GE Industrial Solutions ASTAT-CD Plus - Manual (Page 6)

1-2. Features and benefits
An increase in productivity and reliability with the use of
static soft starters.
The ability to start and stop the motor without steps or transitions lengthens the
life of power-driven machines’ mechanical parts, and it reduces stress on
transmission belts and coupling parts. Consequently, maintenance time is
reduced and machine/facility lifespans are lengthened.
Improvement in acceleration / deceleration characteristics
By starting with the voltage ramp or, alternatively, by starting current limitation,
the acceleration and deceleration ramp more closely fits the load characteristics.
A kick start also may be selected in instances of high static friction load.
Protected motor
The ASTAT-CD Plus protects the motor from overloads and from incorrect
operating conditions such as loss of an input or output phase, stalled rotor,
thyristor short circuit, etc.
Digital technology
The control system is based upon the use of a highly specialized microcontroller
that treats the signals digitally, thereby avoiding deratings and adjustments
common to analog circuits. This type of control ensures excellent precision and
speed of execution. The control board uses surface-mounted devices (SMD) to
increase equipment reliability.
1. Overview
1-2
High level of immunity
The control signals are optoelectronically isolated. Various levels of protection
have been set up in the circuits to immunize the equipment against external
disturbances and their harmful effects.
Easy to run and adjust
The ASTAT-CD Plus can be used for a wide range of applications. A keypad and
digital display make it easy to select options that allow the equipment capabilities
to be customized to application needs.
Easy maintenance due to full monitoring
Advanced microprocessor technology allows starters to identify 21 different
types of fault conditions. The last four errors are retained in memory to facilitate
troubleshooting and minimize downtime.
Pump control
The ASTAT-CD Plus includes a pump control function that is more effective in
fluid systems than standard soft starting and stopping. The control reduces fluid
surges and hammering in a pipeline system. This method controls the motor
speed by monitoring the motor parameters with voltage control in a closed-loop
system.
Advanced functions
The ASTAT-CD Plus includes advanced functions, such as, linear acceleration
ramp, programmable I/O, and connection to a computer by serial communication
(RS 232).