Stator Ground - GE G30 Instruction Manual

5 SETTINGS
SETTING
DIR POWER 1
FUNCTION:
Enabled = 1
SETTING
DIR POWER 1 BLK:
Off = 0
SETTING
DIR POWER 1 SOURCE:
Three-phase active power (P)
Three-phase reactive power (Q)
Figure 5–93: SENSITIVE DIRECTIONAL POWER SCHEME LOGIC
a) MAIN MENU

PATH: SETTINGS GROUPED ELEMENTS
 STATOR
 GROUND
MESSAGE
Third harmonic neutral undervoltage protection that responds to the third harmonic in the voltage at the machine neutral
point is provided as a means of stator ground protection.
This element is configured through its individual setting menu. The
source used to provide current and voltage signals for stator ground fault protection. The third harmonic neutral undervolt-
age function is configured as follows:
• Phase voltages measured at the terminal of the machine shall be configured as phase VT banks. The element uses
the voltages to measure the power at the machine terminals for power supervision.
• Phase currents measured at the terminal of the machine shall be configured as phase CT banks. The element uses
the currents to measures the power at the machine terminals for power supervision.
• Voltage measured at the neutral of the machine shall be configured as the auxiliary VT bank. The element extracts the
third harmonic of the auxiliary voltage from the source in order to operate.
GE Multilin
SETTINGS SETTING
DIR POWER 1 RCA: DIR POWER 1 STG1
DELAY:
DIR POWER 1
t
PKP
CALIBRATION:
DIR POWER 1 STG1
SMIN:
DIR POWER 1 STG2
FLEXLOGIC™ OPERANDS
SMIN:
DIR POWER 1 STG1 DPO
RUN
DIR POWER 1 STG1 PKP
DIRECTIONAL POWER
CHARACTERISTICS DIR POWER 1 STG2 PKP
DIR POWER 1 STG2 DPO
SETTING
DIR POWER 1 STG2
DELAY:
t
PKP
 
SETTING GROUP 1(6)

STATOR GROUND

SOURCE: SRC1
 3RD HARM NTRL
 UNDERVOLTAGE
G30 Generator Protection System
5.6 GROUPED ELEMENTS
100 ms
100 ms
5.6.14 STATOR GROUND
STATOR GROUND
Range: SRC 1, SRC 2, SRC 3, SRC 4
See page 5–192.
setting specifies a signal
STATOR GROUND SOURCE
FLEXLOGIC OPERANDS
DIR POWER 1 STG1 OP
DIR POWER 1 DPO
DIR POWER 1 PKP
DIR POWER 1 OP
DIR POWER 1 STG2 OP
842003A3.CDR
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5-191