13.5.8.4 Verifying the re-trip mode M12104-36 v6Choose the mode below, which corresponds to the actual case.In the cases below it is assumed that FunctionMode = Current is selected.Checking the case without re-trip,RetripMode =Retrip Off M12104-107 v71. Set RetripMode = Retrip Off.2. Apply the fault condition, including initiation of CCRBRF (50BF), well abovethe set current value.3. Verify that no re-trip, but back-up trip is achieved after set time.4. Disconnect AC and BFI_3P input signals.Checking the re-trip with current check,RetripMode =CB Pos CheckM12104-48 v71. Set RetripMode = CB Pos Check.2. Apply the fault condition, including initiation of CCRBRF (50BF), well abovethe set current value.3. Verify that re-trip is achieved after set time t1 and back-up trip after time t2.4. Apply the fault condition, including initiation of CCRBRF (50BF), with currentbelow set current value.5. Verify that no re-trip and no back-up trip are obtained.6. Disconnect AC and BFI_3P input signals.Checking re-trip without current check M12104-58 v91. Set RetripMode = No CBPos Check.2. Apply the fault condition, including initiation of CCRBRF (50BF), well abovethe set current value.3. Verify that re-trip is achieved after the set time t1, and the back-up trip after timet2.4. Apply the fault condition, including initiation of CCRBRF (50BF), with currentbelow set current value.5. Verify that re-trip is achieved after set time t1, but no back-up trip is obtained.6. Disconnect AC and BFI_3P input signals.13.5.8.5 Verifying the back-up trip mode M12104-146 v5In the cases below it is assumed that FunctionMode = Current is selected.Checking that back-up tripping is not achieved at normal CB trippingM12104-150 v8Use the actual tripping modes. The case below applies to re-trip with current check.1MRK 502 073-UUS A Section 13Testing functionality by secondary injectionGenerator protection REG670 2.2 ANSI and Injection equipment REX060, REX061, REX062 203Commissioning manual
