COMBITEST relay test system provides a wide range of testing capabilities. All parts of the COMBIFLEX relay and the overall system can be accessed for testing. COMBITEST also means additional personnel safety during testing.
In a test it is possible to inject signals to the isolated relay in order to observe its performance and operation limits. Problems may thus be discovered before an actual protection operation is called for. A safety feature in COMBITEST is that CT shorting is automatic upon insertion of the test handle into the test switch. No external shorting links are needed on the test handle. Trip circuits are interrupted prior to CT shorting during insertion of the test handle.
The secondary injection test facility can also be used to enable the relay system to receive a simulated or recorded power system event in “play-back” mode. This permits testing of cases, which may have caused confusion or concern in relay operation or lack of operation. Numerical play-back can also be further facilitated using test system simulation software.