Implementing thermal overload and short-circuit protection
■
Protecting the drive and input power cable in short-circuits
The drive is equipped with internal AC fuses (1) as standard. The fuses restrict drive damage
and prevent damage to adjoining equipment in case of a short-circuit inside the drive.
Protect the input cable with fuses or circuit breaker (2) according to local safety regulations,
appropriate input voltage and the rated current of the drive (see the technical data).
R8
~
~
M
3~
1
2
R11
M
3~
1
2
~
~
■
Protecting the motor and motor cable in short-circuits
The drive protects the motor cable and motor in a short-circuit situation when the motor
cable is sized according to the nominal current of the drive. No additional protection devices
are needed.
■
Protecting the drive and the power cables against thermal overload
The drive protects itself and the input and motor cables against thermal overload when the
cables are sized according to the nominal current of the drive. No additional thermal protection
devices are needed.
WARNING!
If the drive is connected to multiple motors, use a separate circuit breaker or fuses
for protecting each motor cable and motor against overload. The drive overload
protection is tuned for the total motor load. It may not trip due to an overload in
one motor circuit only.
Guidelines for planning the electrical installation 99
Summary of Contents for ACS880-37
Page 1: ... ABB INDUSTRIAL DRIVES ACS880 37 drives 45 400 kW 60 450 hp Hardware manual ...
Page 2: ......
Page 4: ......
Page 26: ...26 ...
Page 83: ...Mechanical installation 83 10 ...
Page 84: ...84 ...
Page 126: ... B055 a X504 126 Electrical installation ...
Page 144: ...144 ...
Page 150: ...150 ...
Page 152: ...152 ...
Page 160: ... 160 Maintenance ...
Page 196: ... 196 Maintenance ...
Page 232: ...R8 IP22 UL Type 1 and option B054 IP42 UL Type 1 Filtered 232 Dimension drawings ...
Page 233: ...R8 IP54 UL Type 12 option B055 option C129 Dimension drawings 233 ...
Page 235: ...R8 IP22 UL Type 1 and IP42 UL Type 1 Filtered option B054 option E206 Dimension drawings 235 ...
Page 236: ...R8 IP22 UL Type 1 option E202 236 Dimension drawings ...
Page 237: ...R11 IP22 UL Type 1 and IP42 UL Type 1 Filtered option B054 Dimension drawings 237 ...
Page 238: ...R11 IP54 UL Type 12 option B055 238 Dimension drawings ...
Page 240: ...R11 IP54 UL Type 12 option B055 option C128 240 Dimension drawings ...
Page 241: ...R11 IP54 UL Type 12 option B055 option C129 Dimension drawings 241 ...
Page 242: ...R11 IP54 UL Type 12 option B055 options C129 H350 H352 242 Dimension drawings ...
Page 243: ...R11 IP22 UL Type 1 and IP42 UL Type 1 Filtered option B054 option D150 Dimension drawings 243 ...
Page 245: ...R11 IP22 UL Type 1 and IP42 UL Type 1 Filtered option B054 option E206 Dimension drawings 245 ...
Page 246: ...R11 IP22 UL Type 1 option E202 246 Dimension drawings ...
Page 267: ... Declaration of conformity The Safe torque off function 267 ...
Page 268: ...268 The Safe torque off function ...
Page 280: ...280 ...