Resistor cables
Cable type
Use the same cable type for the resistor cabling as for the drive input cabling or, alternatively,
a two conductor shielded cable with the same cross-sectional area.
Maximum cable length
The maximum length of the resistor cable(s) is 10 m (33 ft).
Minimizing electromagnetic interference
Obey 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 is 0.3 meters (1 ft).
•
Cross the other cables at 90 degree 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 greater 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 custom brake
resistors and cabling. The customer must consider the EMC compliance of the complete
installation.
Protecting the resistor cable against short-circuits
The input fuses of the drive will also protect the resistor cable when it is identical with the
input cable.
Resistor thermal switch
Use a resistor with a thermal switch (standard in ABB resistors).
Make sure that the cable in the resistor thermal switch circuit meets the following
requirements:
•
shielded cable
•
rated operating voltage between a core and ground > 750 (
U
0
)
•
insulation test voltage > 2.5 kV
•
jacket material for at least 90 °C (194 °F). Take into account further requirements due
to resistor construction and temperature.
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 overload protection function which can be tuned by the user.
See the firmware manual.
EMC compliance of the complete installation
ABB cannot test that the EMC requirements are fulfilled with custom brake resistors and
cabling. The customer must consider the EMC compliance of the complete installation.
188 Resistor braking
Summary of Contents for ACH580-04
Page 1: ... ABB DRIVES FOR HVAC ACH580 04 drive modules Hardware manual ...
Page 2: ......
Page 4: ......
Page 54: ...54 ...
Page 88: ...88 ...
Page 100: ...100 ...
Page 118: ...118 ...
Page 122: ...122 ...
Page 124: ...124 ...
Page 128: ...3 6 5 5 128 Maintenance ...
Page 134: ...134 ...
Page 156: ...R10 standard configuration 156 Dimension drawings ...
Page 157: ...R10 with E208 0H354 H356 H370 0H371 Dimension drawings 157 ...
Page 158: ...R10 with option B051 158 Dimension drawings ...
Page 159: ...R10 with option E208 H356 P906 192 Tools R10 3 1 Dimension drawings 159 ...
Page 160: ...R10 with option E208 0H371 H356 0H354 H370 P906 Tools 191 R10 2 1 160 Dimension drawings ...
Page 161: ...R10 with option B051 P906 190 Tools R10 1 1 Dimension drawings 161 ...
Page 162: ...R11 standard configuration 162 Dimension drawings ...
Page 163: ...R11 with option E208 0H371 H356 0H354 H370 Dimension drawings 163 ...
Page 164: ...R11 with option B051 164 Dimension drawings ...
Page 165: ...R11 with option E208 H356 P906 Dimension drawings 165 ...
Page 166: ...R11 with option E208 0H371 H356 0H354 H370 P906 166 Dimension drawings ...
Page 167: ...R11 with option B051 P906 Dimension drawings 167 ...
Page 186: ... Declaration of conformity 186 The Safe torque off function ...
Page 206: ...Dimension drawing 206 External control unit option P906 ...
Page 212: ...212 ...
Page 224: ...224 ...
Page 226: ...226 ...
Page 234: ...234 ...