MST Digital Soft Starter

MST Digital Soft Starter

MST Digital Soft Starter

From the moment the first electrical motors were developed, engineers have been searching for ways to avoid electrical and mechanical stress caused by the starting and stopping of motors.

Problems with direct-on-line (DOL) starting include high inrush current, voltage spikes, and excessive mechanical wear that can occur when motors start and stop. One traditional way to avoid this is to use a wye (aka “star”) delta starter, but this method is in many applications insufficient, as problems with current spikes and torque peaks remain. It also does not provide any way to perform a soft stop. The MST Digital Soft Starter, on the other hand, will provide far better performance during a start, as well as during a stop.

The results are:

• Overloaded lines and unacceptable voltage variation due to voltage and current transients from DOL and wye-delta starts.

These transients can interfere with other equipment connected to the power system, from dimming of lights to computer failure

• Excessive mechanical wear across the entire drive chain, from motor to driven equipment, causing an increase in service and repair and causing unwanted down time

• Operational problems, such as damage to products conveyed from station to station

Baldor has been producing soft starters for over 25 years. All of the experience we have gained has been combined with today’s digital technology and incorporated into the MST Digital Soft

Starter. Matching modern power electronics with smart circuitry and software, the Baldor MST Soft Starter offers superior control of current and voltage during motor start and stop. It also offers many new features that were unheard of in previous generations.

• For pump systems, water hammer and pressure surges put excessive loading in pipelines from starting and stopping the pumps

The financial consequences are considerable. Every technical problem and every breakdown costs money to diagnose and repair, not to mention the loss in production.

The Mechanical & Electrical Solution

AC motors are the workhorse of industry. They are used for countless applications, including fans, crushers, agitators, pumps, and conveyors to name a few. Too often, unnecessary and unwanted torque and current spikes are an everyday occurrence in production plants all over the world, damaging electrical equipment and causing unnecessary wear on mechanical systems.

An economical and simple solution is to install a Baldor MST

Digital Soft Starter. The Baldor MST Soft Starter provides smooth starting and stopping that minimizes mechanical and electrical stress on your equipment.

100%

Motor voltage

DOL wye/delta

Softstart

Motor current wye/delta

DOL

Torque

DOL wye/delta

70%

Softstart

58%

Softstart

Adjustable ramp slope

30%

Time

(1) The MST soft starter provides a more gradual acceleration.

Motor speed

(2) It lowers starting current and eliminates spikes.

Motor speed

(3) The MST soft starter eliminates sudden and damaging changes in motor torque.

2

The MST Soft Starter compared to direct-on-line (DOL) and wye-delta (aka “star-delta”)

www.baldor.com

The Advanced Solution

The MST Digital Soft Starter provides an advanced set of features including advanced protections, torque control, programmability and interface.

Advanced protections for not only the motor, but also the soft starter and the load ensure trouble-free operation. Pre-warnings detect problems before the motor needs to be stopped, which avoids unnecessary downtime.

The torque control function was developed and tested in collaboration with pump manufacturers to ensure the best possible stop without water hammer and pressure surges.

The full text LCD display shows what’s happening in plain English or other language. Preprogrammed application settings provide for fast and efficient setup. Fault logging assists with troubleshooting and diagnostics.

Other advanced features include:

• Built-in bypass (370A and above)

• Display and keypad

• Adjustable current limit

• Electronic motor overload protection

• Thermistor (PTC) input for motor protection

• Phase imbalance protection

• Phase reversal protection

• Locked rotor protection

• Thyristor (SCR) overtemperature protection

• Underload protection

• Programmable warning functions

• Analog output

• Event logger

• External keypad option

www.baldor.com

3

4

Pumps

Water is the world’s most important resource and water facilities can be found all over the world. Examples of water applications are freshwater and wastewater systems, circulating water for heating or cooling and irrigation.

