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ABB Softstarter Benefits Charnchanok Thongprad. Why Softstarters?. Benefits for the Electrical network. Starting Current. Reduces voltage drops on networks Minimizes starting currents Eliminates current spikes Allows optimization of cabling. Current. Star/Delta. D.O.L. Softstart.

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Presentation Transcript
slide2

Why Softstarters?

Benefits for the Electrical network

Starting Current

  • Reduces voltage drops on networks
  • Minimizes starting currents
  • Eliminates current spikes
  • Allows optimization of cabling

Current

Star/Delta

D.O.L

Softstart

Speed

Minimized inrush current

with no transition spikes

slide5

Why Softstarters?

Mechanical benefits

Starting Torque

  • Minimizes stress on transmissionslike gearboxes, belts and bearings
  • Reduced water hammering
  • Minimizes maintenance cost
  • Reduces down-time

Torque

D.O.L

Star/Delta

Softstart

Speed

Optimized torque

What is your actual cost?

softstarter
Softstarter

Principal function:

Anti-parallel connected thyristors

Time delay

Voltage reduction during start

how softstarters work

Peak Line Voltage 680V

RMS Line Voltage480V

RMS Switched Voltage240V

Thyristor turn on delayed until this point in the sine wave.

How Softstarters Work
  • A Thyristor is a high speed one-way “switch”
    • By switching on “late” the “RMS” or average voltage to the motor is reduced
how softstarters work1
How Softstarters Work
  • By using opposing Thyristors, both sides of the sine wave can be controlled
how softstarters work2

Gate

Fire

100%

Volts

Time

How Softstarters Work
  • By advancing the “Gating” or firing point, we can ramp the voltage up (or down).
softstarter1

T  Ue2

I  Ue

T

I

Ue = 50 % => I = 50 %

rpm

rpm

Ue = 50 % => T(0,52) = 25 %

Softstarter
softstarter2

T

T

rpm

rpm

Low load

High load

Medium load

I

I

I

rpm

rpm

rpm

Softstarter
  • Optimal current and torque

T

rpm

slide16

How to select right-match Softstarter.

What you have to know before do selection?

1.Motor size

2.Applications

3.Electrical system & connection

4.Ambient temperature

5.Altitude

slide18

100 A

M

100 A

Electrical connection

Connections

IN - LINE

INSIDE DELTA

  • ABB’s Softstarters can be connected both ways
  • Down-sizing possible with inside delta
  • Easy to replace star-delta starter

100 A

100 A

58 A

58 A

M

100 A

slide22

Motor Starter Coordination

Motor starter

x

Circuit-breaker or fused isolator ( Short circuit, Lock rotor protection )

Contactor ( Motor control, Isolation)

Thermal overload relay ( Protection against overload of the motor )

M

M

Motor

slide26

T  Ue2

I  Ue

T

I

Ue = 50 % => I = 50 %

rpm

rpm

Ue = 50 % => T(0,52) = 25 %

Start / Stop parameter

Setting parameter.

1.Initial Voltage

2.Current limit

3.Start ramp

4.Stop ramp (If necessary)

5.Kick start (If necessary)

slide30

Starting current from Fluke 43B

  • 22 kW,400V
  • Starting current ; 80 A (56.5 Arms)
  • Max. st. current ; 310 A (219 Arms, 5*Ie)
  • Starting time ; 11 Sec
slide31

Starting current from Fluke 43B

  • 22 kW,400V
  • Starting current ; 80 A (56.5 Arms)
  • Max. st. current ; 240 A (170 Arms, 3.9*Ie)
  • Starting time ; 14.4 Sec
slide32

Starting current from Fluke 43B

  • 22 kW,400V
  • Starting current ; 80 A(56.5 Arms)
  • Max. st. current ; 200 A (140 Arms, 3.2*Ie)
  • Starting time ; 17.5 Sec
slide33

The Advanced range – PST30…PSTB1050

Kick start

  • Gives an extra boost in the start
  • Good when having high load torques in the first part of the start.
  • Jammed pumps can be started

Possible to set both level and duration

0,1 …1,5 Sec

U

50 … 100%

Set initial voltage Uini

Time

Normal ramp

Ramp with kick start

slide34

The Advanced range – PST30…PSTB1050

With Kick start

Without Kick start

slide36

The Advanced range – PST30…PSTB1050

Main technical data

Wide main voltage rangePST(B) xx-600 ….. 208 – 600V

PST(B) xx-690…… 400 – 690V

  • Few versions cover everything
  • Minimized stocking
  • Easy to select
  • Torque control

No special version for Heavy duty starts

Wide current range covering down to 0,4times rated current

Wide supply voltage rangePST(B) all …..100 – 250V 50/60Hz

slide37

The Advanced range – PST30…PSTB1050

By-pass

Extra terminals

Extra terminals

Extra terminals

PST30…72

PST85…142

PST175…300

With by-pass

With by-pass

PSTB370…470

PSTB570…1050

slide38

The Advanced range - PST30…300

Three extra terminals B1,B2 and B3

By-pass

  • Easy to by-pass
  • Simplified wiring
  • 50% of the customer will use it.
  • Overload still active when by-passed.

