MST Digital Soft MST Digital Soft Starter Soft Starter MST Digital From the moment the first electrical motors were developed, The results are: engineers have been searching for ways to avoid electrical and • Overloaded lines and unacceptable variation due to mechanical stress caused by the starting and stopping of motors. voltage and current transients from DOL and wye-delta starts. Problems with direct-on-line (DOL) starting include high inrush These transients can interfere with other equipment connected current, voltage spikes, and excessive mechanical wear that can to the power system, from dimming of lights to computer failure 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 • Excessive mechanical wear across the entire drive chain, from in many applications insufficient, as problems with current spikes motor to driven equipment, causing an increase in service and and torque peaks remain. It also does not provide any way to repair and causing unwanted down time perform a soft stop. The MST Digital Soft Starter, on the other hand, will provide far better performance during a start, as well as • Operational problems, such as damage to products conveyed during a stop. from station to station

Baldor has been producing soft starters for over 25 years. All of • For pump systems, water hammer and pressure surges put the experience we have gained has been combined with today’s excessive loading in pipelines from starting and stopping the digital technology and incorporated into the MST Digital Soft pumps Starter. Matching modern power electronics with smart circuitry and software, the Baldor MST Soft Starter offers superior control The financial consequences are considerable. Every technical of current and voltage during motor start and stop. It also offers problem and every breakdown costs money to diagnose and many new features that were unheard of in previous generations. repair, not to mention the loss in production.

The Mechanical & Electrical Solution An economical and simple solution is to install a Baldor MST AC motors are the workhorse of industry. They are used for Digital Soft Starter. The Baldor MST Soft Starter provides smooth countless applications, including fans, crushers, agitators, pumps, starting and stopping that minimizes mechanical and electrical and conveyors to name a few. Too often, unnecessary and stress on your equipment. 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.

Motor voltage Motor current Torque wye/delta

DOL wye/delta Softstart DOL 100% DOL wye/delta

70% Softstart 58% Softstart Adjustable ramp slope

30%

Time Motor speed Motor speed (1) The MST soft starter provides a more gradual (2) It lowers starting current and eliminates (3) The MST soft starter eliminates sudden acceleration. spikes. and damaging changes in motor torque.

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

2 www.baldor.com The Advanced Solution The MST Digital Soft Starter provides an advanced set of features Other advanced features include: including advanced protections, torque control, programmability • Built-in bypass (370A and above) and interface. • Display and keypad • Adjustable current limit MST Digital Advanced protections for not only the motor, but also the soft • Electronic motor overload protection Soft Starter starter and the load ensure trouble-free operation. Pre-warnings • Thermistor (PTC) input for motor protection detect problems before the motor needs to be stopped, which • Phase imbalance protection avoids unnecessary downtime. • Phase reversal protection • Locked protection The torque control function was developed and tested in • Thyristor (SCR) overtemperature protection collaboration with pump manufacturers to ensure the best • Underload protection possible stop without water hammer and pressure surges. • Programmable warning functions • Analog output The full text LCD display shows what’s happening in plain English • Event logger or other language. Preprogrammed application settings provide for • External keypad option fast and efficient setup. Fault logging assists with troubleshooting and diagnostics.

www.baldor.com 3 Pumps Soft Starter MST Digital 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 Desalination • Intake pumps • Intake pumps • Distribution pumps Water transmission • Transfer pumps • Brine pumps • Distribution pumps • Booster pumps • Booster pumps • High pressure pumps • Drinking water pumps

Water treatment • Treatment pumps

Effluent water • Effluent pumps

Raw water intake Raw water supply • Raw water intake pumps • Feed-water pump

Waste incineration Effluent water • Effluent pumps • 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

4 www.baldor.com Applications Fans: 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 MST Digital Soft Starter

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

Compressors 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 Conveyors 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 MST Digital Soft Starter Soft Starter MST Digital 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 Flexible Analog Output • Rated operational current 30 to 1040 A The analog output terminals can be connected to an analog • Full text display and 4 button keypad for easy setup and current meter to show the current during operation, eliminating operation the need for an additional current . The analog output • Optional external keypad, IP66 (indoor) can also be used as an analog input to a PLC or indicating/ • Built-in bypass contactor (from 370 A) for energy savings and metering device. reduced cooling needs • Ready for external bypass (30 – 300 A) Display and keypad • Torque Control for excellent control of pumps The MST soft starter is equipped with a full text display showing

