Trafomec Power Transmission and Conversion

Trafomec has extensive experience in the design and manufacture of reliable high quality transformers for High Voltage Direct Current (HVDC) and Variable frequency Drive (VFD) applications.

Thanks to its worldwide integrated design and International manufacturing organization Trafomec has supplied thousands of cost-effective tailored systems, services and solutions worldwide, preserving and increasing customer business value in a wide range of advanced power transmission and conversion applications.

Power Transmission and Conversion main applications

The PTC (Power Transmission & Conversion) division designs and manufactures reliable high quality transformers for High Voltage Direct Current (HVDC) and Variable frequency Drive (VFD) applications.

  • Cast resin and water cooled medium voltage (V>1000V) reactors for energy transmission in high voltage in DC
  • R.- W.: cast resin and water cooled medium voltage (V>1000V) reactors for converters in medium voltage
  • Perfect Harmony: impregnated, air cooled medium voltage (V>1000V) transformers for Perfect Harmony converters
  • MV Reactors & Trafos: impregnated, air cooled transformers (non Perfect Harmony) and medium voltage reactors for filter and short circuit electric current limitation
  • LV converters: impregnated, air cooled low voltage (V<1000V) transformers and reactors for low voltage converters
DC smoothing reactor high current rectifier

DC smoothing reactor high current rectifiers

The component is a DC reactor for smoothing the high current coming from the rectifier with a technological solution of direct water cooling.

Nominal inductance 15 μH
nominal current 25000 A
Rated DC voltage 45 V
Weight 1475 kg
Cooling system Water
DC smoothing reactor for arc heater supply used in space simulation

DC smoothing reactor for arc heater supply

These huge components have been used in space simulation to create an electrical arc in order to provide a plasma fluid at 3000°C to test some special materials.

Nominal inductance 14 μH
nominal current 3000 A
Ripple frequency 600 : 1200 Hz
Ripple Current 25 : 25 A
Nominal voltage 30 kV
Weight 13500 kg
Cooling system Water
DC smoothing reactor used in a foundry to smelt

DC smoothing reactor for arc heater supply

This component is working in a Chinese foundry where the material is melted using an electric arc.

Nominal inductance 0.6 μH
nominal current 20 kA
Ripple frequency 150 Hz
Ripple Current 2 kA
Nominal voltage 780 V DC
Weight 2150 kg
Cooling system Water
DC link reactor  for  AC motor drive

DC link reactor for AC motor drive

This component has been used for a motor drive of 100 MVA; with this power we can give the right current to a small city.

Nominal inductance 9 μH
nominal current 3600 A
Ripple frequency 36 : 360 Hz
Ripple Current 40 : 100 A
Nominal voltage 15 kVC
Weight 2200 kg
Cooling system Water
Air or iron cored reactor with electrical and magnetic shielding

Air or iron cored reactors
with electrical and/or magnetic shielding

The proper use of electrical or magnetic screens can limit the interference between the reactor’s stray flux and the surrounding metallic parts or components belonging to nearby circuits.

Nominal inductance 2 μH
fundamental current 2805 A
short-circuit current 28.3 kA
Nominal voltage 4160 V
Weight 2500 kg
Cooling system Water
low-cost industrial filter

Industrial filters

For big industrial plants the use of water cooled components is an important solution to provide low-cost and reduced size reactors.

Nominal inductance 2 x 4.3 μH
fundamental current 1600 A
Insulation voltage 7.8 kV
Nominal voltage 3.5 kV
Weight 1600 kg
Cooling system Water
Industrial drive application

Drives application

Very compact components for use with water cooling systems in industrial or marine applications. Special fittings and connectors are used to prevent any leakage.

Nominal inductance 8 μH
fundamental current 1500 A
Insulation voltage 16.75 kV
Nominal voltage 6.6 kV
Weight 2600 kg
Cooling system Water
Saturable reactor for HVDC modules

Saturable reactors for HVDC modules

This special component is used to limit overvoltage and overcurrent during switching transient on HVDC plants for long distance transmission of energy such as for submarine cables.

Nominal inductance 0.6 μH
Time voltage integral 165 mV/sec
Insulation class F
BIL 77 kV
Weight 118 kg
Cooling system Water
Smoothing reactor for naval AC drive

Smoothing reactors for naval AC drive

The casting process for this frame reactor is chosen to provide a suitable insulation between the winding and the earthed frame and to guarantee an optimal protection of the conductors from extreme weather conditions.

Nominal inductance 6 μH
Nominal current 2870 A
Ripple frequency 105 : 720 Hz
Ripple current 21 : 126 A
Weight 5000 kg
Cooling system Water
MV filter for special applications

MV filters for special applications

The filters for MV application are provided by Trafomec with dry type components.

Nominal inductance 13.65 μH
Fundamental current 62.6 A
BIL 75 kV
Insulation voltage 28 kV
Nominal voltage 11 kV
Weight 450 kg
Cooling system Air
MV filter for industrial applications

MV filters for industrial applications

Three single-phase chokes can be also mounted in a stack with special fixing beams with this component.

Nominal inductance 1.238 μH
Fundamental current 287 A
BIL 75 kV
Insulation voltage 28 kV
Nominal voltage 11 kV
Weight 1150 kg
Cooling system Air
MV coils for filtering

MV coils for filtering

In the case of HV, Trafomec can provide components which are suitable for indoor or outdoor installation.

Nominal inductance 1.68 μH
Fundamental current 369 A
BIL 60 kV
Insulation voltage 20 kV
Nominal voltage 7.2 kV
Weight 310 kg
Cooling system Air
Transformer used in ozone plants

Ozone plant transformers

This red component is suitable for ozone applications. These transformers are used to create ozone used in water purification systems.

Primary voltage 800 V
Secondary voltage 3410 V
primary current 935 A
Secondary current 180 A
Weight 800 kg
Cooling system Air
Transformer with two secondary windings for high current 12 pulse rectifiers

Transformers with two secondary windings

for high current 12 pulse rectifiers

Trafomec developed and manufactured several components with hollow conductors for direct water cooling to handle the issues related to high current values.

Primary voltage 530 V
Secondary voltage 62 V
primary current 770 A
Secondary current 4630 A
Weight 1900 kg
Cooling system Water
Phase shifting transformer for multi-level converters

Phase shifting transformers

for multi-level converters

Dry type VPI transformers with multiple secondaries for installation in MV multi-level converters.

Rated Power up to 8 MVA
Primary voltage up to 13.8 kV
Secondary voltage up to 750 V
Number of secondaries up to 18
Conductor material Al or Cu
Mounting Vert. or Horiz.
Cooling system Forced air
Multi-level transformers

Multi-level transformers

Multi-level industrial transfromers.

Rated Power 400 kVA to 8 MVA
Primary winding 3.3 kV to 13.8 kV
Secondary winding 630 V to 750 V
Number of cells 9 to 18
technology VPI
Conductor material Al or Cu
Mounting Vert. or Horiz.
Cooling system Forced air
Download PTC brochure