Eaton Industrial Switchgear - xStart switching, protections and actuating motors

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2010 CA08103002Z-EN
9/40 DM4 soft starter
DM4
DM4Description
L1 L2 L3
T1 T2 T3
Operation as
three-phase soft starter
DM4 soft starter series are soft
starters for standard three-phase
asynchronous motors. They round off
Eaton's soft starter range with devices
meant for more demanding applications.
With a power range (assigned motor
rating) starting with 7.5 kW, DM4 soft
starters are also suitable for demanding
automation tasks.
Their terminal type determines the
rating range:
• Inline terminal type (upstream of
load = standard):
7.5 to 500 kW at 400 V.
• Delta terminal type:
11 to 900 kW at 400 V,
each phase of the soft starter being
connected in series with the individual
motor windings
(6 lines required, motor delta
connected only).
Features
• Current limitation
• High overload withstand capability
• Large rating range up to 500 kW (or
900 kW in delta terminal type)
• Predefined parameter sets can be
selected for standard applications
• All parameters also individually ad-
justable
• Keypad with plain text display
(optional)
• Programmable relay and analog
outputs
• Networkable
• Voltage controller function
(generalized phase control) can
be implemented for each software
changeover.
Typical applications as
soft starter
• Pump drives: pressure surges are
prevented through soft starting. The
mechanical load on the whole plant
is reduced and the plant compo-
nents’ service life increases.
• Fan drives and compressors: The
soft start prevents belt slippage and
premature wear. This in turn lowers
the operating costs and increases
the durability of the plant.
• Conveyors: Instead of startingwith a
jolt, the conveyor starts up gently
and the transported goods do not
fall over. The mechanical stress on
the conveyor is reduced and its
lifespan increased.
• Circular and ribbon saws: The
current limitation at startup pre-
vents current peaks. This results in
energy savings and reduced
electricity bills.
• Agitators, mixers, mills, crushers:
the same advantages described
above.
Operation as three-phase
controller
The DM4 devices can be changed over
with the software to three-phase
controller operation. The rating range
is 16 to 900 A at 400 V (standard
connection only, in-line connection
possible). They can be operated in
pure controller mode or with a closed-
loop control circuit.
The units each have two analog inputs
for setpoint/actual values and an
additional built-in current feedback
loop.
Note: A keypad or the serial interface
and PC software are required to
configure controller operation.
Typical applications as three-
phase controller
• Heater loads: Continuous tempera-
ture regulation reduces thermal and
mechanical load on heating
elements to increase their lifespan.
• Lighting control systems: Gentle
switching on of lamps reduce
current consumption in cold state.
Utilization of the lamps’ ideal
operating point reduces their
current consumption at the same
light emission and extends their
lifespan. This results in energy
savings and reduced electricity
bills.
• Ozone generators: Regulation of
high-voltage transformers.
Documentation
You can download the documentation
for the soft starters from the Internet:
Installation instructions
AWA8250-1704 (for devices within a
rating range from 7.5 to 37 kW)
AWA8250-1751 (for devices within a
rating range from 45 to 75 kW)
AWA8250-1752 (for devices within a
rating range from 90 to 200 kW)
AWA8250-1783 (for devices within a
rating range from 250 to 500 kW)
Manuals
AWB8250-1341
("Hardware and engineering")
AWB8250-1346
("Design of soft starters")