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Properties of the Large Transformers
Program
for Design of Distribution & Power Transformers
 |
| Languages |
English, French, German,
Italian and Spanish |
| Units |
Metric and USA units |
| Power range per
phase at 50/60 Hz |
0.1kVA...10MVA per
phase |
| Frequency range |
10Hz ...1000Hz |
| Input /Output
voltage range and form |
1V ...110kV,
independent of the form (sine wave, rectangular,...), included max 5
voltage harmonics |
| Primary/Secondary |
Max. 8 windings,
which can be declared as primary or secondary,
connected in parallel or in series |
| Output current |
Max. 100kA, included max 5
current harmonics |
|
Vertical and horizontal
cooling channel |
To each winding can be assigned 7
combinations of cooling channel and insulation, in front/back or/and
in the window of the core: WIW, WCW, WICW, WCIW, WCICW, WICIW,
WICICIW, where:
I => Insulation
C => Cooling channel
W => Windung
and
using horizontal cooling channel or insulation between sectors, discs or
turns |
| Wire |
Cu and Al , round
wires, flat wires and foil, litz, with 3 insulation grades.
The wires, which do not exist in the wire data base can
be created by user |
| Steels |
Cold rolled, grain
oriented, Ni-Fe,Co-Fe, amorphous and ferrites |
| Windings
technology |
Concentric, disc and "screw" within max 8 sectors
per winding; round, oval or rectangular form |
| Cabinet |
Closed, open on
the top and bottom, ventilated (open and closed) |
|
Core assembly
 |
Alternately
stacked EI,UI,..., welded, ready cores, modulus cores and
alternately stacked strips. The cross section of the limb
and of the yoke can be used rectangular,
"round" and oval (max. 8 steps)
The cores, which do not exist in the core data base can
be created by user or optimized by program for min. price at precribed
Ucc and losses. |
| Ventilation |
Max. 5 m/sec, inside and
outside of the cooling channels |
| Impregnation |
Dry, one component
varnish and 2 components varnish, under vacuum. |
| Duty cycle
operation mode |
With 2 times and 2 loads, per each winding |
|
Magnetic fields
 |
Numerical calculation of the magnetic
fields allows precise calculation of :
- eddy current losses
- steel losses
- short circuit voltage and
- transposition. |
| Criterion of the
design: |
Winding losses 1% to 10%
or
Temperature rise in nominal, short-circuit or duty cycle
operation: 10°K ...250°K |
| Criterion of the optimization |
Price or weight at prescribed Ucc
and losses |
| Induction |
Optimized in
accordance with the temperature rise, no-load operation, the inrush current,
efficiency, weight and price |
| Ambient temperature |
-100°C ... 120°C |
| Cooling |
air or oil |
| Core families data pool |
EI, EE,..., UI, LL,..., 3PhEI,
C-cores,...
The cores, which do not exist in the core data base can
be created by user. |
| Design mode |
In this mode the program
designs in accordance with the input data. |
| Test and simulating mode |
In this mode the user can
change manually the turns, wire sizes, loads, input
voltage, frequency, duty cycle, steel,... and recalculate
the transformer. |
|