PSR3 Datasheet, PDF (3/7 Pages) List of Unclassifed Manufacturers – Softstarters

Softstarters
From the moment the first electric motor was developed,
engineers have tried to come up with ways of avoiding
the electrical and mechanical problems that usually occur
when starting a motor. High inrush currents, current spikes
and excessive mechanical wear are some of the problems
that need to be avoided. One way is to use a Star-Delta
starter. This method is for many applications an insufficient
solution since it handles neither problems with current
spikes or torque peaks nor provides a way to perform a
soft stop. A softstarter on the other hand, will provide far
better performance during the start and allows for soft
stops of the motor.
all over the world, causing problems in several ways:
• Electrical problems due to voltage and current transients
arising from Direct-On-Line or Star-Delta starts. The
transients may overload the local supply network and
cause unacceptable voltage variations that interfere with
other electrical equipment connected to the network.
• Mechanical problems that address the entire drive chain,
from motor to driven equipment, causing a big need for
service and repair work.
• Operational problems, such as damage to products on
conveyor belts.
ABB has been producing softstarters since the beginning of
the 1980’s. Over 30 years’ experience has been incorporated
into the design of today’s product ranges. Modern power
electronics matched with smart circuitry and software gives
users of ABB‘s softstarters, with several state-of-the-art design
features, superior control of current and voltage levels during
motor start and stop.
The solution to both mechanical and electrical problems
AC motors, “the workhorses of the industry”, are used to
drive fans, crushers, agitators, pumps, conveyors and more.
Depending on the motor installation, torque and current peaks
occur. These peaks are everyday reality for production plants
• Water hammering and pressure surges in pipe systems
when starting and stopping pumps.
The financial consequences of the problems above are
considerable. Every technical problem and every breakdown
costs money in repairs and lost production.
By choosing ABB’s softstarter, all of these problems could
be avoided. Whether the choice is the PSR, PSS, PSE or the
PST(B), ABB’s softstarters all allow smooth start and stops
while keeping mechanical and electrical stresses to a minimum.
Motor voltage
V
100 %
DOL
Star/Delta
Softstart
58 %
70 %
30 %
Adjustable
ramp slope
Motor current
I
DOL
Star/Delta
Softstart
Torque
T
DOL
Star/Delta
Softstart
Time
Motor speed
Motor speed
Graphs showing the basic differences between Direct-On-Line starting (DOL), Star-Delta starting and soft starting in terms of the motor voltage (V), motor current (I) and motor torque (T).
Softstarters
ABB‘s softstarters – The complete range
ABB offers four different ranges of softstarters to cover
every customer need for solutions with motor sizes up to
1800 A. This page describes the main characteristics of the
different softstarter ranges.
PSR — The compact range
The PSR softstarter is the most compact of all the softstarter
ranges. A compact softstarter also allows for the design of
compact starting equipment. A PSR together with a MMS
(manual motor starter) makes up a far more compact starting
solution than a Star-Delta starter, for instance.
By including a built-in by-pass the energy losses inside the
softstarter are reduced. And with only three potentiometers,
the setup of the PSR could not be easier. Still, the optimized
ramping characteristics will ensure a very smooth start and
stop for all applications.
PSS — The flexible range
The PSS is the most flexible of the four softstarter ranges from
ABB. It allows both in-line and inside delta connections. As
with the PSR, few settings are needed to get it up and running.
Connecting an external current transformer makes it possible
to activate the current limit function which will allow you to
keep the current at a pre-set level also when starting heavy-
duty applications. The PSS softstarter is the ideal solution
when looking for a robust solid state starting solution where
handling many starts per hour is required.
PSE — The efficient range
The PSE softstarter is the world’s first compact softstarter
with both built-in electronic overload for motor protection
and torque control for excellent control of pumps. A compact
design, packed with functionality, makes the PSE a very
efficient starting solution.
An illuminated, language neutral display and a four button
keypad makes it easy to take advantage of all the advanced
features of the PSE softstarter. The display provides all the
necessary information both during ramping and continuous
operation.
PSR18 - 600 - 70
Control supply voltage: 70 = 100-250 V AC
11 = 24 V AC/DC
Operational voltage: 600 V
Current rating: 18 A
Softstarter range
PST(B) — The advanced range
The PST(B) softstarter is the most advanced softstarter in
the range with almost all imaginable functionality included.
Advanced protection of the motor, softstarter and load ensures
a trouble-free operation. Problems are detected before the
motor needs to be stopped thanks to a pre-warning system
that minimizes downtime.
The torque control of the PST(B) was developed in cooperation
with well-known pump manufacturers to ensure the best
possible stop of pumps, without the risk of water hammering
and pressure surges.
With the full-text LCD display in your own language, pre-
programmed application settings and event logging, setup and
operation could not be easier.
By using the ABB‘s FieldBusPlug, you can decide at any time
which bus protocol to use. The fieldbus system will allow you
to setup, control and monitor the softstarter.
PSR PSS PSE PST(B) • Standard O Optional – Not available
•
–
•
• 1) Built-in by-pass 1) on PSTB
–
•
–
• Inside delta connection
–
–
•
O Coated PCBs
–
–
•
• Display and keypad
–
–
•
• Torque control
–
O
•
• Settable current limit function
–
–
•
• Electronic motor overload protection
–
–
–
• PTC input for motor protection
–
–
–
• Phase imbalance protection
–
–
–
•
Phase reversal protection
–
–
•
•
Locked rotor protection
–
•
•
•
Thyristor overtemperature protection
–
–
•
•
Underload protection
–
–
–
•
Programmable warning functions
–
–
•
•
Analog output
O
–
O
•
FieldBus communication
–
–
O
•
Event log
–
–
O
O External keypad
4 Softstarters | 1SFC132005C0201, rev. M
1SFC132005C0201, rev. M | Softstarters 5