IT. Intelligent soft starting solutions.
Eaton offers soft starters
that extend the life of your
mechanical components,
provide the safety and
reliability of 24V DC control
power, and retrofit into
existing enclosures and
Motor Control Centre
compartments. Not only
that, but Eaton’s IT. Soft
Starters’ small size and ridethrough capability will meet
the most demanding design
and system expectations.
With a direct focus on
control system design and
customer profitability, Eaton
is proud to offer the
Intelligent Technologies (IT.)
Soft Starters for reduced
voltage applications – a
complete offering for the
OEM and end-user
customers.
Our S752, S801 and S811
Soft Starters provide
controlled acceleration and
Eaton gives you the choice
With an impressive line of
soft starters designed with
small and large motor
applications in mind, Eaton
gives you choices. Whether
it’s the S752, S801 or the
communicating S811 line
of Soft Starters, you are
guaranteed to find an
Eaton solution to fit your
application needs.
Small size and easy
configuration make these
soft starters ideal for use in
the most demanding and
sophisticated commercial
and industrial applications.
We have IT. for every
application, offering a
complete range of solidstate reduced voltage
starters optimised to satisfy
your application
requirements.
deceleration of single and
three-phase motors and
offer a range of control and
application flexibility to
meet the needs of most
OEM and end-user
applications.
The low cost solutions to
reduced voltage starting
applications, the IT. solidstate soft starters have all
the features and options
you value.
From advanced starting and
stopping control, to
integrated functions and
motor protection and
communication capabilities,
the IT. line of soft starters
provides a unique
combination of soft starting
and flexible protective
features along with the
technological advances
you’ve come to expect from
Eaton’s products.
Why choose soft starting?
An Eaton IT. Soft Starter
uses Silicon Controlled
Rectifiers (SCRs) to
electronically reduce the
voltage output to the motor,
allowing for a ramp up to
the line voltage.
Soft starting a motor will
reduce mechanical
component shock,
minimising coupling and
shaft damage, preventing
rotor and winding failure,
and stopping drive belt
squeal and breakage. With
an IT. Soft Starter,
mechanical system
components can be
significantly reduced in size
because of lower starting
torque values (250-500%
FLA), which also prolongs
their life.
Soft starting can also
prevent damage to loads by
eliminating sudden system
acceleration and violent
speed variations –
contributing to fewer
mechanical breakdowns,
improving the quality of the
product and process. The
reduced inrush currents will
also decrease stress on the
electrical distribution
system, increasing the life
of electrical components.
Applications
Aggregate
•
Reduced starting torque
lowers stress on the
mechanical drive and
driven load, avoiding
injury and machinery
damage
• Overload protection along
with other sophisticated
trip features increase
reliability and uptime
• Low and medium voltage
solutions for aggregateduty applications with
simplified mounting for
the needed flexibility
• Communications allow for
real-time system
monitoring
• Customer service and
technical support when
you need it
Pumping/Wastewater
•
Reduces snapping of
belts, extending the life of
the belt 2-6 times
• Pump control algorithm
limits pressure surges,
maximising the life of
pumping and piping
systems while minimising
costs associated with
system downtime. It also
eliminates “water
hammer” so applications
require fewer pipe
hangers, which contribute
to fewer leaks, increasing
pump life
• Communications give you
the flexibility associated
with the real-time
monitoring of process
and diagnostic data and
insight into the condition
of equipment and processes
without a site visit
• Reduced torque decreases
stress on equipment,
lowering failure rates
HVAC
•
Communication
capabilities enable
integration into building
management systems for
easy monitoring and
troubleshooting
• Small size permits the use
of smaller panels and
enclosures, allowing you
to capitalise on significant
space savings
Conveyors
•
Smooth starts and stops
• No sliding or tilting
of goods
• No snapping of chains
or belts
• Communication capability
with IT. SNAP Modules
Compressors
•
Reduces starting currents
by 40-50% compared to
direct-on-line starters
• Provides fast start of the
compressor
Fans & Pumps
•
Reduces squealing or
snapping of belts,
extending the life 2
to 6 times
• Reduces inrush currents
• Unlimited starts and stops
• Soft Stop minimises
“water hammer”
Elevators
Smooth starts and stops
•
• Reduced wear on belts,
gears, chains, clutches,
shafts and bearings –
decreasing required
maintenance and
extending the life
• Reduced inrush currents
to minimise voltage
disturbances
Soft starting vs. direct-on-line starting
Other benefits include:
•
Soft stopping where a
stop time is greater than
coast to rest time — a
feature that is beneficial
in material handling,
conveyor and pumping
applications.
Pumping/Wastewater
•
Reducing line brown-outs
and reducing or
eliminating the costs
associated with power
distribution violations. An
IT. Soft Starter controls
peak power demand
while a full-voltage starter
can apply from 600 up to
800% FLA on start-up.
