3RW3014-1BB14 SIEMENS, 3RW3014-1BB14 Datasheet - Page 29

• Manufacturer Part Number: 3RW3014-1BB14
• Description: SIRIUS SOFTSTARTER, S00, 6.5A, 3KW/400V
• Manufacturer: SIEMENS

Specifications of 3RW3014-1BB14

• Supply Voltage Range: 200Vac To 480Vac
• No. Of Phases: Three
• Power Rating: 3kW
• Current Rating: 6.5A
• Operating Temperature Range: -25°C To +60°C
• Approval Bodies: CE, IEC, UL, CSA
• Control Voltage: RoHS Compliant

Function
The space required by the compact SIRIUS 3RW40 soft starter
is often only about one third of that required by a wye-delta
assembly of comparable rating. This not only saves space in the
control cabinet and on the standard mounting rail but also does
away completely with the wiring work needed for wye-delta
starters. This is notable in particular for higher motor ratings
which are only rarely available as fully wired solutions.
At the same time the number of cables from the starter to the
motor is reduced from six to three. Compact dimensions, short
start-up times, easy wiring and fast commissioning make
themselves felt as clear-cut cost advantages.
The bypass contacts of these soft starters are protected during
operation by an integrated solid-state arc quenching system.
This prevents damage to the bypass contacts in the event of a
fault, e.g. brief disconnection of the control voltage, mechanical
shocks or life-related component defects on the coil operating
mechanism or main contact spring.
The starting current of particularly powerful operating
mechanisms can place an unjustifiable load on the local supply
system. Soft starters reduce this starting current by means of their
voltage ramp. Thanks to the adjustable current limiting, the
SIRIUS 3RW40 soft starter takes even more pressure off the
supply system. It leaves the set start ramp during the ramp-up –
the ramp gradient is fixed by the starting voltage and the ramp
time – as soon as the selected current limit is reached. From this
moment the voltage of the soft starter is controlled so that the
current supplied to the motor remains constant. This process is
ended either by completion of the motor ramp-up or by tripping
by the intrinsic device protection or the motor overload protection.
As the result of this function the actual motor ramp-up can well
take longer than the ramp time selected on the soft starter.
Thanks to the integrated motor overload protection according to
IEC 60947-4-2 there is no need of an additional overload relay
on the new soft starters. The rated motor current, the setting of
the overload tripping time (Class times) and the reset of the
motor overload protection function can be adjusted easily and
quickly. Using a 4-step rotary potentiometer it is possible to set
different overload tripping times on the soft starter. In addition to
Class 10, 15 and 20 it is also possible to switch off the motor
overload protection if a different motor management control
device is to be used for this function, e.g. with connection to
PROFIBUS.
Device versions with thermistor motor protection evaluation are
available up to a rating of 55 kW (at 400 V). A "Thermoclick"
measuring probe can be connected directly, as can a PTC of
type A. Thermal overloading of the motor, open-circuits and
short-circuits in the sensor circuit all result in the direct
disconnection of the soft starter. And if ever the soft starter trips,
various reset options are available the same as with intrinsic
device protection and motor load protection: manually with the
reset button, automatically or remotely through brief disconnection
of the control voltage.
The new series of devices comes with the "polarity balancing"
control method, which is designed to prevent direct current
components in two-phase controlled soft starters. On two-phase
controlled soft starters the current resulting from superimposition
of the two controlled phases flows in the uncontrolled phase.
This results for physical reasons in an asymmetric distribution of
the three phase currents during the motor ramp-up. This
phenomenon cannot be influenced, but in most applications it is
non-critical.
© Siemens AG 2008
Controlling the power semiconductors results not only in this
asymmetry, however, but also in the previously mentioned direct
current components which can cause severe noise generation
on the motor at starting voltages of less than 50 %.
The control method used for these soft starters eliminates these
direct current components during the ramp-up phase and
prevents the braking torque which they can cause. It creates a
motor ramp-up that is uniform in speed, torque and current rise,
thus permitting a particularly gentle, two-phase starting of the
motors. At the same time the acoustic quality of the starting
operation comes close to the quality of a three-phase controlled
soft starter. This is made possible by the on-going dynamic
harmonizing and balancing of current half-waves of different
polarity during the motor ramp-up. Hence the name "polarity
balancing".
As an option the thyristors can also be protected by SITOR
semiconductor fuses from short-circuiting so that the soft starter
is still functional after a short-circuit (coordination type 2). Three
LEDs are used to indicate the operating state as well as possible
errors, e.g. non-permissible tripping time (CLASS setting),
mains or phase failure, missing load, thermal overloading or
device faults.
• Soft starting with voltage ramp; the starting voltage setting
• Smooth ramp-down with voltage ramp; the running down time
• Solid-state motor overload and intrinsic device protection
• Optional thermistor motor protection (up to size S3)
• Remote reset (integrated up to size S3, optional for size S6 and
• Adjustable current limiting
• Integrated bypass contact system to minimize power loss
• Setting with potentiometers
• Simple mounting and start-up
• Integrated status monitoring and fault monitoring
• Mains voltages 50/60 Hz, 200 ... 600 V
• Various control voltage versions
• Wide temperature range from -25 to +60 °C
• Built-in auxiliary contacts ensure user-friendly control and
range U
0 to 20 s.
t
larger)
- sizes S0 to S3:
- sizes S6 to S12:
possible further processing within the system
graphs see page 6/36)
off
24 V AC/DC and
110 ... 230 V AC/DC
115 V AC and 230 V AC. Control by way of the internal
24 V DC supply and direct control by means of PLC are
possible.
can be set between 0 s to 20 s.
s
Siemens LV 1 N SIRIUS Soft Starters · 01/2008
is 40 to 100 % and the ramp time t
3RW Soft Starters
for standard applications
R
can be set from
(for status
3RW40
6/23