Chapter 3 – Electrical Installation3-2ACx=ACS/ACC/ACPACS/ACC/ACP 604/607 DrivesDisconnecting Means ACx 607 units include a door interlocked fused disconnect. This switchdoes not switch off the power from the EMC Line Filter of ACS/ACC607-0400-3, -0490-3/5/6, -0610-3/5/6 and -0760-5/6 units. For ACS/ACC 607-0400-3, -0490-3/5/6, -0610-3/5/6 and -0760-5/6 units withEMC Line Filter, and for the ACx 604 module an input powerdisconnecting means must be installed between the ac power sourceand the ac drive. The disconnecting means must conform to applicablesafety regulations. The disconnecting means must be locked to theopen position during installation and maintenance work.The motor must not be controlled with the supply disconnecting means;instead, the and keys of the Control Panel or commands via theI/O board of the ACx 600 should be used. The maximum number ofcharging cycles of the d.c. capacitors of ACx 600 (i.e. power-ups byapplying power) is five in ten minutes.The drive disconnecting means can serve as the motor disconnectingmeans if it complies with applicable safety regulations.Input Line Fuses Input line Fuses are required to protect the input bridge of the ACx 600in the event of an internal short circuit or ground fault. The ACx 607 isequipped with internal input fuses listed on page A-3 inAppendix A.Fuses are not included in the ACx 604 and must be installed externallyto the drive chassis. The recommended fuses are the ultrarapid fuseslisted on page A-3. To ensure that adequate protection is maintained,do not install slower types of fuses or allow blown fuses to be replacedwith slower types.The fuses recommended for input bridge protection can be installed asdrive and motor branch-circuit short-circuit and ground fault protectionif they comply with applicable safety regulations.Motor OverloadProtectionThe ACx 607 can provide overload protection for the motor bymonitoring a thermostat or thermistor in the motor or by calculating themotor temperature from measured operating data. The overloadprotection provided by the drive complies with the requirements ofUL508c. Additional overload protection is not required unless morethan one motor is connected to the drive or unless additional protectionis required by applicable safety regulations.Power Cables The input power, motor and ground cables must be sizedaccording tolocal regulations:1. The cable must carry the ACx 600 load current.2. The cable terminals of the ACx 600 warm up to 60 °C in use. Thecable must be rated for at least 60 °C maximum operating