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Resistor braking 231
EMC compliance of the complete installation
Note
: ABB has not verified that the EMC requirements are fulfilled with external custom
brake resistors and cabling. The customer must consider the EMC compliance of the
complete installation.
Placing the brake resistors
Install the brake resistors outside the drive module in a place where they will cool.
Arrange the cooling of the resistor in a way that:
•
no danger of overheating is caused to the resistor or nearby materials
•
the temperature of the room the resistor is located in does not exceed the allowed
maximum.
Supply the resistor with cooling air or coolant according to the resistor manufacturer’s
instructions.
WARNING!
The materials near the brake resistor must be non-flammable. The
surface temperature of the resistor is high. Air flowing from the resistor is of
hundreds of degrees Celsius. If the exhaust vents are connected to a ventilation
system, make sure that the material withstands high temperatures. Protect the resistor
against contact.
Protecting the system against thermal overload
The brake chopper protects itself and the resistor cables against thermal overload when
the cables are dimensioned according to the nominal current of the drive. The drive control
program includes a resistor and resistor cable thermal protection function which can be
tuned by the user. See the firmware manual.
ABB requires:
•
main contactor for protecting against resistor overheating
•
thermal switch (standard in ABB resistors) for safety reasons. The thermal switch
cable must be shielded and may not be longer than the resistor cable. Wire the switch
to a digital input on the drive control unit as shown in the figure below.
Protecting the resistor cable against short-circuits
The DC fuses for the brake chopper protection protect the resistor cable against short-
circuits.
Mechanical installation of brake resistors
All brake resistors must be installed outside the drive. Obey the resistor manufacturer’s
instructions.
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Summary of Contents for ACS880-34
Page 1: ... ABB INDUSTRIAL DRIVES ACS880 34 drive modules 132 to 400 kW 200 to 450 hp Hardware manual ...
Page 4: ......
Page 14: ...14 ...
Page 22: ...22 Safety instructions ...
Page 28: ...28 Introduction to the manual ...
Page 42: ...42 Operation principle and hardware description ...
Page 118: ...118 External control unit ...
Page 140: ...140 Installation example with full cabling panels option H381 M8 16 Hex 2 5 4 3 1 1 1 1 2 6 7 ...
Page 152: ...152 Installation checklist ...
Page 156: ...156 Start up ...
Page 158: ...158 Fault tracing ...
Page 174: ...174 Maintenance ...
Page 202: ...202 Technical data EU Declaration of Conformity Machinery Directive ...
Page 204: ...204 Technical data ...
Page 206: ...206 Dimension drawings Standard configuration 3AXD50000038012 ...
Page 208: ...208 Dimension drawings Drive module with options 0B051 H356 0H371 3AXD50000038012 ...
Page 209: ...Dimension drawings 209 Configuration with option H381 3AXD50000323210 ...
Page 210: ...210 Dimension drawings LCL filter module 3AXD50000206162 ...
Page 214: ...214 Dimension drawings External control unit 3axd50000011687 ...
Page 238: ...238 Resistor braking ...
Page 242: ...242 du dt and sine filters ...
Page 256: ...Contact us www abb com drives www abb com drivespartners 3AXD50000035191 Rev B EN 2018 09 28 ...