Specifications

MCD3000 Series
MG.15.A4.22 - VLT is a registered Danfoss trademark 39
Desi
g
n Guide
3. Refer to the Current Ratings tables in the
Specifications section of this manual. Select a
Start Current column within the Current Ratings
table that is greater than the required start current
calculated above. Use this column to select a
MCD3000 model with a FLC rating greater or
equal to the motor nameplate FLC.
■
Typical applications
MCD3000 soft starters can offer benefits for almost all
motor starting applications. Typical advantages are
highlighted in the table below.
ication Benefits
Pumps
• Minimised hydraulic shock in
pipelines during start and stop.
• Reduced starting current.
• Minimised mechanical stress on
motor shaft.
• Undercurrent protection prevents
damage from block pipe or low
water situations.
• Automatic reset functionality
ensures continued operation of
unmanned pump stations.
• Phase rotation protection prevents
damage from reverse pump
rotation.
• Instantaneous overload protection
prevents damage from debris
sucked into the pump.
Conveyor
Belts
• Controlled soft start without
mechanical shocks, e.g. bottles on
a belt do not fall over during
starting, minimised belt stretch,
reduced counter balance stress.
• Controlled stop without mechanical
shocks. Soft stop.
• Optimum soft start performance
even with varying starting loads,
e.g. coal conveyors started loaded
or unloaded.
• Extended mechanical lifetime.
• Maintenance-free.
Centrifuges
• Smooth application of torque
prevents mechanical stress.
• Reduced starting times over
star/delta starting.
• Reduced stopping times.
(D.C.Brake and soft braking).
ation Benefits
Ski Lifts
• Jerk free acceleration increases
skier comfort and prevents
swinging T-bars etc.
• Reduced starting current allows
starting of large motors on a weak
power supply.
• Smooth and gradual acceleration
whether the ski lift is lightly or
heavily loaded.
• Phase rotation protection prevents
operation in reverse direction.
Compressors
• Reduced mechanical shock
extends the life of the compressor,
couplings and motor.
• Limited start current enables large
compressors to be started when
maximum power capacity is
limited.
• Phase rotation protection prevents
operation in reverse direction.
• Instantaneous overload protection
prevents damage possible if liquid
ammonia enters the compressor
screw.
Fans
• Extended coupling life through
reduced mechanical shock.
• Reduced start current enables
large fans to be started when
maximum power capacity is
limited.
• Phase rotation protection prevents
operation in reverse direction.
Mixers
• Gentle rotation during start-up
reduces mechanical stress.
• The starting current is reduced.
Bandsaws
• Reduced saw band replacement
times because the MCD3000 soft
braking can stop the motor quickly.
• Extended saw band life because
torque shocks during start are
eliminated.
• Easier saw band alignment. Slow
acceleration allows saw bands to
be ’tracked’ without jogging.
• Maximum overload capability
available for ride through of
operating overloads. The
MCD3000 motor thermal model
Appl
Applic