Industrial use

• Process feed-water pumps

• District heating pumps

• Cooling water pumps

• Slurry pumps

Wastewater transportation

• Influent and effluent pumps

• Treatment pumps and fans

Drinking water distribution

• Distribution pumps

• Booster pumps

Irrigation

• Intake pumps

• Distribution pumps

Water transmission

• Transfer pumps

• Distribution pumps

• Booster pumps

Desalination

• Intake pumps

• Brine pumps

• Booster pumps

• High pressure pumps

• Drinking water pumps

Water treatment

• Treatment pumps

Effluent water

• Effluent pumps

Raw water intake

• Raw water intake pumps

Raw water supply

• Feed-water pump

Effluent water

• Effluent pumps

Waste incineration

• Effluent pumps

• Fans

• Conveyors

Pumps:

Q How are voltage drops avoided while starting?

A Baldor MST Soft Starters will reduce the starting current, thus avoiding the voltage drop

Q How is water hammer avoided while stopping?

A Baldor MST Soft Starters use an optimized stop ramp and control motor torque to eliminate water hammer

Q How does the MST Soft Starter protect the equipment?

A Baldor MST Soft Starters are equipped with specially designed protection algorithms to monitor overload, underload, and locked rotor conditions

www.baldor.com

Applications

Fans

Compressors

Conveyors

Fans:

Q How are extended voltage drops avoided during long starting times?

A Baldor MST Soft Starters are equipped with current limit to keep control of the starting current

Q How is the life of the driving belts extended?

A The Baldor MST Soft Starters reduce the mechanical stress during start, thus avoiding belt slippage

Q How is the operation of the fan improved?

A A Baldor MST Soft Starter with underload protection will detect a broken belt immediately and alert the operator to the problem

Compressors:

Q How is compressor life extended?

A Using a Baldor MST Soft Starter for starting will reduce the accelerating torque, thereby minimizing the mechanical stress

Q How is the compactness of the compressor enhanced?

A Using a compact Baldor MST Soft Starter will reduce the size of starting equipment over a typical wye delta starter

Conveyors:

Q How is service and repair of the conveyor belt or chain reduced?

A A Baldor MST Soft Starter will cause minimal mechanical stress on the conveyor belt

Q How do you avoid running the conveyor belt in the wrong direction?

A Use a Baldor MST Soft Starter with phase reversal protection

Q How is efficiency of the conveyor belt improved?

A Using the Baldor MST Soft Starter with high and low current warnings allows you to adjust the load of the conveyor belt for optimal efficiency

Q How is starting ensured even when there is high starting resistance?

A A Baldor MST Soft Starter with kick start function will provide sufficient torque to be able to overcome the initial high friction from, for example, a temporarily jammed belt

Q How often do fast starting conveyors cause material spillage or pileup?

A Use Baldor MST Soft Starter to softly accelerate material handling conveyors

www.baldor.com

5

6

MST Digital Soft Starter

Description

MST Digital Soft Starter

Baldor continues a proud tradition of offering the very latest in motor control technology by introducing the MST digital soft starter with six SCR three phase voltage control.

Torque Control

The torque control function was developed and tested in collaboration with pump manufacturers to ensure the best possible stop without water hammer and pressure surges.

Bypass for Energy Savings

Bypassing the soft starter after reaching full voltage saves energy and reduces heat. The MST soft starters are equipped with extra terminals making the connection to an external bypass contactor easy, while allowing all protections to be active during bypass. Soft starters starting at 370 Amps have a built-in bypass contactor, ensuring a compact solution that simplifies installation.

Advanced Protections

The MST soft starters are equipped with almost all protections imaginable for protecting the motor, the soft starter and the application. To offer more flexibility, protections can be tailored to specific needs.

