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Programs
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Properties of the Large
Transformers Program
for Design of Distribution & Power
Transformers
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| 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. |
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