What value do Eaton IT. Soft Starters offer your business?
Keeping heat under control
All the IT. Soft Starters
featured here have run
bypass mode, designed to
significantly reduce the heat
generated by the starter,
minimising enclosure sizes
and costs. The sophisticated
design removes the soft
starter SCRs from the circuit
after the contacts close
during the bypass
operation. This reduces the
internal heating created by
the SCRs, while the bypass
contactor directly connects
the motor to the line and
improves system efficiency
by reducing internal power
losses. On top of that, the
bypass contactor is internal
to the soft starter,
eliminating the need for
additional devices and
further reducing enclosure
sizes and minimising
installation time.
Packaged IT. Soft Starters
give you more motor
current in dramatically
reduced enclosures. This is
possible because IT. has
fewer parts and generates
less heat, which gives you
more power per MCC
section or square mm of
wall space. IT. gives you the
maximum performance in
the smallest package.
The graph illustrates the
typical heat loss from
conventional Soft Starters
No need to worry when IT. is at work
compared to that of Eaton’s
IT. Soft Starters. What does
less heat mean? It means
substantial cost savings
Soft starter heat lost comparison
S801, S811 Soft Starter
when it comes to enclosure
sizes and enclosure
ventilating requirements.
Eaton IT. Soft Starters
feature IP20 rated fingersafe terminals, with 24V DC
control. When your
personnel and equipment
are at risk, nothing but the
safest, most reliable soft
starter will do – IT. is the
answer.
The hazards of human
contact with AC current are
well known; low voltage DC
control power eliminates
hazards for personnel while
working on control systems.
From a global perspective,
one DC voltage bypasses
the need to transform the
variety of AC input voltages
used worldwide. Again,
improving safety conditions
and reducing system costs.
The S752, S801 and S811
use a 24V DC pulse width
modulated coil control for
the bypass contactor that
results in minimum power,
only 5.0W steady state. 24V
DC control reduces the risk
of injury and damage from
electrical shock and short
circuit faults. The PWM coils
in combination with an
efficient IT. Power Supply,
work to reduce or eliminate
the negative effects of
electrical system
disturbances, brown-outs
and protect against power
loss. Also, the removable
and lockable control terminal
block eliminates control wiring
errors when replacing a
device, providing yet
another level of safety.
Nothing is more costly than
system downtime – why not
choose an IT. Soft Starter
and be confident in the
safety and integrity of your
control system?
The perfect fit
The small size of IT. Soft
Starters make them the
perfect option for existing
soft starting or retrofitting
applications. At sizes that
are 55-91% smaller than
leading competitors’ soft
starters of the same ratings,
IT. is the answer.
The S752, S801 and S811
combine the overload and
bypass contactor into one
device for fast and easy
installation. Functions
traditionally provided by
multiple devices are now
offered in one compact
package. With their small
size, they can easily fit in
place of existing soft
starters, star-delta starters
or direct-on-line IEC
starters. This feature allows
easy upgrades to existing
systems.
Often an application may
call for variable motor
speed, requiring the use of
a drive. In critical
applications, a direct-on-line
starter may be used as a
bypass in the event that the
drive fails. The small
footprint of the IT. Soft
Starter enables it to fit in
the enclosure with the
drive, filling the role of the
bypass while your system
reaps the benefits of
reduced voltage starting.
Maintaining your integrity
What better way to protect
your system’s integrity than
by improving the ridethrough capability of your
control products?
Nothing is more costly than
system downtime – why not
choose an IT. Soft Starter
with the appropriately
matched Eaton 24V DC
power supply and be
confident in the integrity of
your control system?
Integral run bypass and overload protection.
A small but complete package.
IT. S752 Soft Starter
The IT. S752 is very compact,
multi-functional, easy to
install and easy to program.
The device is available in
configurations to be applied
either in the line of the motor,
or in the delta windings of
the motor. The in-line device
is available for current ranges
from 0.25 to 50 amps. The
With its integral solid-state
overload protection and run
bypass contactor, the IT.
S752 eliminates the need to
purchase additional devices
– reducing component,
wiring, panel and enclosure
costs. The S752 is available
as a component for panel
mounting.
inside-the-delta device is
available for current ranges
from 0.44 to 86 amps.
