Voltage Elements - GE D30 Instruction Manual

CHAPTER 5: SETTINGS
NEG SEQ DIR OC1 POS-SEQ RESTRAINT
0.125 (in "Neg Sequence" mode) for backward compatibility with revisions 3.40 and earlier. Set it to zero to remove the
restraint. Set it higher if large system unbalances or poor CT performance are expected.
— Select the element characteristic angle (ECA) for the forward direction. The element
NEG SEQ DIR OC1 FWD ECA
characteristic angle in the reverse direction is the angle set for the forward direction shifted by 180°.
NEG SEQ DIR OC1 FWD LIMIT ANGLE
direction.
NEG SEQ DIR OC1 FWD PICKUP
threshold applies to zero-sequence or negative-sequence current based on the
specifying this setting, keep in mind that the design uses a positive-sequence restraint technique.
NEG SEQ DIR OC1 REV LIMIT ANGLE
direction.
— Defines the pickup level for the overcurrent unit in the reverse direction. This pickup
NEG SEQ DIR OC1 REV PICKUP
threshold applies to zero-sequence or negative-sequence current based on the
selecting this setting, keep in mind that the design uses a positive-sequence restraint technique.

5.7.11 Voltage elements

5.7.11.1 Menu
SETTINGS  GROUPED ELEMENTS  SETTING GROUP 1(6)  VOLTAGE ELEMENTS
 VOLTAGE ELEMENTS

D30 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
— Controls the positive-sequence restraint. Set it to 0.063 (in "Zero Sequence" mode) or
— Defines a symmetrical limit angle (in both directions from the ECA) for the forward
— Defines the pickup level for the overcurrent unit in the forward direction. This pickup
— Defines a symmetrical limit angle (in both directions from the ECA) for the reverse
Figure 5-116: Negative-sequence directional OC1 logic
 PHASE

 UNDERVOLTAGE1

 PHASE

 UNDERVOLTAGE3
GROUPED ELEMENTS
setting. When
NEG SEQ DIR OC1 TYPE
setting. When
NEG SEQ DIR OC1 TYPE
See below
5
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