Eaton EMR-4000 Installation, Operation And Maintenance Manual page 583

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Testing the dropout ratio of %(I2/I1)

Having tripped the relay in the previous test, now decrease the phase A current. The dropout of » %(I2/I1)« has to be

1% below the » %(I2/I1)« setting.

Successful test result:

The measured trip delays, threshold values, and dropout ratios are within the permitted deviations/tolerances, specified

under Technical Data.

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