Extra terminals

slide39

The Advanced range – PSTB370…1050

By-pass

  • Saving the cost for the by-pass contactor. (50% normally use it)
  • Space saving
  • Energy saving
  • Reduced wiring

With by-pass

AF-contactor

Example energy saving :1000A softstarter without by-pass = 3000W;PSTB1050 = 170W

Integrated by-pass contactor

slide40

The Advanced range – PST30…PSTB1050

Function description of EVENTS divided into Protections, Faults and Warnings

Stop-M = Stop with Manual reset

Stop-A = Stop with Automatic reset

Ind = Indication only

Protection

Motor overload protection

High current protection

SCR overload protection

Locked rotor protection

Under load protection

Phase reversal protection

Phase imbalance protection

PTC protection

Faults

Phase loss

By-pass fault

Fieldbus fault

Frequency fault

Over temperature heatsink

Shorted thyristor

Warnings

Motor overload warning

SCR overload warning

Overload warning (high current).

Underload warning (low current)

Operation

Stop-M or Stop-A or Ind

Operation

Stop-M or Stop-A

Operation

Ind

slide41

Time

Class 30

Class 20

Class 10

Motor overloadprotection

Class 10A

Current

The Advanced range – PST30…PSTB1050

Advanced electronic overload protection

  • Always integrated
  • No special version for heavy duty starts
  • Easy to set up
  • Possible to optimize for any application

Possible to set four trip classes: 10A,10, 20 & 30

Stop-M or Stop-A or Ind

No, Normal or Dual

slide42

The Advanced range – PST30…PSTB1050

Advanced electronic overload protection

Dual Overload protection

  • Heavy duty start and still “quick” reaction during normal operation
  • Suitable for all heavy duty starts.

Time

Start

Class 30

Class 20

Class 10

Run

Motor overloadprotection

Class 10A

Excellent protection

of the motor

Current

Switching from ”Start” to Run

30sec after Top of Ramp

No, Normal or Dual

Stop-M or Stop-A or Ind

slide43

The Advanced range – PST30…PSTB1050

Advanced electronic overload protection

slide44

The Advanced range – PST30…PSTB1050

Advanced electronic overload protection

Locked rotor protection

  • Extra fast protection when locked rotor.
  • Reduce stress and protection on transmissions

Active after reaching

Top pf Ramp

Time

Class 30

To avoid repair &

break down /

prevent down time

Class 20

Class 10

Class 10A

It is possible to set both reaction time and current level.

Current

slide45

The Advanced range – PST30…PSTB1050

Advanced electronic overload protection

Under load protection

  • Detect a broken belt – secure the process.
  • Detect a “dry” pump.

Active after reaching

Top pf Ramp

I

To avoid repair &

break down /

prevent down time

OK

Not OK

It is possible to set both current level & reaction time.

rpm

Low or Unloaded motor

slide46

M

M

M

The Advanced range – PST30…PSTB1050

Phase monitoring

Phase reversal protection

  • Prevent wrong rotation – sawmill, crusher, conveyor..
  • Mobile units.

To avoid accidents and damages.

???

L1,L2 & L3

L3,L2 & L1

It is possible to disconnect

slide47

M

The Advanced range – PST30…PSTB1050

Phase monitoring

Phase imbalanced protection

  • Detection of imbalanced currents. - Voltage variations- Motor problems

To avoid accidents and damages.

Active 30sec after Top of Ramp

It is possible to activate and set deviation level

slide48

M

The Advanced range – PST30…PSTB1050

Additional motor protection

PTC protection

  • Motors located in High temp areas or can be exposed for high ambient temperatures – Can not be detected by the E.O.L

To avoid repair & break down / prevent down time

For motors with integratedPTC elements

slide49

M

The Advanced range – PST30…PSTB1050

Analog output (as standard)

Select between

  • 0 ..10V
  • 0..20mA
  • 4…20mA
  • No need for additional CT’s
  • Possible to feed aPLC with information.
  • Possible to feed aVSD for controlling the flow / conveyor
  • Easy access to key information
  • Use the same terminals as for the PTC inputs(terminals 23 and 24)

I Amp, U Volt, P kW, P Hp, Q kVAr, S kVA, Motor temp, SCR temp, Cos Φ

slide50

Time

Softstarter protection

Class 30

Class 20

Class 10

Motor overloadprotection

Class 10A

Current

The Advanced range – PST30…PSTB1050

Advanced thyristor / SCR protection

Function

  • Measure the current and time – calculating the SCR temp + measure the heat sink temperature
  • Limit if trying to start too many starts per hour (also during installation)
  • Broken cooling fans
  • To high ambient temperature.

To prevent overheating and and ensure a long lifetime of the product.

slide51

The Advanced range – PST30…PSTB1050

Warnings

Possible to receive a pre-warning before trip.

  • Possible to correct fault without stopping.
  • Also possible to adjust the process / controlling

Warnings

Motor overload warning

Over temperature heatsink warning

Overload warning (high current).

Underload warning (low current)

To prevent unwanted stops / reduce downtime.

slide52

EVENT LIST

Protections / Faults

Motor overload protection

High current protection

SCR overload protection

Locked rotor protection

Under load protection

Phase reversal protection

Phase imbalance protection

PTC protection

Fault

Warnings

Overload warning

SCR overload warning

High current warning

Low current warning

The Advanced range – PST30…PSTB1050

Sophisticated signal relay features

Three voltage free programmable signal relays

  • K4 - Run, or Top of Ramp or Event
  • K5 - Top of Ramp, or Run or Event
  • K6 - Event, or Top of Ramp or Run

Each event can individually be programmed

to be On or OFF