CD Automation STE Series Manual de usuario

USER’S MANUAL

Rev. 01/2007 ST

Enhanced Soft Starter

CONTENTS

1 Important warnings for safety..................................................................................... 5

2 Overview ..................................................................................................................... 6

2.1 Option CONTROL 6

2.2 Overall Features 7

2.3 Basic Connections 8

3 Quick Start .................................................................................................................. 9

4 Setting the Starter..................................................................................................... 10

4.1 Delivery of the SOFT START 10

4.2 Factory Setting 11

4.3 Mounting 12

4.4 Dimensions and Fixing holes 13

4.5 Size Family 14

4.6 Select Fuses 15

4.7 Removing the cover 16

5 How to connect the starter ........................................................................................ 17

5.1 Wiring details 17

5.2 Continuous service (no Bypass) Power Connections 18

5.3 Bypass Power Connections 19

5.4 Diagram of connection for Size 9 without Bypass 20

5.5 Diagram of connection for Size 9 with Bypass 22

5.6 Diagram of connection for Size 11/13/14 without Bypass 24

5.7 Diagram of connection for Size 11/13/14 with Bypass 26

6 Connection description .............................................................................................. 28

6.1 Access to the Electronic boards 28

6.2 Supply the Electronic Board 28

6.3 Analog Inputs 29

6.4 Analog Outputs 31

6.5 Digital Input 32

6.6 Digital Output 33

7 Led status and Alarms ............................................................................................... 34

7.1 LED Status Table 34

7.2 Critical Alarms 35

7.3 Not Critical Alarm 37

8 Control Panel ............................................................................................................. 38

9 Configuration Parameters.......................................................................................... 40

9.1 Operator Menu 40

9.2 Hardware Menu 42

9.3 Setup Menu 44

10 Typical Applications................................................................................................. 47

10.1 Example of starting curves in Voltage Ramp 48

10.2 Example of starting curves in Current Ramp 48

11 Maintenance ............................................................................................................ 49

11.1 Cooling Fans 49

11.2 Maintenance 49

11.3 Repairing procedure 49

11.4 Warranty condition 49

12 RS485 Serial Port .................................................................................................... 50

12.1 MODBUS communication 51

12.2 MODBUS RTU Protocol 51

12.3 Message Format 51

12.4 Read Holding Registers 53

12.5 Preset Multiple Registers 53

12.6 Error and exception responses 54

12.7 Address Configuration 54

CD Automation srl STE Soft Starter User’s Manual

1Important warnings for safety

Before any operation on either the mechanical or electrical parts of the installation, check that power

and control cables of the unit are isolated from voltage sources.

During operation the motor can be stopped by cancelling the run command but the starter remaind

powered up.

If personnel safety requires prevention of sudden restarts, this electronic locking system is not

sufficient: fit a breaker on the power circuit.

The starter is fitted with safety devices which, in the event of a fault, can stop the starter and

consequently the motor.

The motor itself may be stopped by a mechanical blockage. Finally, voltage variations or line supply

failures can also cause shutdowns.

If the cause of the shutdown disappears, there is a risk of restarting which may endanger machines,

installation or personnel. In this case the user must take precautions against the possibility of restarts,

example cut off the power.

This starter must be installed and set up in accordance with both international and national standards.

Bringing the device into conformity is the responsibility of the systems integrator who must observe the

EMC directive among others within the European Union. The specifications contained in this document

must be applied in order to comply with the essential requirements of the EMC directive.

The STE Soft Starter must be considered as a component: it is neither a machine nor a device ready for

use in accordance with European directives (machinery directive and electromagnetic compatibility

directive). It is the responsibility of the final integrator to guarantee conformity to the relevant

standards.

Note

Warning: This icon is present in all the operational procedures where the Improper

operation may result in serious personal injury or death

Caution: This icon is present in all the operational procedures where the Improper

operation can cause damage for the SOFT STARTER.

CD Automation reserves the right to modify the own products and this manual without any

advise.

CD Automation srl STE Soft Starter User’s Manual

2Overview

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.

CD Automation srl STE Soft Starter User’s Manual

2.2 Overall Features

Starting the motor by different methods:

•Voltage ramp from INTITIAL VOLTAGE to RATED VOLTAGE (or nominal torque) with current limit.

•Current ramp.

•Kickstart (or voltage pulse) of 80 % UN without current limit intended for start high friction load

requiring high starting torque for a short time.

Deceleration the motor by different methods:

•Voltage ramp.

•Free wheel by shut down of contactor.

CD Automation srl STE Soft Starter User’s Manual

2.3 Basic Connections

Star Connections (3 wires)

LSM III ==

IL= Line current

IS= Soft Starter current

IM= Motor current (Winding)

VL= Line voltage

VM= Motor voltage

Delta Connections (3 wires)

I=LS II =LM VV =

IL= Line current

IS= Soft Starter current

IM= Motor current (Winding)

VL= Line voltage

VM= Motor voltage

Open Delta Connections (6 wires)

II == LM VV =

IL= Line current

IS= Soft Starter current

IM= Motor current (Winding)

VL= Line voltage

VM= Motor voltage

CD Automation srl STE Soft Starter User’s Manual

3Quick Start

Caution: this procedure must be performed only by qualified persons.

STE start ups should be performed by electrical technicians who are familiar with electronic soft starters

and their applications. This List covers the steps necessary for a basic start up:

1. Verify the Basic Connections. Making sure that the Soft Start current is in line with what you

really need.

(see par. 2.3)

2. Verify the Factory Setting

(see par. 4.2)

3. Verify the STE Soft Starter Mounting

(see par. 4.3)

4. Verify the Diagram of connection:

•All auxiliary connections must be done in line with wirings on this manual.

•Verify that there isn’t a short circuit on the load.

(see par. 5)

5. Now you are ready for Supply the Electronic boards

(see par. 6.2)

6. If not specified in the Order Code:

•Set the Full Load Current (In) of AC motor in the parameter P017 "':.

•Set the Limit Current in the parameter P018 3' (Refer to the Typical Applications par. 10).

(see par. 8)

7. Apply Start command. If the motor doesn't begin to turn, stop the unit, increase the Initial

Voltage (parameter P022 0:-/) and start again. Caution:Values too high of Initial Voltage can

cause inrush current and mechanical shock

8. When the Motor begins to turn, if the motor speed does not accelerate to the nominal value,

increase the Current Limit. If current during acceleration is too high, increase the Acceleration

Ramp (parameter P020 +):1)

9. Apply Stop command and wait until motor stops

The STE Soft Starter is ready to use.

CD Automation srl STE Soft Starter User’s Manual

4Setting the Starter

4.1 Delivery of the SOFT START

Caution: Before to install, make sure that the SOFT START have not damages. If the

product has a fault, please contact the dealer from which you purchased the product.

The identification's label give all the information regarding the factory settings of the SOFT START unit,

this label is on the unit, like represented in figure.

Check that the starter reference printed on the label is the same as that on delivery notes corresponding

to the purchased order (see par. 4.2).

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