8.2 Connections - Frame Sizes D, E and F8.2.1 TorqueWhen tightening all electrical connections it is very important to tightenwith the correct torque. Too low or too high torque results in a bad elec-trical connection. Use a torque wrench to ensure correct torqueIllustration 8.18: Always use a torque wrench to tighten thebolts.Frame size Terminal Torque Bolt sizeD1, D2, D3 and D4 MainsMotor 19 Nm (168 in-lbs) M10Load sharingBrake 9.5 Nm (84 in-lbs) M8E1 and E2 MainsMotorLoad sharing19 NM (168 in-lbs) M10Brake 9.5 Nm (84 in-lbs) M8F1, F2, F3 and F4 MainsMotor 19 Nm (168 in-lbs) M10Load sharingBrakeRegen19 Nm (168 in-lbs)9.5 Nm (84 in-lbs)19 Nm (168 in-lbs)M10M8M10Table 8.1: Torque for terminals8.2.2 Power ConnectionsCabling and FusingNB!Cables GeneralAll cabling must comply with national and local regulations on cable cross-sections and ambient temperature. UL applications require75 °C copper conductors. 75 and 90 °C copper conductors are thermally acceptable for the frequency converter to use in non ULapplications.The power cable connections are situated as shown below. Dimensioning of cable cross section must be done in accordance with the current ratings andlocal legislation. See theSpecifications section for details.For protection of the frequency converter, the recommended fuses must be used or the unit must be with built-in fuses. Recommended fuses can beseen in the tables of the fuse section. Always ensure that proper fusing is made according to local regulation.The mains connection is fitted to the mains switch if this is included.FC 300 Design Guide 8 Electrical InstallationMG.33.BC.02 - VLT® is a registered Danfoss trademark 1578
