ABB ACS880-87LC-4000A/4021A-7, Hardware Manual

Page: 112 / 144

112 Technical data
Generator connection data
BCU control unit
See chapter Control units of the converter .
Efficiency
96.5% at nominal load with power factor 1.0 at 690 V.
Degree of protection
The converter is labeled as IP54, IP2x with cubicle doors open.
Some customer variants may be different, eg, the LCL filter cubicle, converter module
cubicles and auxiliary control cubicle: IP54. Main breaker cubicle: IP21. In this case, the
converter is labeled as IP21.
Environmental and corrosion classification
The expected lifetime for the converter cabinet enclosure is considered to be at least 20
years under the following environmental classifications and corrosion class.
Notes :
1)
Condensation and/or formation of ice inside the converter cabinet is not allowed in any operational
circumstances.
2)
ABB additional extension to ambient surrounding temperature, outside the cabinet, -30 °C … 55 °C
(-22 °F … 131 °F). See also section Temperature derating on page 108 .
3)
L denotes service life >15 years.
Disclaimer
The customer shall ensure that the environmental conditions inside the wind turbine is maintained in order to
fulfill the environmental classifications and/or corrosion class, as herein stated. If the operational condition is
out of any environmental classifications and/or corrosion class, the expected lifetime of the converter may be
Generator types AC induction generators, permanent magnet generators
Voltage ( U
2
) 0 … 110% U
1
, 3-phase symmetrical, U
max
750 V
Output frequency ( f
2
) 8…200 Hz
Switching frequency 2 kHz (average)
Frequency resolution 0.01 Hz
Current See section Ratings on page 107.
Field weakening point 8 … 300 Hz
Environmental classifications in accordance with IEC60721-3-3
• Climatic conditions
3K5
1)
• Special climatic conditions
3Z11
2)
• Chemically active substances 3C2
• Mechanically active substances 3S2
• Mechanical conditions 3M1
Corrosion class in accordance with 12944-1
• Corrosion class for the cabinet enclosure (painted surfaces,
pre-treatment FeP, polyester powder paint thickness 80 µm)
C3L
3)