Technical Data Schedule
The following Technical Schedule shall be filled out for the transformer rating.
Technical Data Schedule for 630 kVA Distribution Transformer
#
Description
Unit
1
International standards transformer complies with
-
2
Nominal frequency
Hz
3
Rated Power
4
Nominal primary voltage
kV
5
Nominal secondary voltage
V
6
Rated primary voltage
kV
7
Rated secondary voltage
V
8
Type of cooling
-
9
Vector group
-
10
Number of steps
Tap changing
11
kVA
± steps
Tapping range
±%
Current
kA
Duration
s
12
Rated short circuit current
and withstanding duration
13
Impedance measured at 75 C and center tap
%
14
X/R ratio
25 % overload
15
Duration of overload
C
minutes
C
50% overload
minutes
16
Design maximum outdoor temperature
C
17
Design continuous ambient temperature
C
18
Thermal Characteristics
19
20
21
22
23
Magnetic flux density
Core Losses
Winding losses
No load current
Regulation: full load, PF=1
Average winding temperature rise
C
Maximum average temperature rise
C
Maximum hot spot temperature rise
C
Hot-spot to top-oil temperature
gradient
C
Tesla
W
W
A
%
Data
#
Description
Silicon steel
#
Manufacturer
Type and grade
Operating flux density
Losses kW/kg at operating flux density
Manufacturer’s data sheet supplied
Description
25
Tesla
kW/kg
Yes/No
Unit
Manufacturer/Supplier and type
Conductor for HV winding Conductor Material
Shape and cross sectional area
26
Manufacturer/Supplier and type
Conductor for LV winding Conductor Material
Shape and cross sectional area
27
Manufacturer/Supplier
HV Bushing
Type and grade
Bushing catalogue number
28
Manufacturer/Supplier
LV Bushing
Type and grade
Bushing catalogue number
29
Bushing basic impulse
level
30
Bushing power frequency
withstand voltage
31
HV Bushing
kV
HV Bushing
kV
LV Bushing
kV
Type and metal used in HV terminal
Terminals
Type and metal used in LV terminal
Type of metal used in Earth terminal
32
Minimum phase to phase clearance
mm
33
Minimum phase to earth clearance
mm
34
Spring and lock washers included
Yes/No
35
Manufacturer/supplier
Type
Tap changer
36
Catalogue details attached
Yes/No
Manufacturers data sheet attached
Yes/No
Can tap changer switch be locked
37
Tank material
Tank Fabrication
Data
%
full load, PF=0.85
24
Unit
Thickness of the metal sheet
Yes/No
Data
38
Tank Dimensions
39
Transformer weights
Painting method details attached
Width
Yes/No
mm
Height
mm
Depth
mm
Weight of core and windings
kg
Weight of tank
kg
Weight of oil at 20 C
Total weight of transformer, ready for
kg
service
Shipping weight of transformer
Signature: ___________________ Company Seal
kg
kg