• Current limit, adjustable between 1.5 – 7 x Ie all information in clear text in English or many other languages. • Dual motor overload protection with NEMA Class 10 and To make it even easier to set up, there are standard settings for Class 30 many common applications such as a centrifugal pump, which • Adaptable motor underload protection to detect pumps running will automatically configure the required settings including torque dry or broken belt control when stopping. • Adaptable locked rotor protection • PTC thermistor protection to protect the motor from overheating External keypad • Adjustable kick-start to start jammed pumps or conveyors As an option, the MST soft starter can be equipped with an • Programmable output Form C relays external keypad for easy setup and monitoring of the unit without • Programmable pre-warning functions opening the enclosure door. The keypad can also be used to copy • Event log with time stamp parameters between different soft starters. • Analog output showing current, voltage, power factor etc. 0 – 10 V, 0 – 20 mA, 4 – 20 mA

6 www.baldor.com MST Digital Soft Starter Screw mounting Description The MST Soft Starter can be selected according to the rated 2 programmable inputs motor power in normal duty for applications such as pumps, 3 programmable output MST Digital compressors, elevators, escalators, short conveyor belts and bow signal relays Soft Starter thrusters. Use heavy duty for applications such as centrifugal fans, crushers, mixers, mills, stirrers and long conveyor belts. 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

External keypad has same design as the fixed keypad

Enclosed Starter 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 • 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 Soft Starter MST Digital Open Starters - Overview

MST-30-CA ... MST-72-CA MST-85-CA ... MST-142-CA Soft Starter. Type Normal start MST-30-CA MST-37-CA MST-44-CA MST-50-CA MST-72-CA MST-85-CA MST-105-CA MST-142-CA Horsepower (460V) 20 25 30 40 50 60 75 100 UL Amps 28 34 42 54 68 80 104 130 Kilowatt (400 V) 15 18.5 22 25 37 45 55 75 IEC Amps 30 37 44 50 72 85 105 142 Max Power Loss (W) 100 120 140 160 230 270 325 435 with bypass (W) 10 11 14 14 17 31 35 37

Dimensions Inches 10.2 x 6.3 x 7.7 15.4 x 7.3 x 10.6 (h x w x d) Millimeters 260 x 160 x 196 390 x 186 x 270 Weight 11 lb (5 kg) 29 lb (13 kg) Using MCCB only, type 11) coordination will be achieved MCCB (10 kA, 480 - 600 V, 40 C) Ts3 T4 Using J fuses, type 11) coordination will be achieved J type fuse protection (85 kA) 45 A 50 A 70 A 90 A 110 A 125 A 175 A 225 A Fusible disconnect switch for the above J fuses Fusible disconnect switch OS60 OS100 OS200 OS400 Line contactors are not required for the soft starter itself Line contactor but often used to open if the Overload trips AF30 AF50 AF75 AF95 AF110 AF145 Overload protection is used to protect the motor from Electronic overload relay over heating Built-in Bypass contactors will reduce the power loss of the soft Bypass contactor starter. All soft starters can be operated without bypass AF16 AF26 AF30 AF50 AF75 AF110 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

8 www.baldor.com MST Digital Soft Starter Open Starters - Overview MST Digital Soft Starter

MST-175-CA ... MST-300-CA MST-370 ... MST-470 MST-570-CA ... MST-1050-CA Soft Starter. Type Normal start 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 Horsepower (460V) 125 150 200 250 300 400 500 600 700 900 UL Amps 156 192 248 302 361 480 590 720 840 1062 Kilowatt (400 V) 90 110.0 132 160 200 250 315 400 450 560 IEC Amps 175 210 250 300 370 470 570 720 840 1050 Max Power Loss (W) 540 645 765 920 ------with bypass (W) 62 67 67 90 90 110 105 110 170 170

