60 Guidelines for planning the electrical installation Continuous motor cable shield or enclosure for equipment in themotor cableTo minimize the emission level when safety switches, contactors, connection boxes orsimilar equipment are installed on the motor cable between the drive and the motor:• European Union: Install the equipment in a metal enclosure with 360 degreegrounding for the shields of both the incoming and outgoing cable, or connect theshields of the cables otherwise together.• US: Install the equipment in a metal enclosure in a way that the conduit or motor cableshielding runs consistently without breaks from the drive to the motor.Implementing thermal overload and short-circuitprotection Protecting the drive and input power cable in short-circuitsProtect the drive with fuses (a) and the input cable with fuses (b) as shown below:Size the fuses or the circuit breaker at the distribution board according to local regulationsfor the input cable protection. Select the fuses for the drive according to the instructionsgiven in chapter Technical data. The fuses for the drive protection will restrict drivedamage and prevent damage to adjoining equipment in case of a short-circuit inside thedrive.Note 1: If the fuses for the drive protection are placed at the distribution board and theinput cable is dimensioned according to the nominal input current of the drive given in therating table on page 113, the fuses will protect also the input cable in short-circuitsituations, restrict drive damage and prevent damage to adjoining equipment in case of ashort-circuit inside the drive. No separate fuses for the input cable protection are needed.Note 2: Circuit breakers must not be used without fuses. For more information, contactABB. Protecting the motor and motor cable in short-circuitsThe drive protects the motor cable and motor in a short-circuit situation when the motorcable is dimensioned according to the nominal current of the drive. No additionalprotection devices are needed.~~M3~abACS580-04
