GE L60 Instructions Manual page 414

GROUPED ELEMENTS
The positive-sequence overcurrent advanced fault detector element responds to the increment of the magnitude of the
positive-sequence current over a specified threshold. Thresholds are provided for low-set control of keying and high-set
operation control of tripping.
POS SEQ I_1 FD FUNCTION
fault detectors operate in parallel with the 87PC function. To effectively disable the overcurrent fault detectors under the
main 87PC menu, set their threshold very high.
POS SEQ I_1 FDL PICKUP
operation. The nominal current of the phase CT bank of the relay is 1 pu.
POS SEQ I_1 FDH PICKUP
operation. The nominal current of the phase CT bank of the relay is 1 pu.
— The fault detector is hard-wired to the 87PC scheme. It can be disabled permanently using the function
POS SEQ I_1 BLK
setting or blocked temporarily with this setting. This setting selects a FlexLogic operand that blocks this fault detector
when asserted.
POS SEQ I_1 FD TARGET
function. These targets operate independently from the 87PC targets.
POS SEQ I_1 FD EVENTS
detector function. These events are logged independently from the 87PC events.
5
5.6.3.9 Charge current compensation
SETTINGS  GROUPED ELEMENTS  SETTING GROUP 1(6)  PHASE COMPARISON ELEMENTS  ADVANCED FAULT
DETECTORS  CHARGE CURRENT COMPENSATION
 CHARGE CURRENT
 COMPENSATION
CHARGING CURRENT COMPENSATN
the mixed current used as an operating quantity for fault detectors and square pulses. The voltage signals used for
charging current compensation are taken from source 3 or 4 assigned with the three-phase voltage bank on the L5
voltage bank. As such, it is critical to ensure that three-phase line voltage is assigned to this source and voltage bank
settings are entered correctly. Half (or one-third for the three-terminal line, as defined by the
of the line charging current is subtracted from the line current.
5-206
— This setting enables or disables the positive-sequence overcurrent fault detection. Note that all
— This setting specifies the pickup of the low-set stage of the element used to control the key
— This setting specifies the pickup of the high-set stage of the element used to control the trip
— This setting controls targets of the positive-sequence overcurrent advanced fault detector
— This setting controls event recording of the positive-sequence overcurrent advanced fault
Figure 5-104: Positive-sequence overcurrent advanced fault detector logic
CHARGE CURRENT

COMPENSATN: Disabled
CHARGE COMPENST BLK:

Off
POS SEQ CAPACITIVE

REACTANCE: 0.100 KΩ
ZERO SEQ CAPACITIVE

REACTANCE: 0.100 KΩ
— This setting enables and disables the charging current calculations and corrections of
Range: Disabled, Enabled
Range: any FlexLogic operand
Range: 0.100 to 65.535 kohms in steps of 0.001
Range: 0.100 to 65.535 kohms in steps of 0.001
87PC SCHEME SELECT
L60 LINE PHASE COMPARISON SYSTEM – INSTRUCTION MANUAL
CHAPTER 5: SETTINGS
setting)