LV-AS Soft StarterProduct Introduction and Familiarisation

Overview

• 18 A ~ 200 A (7.5 ~ 110 kW @400 VAC)

• Soft start/stop + essential motor and

system protection

• Compact and cost-effective

• Easy to configure

Current Ratings

• Current rating

– 18 A ~ 200 A

– 7.5 ~ 220 kW @ 400 VAC

AC53b 4.0-6:354

AC53b 4.0-6:594

0018A

0034A

0042A

0048A

0060A

0075A

0085A

0100A

0140A

0170A

0200A

Models

Supply Voltage Options

Maximum Voltage Rating

• Mains voltage:

V4 = 200~440 VAC

V6 = 200~575 VAC

LV-DS-140-V4-C1

All LV-AS models are available

in two control voltage

configurations.

LV-AS -140-V4-C1

Control Supply Voltage

C1 = 110-240 VAC or 380-440 VAC

C2 = 24 VAC / VDC (eg PLC control)

Control Voltage Options

Standard Approvals

• CE: IEC 60947-4-2

• C Tick

• RoHS: Compliant with EU Directive

2002/95/ECCCC

Environmental

• IP20: - 18 ~ 100 A

- 140 ~ 200 A (when installed

with optional finger guards)

• IP00:

- 140 ~ 200 A

FEATURES AND BENEFITS

Key Selling Points

• Easy and economic to install

• Soft start/stop plus motor/system

protection

• Fast and easy to configure

Economic to Install

• Compact design minimises panel space

• Integrated bypass

• Relay outputs to assist system integration

Motor Control and Protection

• Offers the most popular soft start and soft

stop methods.

• Essential motor and system protection –

no need for dedicated protection

equipment, no need to pay for

unnecessary features.

Balanced Vector Control

• The affordability of two phase control, with

operating characteristics closer to

three phase control.

K1M

4/T2

1/L1

3/L2

5/L3

2/T1

6/T3

3 PHASE

SUPPLY TO MOTOR

Interface

• Easy to use setting dials

• Status feedback

• Trip codes

ECONOMIC TO INSTALL

Compact Physical Design

• Small footprint to minimise panel space requirement.

• Din Rail Mount up to 60A

Three frame sizes in total 18~60A 75~100A 140~200A

Built-in Bypass

• Built-in bypass (≤200 A) reduces heat

dissipation, eliminating costs of external

fans or bypass contactors.

Relay Outputs

• Fixed Output Relay (13-14)

– designed to control a line contactor

– relay is closed while the soft starter is starting,

running or stopping the motor

Relay Outputs

• Programmable Output Relay (23-24)

• Is designed to provide a N/O contact which reports the soft starter

status , it can be configured to indicate a trip or run (operating in

bypass) .

• Trip Output

– operates when the soft starter trips

– use to operate a shunt trip of an upstream Circuit Breaker or

signal the trip status to an automation system

• Run Output

– operates on completion of the start ramp

– use to operate a contactor for power factor correction capacitors

or signal the run status to an automation system

Electrical Schematic

Soft starter

installed with a

system protection

circuit breaker

complete with a

shunt trip device

Installation

USER-FRIENDLY INTERFACE

Simple Interface

Ready Run

Off No control power Motor not running

On Ready Motor running at full

speed

Flash Tripped Motor starting or

stopping

Simple Interface

• Easy access to configuration

dials on front of unit.

• Fast and easy to configure –

8 settings

• Status feedback LEDs

Adjustments

• Eight adjustments can be made on the LV-AS soft starters:

– Current Limit

– Current Ramp

– Stop Ramp Time

– Motor FLC

– Motor Trip Class

– Excess Start Time

– Phase Sequence Protection

– Auxiliary Relay Function

LV-AS Setup

• Motor FLC –

– All motor protections are based on this

setting.

– The minimum “Motor FLC” setting is 50%

of the LV-AS nameplate rating. Range

50-100%

Example – LV-AS-018 18A

If the motor FLC on the motor nameplate = 15A

The motor FLC (% soft starter FLC) = Motor

FLC ÷ LV-AS FLC

15A FLC ÷ 18A LV-AS FLC = .83 or 83%

setting

Constant Current

• Ideal where start current must be kept

below a particular level.

• Current is passed at the selected level

until the motor has accelerated.

Initial current

Current limit

Full voltage current

1

2

3

• Current Limit – (%FLC) Factory setting

350%. It provides the maximum start current

from 250 – 475% FLC covering all types of

general applications.