Features

• Wide range of operational voltage 208 – 575 V AC

• Rated operational current 30 to 1040 A

• Full text display and 4 button keypad for easy setup and operation

• Optional external keypad, IP66 (indoor)

• Built-in bypass contactor (from 370 A) for energy savings and reduced cooling needs

• Ready for external bypass (30 – 300 A)

• Torque Control for excellent control of pumps

• Current limit, adjustable between 1.5 – 7 x I e

• Dual motor overload protection with NEMA Class 10 and

Class 30

• Adaptable motor underload protection to detect pumps running dry or broken belt

• Adaptable locked rotor protection

• PTC thermistor protection to protect the motor from overheating

• Adjustable kick-start to start jammed pumps or conveyors

• Programmable output Form C relays

• Programmable pre-warning functions

• Event log with time stamp

• Analog output showing current, voltage, power factor etc.

0 – 10 V, 0 – 20 mA, 4 – 20 mA

Flexible Analog Output

The analog output terminals can be connected to an analog current meter to show the current during operation, eliminating the need for an additional current transformer. The analog output can also be used as an analog input to a PLC or indicating/ metering device.

Display and keypad

The MST soft starter is equipped with a full text display showing all information in clear text in English or many other languages.

To make it even easier to set up, there are standard settings for many common applications such as a centrifugal pump, which will automatically configure the required settings including torque control when stopping.

External keypad

As an option, the MST soft starter can be equipped with an external keypad for easy setup and monitoring of the unit without opening the enclosure door. The keypad can also be used to copy parameters between different soft starters.

www.baldor.com

MST Digital Soft Starter

Description

The MST Soft Starter can be selected according to the rated motor power in normal duty for applications such as pumps, compressors, elevators, escalators, short conveyor belts and bow thrusters. Use heavy duty for applications such as centrifugal fans, crushers, mixers, mills, stirrers and long conveyor belts.

Screw mounting

2 programmable inputs

3 programmable output signal relays

Built-in bypass on 370

Amp units and over

All data available on the front

Analog output or PTC input

Keypad and Display

Green “Power On” LED

Red “Fault” LED

Yellow “Protection” LED

Full text display

User friendly keypad

Preset application settings

Enclosed Starter

External keypad has same design as the fixed keypad

Baldor enclosed combination starters have open starters mounted and wired in NEMA 12/4 packages. Each combination starter includes:

• bypass contactor for increased efficiency

• circuit breaker with door-mounted disconnect handle

• 2-wire control circuit

• space heater

• shunt trip

• Hand/Auto/Off selector switch

• indicator lights

Combination starters are available in Class 10 and Class 30 motor overload protection. Also available in a severe duty rating with manually energized bypass for emergency direct on line (DOL) starting.

www.baldor.com

7

MST Digital Soft Starter

Open Starters - Overview

8

Normal start

Horsepower (460V)

UL Amps

Kilowatt (400 V)

IEC Amps

Max Power Loss (W) with bypass (W)

Inches

Dimensions

(h x w x d)

Weight

Millimeters

Using MCCB only, type 1 1) coordination will be achieved

Using J fuses, type 1

Fusible disconnect switch for the above J fuses

Line contactors are not required for the soft starter itself but often used to open if the Overload trips

Overload protection is used to protect the motor from over heating

1) coordination will be achieved

Bypass contactors will reduce the power loss of the soft starter. All soft starters can be operated without bypass

MST-030-CA ... MST-072-CA

Soft Starter. Type

MST-030-CA

20

MST-037-CA

25

MST-044-CA

30

MST-050-CA

40

28

15

30

100

10

34

18.5

37

120

11

42

22

44

140

54

25

50

160

14 14

10.2 x 6.3 x 7.7

260 x 160 x 196

11 lb (5 kg)

MCCB (10 kA, 480 - 600 V, 40 C)

Ts3

J type fuse protection (85 kA)

