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CHAPTER 5: SETTINGS GROUPED ELEMENTS

L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-319

87L TRIP FORCE 3-Φ — Selects an element forcing three-pole tripping if any type fault occurs when this element is active.

Autoreclosure disabled can be utilized, or the autoreclosure counter if, for example, the second trip is required to be a

three-pole signal. Likewise, any operand representing a change in the power system configuration can be applied.

87L TRIP SEAL-IN — Enables/disables seal-in of the trip signal by measurement of the current flowing. If the single-pole trip

mode is selected and the Trip Out element is applied, set this setting to "Disabled."

87L TRIP SEAL-IN PICKUP — Selects a pickup setting of the current seal-in function.

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GE L90 Specifications

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