Dimensions Inches 16.5 x 14.2 x 10.6 18.1 x 14.4 x 14.2 20.3 x 17.2 x 15.0 (h x w x d) Millimeters 420 x 360 x 270 460 x 366 x 361 515 x 436 x 381 Weight 51 lb (23 kg) 68 lb (31 kg) 132 lb (60 kg) Using MCCB only, type 1 coordination MCCB (18 kA, 480 - 600 V, 40 C) MCCB (30 kA, 480 - 600 V, 40 C) MCCB (42 kA, 480 - 600 V, 40 C) will be achieved T4 T5 T6 T7 T8

Type J or L fuses, type 1 coordination J or L type fuse protection (85 kA) will be achieved 250 A 300 A 400 A 500 A 600 A 800 A 1000 A 1200 A 1400 A 1800 A Fusible disconnect switch for the above Fusible disconnect switch J fuses OS400 OS600 OS800 OS1200 - - Line contactors are not required for the Line contactor soft starter itself but often used to open if the Overload trips AF185 AF210 AF260 AF300 AF400 AF580 AF750 AF1350 AF1650 Overload protection is used to protect Electronic overload relay the motor from over heating Built-in Bypass contactors will reduce the power Bypass contactor loss of the soft starter. All soft starters can be operated without bypass AF145 AF185 AF210 Built-in

www.baldor.com 9 MST Digital Soft Starter – Open Soft Starter MST Digital Ratings: Normal Starting – Class 10

Normal Starting - Class 10 Agitator Chiller Large Pump Axial blower Escalator Circular Saw Axial Fan Low Inertia Fan Conveyor, Screw Feeder Band Saw Propeller Fan Drill Press Centrifugal Pump Small Pump NOTE: If more than 10 starts per hour, select one size larger than the standard selection

MOTOR APPLICATION HORSEPOWER Soft Starter Normal Starting UL IEC Catalog Weight Class 10 - 400% torque for 30 seconds Size Amps Amps Number lb 208V 230V 460V 575V 7.5 10 20 25 28 30 MST-030-CA A 2 10 10 25 30 34 37 MST-037-CA A 2 10 15 30 40 42 44 MST-044-CA A 2 15 20 40 50 54 50 MST-050-CA A 2 20 25 50 60 68 72 MST-072-CA A 2 25 30 60 75 80 85 MST-085-CA B 5 30 40 75 100 104 105 MST-105-CA B 6 40 50 100 125 130 142 MST-142-CA B 6 50 60 125 150 156 175 MST-175-CA C 10 60 75 150 200 192 210 MST-210-CA C 10 75 100 200 250 248 250 MST-250-CA C 10 100 100 250 300 302 300 MST-300-CA C 10 125 150 300 350 361 370 MST-370-CA D 14 150 200 400 500 480 470 MST-470-CA D 14 200 250 500 600 590 570 MST-570-CA E 24 250 300 600 700 720 720 MST-720-CA E 25 300 350 700 800 840 840 MST-840-CA E 27 400 450 900 1000 1062 1050 MST-1050-CA E 27

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.

10 www.baldor.com MST Digital Soft Starter – Open Ratings: Heavy Starting – Class 30

Heavy Starting - Class 30 MST Digital Centrifugal Blower Loaded Screw Compressor Loaded Mixer Soft Starter Centrifugal Fan Loaded Reciprocating Compressor Elevator Chipper Pulverizer Positive Displacement Pump Disintegrator Rock Crusher Reciprocating Compressor Loaded Centrifuge Separator Vibrating Screen NOTE: If more than 10 starts per hour, select one size larger than the standard selection

MOTOR APPLICATION HORSEPOWER Soft Starter Heavy Starting UL IEC Catalog Weight Class 30 - 350% torque for 60 seconds Size Amps Amps Number lb 208V 230V 460V 575V - - - - - 30 MST-030-CA A 2 7.5 10 20 25 28 37 MST-037-CA A 2 10 10 25 30 34 44 MST-044-CA A 2 10 15 30 40 42 50 MST-050-CA A 2 15 20 40 50 54 72 MST-072-CA A 2 20 25 50 60 68 85 MST-085-CA B 5 25 30 60 75 80 105 MST-105-CA B 6 30 40 75 100 104 142 MST-142-CA B 6 40 50 100 125 130 175 MST-175-CA C 10 50 60 125 150 156 210 MST-210-CA C 10 60 75 150 200 192 250 MST-250-CA C 10 75 100 200 250 248 300 MST-300-CA C 10 100 100 250 300 302 370 MST-370-CA D 14 125 150 300 350 361 470 MST-470-CA D 14 150 200 400 500 480 570 MST-570-CA E 24 200 250 500 600 590 720 MST-720-CA E 25 250 300 600 700 720 840 MST-840-CA E 27 300 350 700 800 840 1050 MST-1050-CA E 27