45 A 50 A

Fusible disconnect switch

OS60

Line contactor

AF30

Electronic overload relay

70 A

AF50

OS100

90 A

Built-in

MST-072-CA

50

68

37

72

230

17

110 A

AF75

Bypass contactor

AF16 AF26 AF30 AF50

MST-085-CA ... MST-142-CA

MST-085-CA

60

80

45

85

270

31

125 A

OS200

AF95

MST-105-CA

75

104

55

105

325

35

15.4 x 7.3 x 10.6

390 x 186 x 270

29 lb (13 kg)

175 A

AF110

AF75

T4

1) In the event of short circuit Type 1 coordination assures no discharged part beyond the enclosure with soft starter, overload (and contacter) and internal parts damage is acceptable and may occur

MST-142-CA

100

130

75

142

435

37

225 A

OS400

AF145

AF110

www.baldor.com

MST Digital Soft Starter

Open Starters - Overview

Normal start

Horsepower (460V)

UL Amps

Kilowatt (400 V)

IEC Amps

Max Power Loss (W) with bypass (W)

Inches

Dimensions

(h x w x d)

Millimeters

Weight

Using MCCB only, type 1 coordination will be achieved

MST-175-CA ... MST-300-CA

Soft Starter. Type

MST-175-CA

125

MST-210-CA

150

MST-250-CA

200

156

90

175

540

62

192

110.0

210

645

67 67

16.5 x 14.2 x 10.6

420 x 360 x 270

51 lb (23 kg)

MCCB (18 kA, 480 - 600 V, 40 C)

T4 T5

Type J or L fuses, type 1 coordination will be achieved

Fusible disconnect switch for the above

J fuses

J or L type fuse protection (85 kA)

250 A 300 A

Fusible disconnect switch

OS400

400 A

Line contactor Line contactors are not required for the soft starter itself but often used to open if the Overload trips

Overload protection is used to protect the motor from over heating

AF185 AF210

Electronic overload relay

AF260

248

132

250

765

Bypass contactors will reduce the power loss of the soft starter. All soft starters can be operated without bypass

Bypass contactor

AF145 AF185

MST-300-CA

250

302

160

300

920

90

500 A

AF300

AF210

OS600

MST-370 ... MST-470

MST-370-CA

300

361

200

MST-470-CA

400

480

250

370

-

470

-

90 110

18.1 x 14.4 x 14.2

460 x 366 x 361

68 lb (31 kg)

MCCB (30 kA, 480 - 600 V, 40 C)

MST-570-CA

500

590

315

570

-

105

T6

600 A

AF400

Built-in

800 A

OS800

AF580

1000 A

MST-570-CA ... MST-1050-CA

MST-720-CA

600

720

400

OS1200

AF750

Built-in

1200 A

T7

MST-840-CA

700

840

450

720

-

840

-

110 170

20.3 x 17.2 x 15.0

1400 A

-

AF1350

MST-1050-CA

900

1062

560

1050

-

170

515 x 436 x 381

132 lb (60 kg)

MCCB (42 kA, 480 - 600 V, 40 C)

T8

1800 A

-

AF1650

www.baldor.com

9

10

MST Digital Soft Starter – Open

Ratings: Normal Starting – Class 10

Normal Starting - Class 10

Agitator

Axial blower

Axial Fan

Band Saw

Centrifugal Pump

Chiller

Escalator

Low Inertia Fan

Propeller Fan

Small Pump

Large Pump

Circular Saw

Conveyor, Screw Feeder

Drill Press

NOTE: If more than 10 starts per hour, select one size larger than the standard selection

20

25

30

40

50

60

75

100

125

MOTOR APPLICATION HORSEPOWER

Normal Starting

Class 10 - 400% torque for 30 seconds

208V 230V 460V 575V

7.5

10

10

15

10

10

15

20

20

25

30

40

25

30

40

50

150

200

250

300

400

25

30

40

50

60

75

100

100

150

200

250

300

350

450

50

60

75

100

125

150

200

250

300

400

500

600

700

900

500

600

700

800

1000

60

75

100

125

150

200

250

300

350

Prosoft Sizing Software

These tables can be used to quickly select a suitable soft starter for most applications. If a more precise selection is required, or for diverse applications such as extreme heavy duty, use the Baldor

Prosoft selection tool, available from www.Baldor.com.

