Brake Resistors; Remote Mounting Kit For Lcp; Ip 21/Ip 4X/ Type 1 Enclosure Kit; Lc Filters - Danfoss VLT AutomationDrive FC 300 Design Manual

FC 300 Design Guide

Brake Resistors

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Brake resistors are used in applications where high dynamics are needed or a high inertia load has to be
stopped. The brake resistor is used to remove the energy from the DC link in the frequency converter.
Code numbers for brake resistors: See section Hot to Order.

Remote mounting Kit for LCP

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The Local Control Panel can be moved to the front
of a cabinet by using the remote build in kit. The
enclosure is the IP55. The fastening screws must
be tightened with a torque of max. 1 Nm.

IP 21/IP 4X/ TYPE 1 Enclosure Kit

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IP 20/IP 4X top/ TYPE 1 is an optional enclosure element available for IP 20 Compact units.
If the enclosure kit is used, an IP 20 unit is upgraded to comply with enclosure IP 21/ 4X top/TYPE 1.
The IP 4X top can be applied to all standard IP 20 FC 30X variants.
For more information, see chapter How to Install.

LC Filters

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When a motor is controlled by a frequency converter, resonance noise will be heard from the
motor. This noise, which is the result of the design of the motor, arises every time an inverter
switch in the frequency converter is activated. The frequency of the resonance noise thus
corresponds to the switching frequency of the frequency converter.
For the FC 300 Series, Danfoss can supply an LC filter to dampen the acoustic motor noise.
The filter reduces the ramp-up time of the voltage, the peak load voltage U
current ∆I to the motor, which means that current and voltage become almost sinusoidal.
Consequently, the acoustic motor noise is reduced to a minimum.
The ripple current in the LC Filter coils, will also cause some noise. Solve the problem
by integrating the filter in a cabinet or similar.
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How to Select Your VLT
MG.33.B4.02 - VLT is a registered Danfoss trademark
Technical data
Enclosure:
Max. cable length between VLT and
unit:
Communication std:
and the ripple
PEAK
IP 65 front
3 m
RS 485