Cummins generator protection scope statement

Has several decades of history. Cummins Generator Cummins in terms of design or manufacturing has been recognized as a well-known brand, a model of the high-tech world engine field. Next we introduce the the Cummins generator protection scope and features shallowTan:

Equipped with two sets of change in the Cummins generators on both sides of (neutral point side and the export switch side) than the same current transformer connected to the circulation method the phase difference between the flow loop access current relay, in normal or protection short circuit fault occurs outside the range, the neutral point and the outlet side of the current value and phase are the same, no current or a minimum differential current circuit, the relay does not operate;, will produce a loop and when the fault occurs within the scope of protection differential current, when over current relay settings that start the the Cummins generator differential protection action.

Cummins Generator are star connected per phase stator coil into the line side and the end (star point) current is the same as in normal circumstances, when the stator coil failure, interturn short circuit, phase short circuit, bad insulation failure and trailing ends of the stator coil into the line (star point) current is not as large as connected and trailing ends of the feed lines (star point) of the current transformer will produce a current difference, causing differential relay trip, this is the differential protection. The outgoing side of the current transformer is connected to the generator outlet switch before, another pick a place close to the star point, the scope of protection Cummins generator outlet switch to the star point. ; Longitudinal differential protection phase short circuit fault, the main reaction generator stator winding its Lead action on the instantaneous jump generator outlet switch, deexcitation and downtime.

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