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.

www.baldor.com 11 MST Digital Soft Starter - Enclosed Soft Starter MST Digital Combination Starter with Circuit Breaker Disconnect

Enclosed NEMA Type 12/4 Combination Starter with Disconnect MOTOR APPLICATION HORSEPOWER Soft Starter Normal Starting UL IEC Catalog Weight Class 10 - 400% torque for 30 seconds Size Amps Amps Number lb 208V 230V 460V 575V 15 20 40 50 54 50 MST-050-GD A 70 20 25 50 60 68 72 MST-072-GD A 72 25 30 60 75 80 85 MST-085-GD B 105 30 40 75 100 104 105 MST-105-GD B 110 40 50 100 125 130 142 MST-142-GD B 118 50 60 125 150 156 175 MST-175-GD C 210 60 75 150 200 192 210 MST-210-GD C 226 75 100 200 250 248 250 MST-250-GD C 230 100 100 250 300 302 300 MST-300-GD C 240 125 150 300 350 361 370 MST-370-GD D 343 150 200 400 500 480 470 MST-470-GD D 352

Enclosed NEMA Type 12/4 Combination Starter with Circuit Breaker MOTOR APPLICATION HORSEPOWER Soft Starter Heavy Starting UL IEC Catalog Weight Class 30 - 350% torque for 60 seconds Size Amps Amps Number lb 208V 230V 460V 575V 15 20 40 50 54 72 MST-072-GD A 72 - - - - - 85 MST-085-GD B 105 25 30 60 75 80 105 MST-105-GD B 110 30 40 75 100 104 142 MST-142-GD B 118 40 50 100 125 130 175 MST-175-GD C 210 50 60 125 150 156 210 MST-210-GD C 226 60 75 150 200 192 250 MST-250-GD C 230 75 100 200 250 248 300 MST-300-GD C 240 100 100 250 300 302 370 MST-370-GD D 343 - - - - - 470 MST-470-GD D 352 150 200 400 500 480 470 MST-470-GD D 352

Severe Duty NEMA Type 4 Combination Starter with Circuit Breaker Disconnect MOTOR APPLICATION HORSEPOWER Soft Starter Heavy Starting UL IEC Catalog Weight Class 30 - 350% torque for 60 seconds Size Amps Amps Number lb 208V 230V 460V 575V 40 50 100 125 130 175 MST-175-GS C 223 50 60 125 150 156 210 MST-210-GS C 228 60 75 150 200 192 250 MST-250-GS C 237 75 100 200 250 248 300 MST-300-GS C 244 100 100 250 300 302 370 MST-370-GS D 373 125 150 300 350 361 470 MST-470-GS D 399 150 200 400 500 480 570 MST-570-GS E 649 200 250 500 600 590 720 MST-720-GS E 681 250 300 600 700 720 840 MST-840-GS E 687

12 www.baldor.com MST Digital Soft Starter Combination Starter with Circuit Breaker Disconnect

Combination Starter Dimensions MST Digital Soft Starter Standard (inches) Size H W D D1 MST-50 ...72 -GD A 20.0 20.0 12.8 14.6 MST-85 ...142 -GD B 24.0 24.0 12.8 14.6 MST-175...300 -GD C 36.0 36.0 12.8 14.5

H MST-370... 470 -GD D 60.0 36.0 17.3 19.1 MST-570...840 -GD E 72.1 37.1 25.2 27.0

Metric (mm) Size H W D D1 SOLID STATE STARTER MST-50 ...72 -GD A 508 508 325 370

W D MST-85 ...142 -GD B 610 610 325 370 D1 MST-175...300 -GD C 914 914 325 369 MST-370... 470 -GD D 1524 914 439 485 MST-570...840 -GD E 1831 942 640 686 See previous page for combination starter weight

