Basler Electric BE1-700 - Manual (Page 297)

SECTION 13
• TESTING AND MAINTENANCE
GENERAL
The need to test protective relays to confirm performance as designed by relay manufacturers has always
existed. However, numeric relay design is changing the industry testing paradigms that have been in use
since the first protective relay was built. Each time a fault occurs, the numeric protection system is tested,
and because of its fault and event recording capability, the test is documented. In the unlikely event of a
protection system problem, continuous monitoring along with remote communications capability provide
for removing the affected relay from service, auto switching to backup systems, and immediate
notification of a manned facility. These features have virtually eliminated the need for periodic
maintenance. Simple acceptance tests that verify the integrity of the relays measuring circuits and
commissioning tests that verify the relays "electronic wiring" (control logic) are Basler Electric's
recommended pre-installation tests.
This section provides guidelines for performing these tests and others. It also provides guidelines for care,
handling, and troubleshooting of the BE1-700 relay. For assistance in conducting relay self-tests and
troubleshooting using internal diagnostics, contact Basler Electric Technical Support Services.
TESTING PHILOSOPHIES
Testing is generally divided into the following categories:
• Acceptance
• Commissioning
• Periodic (user scheduled maintenance)
• Functional
While all types of tests may be performed, all users do not generally perform them. Likewise, the degree
to which you will conduct each type of test depends on need, economics, and perceived system value.
Acceptance Testing
Acceptance testing is intended to confirm that a particular relay delivered to a customer meets published
specifications. Because this is a numerical relay whose characteristics are defined by software, Basler
Electric does not require the user to test each operational setting in the relay. Successful completion of
the Acceptance Test verifies proper response of the relay's input and output circuits as well as its
response to all external sensing input quantities (voltage, current, frequency).
Basler Electric performs detailed acceptance testing on all devices to verify all functions meet published
specifications. All products are packaged and shipped with the strictest of standards. The BE1-700 relay
is a microprocessor-based relay whose operating characteristics will not change over time. The relay will
also not experience any change in operating characteristics during transit. However, it remains material
that the user perform these acceptance tests to verify the device has not suffered any degradation in
transit. Basler Electric warrants all products against any decay in performance outside of the published
specified tolerances that result from problems created during transit.
Commissioning Testing
Commissioning testing verifies all physical connections and functional aspects of the protective relay for a
new installation. This includes a thorough review and documentation of the operational settings to verify
that the users calculated values match the actual values on each enabled protection element of the relay.
All of the following connections or functions can be verified during commissioning tests:
• Proper connection and sensing of current and voltage signals as applicable
• Connections of I/O contacts
• I/O sensing versus virtual sensing
• Setting validation
• Proper operation of equipment (main or auxiliary)
• Proper alarming (to SCADA) and/or targeting
9376700990 Rev M BE1-700 Testing and Maintenance 13-1