IT. S752
Control functions
Initial torque control 0–95%
Soft start 0.5–30 seconds
Soft stop 0–30 seconds
Electrical ratings (standard duty ratings)
Operating voltage (Ue) 200–600 V AC
In-line current capacity 50A
Inside-the-delta current capacity 78A
Control steady state current 200mA
Inrush current (during bypass) 3.63A @ 50mS
Max in-line power @ 440V AC – 30kW
Max inside-the-delta power @ 440V AC – 45kW
Operating frequency 47–63 Hz
Environmental ratings
Operating temperature -35 to 40°C
Storage temperature -40 to 80°C
Altitude 2000m
Humidity 95% Non-condensin\g
Vibration IEC 68–2–6 3g 10–150 Hz
Standards and Certifications
IEC 60947-4-2 UL Listed (NMFT)
EN 60947-4-2 CSA Certified (321106)
CE Marked CSA Elevator Duty (241103)
Key features
Advanced selectable protective
•
features safeguard the motor and
system against a variety of
system faults.
• Run bypass mode greatly reduces
internal heating created by the
power dissipation across the
SCRs. The bypass contactor
directly connects the motor to the
line and improves system efficiency by
reducing internal power losses. Less heat minimises
enclosure size and cooling requirements and maximises
the life of all devices in the enclosure.
• Internal run bypass contactor and overload protection
eliminate the need for additional devices, thereby
reducing enclosure sizes, minimising installation and
wiring time and reducing overall assembly size and cost.
• Wide range of overload FLA settings (31 – 100% of rated
current) and selectable trip class (10, 20, 30) offers users
the flexibility to fine tune the starter to match specific
application requirements.
• 24V DC control module enhances personnel and
equipment safety.
• Communications enabled with the addition of a SNAP
(Starter Network Adapter Product).
Initial torque control, soft start and soft stop
Soft Start
Ramp Up time
0.5 to 30 sec.
Soft Stop
Ramp Down time
0 to 30 sec.
Initial Torque
0 to 95%
Motor Voltage
Time
S752 Control
Function Diagram
Control, monitor, protect.
The S801 and the communicating IT. S811 Soft Starter
Eaton’s IT. S801 revolutionised
the reduced voltage motor
control marketplace with its
advanced feature set and
small size. The S811 offers
all the popular features as
the S801, but adds enhanced
functionality with the new
IT. S801/S811
Control functions
Voltage ramp start
Initial torque control 0–85%
Soft start 0.5–180 seconds
Current limit start
Maximum current 0–85%
Soft start 0.5–180 seconds
Kick-start 0–85%, 0–2 sec
Soft stop 0–60 seconds
Electrical ratings
Operating voltage (Ue) 200–600 V AC
Max current capacity 1000A
Steady state current 1.0A N–T Frames
Inrush current Amps 10
Operating frequency 47–63Hz
Environmental ratings
Operating temperature -30 to 40°C
Storage temperature -50 to 70°C
Altitude 2000m
Humidity 95% Non-condensing
Standards and Certifications
IEC 60947-4-2 cULus Listed (File # E202571)
EN 60947-4-2 UL Listed (NMFT)–Frame N37 to V85
CE Marked CSA Elevator (2411 01)
CSA Certification
DIM (Digital Interface Module)
and communications
capabilities. Designed to
control the acceleration and
deceleration of 3-phase
motors up to 690V, the S811
is available from 11 amps
through 1,000 amps.
690V option T–V Frames
1.4A V–Frame
Key features S801/S811
Internal run bypass contactors and overload protection
•
eliminate the need for additional devices, thereby
reducing enclosure sizes, minimising installation and
wiring time and reducing overall assembly size and cost.
• Kick-start feature enables soft starting of high friction loads.
• Pump control option with sophisticated pump algorithms
on both starting and stopping that minimize the pressure
surges that cause water hammer. The pump control
option will maximise the life of the pump and piping
systems while minimising the downtime caused by
system failure.
Key features S811
•
The DIM (Digital Interface Module) on the S811 provides
an intuitive, easy to use human interface with powerful
configuration tools to maximise system performance.
• Door or device mounted, the DIM enables users to safely
configure, commission, monitor and troubleshoot the
system at the electrical panel without opening the
enclosure door.
• System operating parameters can be monitored
enterprise-wide through a communications network.
Increase process uptime by providing data for process
management and preventive diagnostics.
• Built-in communications capabilities through Eaton QC
(Quick Connect) Port. The QCPort allows the soft starter
to be connected to a variety of networks, including
DeviceNet, EtherNet/Modbus and Profibus. The S811
communication parameters can be configured with the
DIM or through the network using CH Studio.
S811 monitoring capabilities
Phase currents
Average current
Current as a % of FLA
Thermal memory
Phase voltage
Average voltage
Control voltage
Device temperature
Start count
Breaker status
Fault queue
S811 protective features
Electronic motor overload
Short circuit coordination with Eaton
circuit breakers or with fuses
Jam
Stall
SCR over temperature
Phase loss
Phase imbalance
Automatic or manual reset
Phase reversal
Shorted SCR detection
Open SCR detection
Under current
Under voltage
Over voltage
Diagnostics fault queue
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