• 60% of motor applications are for centrifugal

pumps.

• These have quadratic load characteristics

measured as TN2 (torque is proportional to

speed squared)

LV-AS Setup

Current Ramp• Current rises from a specified starting level to a

maximum limit, over an extended period of time.

• Useful for applications where:

– the load can vary between starts

– the load breaks away easily, but starting time

needs to be extended

– the electricity supply is limited (eg generator

sets)

Current Ramp

4

Initial current

Start ramp time

Current limit

Full voltage current

1

2

3

• Current Ramp – (% FLC/Ramp Time)

Factory setting = Off

• The LV-AS offers current ramp soft starting.

During a current ramp soft start , the LV-AS

raises the current to an initial level, then

increases the current to the current limit , over a

user defined period (up to 15 seconds)

LV-AS Setup

Stop Methods

• Soft starters help eliminate the damaging

effects of fluid hammer.

Stop Method Performance Effect

Coast to stop Natural load run down

Timed voltage ramp Extended run down time

Timed Voltage Ramp

• Reduces voltage to the motor gradually over a

defined time.

• Load may continue to run after the stop ramp is

complete.

• Useful for applications where the stop time

needs to be extended, or to avoid transients on

generator set supplies.

Timed Voltage Ramp

Stop time1

• Soft Stop – Factory setting – No soft stop

• The LV-AS offers a timed voltage ramp soft stop.

The soft starter reduces its output voltage over a

specified period (0 to 20 Seconds) , adding

inertia to the load and allowing the motor to slow

down gradually

• Coast to Stop

• A setting of 0 seconds removes voltage

immediately allowing the motor to coast to

stop

LV-AS Setup

• Motor Trip Class – Class 10 general setting

• Excess Start Time – Factory setting = 10

( used in case the motor stalls or a characteristic

has changed)

• Added backup – even when the excess start time

is set to off it automatically defaults to 120 seconds

• Phase Sequence/Aux Relay Set

• (Example Can tell a PLC if the LV-AS trips)

• Any rotary switch settings adjusted during run

will only take effect on the next start.

LV-AS Setup

ESSENTIAL PROTECTION

Diagnostic Trip Codes• X1 Power Circuit Fault –Check mains supply – shorted SCRs

• X2 Excess Start Time – Check load, increase current limit or adjust setting

• X3 Motor Overload – Allow motor to cool, reset & restart. 105%

• X4 Motor Thermistor – Check motor ventilation and connection B4&B5.

• X5 Phase Imbalance- Check line current L1,L2 & L3

• X6 Supply Frequency –Trip points <40Hz and >72Hz , loss of 3 phases

• X7 Phase Sequence – check phase rotation & rotary pot setting

• X8 Communication Failure – Network – between interface and network

• X9 Communication Failure – Starter – between starter and interface

• X10 Bypass Relay Overload – Check application during run

Motor/Starter Protections

• Motor Overload (thermal model)

• Excess Start Time

• Bypass Relay Overload

- bypass relay temperature

- 600% FLC

• Motor Thermistor (built-in thermistor input)

System Protections

• Power Circuit Fault (mains supply, motor circuit,

starter SCRs)

• Phase Imbalance

• Supply Frequency (<40Hz and >72Hz)

• Phase Sequence

• Communication Failure (between

communication module and starter or network)

OPTIONS

Communication Options

• Plug-in communication modules:

– USB

– Modbus

– DeviceNet

– Profibus

– ModbusTCP

– EthernetIP

– Profinet

Remote Operator

• Operational control (start, stop, reset)

• Operating feedback (status, current and

temperature)

• Maximum cable distance 100 m

Software Tools

• WinStart

– Sales Engineer software

(not for end users)

– Selects the right starter for

the application

• WinMaster

– Control, monitor and

program starters remotely

BALANCED VECTOR

CONTROL

Balanced

Vector Control

Typical two phase waveforms Three phase

starting waveform

Balanced Vector Control

• Two phase control with the waveform

symmetry of three phase control.

• A superior control algorithm that minimises

the imbalance between the controlled and

uncontrolled phases.

• Balanced vector control gives:

– more uniform motor acceleration torque

– more evenly balanced phase currents

– lower noise & vibrations

Balanced Vector Control

• Compared with other two phase starters:

– More starts per hour

– Heavier duty loads

– Larger motors

Balanced Vector Control