Accessories For Vlt 2800; Brake Resistors; Dynamic Braking - Danfoss VLT 2800 Design Manual

Introduction to VLT 2800

1.10 Accessories for VLT 2800

Type
Motor coil
RFI 1B filter
RFI 1B/LC filter 4 A
RFI 1B/LC filter 9.1 A
EMC filter
EMC filter
EMC filter
NEMA 1 terminal cover
NEMA 1 terminal cover
NEMA 1 terminal cover
IP 21 top cover
IP 21 top cover
IP 21 top cover
IP 21 top cover
LCP 2 control unit
Cable for LCP 2 control unit
DeviceNet cable
LCP 2 remote-mounting kit
LOP (Local Operation Pad)
MCT 10
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:
MG27E402
Design Guide
Description
The motor coil module can be used for VLT 2803-2875
The RFI 1B filter module can be used for VLT 2803-2875
The RFI 1B/LC filter 4 A can be used for VLT 2803-2805 200-240 V and VLT
2805-2815 380-400 V
RFI 1B/LC filter 9.1 A can be used for VLT 2807-2815 200-240 V and VLT
2822-2840 380-400 V
EMC filter for long motor cables can be used for VLT 2805-2815 380-480 V
EMC filter for long motor cables can be used for VLT 2822-2840 380-480 V
EMC filter for long motor cables can be used for VLT 2855-2875 380-480 V
VLT 2803-2815 200-240 V, VLT 2805-2815 380-480 V
VLT 2822 200-240 V, VLT 2822-2840 380-480 V
VLT 2840, VLT 2840 PD2 200-240 V, VLT 2855-2875 380-480 V
VLT 2803-2815 200-240 V, VLT 2805-2815 380-480 V
VLT 2822 200-240 V, VLT 2822-2840 380-480 V
VLT 2840 200-240 V, VLT 2822 PD2, VLT 2855-2875 380-480 V
VLT 2880-2882 380-480 V, VLT 2840 PD2
LCP 2 for programming the frequency converter
Cable from LCP 2 to frequency converter
Cable for DeviceNet connection
Kit for remote-mounting of LCP 2 (incl. 3 m cable, excl. LCP 2)
LOP can be used for setting the reference and start/stop via the control
terminals.
Set-up software
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.
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.
Danfoss A/S © Rev. May/2014 All rights reserved.
•
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.
WARNING
1
Ordering no.
195N3110
195N3103
195N3100
195N3101
192H4719
192H4720
192H4893
195N1900
195N1901
195N1902
195N2179
195N2180
195N2181
195N2182
175N0131
175Z0929
195N3113
175Z0850
175N0128
130B1000
17
1