Soft starts – smart stops - Emotron

Soft starts – smart stopsEmotron MSF 2.0 Softstarter

More than just a soft startStarting an electrical motor involves a number of challenges, such as high startcurrents and mechanical stress on equipment. This results in high energy, installationand maintenance costs. Emotron MSF handles this and a lot more. Start and stopsequences are optimized. Advanced braking techniques increase productivity.Built-in monitor functionality protects your process. Easy installation and set-upsave time and money. A soft-starter beyond the ordinary!CurrentEmotron MSF with torque controlSoftstarter with voltage controlY/D startDirect on line (DOL) start8765I/I N432DOL startY/D startVoltage/currentcontrol softstarterEmotron MSF torquecontrol softstarter2,0001,000Speed1,480 rpm102 4 6 8 10Time5 s 10 sTimeWith an Emotron MSF the start current is up to 30% lower thanwith a conventional softstarter.Emotron MSF offers efficient torque control that enables you tostart more smoothly with constant acceleration.

Ultra-smooth starts reduce your costsConventional softstarters use a pre-defined voltage rampto control the start. With Emotron MSF, the actual motortorque is continuously calculated and controlled accordingto the application requirements. This so called torque controlensures an ultra-smooth start with constant acceleration.The torque control means the start current is reduced evenfurther by up to 30%. You can use smaller fuses and lessexpensive cables, and will thus benefit from lower installationand energy costs. The smooth starts also lead to lessmechanical stress, improved process control and reducedmaintenance costs.Controlled starts for efficiency and safetyTorque boost can be used to overcome initial torque peakswhen starting, for example, a loaded crusher or mill. This willreduce mechanical stress as well as enhance efficiency inyour process. Starting a fan which is rotating in the wrongdirection due to a draught, will lead to high current peaksand mechanical stress and can result in blown fuses andbreakdown. Emotron MSF gradually slows the motor to acomplete stop before starting it in the right direction. Damageis prevented and mechanical vibrations are eliminated. Thestarting direction can be fully controlled, for example of atunnel fan if there is a fire when controlling the direction ofthe air flow is critical for safety reasons. Emotron MSF offersfull control without the need for an external PLC, thanks totwo inputs for start left/right and built-in control of forward/reverse contactors. You will benefit from simplified installationand reduced investment costs.Protect your process and maximize efficiencyThe Emotron MSF softstarter has a built-in load monitor thatprotects your machine and process against costly downtime,equipment damage and break-down. It reacts immediately ifa crusher is jammed, a pump is running dry, a compressor isidling, or a fan is operating inefficiently due to a blocked filter.This is achieved by constant viewing of the motor shaftpower. Any deviation from your selected load levels will resultin a warning or a quick but smooth stop. The actual load canbe displayed via, for example, Profibus. The monitor can alsobe used to determine when a process is ready, for example,when the viscosity is right in a mixing process. You can relyon an efficient and reliable operation protected from damageand interruptions.Smart stops with built-in braking functionalityThe definition of a smart stop depends on your application.For a pump, the aim is to slowly decrease the flow to preventmechanical stress on pipes and valves, while a saw oftenrequires a quick stop for security or productivity reasons. Theadvanced braking techniques of Emotron MSF softstartersmeets both challenges just as efficiently. When stoppinga pump you can benefit from the same smart principle aswhen starting it – a linear stop using the torque control. Youno longer risk water hammer and there is no need for costlyequipment such as motor-controlled valves. When a quickstop is needed, the brake functionality of Emotron MSFeliminates the need for expensive and space-consumingexternal brakes and saves you both investment and maintenancecosts. The built-in vector brake is used for handlinglow braking torque loads. The built-in reverse current brakeefficienctly handles high inertia loads in, for example, crusheror mill operation. It’s also the solution for band saws andsaw applications where extremely short braking times arerequired.LoadSpeedOverload stopOverload warningVoltage/current controlsoftstarterNormal load curveUnderload warningUnderload stopDOLstartY/D startEmotron MSFtorquecontrolTimeA built-in load monitor protects your process against damage and inefficiencyby sending a warning or stopping the process at your chosen load levels.2 4 6 8 10 12 14The torque control ensures a linear stop that protects your pump fromwater hammer. No motor-controlled valves are required.Time

Emotron MSF offers versatilecommunication options with, forexample, a control room. Analogue,digital, serial and fieldbuscommunication are supported.

Easy to install and easy to useInstallation is quick and cost-efficient, since no additional equipment is required.Everything you need is included in the Emotron MSF unit. A number of optionslet you customize the Emotron MSF functionality and fully utilize the softstarteraccording to your needs.Quick and cost-efficient installationInstalling an Emotron MSF unit is quick and cost-efficient.There is no need for any of the additional equipment usuallyrequired to complement soft starter functions – DC brakes,motor protection relays, mains failure relays, load monitors,meters, displays or switches. Everything you need is includedin the Emotron MSF unit. Programming the settingsaccording to your needs is also quick and easy.Programmable inputs increase flexibilityEmotron MSF has four programmable inputs that offer greatflexibility and extended functionality. For example, you cancontrol the rotation direction of a fan by programming twoinputs for start left and start right respectively. An externalalarm signal can be connected to stop the motor if a problemoccurs. An analogue sensor can be connected directly to theEmotron MSF to control start and stop levels of a pump.Installation is simplified and investment costs are reducedsince no external PLC is required. Up to four different parametersets can be selected via the programmable inputs.Versatile communication optionsIn many applications, the softstarter is one of several controldevices. To enable communication between these devicesand with e.g. a control room, Emotron MSF provides versatilecommunication options:Several process values and system parameters are availablevia the communication interfaces. These can be used inyour control system to achieve optimal performance atminimal cost.• Current• Voltage• Shaft power• Energy consumption• Power factor• Shaft torque• Operating time• Motor thermal capacityExternal control panelAn external control panel is available as an option. It can bemounted on the front of a panel door or a control cabinet forremote control of the softstarter. Maximum distance betweensoftstarter and external control panel is three metres.Cable kit and cable entry boxAn optional cable kit can be used together with the bypassfunction to facilitate connection of external current transformers.A cable entry box makes it possible to mount anEmotron MSF 017-085 using cable glands to attach thecables. Protection class is IP20.• Fieldbus communication (Profibus, DeviceNet)• Serial communication (RS232, RS485, Modbus)• Analogue and digital outputsEthernet and other communication buses are available viaa gateway unit.

APPLICATIONSPumpsFansCompressorsBlowersCrushersScreensMillsMixersSaws

A wide range to suit your needsTECHNICAL DATAEmotron MSF 2.0 softstarters are available in the following range:Supply voltage 200 – 690 V, 3-phaseRated current 17 – 1,650 ARated power 7.5 – 1,600 kWProtection class IP20, NEMA 1 (up to 960 A)IP00, NEMA 0 (up to 1,650 A)Approvals CE, UL, GOST RFor further technical information, please seethe Emotron MSF 2.0 data sheet.

CG Drives & AutomationMörsaregatan 12Box 222 25SE-250 24 HelsingborgT + 46 42 16 99 00F +46 42 16 99 49info.se@cgglobal.comwww.cgglobal.com / www.emotron.comCG Drives & Automation 01-3831-01r1 2012-05