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

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26 Introduction to the manual
Terms and abbreviations
Term/abbreviation Explanation
Auxiliary voltage switch Main switch for the auxiliary voltage
Auxiliary control cubicle
(ACU) The cubicle with auxiliary devices such as auxiliary voltage circuit breakers,
control electronics, measurement boards, etc.
BAMU Main voltage measurement board
BCON Type of control board
BCU Type of control unit, a BCON board in a metal housing. See BCON.
DC chopper Protects the converter by cutting down a peak overvoltage in the converter DC
link: conducts the surplus energy from the intermediate circuit of the wind
turbine converter to the DC resistor when necessary. The chopper operates
when the DC link voltage exceeds a maximum limit. A sudden disturbance in
turbine operation or grid can cause the DC voltage rise.
DC resistor Dissipates the surplus energy conducted by the DC chopper to heat. Essential
part of the chopper circuit. See
DC chopper .
CCU Control cubicle
Control board Circuit board in which the control program runs. See BCON .
Control unit Control board built in a rail-mountable housing. See BCU .
Converter Converts direct current and voltage to alternating current and voltage, or vice
versa.
Converter module Grid-side converter or generator-side converter module
Cubicle One section of a cabinet-installed wind turbine converter. A cubicle is typically
behind a door of its own.
DC link DC circuit between grid-side converter and generator-side converter
DC link capacitors Energy storage which stabilizes the intermediate circuit DC voltage.
DDCS Distributed drives communication system; a protocol used in optical fiber
communication
DTC Direct torque control; a generator control method by ABB.
EMC Electromagnetic compatibility
FCAN Optional CANopen® adapter module
FCNA Optional ControlNet™ adapter module
FDNA Optional DeviceNet™ adapter module
FEA Optional extension adapter module
FECA Optional EtherCAT® adapter module
FEN-31 Optional HTL incremental encoder interface module
FENA Optional Ethernet adapter module for EtherNet/IP™, Modbus TCP® and
PROFINET IO® protocols
FIO-01 Optional digital I/O extension module
FIO-11 Optional analog I/O extension module
FPBA Optional PROFIBUS DP® adapter module