tripping during normal operation.
Note
In redundant protection systems where multiple relays will trip a given
breaker or other device for a fault, fault record monitoring may not
indicate a failed output contact. The BE1-11m may report that it
energized an output when tripping was actually accomplished by the
redundant relay. In this situation, testing the contact is recommended.
Analog Circuit Verification
Verification of BE1-11m analog measurement circuits can be accomplished in multiple ways and depends
on your preferences and practices. Either of the two following methods may be used:
•
Repeat the acceptance tests by injecting test quantities into the BE1-11m.
•
Use the BE1-11m metering functions to compare the protection system’s measurements with
those made by similar devices that are measuring the same signals. Redundant protection
systems or metering devices can provide this independent confirmation of measured signals. If
the BE1-11m is connected to an integration system, this verification can even be automated and
done on a semi-continuous basis.
BE1-11m Periodic Testing