Petersenova cívka s regulátorem REG-DP

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Operating Instructions for the Petersen-Coil Regulator

Vydal: EBERLE Controls GmbH

Strana 27 z 272

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130 A). Figure 11: Self-extinguishing current limit accordance with VDE 0228, Part 2 Curve Self-extinguishing current limit for earth-fault residual current for grids with earth-fault compensation. nominal voltage earth fault curren t . Curve Networks with isolated neutral point.Page 27 Applications If detuning specified percentage, the expected reactive current across the faulty section calculated according the following formula ( ) 100 res fix v I v I    (1. Ires equal the grid's capacitive current, when earth fault occurs Ifix Current connected fixed coil grid v Detuning % In very large grids, the values recommended VDE 0228 Part for the self-extinguishing current limit may exceeded (up kV: 110 ca. This curve also applies cable networks with to 20 nominal voltage with small component overhead cables even their neutral point isolated.24) Iv Detuning current (reactive current A Ires Current through the adjustable P-coil the resonance point