GE C70 Instruction Manual page 297

5 SETTINGS
• 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.
Figure 5–68: NEUTRAL DIRECTIONAL OVERCURRENT LOGIC
e) NEUTRAL CURRENT UNBALANCE (ANSI 60N, IEC PVCB/PTOC)

PATH: SETTINGS GROUPED...
 NEUTRAL CURRENT
 UNBALANCE 1
MESSAGE
GE Multilin
 
SETTING GROUP 1(6) NEUTRAL CURRENT
NTRL CUR UNBALCE 1
FUNCTION: Disabled
NTRL CUR UNBALCE 1
BANK SOURCE: SRC 1
C70 Capacitor Bank Protection and Control System
5.6 GROUPED ELEMENTS

NEUTRAL CURRENT UNBALANCE 1(3)
Range: Disabled, Enabled
Range: SRC 1, SRC 2, SRC 3, SRC 4, SRC 5, SRC 6
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