GE Multilin 745

S2 System Setup745
Transformer Management Relay
Setpoints
http://www.GEindustrial.com/multilin
5–32
GE Multilin
Windings 1 to 3 PATH: SETPOINTS !" S2 SYSTEM SETUP !" WINDING 1(3)
These setpoints describe the characteristics of each transformer winding and the
CTs connected to them.
The above setpoint options are also available for the second and third winding.
Winding 3 setpoints are only visible if the unit has the appropriate hardware and if
the selected
TRANSFORMER TYPE is 3-winding transformer.
• WINDING 1(3) NOM Φ−Φ VOLTAGE: Enter the nominal phase-to-phase
voltage rating of Winding 1(3) of the transformer. The range for this setpoint is
affected by the
S2 SYSTEM SETUP ! TRANSFORMER !" LOW VOLTAGE WINDING
RATING setting (see table below).
• WINDING 1(3) RATED LOAD: Enter the self-cooled load rating for Winding
1(3) of the transformer. The range for this setpoint is affected by the
S2 SYSTEM
SETUP ! TRANSFORMER !" LOW VOLTAGE WINDING RATING setting (see the table
below).
• WINDING 1(3) PHASE CT PRIMARY: Enter the phase CT primary current
rating of the current transformers connected to Winding 1(3). The CT secondary
current rating must match the relay phase current input rating indicated.
• WINDING 1(3) GROUND CT PRIMARY: Enter the ground CT primary current
rating of the current transformers connected in the Winding 1(3) neutral to
ground path. The CT secondary current rating must match the relay ground
current input rating indicated. This message will only appear if the transformer
type setpoint shows that Winding 1(3) is a wye-connected winding.
• WINDING 1(3) SERIES 3-
Φ RESISTANCE: Enter the series three-phase
resistance of the winding (that is, the sum of the resistance of each of the three
phases for the winding). This value is normally only available from the
transformer manufacturer’s test report, and is used in the 745 for calculation of
harmonic derating factor.
! WINDING 1 [!] WINDING 1 NOM Φ-Φ
VOLTAGE: 220.0 kV
Range: Dependent on LOW VOLTAGE
WINDING RATING
; see below.
MESSAGE
WINDING 1 RATED
LOAD: 100.0 MVA
Range: Dependent on LOW VOLTAGE
WINDING RATING
; see below.
MESSAGE
WINDING 1 PHASE CT
PRIMARY: 500:5 A
Range: 1 to 50000:5 A in steps of 1
MESSAGE
WINDING 1 GROUND CT
PRIMARY: 500:5 A
Range: 1 to 50000:5 A in steps of 1
MESSAGE
WINDING 1 SERIES 3
Φ
RESISTANCE: 10.700 Ω
Range: 0.001 to 50.000 Ω in steps of
0.001
Setting (X = 1, 2, 3) Low Voltage Winding Rating Value
above 5 kV 1 kV to 5 kV below 1 kV
WINDING X NOM Φ−Φ
VOLTAGE
0.1 to 2000.0 kV
in steps of 0.1
0.01 to 200.00
kV in steps of
0.01
0.001 to 20.000
kV in steps of
0.001
WINDING X RATED LOAD
0.1 to 2000.0
MVA in steps of
0.1
0.01 to 200.00
MVA in steps of
0.01
0.001 to 20.000
MVA in steps of
0.001
NOTE