Increase in productivity and reliability with the use of
static soft starters.
1-2. Advantages of the ASTAT Plus Solid State Soft starter
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Starting and stopping the motor without steps or transitions lengthens the life of
power-driven machine mechanical elements, greatly reducing stress on trans-
mission and coupling parts.
Consequently, overhauling times are reduced and machine and facility lifespans
are lengthened.
1. Generalities
1-2
Improvement in acceleration / deceleration
characteristics
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Being able to start by using the voltage ramp or alternatively by limiting current lets
acceleration fit the load characteristics. Application of a pulse start may also be
selected in cases of high static friction load.
Braking may be made by cutting-off power or by stop ramp, and it is also possible
to brake more energetically by feeding a DC current to the motor stator, so there
are many ways to obtain the best possible deceleration.
This unit can be used for a wide range of applications.
Adjustments are very easy to make and diverse options may be selected to have
equipment capabilities suited to application needs every time.
Easy to run and adjust
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The signalling code based on alphanumeric display, makes the equipment
working conditions known at any time and gives a quick diagnosis when
protection security is violated.
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Easy maintanence due to full monitoring
The ASTAT Plus includes advanced functions, like linear acceleration ramp,
forward and reverse jog, programmable I/O or connection to a computer by serial
communication (RS 232), all included as standard.
These performances allows the incorporation of the soft starter to a distributed
control net, in automated plant processes, together with other soft starters,
programmable controllers, variable speed drives, etc.
Pump control
The ASTAT Plus includes a Pump Control function which is more effective than
the standard soft stop, reducing fluid surges or hammering in a pipe line system.
This method reduces the motor speed, by controlling internal parameters in the
motor as well as the output voltage in a close-loop system.
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The soft starter protects the motor from overloads as well as from incorrect
operating conditions such as loss of an input or output phase, blocked rotor,
thyristor short circuit, etc.
Protected motor
3
Digital technology
4
The control system is based on the use of a highly specialized microcontroller by
which signals are treated digitally, thereby avoiding deratings and adjustments
common to analogue circuits and obtaining excellent precision and speed of
execution.
The control board is made with the technology of surface mounting devices
(SMD), which increases equipment reliability.
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High level of immunity
Design of the unit was closely tied to the conditions of supply lines, which handle
more disturbance every day. The control signals are optoelectronically isolated
and various levels of protection have been set up in the circuits to immunize the
equipment against external disturbance and its effects.
Advanced functions
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