Multilevel cells

Multilevel Medium Voltage cells


The SECOM Drive multilevel inverters are medium voltage multilevel drives based on CBH inverters (H bridge cascade IGBT cells), in a 3L NPC topology.
These drives can be air and water cooled and have an AC/DC input converter with output voltage levels that range from 3.3 kV to 11 kV and output power from 200 kVA (to 3.3 kV) up to 13000 kVA (at 11 kV).
The configuration and the number of cells depend on the output voltage level (3.3kV - 4.16kV - 6.6kV - 11kV).
The structure of the CHB converter uses standard power modules in a simple structure. Cells can be easily extracted from the cabinet where they are installed using a sliding support system.
Main features of SECOM Drive multilevel cells are the following:

  • Easy maintenance and quick power module replacement
  • Modular design
  • Standard and modular dimensions for either air ow water cooled system.

Main applications of multilevel inverters are machines and plants in metal in the process industry, such as:

  • Pumps
  • Fans
  • Compressors
  • Transporters
  • Extruders and separators
  • Ovens
  • Grinders
  • Shredders.

Technical data
Ambient condition
Storage temperature 0° C and <45°C
Min./Max. operating temperature +5°C and <+40°C
Control cabinet room temperature +5°C and <+35°C
Humidity Max. 90%
Site altitude < 1000 m. a.s.l.
Technical data SECOM multilevel module
Line side converter Diode DFE rectifier
Motor side converter N (6/9/15) cells
Unit power rating 200 kVA ÷ 13 MVA
Rated output current (ln) 35 ÷ 612 A
Rated output voltage 3.3 ÷ 11 kV
Efficiency 98%
Motor type Induction
Main supply voltage (50/60Hz) 3.3 ÷ 11 kV
Inverter output frequency Up to 100 Hz
Input power factor ≥ 0.97
Cooling Air (water as option)
Auxiliary voltages range 230 V (50 Hz)
Protection degree IP00
Single 1ph module weight 65 ÷ 130 kg
Applicable standards IEC60146 -- IEC61800-3/4/5 -- IEC 60204-11 -- IEC62103 -- EN62271

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