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5.4 S2 SYSTEM SETUP
LOAD LOSS AT RATED
LOAD: 1250 kW
LOW VOLTAGE WINDING
RATING: Above 5 kV
RATED WINDING TEMP
RISE: 65ºC (oil)
NO LOAD LOSS:
125.0 kW
TYPE OF COOLING:
OA
RATED TOP OIL RISE
OVER AMBIENT: 10ºC
5
XFMR THRML CAPACITY:
1.00 kwh/ºC
WINDING TIME CONST:
2.00 min.
SET ACCUMULATED LOSS
OF LIFE: 0 x 10h
Table 5–3: LOW VOLTAGE WINDING RATING
DESCRIPTION
WINDING x NOM φ-φ
VOLTAGE:
WINDING x RATED
LOAD
MINIMUM TAP POSITION
VOLTAGE
VOLTAGE INCREMENT
PER TAP
Load Loss at Rated Load
No load Loss
5-34
Range: 0 to 20000 in steps of 1
(Auto-ranging; see Table 5–3: LOW VOLTAGE WINDING RATING)
Enter the load loss at rated load. This value is used for calculation of
harmonic derating factor, and in the Insulating Aging function.
Range: Above 5 kV / 1 kV to 5 kV / Below 1 kV
Enter the low voltage winding rating. This selection affects the setpoint
ranges of WINDING (1,2,3) NOM Ø-Ø VOLTAGE, WINDING (1,2,3) RATED LOAD,
MINIMUM TAP POSITION VOLTAGE and VOLTAGE INCREMENT PER TAP shown in
Table 5–3: LOW VOLTAGE WINDING RATING below.
Range: 65ºC (oil) / 55ºC (oil) / 150ºC (dry) / 115ºC (dry) / 80ºC (dry)
This setting determines the type of insulation, for use in the computation of
Insulation Aging.
Range: 0.1 to 2000.0 in steps of 0.1
(Auto-ranging; see Table 5–3: LOW VOLTAGE WINDING RATING)
From the transformer data. It is required for Insulation Aging calculations.
Range: FA / OA / Directed FOA / FOW / Non-Directed FOA/FOW
From Transformer data, required for Insulation Aging calculations.
Range: 1 to 200 (steps of 1)
Required for Insulation Aging calculations
Range: 0.00 to 200.00 (steps of 0.01)
Required for Insulation Aging calculations. Obtain from transformer
manufacturer
Range: 0.25 to 15.00 (steps of 0.01)
Required for Insulation Aging calculations
Range: 0 to 20000 (steps of 1)
Required for Insulation Aging calculations. Set equal to the estimated
accumulated loss of life.
LOW VOLTAGE WINDING RATING
ABOVE 5 kV
1 kV to 5 kV
0.1 to 2000.0
0.01 to 200.00
in steps of 0.1 kV
in steps of 0.01 kV
0.1 to 2000.0
0.01 to 200.00
in steps of 0.1 MVA
in steps of 0.01 MVA
0.1 to 2000.0
0.01 to 200.00
in steps of 0.1 kV
in steps of 0.01 kV
0.01 to 20.00
0.001 to 2.000
in steps of 0.01 kV
in steps of 0.001 kV
1 to 20000
0.1 to 2000.0
in steps of 0.1 KW
in steps of 0.01 KW
0.1 to 2000.0
0.01 to 200.00
in steps of 1 KW
in steps of 0.1 KW
745 Transformer Management Relay
5 SETPOINTS
BELOW 1 kV
0.001 to 20.000
in steps of 0.001 kV
0.001 to 20.000
in steps of 0.001 MVA
0.001 to 20.000
in steps of 0.001 kV
0.0001 to 0.2000
in steps of 0.0001 kV
0.01 to 200.00
in steps of 0.001 KW
0.001 to 20.000
in steps of 0.01 KW
GE Power Management
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