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MiCOM P921/P922/P923 - Schneider - error

MiCOM P921/P922/P923 - Schneider - error

MiCOM P921/P922/P923 - Schneider - error

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Commissioning GuideP92x/EN CM/F22<strong>MiCOM</strong> <strong>P921</strong>/<strong>P922</strong>/<strong>P923</strong> Page 19/265.4.2 <strong>MiCOM</strong> <strong>P922</strong>-<strong>P923</strong> relay parametersOnly configure the frequency for one of the six stages available.[81] FREQUENCY Default valuesSettingsGroup 1 Group 21 st stage activated No No / 81< / 81> ∗ No / 81< / 81> *1 st frequency stage 50 Hz Hz Hz1 st stage time delay 0.04s Secs Secs2 nd stage activated No No / 81< / 81> * No / 81< / 81> *2 nd frequency stage 50 Hz Hz Hz2 nd stage time delay 0.04s Secs Secs3 rd stage activated No No / 81< / 81> * No / 81< / 81> *3 rd frequency stage 50 Hz Hz Hz3 rd stage time delay 0.04s Secs Secs4 th stage activated No No / 81< / 81> * No / 81< / 81> *4 th frequency stage 50 Hz Hz Hz4 th stage time delay 0.04s Secs Secs5 th stage activated No No / 81< / 81> * No / 81< / 81> *5 th frequency stage 50 Hz Hz Hz5 th stage time delay 0.04s Secs Secs6 th stage activated No No / 81< / 81> * No / 81< / 81> *6 th frequency stage 50 Hz Hz Hz6 th stage time delay 0.04s Secs Secs5.4.3 Test example: stage (f1>) or (f1) (overfrequency), then configure it at (81) or (f1) or (tf1) check:1. If time delay (tf1>) is short, gradually increase the frequency from the nominal frequencyfn to the value of the stage (f1>): tripping should occur for a frequency in the range[(f1>) – 10mHz, (f1>) + 10mHz].2. If time delay (tf1>) is long, adjust the frequency to [(f1>) – 50mHz] and check thattripping does not occur. Increase the frequency to 1.2x(f1>) and check that trippingoccurs.3. Gradually reduce the frequency and measure the value of the drop-off stage (f1>): thefunction must reset for a frequency less than or equal to [(f1>) – 50mHz].∗ Delete as appropriate

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