Danfoss VLT 2800 Design Manual

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Contents

Danfoss VLT 2800 Design Manual Manual pdf 19 page image

1.10 Accessories for VLT 2800Type Description Ordering no.Motor coil The motor coil module can be used for VLT 2803-2875 195N3110RFI 1B filter The RFI 1B filter module can be used for VLT 2803-2875 195N3103RFI 1B/LC filter 4 A The RFI 1B/LC filter 4 A can be used for VLT 2803-2805 200-240 V and VLT2805-2815 380-400 V195N3100RFI 1B/LC filter 9.1 A RFI 1B/LC filter 9.1 A can be used for VLT 2807-2815 200-240 V and VLT2822-2840 380-400 V195N3101EMC filter EMC filter for long motor cables can be used for VLT 2805-2815 380-480 V 192H4719EMC filter EMC filter for long motor cables can be used for VLT 2822-2840 380-480 V 192H4720EMC filter EMC filter for long motor cables can be used for VLT 2855-2875 380-480 V 192H4893NEMA 1 terminal cover VLT 2803-2815 200-240 V, VLT 2805-2815 380-480 V 195N1900NEMA 1 terminal cover VLT 2822 200-240 V, VLT 2822-2840 380-480 V 195N1901NEMA 1 terminal cover VLT 2840, VLT 2840 PD2 200-240 V, VLT 2855-2875 380-480 V 195N1902IP 21 top cover VLT 2803-2815 200-240 V, VLT 2805-2815 380-480 V 195N2179IP 21 top cover VLT 2822 200-240 V, VLT 2822-2840 380-480 V 195N2180IP 21 top cover VLT 2840 200-240 V, VLT 2822 PD2, VLT 2855-2875 380-480 V 195N2181IP 21 top cover VLT 2880-2882 380-480 V, VLT 2840 PD2 195N2182LCP 2 control unit LCP 2 for programming the frequency converter 175N0131Cable for LCP 2 control unit Cable from LCP 2 to frequency converter 175Z0929DeviceNet cable Cable for DeviceNet connection 195N3113LCP 2 remote-mounting kit Kit for remote-mounting of LCP 2 (incl. 3 m cable, excl. LCP 2) 175Z0850LOP (Local Operation Pad) LOP can be used for setting the reference and start/stop via the controlterminals.175N0128MCT 10 Set-up software 130B1000Table 1.7 Accessory List1.11 Brake Resistors1.11.1 Dynamic BrakingWith the VLT 2800, the dynamic braking quality in anapplication can be improved in 2 ways, either with brakeresistors or AC braking.Danfoss offers a complete range of brake resistors for allVLT 2800 frequency converters.A brake resistor applies a load to the intermediate circuitduring braking, thereby ensuring that the brake power canbe absorbed by the brake resistor.Without a brake resistor, the intermediate circuit voltage ofthe frequency converter may continue to rise, until cuttingout for protection. Using a brake resistor can brake quicklywith large loads, e.g. on a conveyor belt.Danfoss has selected a solution in which the brake resistoris not integrated into the frequency converter. This givesthe user the following advantages:• The resistor's cycle time can be selected asrequired.• The heat generated during braking can bediverted outside the panel cabinet, where theenergy can possibly be utilised.• No overheating of the electronic components,even if the brake resistor is overloaded.AC braking is an integrated function that is used forapplications in which there is a need for limited dynamicbraking. The AC braking function makes it possible toreduce the brake power in the motor instead of in a brakeresistor. The function is intended for applications wherethe required braking torque is less than 50% of ratedtorque. AC braking is selected in parameter 400 Brakefunction.WARNINGDo not use the AC brake if the required braking torqueis more than 50% of rated braking torque. There is a riskof equipment damage and personal injury. To ensuresafety of equipments and people, use a brake resistor insuch cases.Introduction to VLT 2800 Design GuideMG27E402 Danfoss A/S © Rev. May/2014 All rights reserved. 171 1