Selecting And Routing The Brake Resistor Cables; Placing The Brake Resistor - ABB ACS580 Series Hardware Manual

Selecting and routing the brake resistor cables

Use a shielded cable with the conductor size specified in section Terminal and
entry data for the power cables on page
cables (page 330).
Minimizing electromagnetic interference
Follow these rules in order to minimize electromagnetic interference caused by
the rapid current changes in the resistor cables:
• Install the cables away from other cable routes.
• Avoid long parallel runs with other cables. The minimum parallel cabling
separation distance should be 0.3 meters.
• Cross the other cables at right angles.
• Keep the cable as short as possible in order to minimize the radiated emissions
and stress on chopper IGBTs. The longer the cable the higher the radiated
emissions, inductive load and voltage peaks over the IGBT semiconductors of
the brake chopper.
Note: ABB has not verified that the EMC requirements are fulfilled with external
user-defined brake resistors and cabling. The EMC compliance of the complete
installation must be considered by the customer.
Maximum cable length
The maximum length of the resistor cable(s) is 10 m (33 ft).

Placing the brake resistor

Install the resistors outside the drive 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/water 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.
Terminal and entry data for the power
Resistor braking 403