GE L90 Instruction Manual page 543
Line current differential system
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Also See for L90:
- Instruction manual (832 pages) ,
- Communications manual (532 pages) ,
- Communications manual (526 pages)
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CHAPTER 5: SETTINGS
GROUPED ELEMENTS
— Selects an element forcing three-pole tripping if any type fault occurs when this element is active.
87L TRIP FORCE 3-Φ
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.
— Enables/disables seal-in of the trip signal by measurement of the current flowing. If the single-pole trip
87L TRIP SEAL-IN
mode is selected and the Trip Out element is applied, set this setting to "Disabled."
— Selects a pickup setting of the current seal-in function.
87L TRIP SEAL-IN PICKUP
5
L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
5-319
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