Basler Electric BE1-11m - Manual (Page 301)

9424200996 Rev L 289
Introduction to Testing
The need to test protection systems to confirm performance as designed by manufacturers has always
existed. However, numeric system 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 device from service, auto switching to backup systems, and
immediate notification of an attended facility. These features have virtually eliminated the need for
periodic maintenance. Simple acceptance tests that verify the integrity of the BE1-11m measuring circuits
and commissioning tests that verify the BE1-11m “electronic wiring” (control logic) are Basler Electric’s
recommended pre-installation tests.
The testing chapters provide guidelines for performing these tests and others. For assistance in
conducting BE1-11m 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 can be performed, all users do not generally perform these tests. Likewise, the
degree to which you will conduct each type of test depends on need, economics, and perceived system
value.
Acceptance Testing
Acceptance testing confirms that a particular BE1-11m delivered to a customer meets published
specifications. Because this is a numerical BE1-11m whose characteristics are defined by software,
Basler Electric does not require the user to test each operational setting in the BE1-11m. Successful
completion of the Acceptance Test verifies proper response of the protection system’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 standards. The BE1-11m is a
microprocessor-based device whose operating characteristics will not change over time. The BE1-11m
will also not experience any change in operating characteristics during transit. However, it remains
important 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 BE1-11m 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 BE1-11m.
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
BE1-11m Introduction to Testing