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240 Resistor braking
Selecting and routing the cables of a custom resistor
Use the same cable type for the resistor cabling as for the drive input cabling to ensure
that the input fuses also protect the resistor cable. Alternatively, a two conductor shielded
cable with the same cross-sectional area can be used.
Minimizing electromagnetic interference
Follow these rules in order to minimize electromagnetic interference caused by the rapid
current changes in the resistor cables:
•
Shield the braking power line completely, either by using shielded cable or a metallic
enclosure. Unshielded single-core cable can only be used if it is routed inside a
cabinet that efficiently suppresses the radiated emissions.
•
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 (1 ft).
•
Cross any 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.
Maximum cable length
The maximum length of the resistor cable(s) is 50 m (164 ft).
EMC compliance of the complete installation
Note
: ABB has not verified that the EMC requirements are fulfilled with custom brake
resistors and cabling. The EMC compliance of the complete installation must be
considered by the customer.
Placing custom brake resistors
Install the resistors outside the drive in a place where they are able to cool effectively.
Arrange the cooling of the resistor in a way that
•
no danger of overheating is caused to the resistor or nearby materials, and
•
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. The temperature of the air flowing from
the resistor is hundreds of degrees Celsius. If the exhaust vents are connected to
a ventilation system, ensure that the materials withstand 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. By default, a
brake chopper fault is wired to stop the supply unit of the drive.
Summary of Contents for ACS880-17
Page 1: ...ABB industrial drives Hardware manual ACS880 37 drives ...
Page 3: ......
Page 4: ......
Page 6: ......
Page 16: ...16 ...
Page 30: ...30 Introduction to the manual ...
Page 70: ...70 Mechanical installation ...
Page 105: ...Electrical installation 105 4 5 3 6 7 ...
Page 107: ...Electrical installation 107 5 6 4 3 ...
Page 108: ...108 Electrical installation 7 8 8 ...
Page 109: ...Electrical installation 109 9 10 ...
Page 111: ...Electrical installation 111 2 360 grounding detail a b b 1 5 a 11 b a PE 10 7 5 6 8 ...
Page 117: ...Electrical installation 117 PE 11 8 4 9 11 ...
Page 134: ...134 Control units of the drive ...
Page 140: ...140 Start up ...
Page 142: ...142 Fault tracing ...
Page 154: ...154 Maintenance 4 5 6 7 8 6 10 10 ...
Page 162: ...162 Maintenance 5 6 3 4 7 ...
Page 163: ...Maintenance 163 6 8 7 11 10 9 ...
Page 167: ...Maintenance 167 3 4b 4a 4b 8 ...
Page 185: ...Technical data 185 Declaration of Conformity ...
Page 186: ...186 Technical data ...
Page 196: ...196 Dimensions Dimension drawing examples Frame 1 R8i 1 R8i ...
Page 197: ...Dimensions 197 Frame 1 R8i 1 R8i top cable entry exit H351 H353 ...
Page 198: ...198 Dimensions Frame 1 R8i 1 R8i with brake choppers and resistors D150 D151 ...
Page 199: ...Dimensions 199 Frame 1 R8i 1 R8i with sine output filter E206 ...
Page 200: ...200 Dimensions Frame 2 R8i 2 R8i eg ACS880 37 1110A 3 IP22 ...
Page 201: ...Dimensions 201 Frame 2 R8i 2 R8i eg ACS880 37 1210A 3 IP54 ...
Page 204: ...204 Dimensions Frame 2 R8i 2 R8i with main breaker F255 and top entry top exit H351 H353 1 2 ...
Page 205: ...Dimensions 205 Frame 2 R8i 2 R8i with main breaker F255 and top entry top exit H351 H353 2 2 ...
Page 206: ...206 Dimensions Frame 3 R8i 3 R8i 1 2 ...
Page 207: ...Dimensions 207 Frame 3 R8i 3 R8i 2 2 ...
Page 208: ...208 Dimensions Frame 3 R8i 3 R8i with common motor terminal cubicle H359 1 2 ...
Page 209: ...Dimensions 209 Frame 3 R8i 3 R8i with common motor terminal cubicle H359 2 2 ...
Page 217: ...Dimensions 217 Sine filter E206 cubicle 1000 mm top cable exit ...
Page 221: ...Dimensions 221 Cubicle width 400 mm top cable exit Cubicle width 600 mm bottom cable exit ...
Page 222: ...222 Dimensions Cubicle width 600 mm top cable exit ...
Page 234: ...234 The Safe torque off function ...
Page 244: ...www abb com drives www abb com drivespartners 3AXD50000020437 Rev A EN 2015 02 06 Contact us ...