ASTEK-02 is an electronic switching over device implementing control over three phase asynchronous motor with square cage rotor. This device combines functions for soft starter and braking, protection of mechanisms and motors and provides communication with automation systems.
ASTEK-02 is aimed for reduction of startup currents, decreasing of overheating chances, enhancement of electric motor service life, avoiding jumps in the mechanical part of the actuator and preventing water hammer effect in pipelines ad valves during startup and shutdown of electric drives.
ASTEK-02 is used for control over units for general industrial and specific purposes:
pumps, fans and compressors,
transporters and conveyors,
heavy load and inertia devices,
grinding, metal and wood working machines,
machines and devices with belt, chain and other types of transmission, geared motors,
valves and fittings
Soft starter performs the following functions:
Smooth start and shutdown ASTEK-02 provides smooth start and shutdown which can be adjusted timewise due to linear change of voltage at the electric motor. Initial level of voltage for start is adjustable. When the time for soft start is over, full voltage from the network is supplied to the motor. When the time for soft shutdown is over, the motor is fully cut off from power supply.
Braking mode ASTEK-02 provides braking which can be adjusted timewise due to induction-dynamic commutation mode of voltage at the motor. When the time for braking is over, the motor is fully cut off from power supply.
Current adjustment ASTEK-02-02 provides adjustment (limiting) of preset level of motor current. Current level is monitored at all modes of electric motor operation: startup, movement, shutdown or braking. When the current level is exceeded ASTEK-02 reduces the voltage supplied to electric motor.
Interfacing with remote control ASTEK provides data exchange with PCS through RS-485 interface with Modbus RTU exchange protocol. Through this interface the complete diagnostic for ASTEK-02 state is done as well as commands sending. Additionally to the interface connection of digital control signals is provided, such as Open, Close, Stop, terminal switches KVO, KVZ, motor temperature sensor DT and digital outputs of Movement and Emergency. Setup of digital control is done for impulse or potential operation mode.
Rated supply voltage, V
380, 3 phases
Capacity of the asynchronous electric motor to be connected, kW
up to 7.5
Number of digital inputs/outputs
Interfacing with remote control
RS-485, Modbus RTU protocol
Exchange rate through interface, bits per sec
up to 57600
Voltage of digital control inputs, V
Voltage of digital alarm outputs
24В DC/220В AC, output type - dry contact
from -40 to +50
S1, S2, S3, S4
Main types of implemented protection:
from phase loss
from overheating of motor and converter
from lingering startup
from shaft load loss (can be disabled)
from overrunning allowable frequency start
from wrong phase consequence with automatic connection correction
time-current and maximum current protection of motor