ACS880 IGBT supply unit (ISU)

IGBT supply unit shortly

ACS880-104 R7iLC-R8iLC - right
IGBT supply unit (ISU) is used in ultra-low harmonic and regenerative drives to convert three-phase AC voltage to DC voltage. The ISU consists of R7i/R8i and LCL filter modules. It can operate in both motoring and generating modes. The DC voltage is constant and the line current is sinusoidal. The control also provides a near unity power factor. The supply unit can also boost DC voltages e.g. when line voltage is low. Harmonic content remains extremely low due to DTC control and LCL line filtering. ISU is very tolerable to network voltage variations.

Voltage and power ranges of supply units

R7iLC modules

400 V

  • 106 - 1039 kVA
  • 186 - 1819 ADC

500 V

  • 133 - 1299 kVA
  • 186 - 1819 ADC

690 V

  • 311 - 1603 kVA
  • 315 - 1626 ADC

R8iLC modules

690 V

  • 430 - 3502/6944 kVA
  • 436 - 3553 ADC

The design is extremely compact which enables optimized drive cabinet installations. One drive module can deliver DC current up to 934 A. The modules are light, only 37-41 kg (R7i) or 59-63 kg (R8i), meaning that the cabinet mechanical design and construction is less demanding.

 

ACS880-204LC, liquid-cooled supply unit (ISU), IP00
 Frame size
Height
(mm)
Width
(mm)		Depth
(mm)
R7i403233381
R7i installation frame424250541
R8i880210487

 

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