2.3 Aluminium-housed Brake Resistors
2.3.1 Aluminium-housed Flat-pack Brake
Resistors
The flat-pack brake resistor is an anodized aluminium-
housed resistor suitable for wall mounting or on a
footprint or an L-profile bracket. The L-profile bracket is
used for rear mounting. The brake resistor is designed for
high pulse loads of up to 40 times the nominal load and is
therefore suitable for both vertical and horizontal
applications. The enclosure protection is IP54 or IP65.
Illustration 2.3 Flat-pack IP54
2.3.2
Aluminium-housed Compact Brake
Resistor
The compact brake resistor is housed in aluminium profiles
with pre-mounted brackets for wall mounting. It is
designed for high pulse loads of up to 60 times the
nominal load and is therefore used for both horizontal and
vertical loads. The enclosure protection class is either IP21,
IP54 or IP65. The brake resistor IP classes IP21 and IP65 are
equipped with a connection box containing cable glands
and cable connection to the resistor and the temperature
switch. IP54 versions have fixed unscreened cables.
Illustration 2.4 CBR-V-CT IP54
Illustration 2.5 CBR-V-DT IP21
Illustration 2.6 CBR-V-BT IP65
2.4 Steel Grid Brake Resistors
The steel grid brake resistor is steel grid housed and
consists of multiple elements. This brake resistor is suitable
for pulse loads between 10 and 20 times the nominal load,
suitable for frequent braking applications such as cranes,
hoists and elevators. It is supplied in an IP20 enclosure
with cable glands and has a built-in temperature switch.
Illustration 2.7 Steel Grid House IP20
Product Overview Design Guide
6 Danfoss A/S © Rev. 05/2014 All rights reserved. MG90O202
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