Basler Electric BE1-700 - Manual (Page 298)

Periodic Testing
Periodic testing can be performed at regularly scheduled intervals or upon an indication of problems or
questionable operations within the relay. Verifying the integrity of the relay's performance, short of
playback of recorded events, may be necessary by performing certain tests similar to those accomplished
in the acceptance tests. Verification that the relay is measuring signals faithfully, that relay logic is
appropriate, and, that protective elements and equipment (main or auxiliary) operate correctly, are goals
that can be achieved during this type of testing.
Basler Electric recommends that all captured fault records and sequence of event records be analyzed
and kept on file as in-service periodic test results for this particular device. This is an indication that all
protective elements and the associated equipment are operating satisfactorily.
It is not the intent of this manual to elaborate on every conceivable test possible since this would
encroach on individual preferences, techniques, and philosophies. It is the intent to pursue relevant
testing methods to verify this relay meets published design specifications and applicability.
Functional Testing
Functional (or application) testing is significantly more comprehensive in nature and is intended to test
suitability for a particular application. Functional testing also provides a means to familiarize the user with
the logic and operation of this device. Test setups are generally more involved and often times include
ancillary equipment beyond voltage or current source type equipment. While economics may at times
prohibit full functional testing, it is recommended that some application testing be performed when
published specifications lack appropriate detail to satisfy application testing requirements.
Basler Electric performs a thorough and comprehensive functional test of all relays before shipping. This
ensures that this device is within specified tolerances, measures accurately, and operates correctly as
designed.
TESTING AND TROUBLESHOOTING AIDS
Under test or in-service, the BE1-700 provides several ways to check operations, targets, or events. A
continuous self-test monitors the system health and status. The most basic reporting function is targets.
Targets may be viewed through ASCII command interface or through the front panel human-machine
interface (HMI). Fault Summary Reports, Sequence of Events Recorder (SER) Reports, and
Oscillographic Records yield more detail.
Each time a system disturbance occurs in or around this relay zone of protection, it is a test of the relay
performance during the fault. If a questionable operation results in the need for troubleshooting, you have
several ways in which to troubleshoot the relay, the installation, and the overall application.
Performance Testing
Performance testing can be accomplished through the capture and playback of system fault records. In
actual applications, this type of test realizes further confirmation of faithful relay responses during system
disturbances. For specific power system disturbances, relays can be to subject to a re-creation of
captured events with the aid of equipment capable of replicating COMTRADE record files. In these
instances, there is significant merit in testing relays in this manner to assess relay performance. Correct
response of relay action in a performance test is supplemental verification of the conclusions drawn from
functional (or application) tests.
This type of testing verifies not only whether or not the device operated correctly for a particular system
disturbance but also offers additional confirmation of your protection philosophy in this application. It is
beyond the scope of this manual to develop performance tests for this device. For assistance in
developing these types of tests, please consult Basler Electric and your test equipment.
Relay Self-Test
All internal circuitry and software that affect the relay core functionality are monitored by the continuous
self-test diagnostics. For specific relay trouble alarms, the self-test diagnostics force the microprocessor
to reset and try to correct the problem. If unsuccessful, OUTA operates, the Relay Trouble LED on the
front panel turns on, all of the output relays are disabled, internal logic Point ALMREL is set, and the relay
is taken off line. For more information on self-test diagnostics and relay trouble alarms, see Section 6,
Reporting and Alarm Functions, Alarms Function.
13-2 BE1-700 Testing and Maintenance 9376700990 Rev M