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CHAPTER 5: SETPOINTS
5.4 PROTECTION ELEMENTS
GEK-106310-AF
F650 DIGITAL BAY CONTROLLER
5-81
5.4.7 Negative sequence current
The Negative sequence menu incorporates the Negative sequence time overcurrent (46P) element:
5.4.7.1 Negative sequence overcurrent element (46P)
Negative Sequence TOC is an overcurrent protection element that uses the fundamental phasor of the negative sequence
current as input magnitude, calculated from the phase currents. This element can be used for detecting load unbalance in
the system, and for open phase conditions (fallen or broken conductor). The trip can be time delayed by a curve selectable
by setting. The reset can be instantaneous or linear.
Table 5-53: Negative sequence toc element settings
The snapshot event setting enables or disables the snapshot event generation for this element.
SETPOINT > PROTECTION ELEMENT > SETTING GROUP X > Negative Sequence Current > Negative Sequence TOC >
Negative Sequence TOC 1> Negative Sequence TOC 2 > Negative Sequence TOC 3
setting Description
Name
Default Value
Step
Range
Function permission
Function
DISABLED
N/A
[DISABLED – ENABLED]
Pickup level
Pickup Level
1.00
0.01 A
[0.05 : 160.00]
Curve shape
Curve
IEEE Ext Inv
N/A
[See list of curves]
Time Dial
TD Multiplier
1.00
0.01 s
[0.00 : 900.00]
Reset type
Reset
INSTANTANEOUS
N/A
[INSTANTANEOUS – LINEAR]
Snapshot Event generation
Snapshot Events
ENABLED
N/A
[DISABLED – ENABLED]
Содержание F650
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