Danfoss MCE 101 Fact sheet
Fact Sheet
VLT® Brake Resistor MCE 101
Dissipates energy generated during braking
When the speed reference of a frequency converter is reduced during braking,
the motor acts as a generator.
With no brake resistor, the intermediate circuit voltage of the frequency
converter would continue to increase,
until it cuts out for protection.
Energy generated during braking is
absorbed by the VLT® Brake Resistor
MCE 101, protecting electrical components from heating up.
The brake resistors in this series are all
external components. Therefore, the
brake resistor does not form an integral
part of the frequency converter.
Precision
electrical match to
individual VLT® drive
power sizes
Advantages
Select horizontal or vertical braking
profi le
Flexibility to place the brake resistor
The Danfoss brake resistor range
consists of brake resistors for
Horizontal motion:
conveyors and trolleys
optimally for heat dissipation
considerations
150/160%
The VLT® Brake Resistor MCE 101
series is optimised for these Danfoss
frequency converters:
VLT® Micro Drive FC 51
VLT® HVAC Drive FC 102
VLT® AQUA Drive FC 202
VLT® AutomationDrive FC 300
VLT® AutomationDrive FC 360
VLT® Decentral Drive FCD 302
VLT® 2800
Three concepts are available:
Aluminium-housed fl at-pack
Tyipcal braking profile for horizontal motion
(10 % duty cycle)
Vertical motion:
cranes, hoists, and elevators
100%
brake resistors
Aluminium-housed compact
brake resistors
Steel grid brake resistors
Typical braking profile for vertical motion
(40 % duty cycle)
Feature Benefit
Compact design – Less wall or fl oor space required
External component
Flexible installation
Integrated thermal switch – Monitors and prevents overload
Cooled by natural convection
Precise match to each individual VLT® drive
power size for FC 102, FC 202, FC 301, FC 302
– Select horizontal or vertical braking profi le
– Flexibility to place the brake resistor optimally
for heat dissipation considerations
Wall or fl oor mounting
– Full range of protection classes:
IP20, IP21, IP54 and IP65
Connect to drive via
– Screw terminal connections or
– fi xed unscreened cables
– No fan required
– No service and maintenance required
– Cost saving, no over-dimensioning required
– Compatible with all VLT® drives voltage classes:
T2, T4, T5, T6 and T7
150/160%
www.vlt-drives.danfoss.com
The requirements for brake resistors
vary in different applications.
To determine the optimal brake resistor
for a specific application, consult the
VLT® Brake Resistor MCE 101 Design
Guide – MG.90.O2.02.
This Design Guide contains easy-to-use
selection tables.
Accessories for flat-pack
brake resistors
Footprint bracket
Enables mounting parallel to the wall,
behind the VLT® drive
L-profile bracket
Enables book-style mounting
perpendicular to the wall
Specifications
Environment
Ambient temperature range -40 to 70 °C
Maximum temperature at housing 300 °C
Maximum relative humidity 5-85%, non-condensation during operation
Power derating as a function of ambient temperature
Steel grid brake resistors, IP20
Aluminium-housed compact brake resistors, IP21
Aluminium-housed brake resistors – compact
and fl at-pack, IP54
Aluminium compact brake resistors, IP65
Cooling requirements
The brake resistors are cooled by free natural convection. The power ratings of the resistors refer to
cooling conditions with free natural cooling. The requirements for minimum clearances must be
observed during installation.
Compliance
CE
Continuous power 100% @ 40 °C
to 70% @ 70 °C, linear
Continuous power 100% @ 40 °C
to 75% @ 70 °C, linear
Continuous power 100% @ 40 °C
to 75% @ 70 °C, linear
Continuous power 100% @ 40 °C
to 50% @ 70 °C, linear
A selection of the vertical-mounted units are
UL-recognized
Compact
size and fl exibility in
installation
Aluminimum-housed flat-pack, IP54 Aluminimum- housed compact with screw
Aluminimum-housed compact, IP54
fixed unscreened cable
Danfoss VLT Drives, Ulsnaes 1, DK-6300 Graasten, Denmark, Tel. +45 74 88 22 22, Fax +45 74 65 25 80, www.danfoss.com/drives, E-mail: info@danfoss.com
terminal connection box, IP21
Aluminimum- housed compact with screw
terminal connection box, IP 65
Steel grid, IP20
DKDD.PFM.401.A1.02 © Copyright Danfoss Drives | Danfoss VLT Drives PE-MSMBM | 2015.06
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