Phase Current - GE L90 Instruction Manual

CHAPTER 5: SETTINGS
Figure 5-127: Load encroachment applied to distance element
LOAD ENCROACHMENT MIN VOLT
the element. When the voltage is below this threshold, a blocking signal is not asserted by the element. When selecting
this setting, remember that the L90 measures the phase-to-ground sequence voltages regardless of the VT connection.
The nominal VT secondary voltage as specified with the
setting is the per-unit base for this setting.
SECONDARY
LOAD ENCROACHMENT REACH
Encroachment Characteristic diagram. Enter this setting in secondary ohms and calculate it as the positive-sequence
resistance seen by the relay under maximum load conditions and unity power factor.
— This setting specifies the size of the blocking region as shown on the Load Encroachment
LOAD ENCROACHMENT ANGLE
Characteristic diagram and applies to the positive-sequence impedance.

5.7.8 Phase current

5.7.8.1 Menu
SETTINGS  GROUPED ELEMENTS  SETTING GROUP 1(6)  PHASE CURRENT
 PHASE CURRENT

L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
— This setting specifies the minimum positive-sequence voltage required for operation of
SYSTEM SETUP  AC INPUTS  VOLTAGE BANK X5  PHASE VT
— This setting specifies the resistive reach of the element as shown in the Load
Figure 5-128: Load encroachment logic
 PHASE TOC1



GROUPED ELEMENTS
See page 5-241
5
5-235