Ground Current - GE G30 Instruction Manual

5.6 GROUPED ELEMENTS
• NEUTRAL DIR OC1 FWD PICKUP: This setting defines the pickup level for the overcurrent unit of the element in the
forward direction. When selecting this setting it must be kept in mind that the design uses a 'positive-sequence
restraint' technique for the "Calculated 3I0" mode of operation.
• NEUTRAL DIR OC1 REV LIMIT ANGLE: This setting defines a symmetrical (in both directions from the ECA) limit
angle for the reverse direction.
• NEUTRAL DIR OC1 REV PICKUP: This setting defines the pickup level for the overcurrent unit of the element in the
reverse direction. When selecting this setting it must be kept in mind that the design uses a positive-sequence restraint
technique for the "Calculated 3I0" mode of operation.
Proper application of this element requires that the operating current and the polarizing voltage (or current) be mea-
sured from the same side of the transformer.
NOTE
5
a) MAIN MENU

PATH: SETTINGS GROUPED ELEMENTS
 GROUND CURRENT

5-174
Figure 5–66: NEUTRAL DIRECTIONAL OVERCURRENT LOGIC

SETTING GROUP 1(6)
 GROUND TOC1

G30 Generator Protection System


GROUND CURRENT

See page 5–176.
5 SETTINGS
5.6.6 GROUND CURRENT
GE Multilin