GE G60 UR Series, Instruction Manual

Page: 294 / 634

5-162 G60 Generator Protection System GE Multilin
5.6 GROUPED ELEMENTS 5 SETTINGS
5
Figure 5–83: NEUTRAL DIRECTIONAL OVERCURRENT LOGIC
5.6.8 GROUND CURRENT
a) MAIN MENU
PATH: SETTINGS
Ø
GROUPED ELEMENTS
Ö
SETTING GROUP 1(6)
ÖØ
GROUND CURRENT
The G60 relay contains one Ground Time Overcurrent, one Ground Instantaneous Overcurrent, and four Restricted Ground
Fault elements. Refer to Inverse Time Overcurrent Characteristics on page 5–144 for additional information.
„
GROUND CURRENT
„
„
GROUND TOC1
„
See page 5–163.
MESSAGE
„
GROUND IOC1
„
See page 5–164.
MESSAGE
„
RESTRICTED GROUND
„
FAULT 1
See page 5–165.
↓
MESSAGE
„
RESTRICTED GROUND
„
FAULT 4
FLEXLOGIC OPERAND
FLEXLOGIC OPERAND
SETTING
SETTING
SETTING
SETTING
SETTINGS
SETTING
SETTING
NEUTRAL DIR OC1
FUNCTION:
NEUTRAL DIR OC1
SOURCE:
NEUTRAL DIR OC1 POL
VOLT:
NEUTRAL DIR OC1 OP
CURR:
NEUTRAL DIR OC1
POLARIZING:
NEUTRAL DIR OC1 BLK:
NEUTRAL DIR OC1 FWD
LIMIT ANGLE:
NEUTRAL DIR OC1 FWD
ECA:
NEUTRAL DIR OC1 REV
LIMIT ANGLE:
NEUTRAL DIR OC1
OFFSET:
NEUTRAL DIR OC1 FWD
PICKUP:
NEUTRAL DIR OC1 REV
PICKUP:
NEUTRAL DIR OC1 OP
CURR:
NEUTRAL DIR OC1 OP
CURR:
NEUTRAL DIR OC1 FWD
NEUTRAL DIR OC1 REV
Disabled=0
Measured VX
Voltage
Calculated V_0
}
}
Current
Ground Crt (IG)
Zero Seq Crt (I_0)
Dual
NOTE:
1) CURRENT POLARIZING IS POSSIBLE ONLY IN RELAYS WITH
THE GROUND CURRENT INPUTS CONNECTED TO
AN ADEQUATE CURRENT POLARIZING SOURCE
2) GROUND CURRENT CAN NOT BE USED FOR POLARIZATION
AND OPERATION SIMULTANEOUSLY
3) POSITIVE SEQUENCE RESTRAINT IS NOT APPLIED WHEN
_1 IS BELOW 0.8pu I
827077AB.CDR
Off=0
Enabled=1
AND
AND
AND
AND
AND
AND
AND
OR
OR
OR
OR
I G 0.05 pu
3( _0 - K _1 ) PICKUP I I
3( _0 - K _1 ) PICKUP I I
I G PICKUP
I G PICKUP
Voltage Polarization
Current Polarization
-3V_0
3I_0
FWD
FWD
FWD
REV
REV
REV
RUN
RUN
RUN
OR
OR
RUN
1.25 cy
1.5 cy
NEUTRAL DIR OC1 POS-
SEQ RESTRAINT:
NEUTRAL DIR OC1 POS-
SEQ RESTRAINT: