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STE Soft Starter
User’s Manual
6
2
Overview
The STE Soft Starter is a third generation ,highly sophisticated Soft Starter for use with standard three
phase squirrel cage induction motor. It provides the best method of reducing current during motor
starting.
The STE starts the motor by supplying a slowly increasing voltage providing soft start and smooth
acceleration, while drawing the minimum current necessary to start the motor.
The STE can have an external by-pass contactor, which can be activated at the end of starting process.
After the starting process by-pass operating, the STE control the motor operating:
•
Thermal Overload
•
Measure of Currents, frequency, power
•
Alarm and shutdown operation
Size S9
with Bypass
Size S11, S13, S14 with Bypass
The electronic control of STE is Full Digital with an high performance 16 bit embebbed microprocessor in
connection with an 4 Digit Data Entry, for display and programming parameter's application.
The RS485 Communication with MODBUS protocol enables the soft starter to perform full control and
supervision: up 127 starters can be connected on a shield twisted pair to a host computer.
2.1
Option CONTROL
At the end of starting normally the grid supply the AC motor to full Votage:
with the option CONTROL in these condition the voltage can be reduced by a signal in the terminal box
(0÷10 Vdc or 4÷20 mA).
These feature is very useful for special loads (i.e. fans type load).
On obtein the speed variation by simply / economic voltage variation,in comparison with an inverter
solution.
Summary of Contents for STE Series
Page 1: ...USER S MANUAL Rev 01 2007 STE Enhanced Soft Starter ...
Page 2: ......