UL

Amps

68

80

104

130

156

28

34

42

54

192

248

302

361

480

590

720

840

1062

IEC

Amps

Soft Starter

Catalog

Number

72

85

105

142

175

30

37

44

50

210

250

300

370

470

570

720

840

1050

MST-030-CA

MST-037-CA

MST-044-CA

MST-050-CA

MST-072-CA

MST-085-CA

MST-105-CA

MST-142-CA

MST-175-CA

MST-210-CA

MST-250-CA

MST-300-CA

MST-370-CA

MST-470-CA

MST-570-CA

MST-720-CA

MST-840-CA

MST-1050-CA

Size

B

B

C

A

B

A

A

A

A

C

C

C

D

E

E

E

D

E

www.baldor.com

MST Digital Soft Starter – Open

Ratings: Heavy Starting – Class 30

Heavy Starting - Class 30

Centrifugal Blower

Centrifugal Fan

Chipper

Disintegrator

Loaded Centrifuge

Loaded Screw Compressor Loaded Mixer

Loaded Reciprocating Compressor Elevator

Pulverizer

Rock Crusher

Separator

Positive Displacement Pump

Reciprocating Compressor

Vibrating Screen

NOTE: If more than 10 starts per hour, select one size larger than the standard selection

15

20

25

30

40

50

60

75

100

MOTOR APPLICATION HORSEPOWER

Heavy Starting

Class 30 - 350% torque for 60 seconds

208V 230V 460V 575V

-

7.5

10

10

-

10

10

15

-

20

25

30

-

25

30

40

125

150

200

250

300

20

25

30

40

50

60

75

100

100

150

200

250

300

350

40

50

60

75

100

125

150

200

250

300

400

500

600

700

350

500

600

700

800

50

60

75

100

125

150

200

250

300

Soft Starter Simulator Software

Save time during installation by simulating the MST Soft Starter keypad interface on your PC. Practice setup. Simulate start, stop and fault events. Available at no charge from the Baldor Website, www.Baldor.com.

