GE L30 Instruction Manual page 456
Line current differential system
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- Instruction manual (698 pages) ,
- Communications manual (532 pages) ,
- Communications manual (526 pages)
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GROUPED ELEMENTS
Output
The outputs from the schemes are:
•
FlexLogic operands that report on the operation of portions of the scheme
•
FlexLogic operand used to re-trip the protected breaker
•
FlexLogic operands that initiate tripping required to clear the faulted zone. The trip output can be sealed-in for an
adjustable period.
•
Target message indicating a failed breaker has been declared
•
Illumination of the front panel Trip LED (and the Phase A, B, or C LED, if applicable)
Main path sequence
5
The current supervision elements reset in less than 0.7 of a power cycle for any multiple of pickup current as shown in the
following figure.
Settings
— This setting is used to select the breaker failure operating mode: single or three pole.
BF1 MODE
BF1 USE AMP SUPV
pickup level.
5-242
Figure 5-122: Breaker failure main path sequence
Figure 5-123: Breaker failure overcurrent supervision reset time
— If set to "Yes," the element is initiated if current flowing through the breaker is above the supervision
L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
CHAPTER 5: SETTINGS
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