GE F60 Instruction Manual page 409
Feeder protection system
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CHAPTER 5: SETTINGS
•
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 faceplate Trip LED (and the Phase A, B, or C LED, if applicable)
Main path sequence
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.
Figure 5-122: Breaker failure overcurrent supervision reset time
Settings
— This setting is used to select the breaker failure operating mode: single or three pole.
BF1 MODE
— If set to "Yes," the element is initiated if current flowing through the breaker is above the supervision
BF1 USE AMP SUPV
pickup level.
— If set to "Yes," the element is sealed-in if current flowing through the breaker is above the supervision
BF1 USE SEAL-IN
pickup level.
— This setting selects the FlexLogic operand that initiates three-pole tripping of the breaker.
BF1 3-POLE INITIATE
F60 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL
Figure 5-121: Breaker failure main path sequence
GROUPED ELEMENTS
5
5-235
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