Separate Control Cable Ducts; Implementing Thermal Overload And Short-Circuit Protection - ABB ACS560 Hardware Manual

76 Planning the electrical installation

Separate control cable ducts

Put 24 V DC and 230 V AC (120 V AC) control cables in separate ducts, unless the
24 V DC cable is insulated for 230 V AC (120 V AC) or insulated with an insulation
sleeving for 230 V AC (120 V AC).
￭

Implementing thermal overload and short-circuit protection

Protecting the input cabling and the drive upon a short-circuit
To protect the input cabling in short-circuit situations, install fuses or a suitable
circuit breaker at the supply side of the cabling.
The drive is equipped with internal AC fuses as standard. In case of a short-circuit
inside the drive, the AC fuses protect the drive, restrict drive damage, and prevent
damage to adjoining equipment.
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.
Protecting the motor against thermal overload
According to regulations, the motor must be protected against thermal overload
and the current must be switched off when overload is detected. The drive includes
a motor thermal protection function that protects the motor and switches off the
current when necessary. Depending on a drive parameter value, the function either
230 V AC
(120 V AC)
230 V AC
(120 V AC)
24 V DC
24 V DC