MST Digital Soft Starter Accessories

External MOV Catalog number Volts (Metal Oxide Varistor type voltage surge suppressor) MOV505L 460 • Protect from line-to-line voltage spikes MOV620EL 575 • Recommended for all low line impedance applications

Remote Keypad with Cable Catalog number Cable Length • 32 Character English alphanumeric display MSTEK 10 ft. • NEMA 4X indoor enclosure • Backlit LCD

www.baldor.com 13 MST Digital Soft Starter Soft Starter MST Digital Specifications

Rated insulation voltage Ui 690 V Control circuit

Rated operational voltage Ue 208...600 V + 10 % / -15 % 50/60 Hz ±5% Number of inputs 2 (start, stop) Rated control supply voltage Number of additional 2 (Each input can be programmed to 100...250 V +10% / -15% 50/60 Hz ±5% Us programmable inputs be either; Non, Reset, Enable, Jog, Rated control circuit voltage DOL- On, Start motor 2, Start motor 3 Internal or external 24 V DC U or FB-Dis) Signaling indication LED Starting capacity at Ie 4 x Ie for 10 sec. Overload capability Class 10 and Class 30 Power on Green Service factor MST-30...840 MST-1050 Fault Red 115 % 100 % Protection Yellow Ambient temperature Protections during operation ±0 ... +50 °C 1) Electronic overload Yes (Class 10A, 10, 20, 30) during storage -25 ... +70 °C Dual overload Yes (separate overload function for start and run) Maximum altitude 4000 m 2) PTC connection Yes Degree of protection MST-30...72 MST-85...MST-1050 Locked rotor protection Yes (Level and delay adjustable) main circuit IP10 IP00 supply and control circuit IP20 IP20 Underload protection Yes (Level and delay adjustable) Main circuit MST-30...300 MST-370...1050 Built-in Bypass contactor No Yes Phase imbalance Yes (Level and delay adjustable)

Cooling system - Fan cooled Yes (thermostat controlled) High current (8 x Ie ) Yes Keypad and display Full text Phase reversal protection Yes Languages English, German, Italian, Dutch, Chinese, Warnings (pre-warning) Finnish, Swedish, French, Spanish, Russian, High current Yes (Level and delay adjustable) Portuguese, Turkish, Polish and Czech Low current (underload) Yes (Level and delay adjustable) Keys 2 selection keys and 2 navigating keys Overload trip Yes (Level and delay adjustable) Digital output Form C contact Overtemp, thyristor (SCR) Yes Number of programmable 3 (each relay can be programmed to be signal relays Run, Bypass or Event signal) Start of several motors Possible to set up and start three K4 Default as Run signal Yes (Different parameter sets) different motors K5 Default as TOR (Bypass) signal PTC Thermistor input K6 Default as Event signal Switch off resistance 2825 ohm ± 20% Rated operational voltage, Ue 250 V AC / 24 V DC Switch on resistance 1200 ohm ± 20% Rated thermal current Ith 5 A External keypad Rated operational current Ie 1.5 A Display LCD type at AC-15 (Ue=250 V) Analog output Ambient temperature Output signal reference 0 ... 10 V, 0 ... 20 mA, 4 ... 20 mA During operation ±0 ... +50 °C Type of output signal I Amp, U Volt, P kW, P hp, Q kVAr, S kVA, During storage -25 ... +70 °C TmpMot, TmpSCR, cosPhi Degree of protection IP66 (Indoor) 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 Ie = 100 - (x-1000)/150] where x = actual altitude of the soft starter

14 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. MST Digital Soft Starter The chart below shows a curve for each tripping class from a cold state.

Time (s) 10 000

1000

100

Class 30 10 Class 20 Class 10 Class 10A

1

0 0 1 2 3 4 5 6 7 8 Current (x Ie) Tripping curves for electronic overload protection or MST Soft Starters from a cold state.

www.baldor.com 15 Contact your nearest Baldor Sales Office at these World Wide locations, or visit www.baldor.com

Baldor Electric Company P.O. Box 2400 Fort Smith, AR 72902-2400 U.S.A. Ph (479) 646-4711 • Fax (479) 648-5792 © Baldor Electric Company International Fax (479) 648-5895 Printed in U.S.A. BR852 www.baldor.com 3/13 TCP 5000