UL

Amps

54

68

80

104

130

-

28

34

42

156

192

248

302

361

480

590

720

840

IEC

Amps

Soft Starter

Catalog

Number

72

85

105

142

175

30

37

44

50

210

250

300

370

470

570

720

840

1050

MST-030-CA

MST-037-CA

MST-044-CA

MST-050-CA

MST-072-CA

MST-085-CA

MST-105-CA

MST-142-CA

MST-175-CA

MST-210-CA

MST-250-CA

MST-300-CA

MST-370-CA

MST-470-CA

MST-570-CA

MST-720-CA

MST-840-CA

MST-1050-CA

Size

B

B

C

A

B

A

A

A

A

C

C

C

D

E

E

E

D

E

www.baldor.com

11

12

MST Digital Soft Starter - Enclosed

Combination Starter with Circuit Breaker Disconnect

Enclosed NEMA Type 12/4 Combination Starter with Disconnect

MOTOR APPLICATION HORSEPOWER

Normal Starting

Soft Starter

Class 10 - 400% torque for 30 seconds

UL

Amps

IEC

Amps

Catalog

Number

208V

40

50

60

75

15

20

25

30

100

125

150

230V

50

60

75

100

20

25

30

40

100

150

200

460V

100

125

150

200

40

50

60

75

250

300

400

575V

50

60

75

100

125

150

200

250

300

350

500

54

68

80

104

130

156

192

248

302

361

480

50

72

85

105

142

175

210

250

300

370

470

MST-050-GD

MST-072-GD

MST-085-GD

MST-105-GD

MST-142-GD

MST-175-GD

MST-210-GD

MST-250-GD

MST-300-GD

MST-370-GD

MST-470-GD

Size

Weight lb

C

C

B

C

B

B

A

A

C

D

D

70

72

105

110

118

210

226

230

240

343

352

Enclosed NEMA Type 12/4 Combination Starter with Circuit Breaker

MOTOR APPLICATION HORSEPOWER Soft Starter

Heavy Starting

UL

Amps

IEC

Amps

Catalog

Number

Class 30 - 350% torque for 60 seconds

208V

40

50

60

75

15

-

25

30

100

-

150

230V

50

60

75

100

20

-

30

40

100

-

200

460V

100

125

150

200

40

-

60

75

250

-

400

575V

50

-

75

100

125

150

200

250

300

-

500

54

-

80

104

130

156

192

248

302

-

480

72

85

105

142

175

210

250

300

370

470

470

MST-072-GD

MST-085-GD

MST-105-GD

MST-142-GD

MST-175-GD

MST-210-GD

MST-250-GD

MST-300-GD

MST-370-GD

MST-470-GD

MST-470-GD

C

C

C

C

B

B

A

B

D

D

D

Size

Weight lb

72

105

110

118

210

226

230

240

343

352

352

Severe Duty NEMA Type 4 Combination Starter with Circuit Breaker Disconnect

MOTOR APPLICATION HORSEPOWER Soft Starter

Heavy Starting

UL

Amps

IEC

Amps

Catalog

Number

Size Class 30 - 350% torque for 60 seconds

208V

100

125

150

200

250

40

50

60

75

230V

50

60

75

100

100

150

200

250

300

460V

100

125

150

200

250

300

400

500

600

575V

125

150

200

250

300

350

500

600

700

130

156

192

248

302

361

480

590

720

175

210

250

300

370

470

570

720

840

MST-175-GS

MST-210-GS

MST-250-GS

MST-300-GS

MST-370-GS

MST-470-GS

MST-570-GS

MST-720-GS

MST-840-GS

E

E

D

D

E

C

C

C

C

Weight lb

223

228

237

244

373

399

649

681

687

www.baldor.com

H

MST Digital Soft Starter

Combination Starter with Circuit Breaker Disconnect

Combination Starter Dimensions

Standard (inches)

MST-050 ...072 -GD

Size

A

H

20.0

MST-085 ...142 -GD

MST-175...300 -GD

MST-370... 470 -GD

MST-570...840 -GD

D

E

B

C

24.0

36.0

60.0

72.1

W

20.0

24.0

36.0

36.0

37.1

D

12.8

12.8

12.8

17.3

25.2

D1

14.6

14.6

14.5

19.1

27.0

SOLID STATE STARTER

W

D1

D

Metric (mm)

MST-050 ...072 -GD

Size

A

H

508

MST-085 ...142 -GD

MST-175...300 -GD

MST-370... 470 -GD

B

C

D

610

914

1524

MST-570...840 -GD E

See previous page for combination starter weight

1831

W

508

610

914

914

942

D

325

325

325

439

640

D1

370

370

369

485

686

MST Digital Soft Starter

Accessories

External MOV

(Metal Oxide Varistor type voltage surge suppressor)

• Protect from line-to-line voltage spikes

• Recommended for all low line impedance applications

Catalog number

MOV505L

MOV620EL

Remote Keypad with Cable

• 32 Character English alphanumeric display

• NEMA 4X indoor enclosure

• Backlit LCD

Catalog number

MSTEK

Volts

460

575

Cable Length

10 ft.

www.baldor.com

13

14

MST Digital Soft Starter

Specifications

Rated insulation voltage U i

Rated operational voltage U e

Rated control supply voltage

U s

Rated control circuit voltage

U

Starting capacity at I e

Overload capability

Service factor

690 V

208...600 V + 10 % / -15 % 50/60 Hz ±5%

100...250 V +10% / -15% 50/60 Hz ±5%

Internal or external 24 V DC

4 x I e

for 10 sec.

