MV-Medium Voltage Transformers

TDT – Tri Dimensional Transformers

A new energy efficient transformer design with a stabilised structure offering greater performance with less material and production costs.

In comparison to conventional transformers, the TDT wound core drastically decreases the no-load current and noise level. This innovation provides significant savings in operating costs.

The Tri Dimensional Transformer (TDT) is a new energy efficient transformer design with a stabilised structure offering greater performance with less material and production costs. In comparison to conventional transformers, the TDT wound core drastically decreases the no-load current and noise level. This innovation provides significant savings in operating costs.

TDT Oil Immersed
Transformers

TDT Open Ventilated
Dry Type Transformer

TDT Cast Resin
Dry Type Transformer

The energy efficient advanced technology offers:

  • Continuously wound core without air gaps, reducing magnetic reluctance
  • Provides a symmetrical 3 Phase magnetic circuit
  • Optimised utilisation of core material in terms of magnetic flux distribution
  • Almost round leg shape with 96% fill-factor of the core leg circle
  • Smaller footprint with approx. 25% reduction in core area
  • Reduced weight for transport, handling and installation
  • Reduced no-load loss provides a more competitive and environment friendly solution
  • Greater efficiency to reduce operational costs during the transformers life cycle
  • Reduced harmonics and inrush current
  • Reduced sound level and improved EMC.


TDT offers great benefits:

  • Symmetrical and stable structure to guarantee long-term safe operation
  • Compact size
  • Efficient, 20-30% lower no-load loss with the same material usage
  • Reduced and constant sound level, 5-10dB improvement in contrast to a standard stacked core transformer
  • Reduced operational cost during the transformer life cycle
  • Easy to handle with simple installation
  • Up to 30% lighter than traditional transformers.


TDT – Tri Dimensional Transformer - Cast Resin

The Altro TDT Cast Resin Dry Type Transformer is using the 3-D Wound Core technology with the epoxy resin as the insulation. Transformers windings are enveloped with epoxy resin that has great mechanical strength, higher short-circuit withstand capacity and the compressed strength of epoxy resin is much robust. As the whole winding is encapsulated in the solid insulation of epoxy resin, the winding is moisture proof and prevents all possible damage from harmful gas and corrosive chemical composition.


Advantages of Performance

3-Dimensional Wound Core Cast Resin Transformers have the safety features, green properties, higher overload capacity, lower in no-load losses and magnetising current, lower noise level, better impulse over voltage withstand capability, lightweight and other advantages. Despite the high technology, this Cast Resin Transformer is also economically affordable.


Scope of Application

This transformer are suitable to use at location of high fire requirement, such as: High-rise buildings, airports, railway stations, subways, hospitals, power plants, mining industries, shopping complexes and other densely populated areas. Our transformers are also used in oil and gas industries, nuclear power plants and nuclear power submarines.

Cast Resin Dry Type Transformer Capacities

Rating: 50kVA ~ 3000kVA

Voltages: Up to 36kV

Enclosures: Pad Mount / Ground Mount, Kiosk Type, Packaged Substation

TDT – Tri Dimensional Transformer - Dry Ventilated

Advantages of Performance

The Altro TDT open ventilated transformer is not only green and energy saving but also fire-proof explosion-proof, dust proof, damp proof, better overload capacity and easy maintenance. The winding of the transformer has a high fire resistance and thermal shock resistance as they will not release harmful gas under 750℃. Furthermore, the windings can be repaired and replaced if any phases are broken.


Scope of Application

This transformer is suitable for the same application as the cast resin transformer. In addition to that, Open Ventilated Transformer can withstand a higher temperature of 220˚C (Class C) that is suitable for application in dessert areas or critical climate, smelting plant, iron & steel mill, casting plant and foundries.

Open Ventilated Dry Type Transformer Capacities

Rating: 50kVA ~ 3000kVA

Voltages: Up to 36kV

Enclosures: Pad Mount / Ground Mount, Kiosk Type, Packaged Substation

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