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1. Standard
The transformers are manufactured in accordance with CNS598,ANSI
C57.12.00,
IEC60076,BS-171,NEMA-TR1, VDE-0532,or TPC(Taiwan Power Company)
standards, and individual customer requirements.
2. Core
The cores use high quality cold rolled grain-oriented, and
laser-processed silicon steel sheet. They provide low iron
loss, low noise, compact size, and the best performance for
high efficiency transformers.
Types of Cores:
A. Strip-Wound Core:
For application in single-phase or three-phase compact size
transformers with low noise and excellent magnetic circuit
characteristics.
B. Step-Lab Core:
It is suitable for application in single-phase or three-phase,
core-type or shell-type compact size transformers. It has
excellent magnetic circuits which reduce iron loss
Considerably and greatly increase the mechanical strength
of the transformer.
C. Stacking Core:
The mitered core, joined by 45-degree cut silicon steel sheets,
has excellent mechanical strength, and is for application
in three-phase, high capacity transformers. It can have best
performance on low iron loss by using high quality surface-laser-processed
silicon steel sheets.
3. Windings
A. Materials:
We use high quality conductor copper/aluminum in our products.
The categories are as follows:
a. Enamelled Magnet Wire: Round or rectangular copper/aluminum
in wires.
b. Paper-Wrapped Rectangular Copper Wire: The wires, ribbed
with thermally
upgraded insulating paper, are applied in oil-immersed transformers.
c. Copper/Aluminum foil: The high conductor copper or aluminum
foil is applied
in low voltage windings. The foils must be processed through
an edge-modifier
to get rid of burrs and to have the round edges.
B. Winding Structure:
Basic designs are as follows: HV-LV, LV-HV, LV-HV-LV, or HV-LV-HV-LV.
By using a copper/aluminum foil, rectangular copper wires,
the windings have a
Compact size excellent heat transmission, low lose, high lightening-impulse
resistivity, and outstanding anti-short-circuit strength.
4. Insulation
Our oil-immersed transformers use press board, thermally upgraded
insulating kraft
paper, and insulating oil(mineral, silicon, or high fire-point
oil, etc.)
5. Bushings
A. HV Bushing:
High quality porcelain bushings are used on the high voltage's
terminals. Optional
bushing wells, inserts, and elbows are upon request, allowing
high voltage cables
to be inserted directly, and show no live parts outside.
B. LV Bushing:
High quality porcelain LV bushings can be equipped with clamp
type or spade type,
and also can be with stud mole type LV terminals which have
rubber insulating
sleeves to show no live parts outside. The above mentioned
LV terminals are able to
be connected with switch gears by cables or bus-bars.
6. Tank
All tanks are assembled by cold rolled and hot rolled steel
plates through welding. They are equipped with radiators or
corrugated steel sheets in accordance with the capacity of
the transformer. Meanwhile, reinforced structure and pressure
relief valves enhance the strength of tanks to face a harsh
operation environment.
The tank must go through degreasing, acid cleaning, phosphide
film, oxide primer,
and polyurethane process etc. to guarantee its functioning
in the worst operation
environment.
7. Clamp
Step-Lab Cores and Stacking Cores have different clamp arrangements.
We designed a special pre-load structure, which not only can
resist axial electromagnetic force, but also perform well
on resisting radial electromagnetic force. With reinforced
clamps,
the coils increase their anti-axial and radial strength, making
the coils compact and strong. So, our transformers have excellent
electromagnetic characteristics and the best anti-short-circuit
strength. This guarantees the safety of the system when an
abnormal breakdown occurs.
8. Accessories
In accordance with the capacity of the transformer and the
standard, the accessories include an oil filling hole, oil
drain valve, safety valve, standard thermometer, oil level
gauge, skid wheel, jacking pad, breather, earthing terminal,
no-voltage type
tap changer, and etc.
9. Optional Accessories
Oil conservator, Buchholz relay, cooling fan, HV & LV
cable box, cable duct, bus-bar duct, bushing well, bushing
insert, elbow, dial-type thermometer or oil level gauge,
on-load type tap changer, protective fuse, dry well fuse connector,
flexible copper braid, and lightning arresters are available
upon customer request at extra cost.
10. Installation
Our transformers can be installed indoor or outdoor. Special
designs or special
installation can be arranged upon customer request.
11. Tests
All products must pass standard Q.C. and testing procedures
before shipment.
The following optional tests are available upon request:
a. Temperature increase test
b. Full wave/chopped wave impulse test
c. Withstand short circuit test
Other special tests should be indicated before ordering.
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