Cast resin dry type transformers, special transformers up to 25MVA

At TMC we use our vast experience and expertise to work with our customers to develop specialist solutions, designed specifically to suit their requirements. We produce cast resin special transformers up to a power rating of 25MVA at a system voltage of 52kV for a wide variety of applications, across a multitude of sectors.

TMC draws on its considerable know-how to assess the ability of products to withstand short-circuit forces (FEA analysis) and manage:

very high currents (>30kVA)
cooling - not only with natural or forced air, but also with direct or indirect water
installations in particularly polluted outdoor environments by studying and developing suitable solutions
the combination of epoxy resin and foil winding ensures the ultimate in dielectric performance and short-circuit resistance
aluminium or copper winding
class F or class H insulation systems
air cooling channels included in the coil for better thermal efficiency at power ratings >5MVA

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Our products

Cast resin transformer with H-ART technology

Power Rating: 2500kVA
Insulation Temperature Class: H-ART180
Compact design
K13 harmonic profile
Electrostatic screen

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This solution is for a traction application according to EN50329 Cl. VI with a nominal power rating of 4MVA and a primary voltage of 33Kv.

It is a solution based on customer special requirements and installed in a railway substation.

The solution is an for a 12 pulse rectifier with uncoupled windings and it is compliant to overload cycle according to the traction standard with only natural air cooling.

Installation is IP00.

On the primary windings surge arrestors phase to ground are installed to protect from overvoltage surge of the power network.

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Power: 10kVA

Primary Voltage: 400V

Secondary Voltage: 24V

Insulation method: Cast/Cast

Classes environmental, climatic, fire – E2C2F1

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Transformer for naval propulsion

The electrical propulsion systems have many advantages compared to the conventional engine driven propulsion system. This technology is naturally increasing the demand for electrical propulsion for different vessels, such as cruise ships, container ships and navy ships. With advancement in technology and research, the electrical propulsion system is not limited to small boats and small vessels anymore.

Power: 7,5 MVA
Primary Voltage: 11kV, 60Hz
Secondary Voltage: 2 x 1,8kV
Protection: IP44
Cooling: AFWF

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Industrial converter transformers can be supplied from several kVA to many MVA. Gas Processing systems require large electrical pumps and compressors which are controlled by Transformer/ VSD systems.

Transformer for gas pumping station

Power: 9MVA
Primary Voltage: 33kV 50Hz
Secondary Voltage: 6 x 2kV
Protection: IP44
Cooling: AFAF
Weight 23.500kg

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Small hydro projects usually have faster environmental and licensing procedures. The equipment is usually in serial simplified production and the related civil works construction is reduced. The physically smaller size of equipment makes it easier to transport and install.

Example:

Power: 1500/2000kVA
Primary Voltage: 11kV
Secondary Voltage: 0,69kV
Frequency: 50Hz
Cooling: ANAF
Weight: 5.000kg

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Although outdoor installations normally utilize oil insulated transformers, environmental protection or easy of maintainability demand the use of specialist dry type transformers.

Power: 2000kVA
Primary Voltage: 11kV
Secondary Voltage: 0,433kV
Frequency: 50Hz
Outdoor Protection: IP56
Cooling: AN
Weight: 6.500kg

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The electrical propulsion systems have many advantages compared to the conventional engine driven propulsion system. This technology is naturally increasing the demand for electrical propulsion for different vessels, like cruise ships, container ships and navy ships. With advancement in technology and research, the electrical propulsion system is not limited to small boats and small vessels anymore.

Power: 7,5MVA
Primary Voltage: 11kV
Secondary Voltage: 2 x 1,8kV
Frequency: 60Hz
Protection: IP44
Cooling: AFWF
Weight: 9.500
2 x 2 units for about 24 pulse

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On board of vessels there are a lot of electric engines. Usually a VSD and a customized converter transformer feed these motors. Drilling, thrusters, compressors and pumps are typically configured as described.

Power: 3,5MVA
Primary Voltage: 6,6kV
Secondary Voltage: 2x0,715kV
Frequency: 60Hz
Protection: IP44
Cooling: AFWF
Weight: 6.700kg

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MV transformers are almost always present on board of vessels or cruise ships.

Power: 4MVA
Primary Voltage: 0,6kV
Secondary Voltage: 0,690kV
Frequency: 50/60Hz
Protection: IP44
Cooling: AN
Weight: 8000kg

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In the infrastructure industry there are several applications with electric motors. An example is the transformer through with powers electric is pumped into residential complex.

Power: 3650kVA
Primary Voltage: 20kV 50Hz
Secondary Voltage: 2 x 640V
Protection: IP44
Cooling: AN

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