Neutral Current - GE t60 Instruction Manual

5 SETTINGS
SETTING
PHASE DIR 1
FUNCTION:
Disabled=0
Enabled=1
SETTING
AND
PHASE DIR 1
BLOCK:
Off=0
SETTING
PHASE DIR 1 SOURCE: I 0.05 pu
IA
Seq=ABC Seq=ACB
SETTING
VBC VCB
PHASE DIR 1 POL V
THRESHOLD:
-Use V when V
-Use V memory when
V < Min
V MINIMUM
SETTING
PHASE DIR 1 BLOCK OC
WHEN V MEM EXP:
No
Yes
PHASE B LOGIC SIMILAR TO PHASE A
PHASE C LOGIC SIMILAR TO PHASE A
a) MAIN MENU
PATH: SETTINGS GROUPED ELEMENTS

NEUTRAL CURRENT

MESSAGE
MESSAGE
MESSAGE
MESSAGE
The T60 relay contains six Neutral Time Overcurrent elements, eight Neutral Instantaneous Overcurrent elements, and one
Neutral Directional Overcurrent element. For additional information on the Neutral Time Overcurrent curves, refer to
Inverse TOC Characteristics on page 5–81.
GE Multilin
Min
MEMORY TIMER
1 cycle
1 sec
USE ACTUAL VOLTAGE
USE MEMORIZED VOLTAGE
Figure 5–48: PHASE DIRECTIONAL SCHEME LOGIC
SETTING GROUP 1(6)
NEUTRAL TOC1
↓
NEUTRAL TOC6
NEUTRAL IOC1
↓
NEUTRAL IOC8
NEUTRAL
DIRECTIONAL OC1
T60 Transformer Management Relay
SETTING
PHASE DIR 1 ECA:
AND RUN
0
Vpol
1
I
AND
NEUTRAL CURRENT
See page 5–92.
See page 5–93.
See page 5–94.
5.5 GROUPED ELEMENTS
FLEXLOGIC OPERAND
OR PH DIR1 BLK
FLEXLOGIC OPERAND
PH DIR1 BLK A
OR
FLEXLOGIC OPERAND
PH DIR1 BLK B
FLEXLOGIC OPERAND
PH DIR1 BLK C
827078A6.CDR
5.5.5 NEUTRAL CURRENT
5-91
5