Breaker Failure (Ansi 50Bf) - GE C60 Instruction Manual

GROUPED ELEMENTS
The ground instantaneous overcurrent element can be used as an instantaneous element with no intentional delay or as a
definite time element. The ground current input is the quantity measured by the ground input CT and is the fundamental
phasor magnitude.
These elements measure the current that is connected to the ground channel of a CT/VT module. The conversion
range of a standard channel is from 0.02 to 46 times the CT rating.
This channel can be equipped with a standard or sensitive input. The conversion range of a sensitive channel is
from 0.002 to 4.6 times the CT rating.
5

5.7.6 Breaker failure (ANSI 50BF)

SETTINGS  GROUPED ELEMENTS  SETTING GROUP 1(6)  BREAKER FAILURE  BREAKER FAILURE 1(4)
 BREAKER FAILURE 1

5-208
Figure 5-105: Ground IOC1 logic
BF1 FUNCTION:

Disabled
BF1 MODE:

3-Pole
BF1 SOURCE:

SRC 1
BF1 USE AMP SUPV:

Yes
BF1 USE SEAL-IN:

Yes
BF1 3-POLE INITIATE:

Off
BF1 BLOCK:

Off
BF1 PH AMP SUPV

PICKUP: 1.050 pu
BF1 N AMP SUPV

PICKUP: 1.050 pu
BF1 USE TIMER 1:

Yes
BF1 TIMER 1 PICKUP

DELAY: 0.000 s
Range: Disabled, Enabled
Range: 3-Pole, 1-Pole
Range: SRC 1, SRC 2, SRC 3, SRC 4
Range: Yes, No
Range: Yes, No
Range: FlexLogic operand
Range: FlexLogic operand
Range: 0.020 to 30.000 pu in steps of 0.001
Range: 0.020 to 30.000 pu in steps of 0.001
Range: Yes, No
Range: 0.000 to 65.535 s in steps of 0.001
C60 BREAKER PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 5: SETTINGS