Danfoss VT2800 Series Design Manual

Contents

VLT ® 2800 Series■ Safety clampIf the galvanic isolation (PELV) betweencontrol terminals and high-voltage terminalsis to be maintained, the accompanyingsafety clamp must be fitted to VLT 2803-2815,200-240 V, and VLT 2805-2815, 380-480 V.■ Pre-fusesFor all unit types, external pre-fuses must be fitted in themains supply to the frequency converter. For UL/cULapplications with a mains voltage of 200-240 Volt, usepre-fuses type Bussmann KTN-R (200-240 Volt) orFerraz Shawmut type ATMR (max. 30A). For UL/cULapplications with a mains voltage of 380-480 Volt, usepre-fuses type Bussmann KTS-R (380-480 Volt). SeeTechnical data for correct dimensioning of pre-fuses.■ Mains connectionPlease note that at 1 x 220-240 Volt the neutral wiremust be attached to terminal N (L2) and the phasewire must be connected to terminal L1 (L1) .No. N (L2) L1 (L1) (L3) Mains voltage 1 x 220-240 VN L1No. 95 Earth connectionNo. N (L2) L1 (L1) (L3) Mains voltage 3 x 220-240 VL2 L1 L3No. 95 Earth connectionNo. 91 92 93 Mains voltage 3 x 380-480 VL1 L2 L3No. 95 Earth connectionNB!:Please check that the mains voltage fits themains voltage of the frequency converter, whichcan be seen from the nameplate.400-Volt units with RFI-filters may not beconnected to mains supplies in which thevoltage between phase and earth is morethan 300 Volts. Please note that for the IT mainsand the delta earth the mains voltage can exceed300 Volts between phase and earth. Units with typecode R5 can be connected to mains supplies withup to 400 V between phase and earth.See Technical data for correct dimensioning ofcable cross-section. See also the section entitledGalvanic isolation for further details.■ Motor connectionConnect the motor to terminals 96, 97, 98.Connect earth to terminal 99.No. 96 97 98 Motor voltage 0-100% ofmains voltage.U V W 3 wires of motorU1W2V1U2W1V26 wires out of motor, DeltaconnectedU1 V1 W1 6 wires out of motor, StarconnectedU2, V2, W2 to beinterconnected separely(optional terminal block)No. PE Earth connectionSee Technical data for correct dimensioningof cable cross-section.All types of three-phase asynchronous standardmotors can be connected to a frequency converter.Normally, small motors are star-connected (230/400V, / Y). Large motors are delta-connected (400/690V, / Y). The correct connection mode and voltagecan be read from the motor nameplate.NB!:In motors without phase insulation paper,an LC filter should be fitted on the outputof the frequency converter.MG.28.E9.02 - VLT is a registered Danfoss trademark50