1.10 Accessories for VLT 2800
Type Description Ordering no.
Motor coil The motor coil module can be used for VLT 2803-2875 195N3110
RFI 1B filter The RFI 1B filter module can be used for VLT 2803-2875 195N3103
RFI 1B/LC filter 4 A The RFI 1B/LC filter 4 A can be used for VLT 2803-2805 200-240 V and VLT
2805-2815 380-400 V
195N3100
RFI 1B/LC filter 9.1 A RFI 1B/LC filter 9.1 A can be used for VLT 2807-2815 200-240 V and VLT
2822-2840 380-400 V
195N3101
EMC filter EMC filter for long motor cables can be used for VLT 2805-2815 380-480 V 192H4719
EMC filter EMC filter for long motor cables can be used for VLT 2822-2840 380-480 V 192H4720
EMC filter EMC filter for long motor cables can be used for VLT 2855-2875 380-480 V 192H4893
NEMA 1 terminal cover VLT 2803-2815 200-240 V, VLT 2805-2815 380-480 V 195N1900
NEMA 1 terminal cover VLT 2822 200-240 V, VLT 2822-2840 380-480 V 195N1901
NEMA 1 terminal cover VLT 2840, VLT 2840 PD2 200-240 V, VLT 2855-2875 380-480 V 195N1902
IP 21 top cover VLT 2803-2815 200-240 V, VLT 2805-2815 380-480 V 195N2179
IP 21 top cover VLT 2822 200-240 V, VLT 2822-2840 380-480 V 195N2180
IP 21 top cover VLT 2840 200-240 V, VLT 2822 PD2, VLT 2855-2875 380-480 V 195N2181
IP 21 top cover VLT 2880-2882 380-480 V, VLT 2840 PD2 195N2182
LCP 2 control unit LCP 2 for programming the frequency converter 175N0131
Cable for LCP 2 control unit Cable from LCP 2 to frequency converter 175Z0929
DeviceNet cable Cable for DeviceNet connection 195N3113
LCP 2 remote-mounting kit Kit for remote-mounting of LCP 2 (incl. 3 m cable, excl. LCP 2) 175Z0850
LOP (Local Operation Pad) LOP can be used for setting the reference and start/stop via the control
terminals.
175N0128
MCT 10 Set-up software 130B1000
Table 1.7 Accessory List
1.11
Brake Resistors
1.11.1 Dynamic Braking
With the VLT 2800, the dynamic braking quality in an
application can be improved in 2 ways, either with brake
resistors or AC braking.
Danfoss offers a complete range of brake resistors for all
VLT 2800 frequency converters.
A brake resistor applies a load to the intermediate circuit
during braking, thereby ensuring that the brake power can
be absorbed by the brake resistor.
Without a brake resistor, the intermediate circuit voltage of
the frequency converter may continue to rise, until cutting
out for protection. Using a brake resistor can brake quickly
with large loads, e.g. on a conveyor belt.
Danfoss has selected a solution in which the brake resistor
is not integrated into the frequency converter. This gives
the user the following advantages:
•
The resistor's cycle time can be selected as
required.
•
The heat generated during braking can be
diverted outside the panel cabinet, where the
energy 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 for
applications in which there is a need for limited dynamic
braking. The AC braking function makes it possible to
reduce the brake power in the motor instead of in a brake
resistor. The function is intended for applications where
the required braking torque is less than 50% of rated
torque. AC braking is selected in parameter 400 Brake
function.
WARNING
Do not use the AC brake if the required braking torque
is more than 50% of rated braking torque. There is a risk
of equipment damage and personal injury. To ensure
safety of equipments and people, use a brake resistor in
such cases.
Introduction to VLT 2800 Design Guide
MG27E402 Danfoss A/S © Rev. May/2014 All rights reserved. 17
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