Class 10 and Class 30

MST-030...840

115 %

MST-1050

100 %

Ambient temperature

during operation

during storage

Maximum altitude

Degree of protection

main circuit

supply and control circuit

Main circuit

Built-in Bypass contactor

±0 ... +50 °C

-25 ... +70 °C

4000 m

2)

1)

MST-030...072

IP10

IP20

MST-030...300

No

MST-085...MST-1050

IP00

IP20

MST-370...1050

Yes

Cooling system - Fan cooled Yes (thermostat controlled)

Keypad and display

Full text

Languages

Keys

English, German, Italian, Dutch, Chinese,

Finnish, Swedish, French, Spanish, Russian,

Portuguese, Turkish, Polish and Czech

2 selection keys and 2 navigating keys

Digital output

Number of programmable signal relays

K4

K5

Form C contact

3 (each relay can be programmed to be

Run, Bypass or Event signal)

Default as Run signal

Default as TOR (Bypass) signal

K6

Rated operational voltage, U e

Rated thermal current I th

Rated operational current I e at AC-15 (U e

=250 V)

Analog output

Output signal reference

Default as Event signal

250 V AC / 24 V DC

5 A

1.5 A

0 ... 10 V, 0 ... 20 mA, 4 ... 20 mA

Type of output signal I Amp, U Volt, P kW, P hp, Q kVAr, S kVA,

TmpMot, TmpSCR, cosPhi

1)Above 40

°

C up to max. 50

°

C reduce the rated current with 0.8% per deg. C

2)When used at high altitudes above 1000 meters up to 4000 meters, derate the rated current using the following formula:

[% of I e

= 100 - (x-1000)/150] where x = actual altitude of the soft starter

Control circuit

Number of inputs

Number of additional programmable inputs

2 (start, stop)

2 (Each input can be programmed to be either; Non, Reset, Enable, Jog,

DOL- On, Start motor 2, Start motor 3 or FB-Dis)

Signaling indication LED

Power on

Fault

Protection

Protections

Electronic overload

Dual overload

Green

Red

Yellow

PTC connection

Locked rotor protection

Underload protection

Yes (Class 10A, 10, 20, 30)

Yes (separate overload function for start and run)

Yes

Yes (Level and delay adjustable)

Phase imbalance

High current (8 x I e

)

Phase reversal protection

Warnings (pre-warning)

High current

Low current (underload)

Overload trip

Overtemp, thyristor (SCR)

Start of several motors

Possible to set up and start three different motors

PTC Thermistor input

Switch off resistance

Switch on resistance

External keypad

Display

Ambient temperature

During operation

During storage

Degree of protection

Yes (Level and delay adjustable)

Yes (Level and delay adjustable)

Yes

Yes

Yes (Level and delay adjustable)

Yes (Level and delay adjustable)

Yes (Level and delay adjustable)

Yes

Yes (Different parameter sets)

2825 ohm ± 20%

1200 ohm ± 20%

LCD type

±0 ... +50 °C

-25 ... +70 °C

IP66 (Indoor)

www.baldor.com

MST Digital Soft Starter

Trip Curves for the Integrated Overload Protection

All units have an integrated electronic overload protection. It is possible to set it on four different tripping classes.

The chart below shows a curve for each tripping class from a cold state.

Time (s)

10 000

1000

100

10

1

0

0

1 2 3

4 5 6

Tripping curves for electronic overload protection for MST Soft Starters from a cold state.

7 8

Current (x

Ie

)

Class 30

Class 20

Class 10

Class 10A

www.baldor.com

15

Contact your nearest Baldor Sales Office at these

World Wide locations, or visit www.baldor.com

© Baldor Electric Company

BR852

Baldor Electric Company

P.O. Box 2400

Fort Smith, AR 72902-2400 U.S.A.

Ph (479) 646-4711 • Fax (479) 648-5792

International Fax (479) 648-5895 www.baldor.com

Printed in U.S.A.

01/14 TCP 5000

Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertisement