Power Automation Sweden AB

Cylindervägen 8
13152 Nacka Strand
Sweden

Smart motor starters, multifunctional motor starters

Smart motor starter with current monitoring up to 4 kW with a width of only 22.5 mm - MINISTART

The smart motor starters, often referred to as hybrid motor starters or electronic motor starters, switch and invert 1- and 3-phase motors up to 4 kW quickly and reliably in a space-saving compact enclosure with a width of only 22.5 mm. The motor starters combine up to 7 functions in one control cabinet enclosure and thus enable space savings of up to 80 % compared to the use of conventional devices. The smart motor starters of the MINISTART series offer a combination of motor control functions such as reversing function (counterclockwise rotation / clockwise rotation) or soft start / soft stop and monitoring functions such as current monitoring or motor protection functions as well as galvanic mains isolation. The motor starters ensure low-wear and gentle starting of machines and systems and are suitable for demanding drive tasks such as door and gate controls, conveyor systems as well as bridge and actuator drives and that in efficiency classes IE1, IE2 and IE3.

In addition to classic motor starters, multifunctional motor starters with Modbus RTU interface, phase sequence monitoring and phase failure detection are also available. The phase inverter with automatic rotating field correction also joins the wide product range of electronic motor starters.

Smart motor starter with current monitoring up to 4 kW with a width of only 22.5 mm - MINISTART The smart motor starters, often referred to as hybrid motor starters or electronic motor starters,... read more »
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Smart motor starters, multifunctional motor starters

Smart motor starter with current monitoring up to 4 kW with a width of only 22.5 mm - MINISTART

The smart motor starters, often referred to as hybrid motor starters or electronic motor starters, switch and invert 1- and 3-phase motors up to 4 kW quickly and reliably in a space-saving compact enclosure with a width of only 22.5 mm. The motor starters combine up to 7 functions in one control cabinet enclosure and thus enable space savings of up to 80 % compared to the use of conventional devices. The smart motor starters of the MINISTART series offer a combination of motor control functions such as reversing function (counterclockwise rotation / clockwise rotation) or soft start / soft stop and monitoring functions such as current monitoring or motor protection functions as well as galvanic mains isolation. The motor starters ensure low-wear and gentle starting of machines and systems and are suitable for demanding drive tasks such as door and gate controls, conveyor systems as well as bridge and actuator drives and that in efficiency classes IE1, IE2 and IE3.

In addition to classic motor starters, multifunctional motor starters with Modbus RTU interface, phase sequence monitoring and phase failure detection are also available. The phase inverter with automatic rotating field correction also joins the wide product range of electronic motor starters.

Highlights

  • Increased service life due to hybrid design
  • Easy commissioning, control, diagnostics and parameterization via Modbus RTU
  • Up to 7 functions in one device
  • Considerable space saving in the control cabinet due to a width of only 22.5 mm
  • Increased system availability due to blocking protection, optional motor protection
  • Robust power semiconductors up to 1500 V
  • Suitable for IE1, IE2 and IE3 motors and optionally also with UL approval
  • Automatic correction of the rotating field in the event of incorrect connection

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Many functions and high space saving as well as expandable

Narrow width of only 22.5 mm

Demanding drive tasks require powerful and flexible device solutions. The smart motor starters of the MINISTART series combine several functions in a compact device with a width of only 22.5 mm. The combination of motor control and monitoring functions means, for example, that conventional direct-on-line starters or conventional reversing starters can be dispensed with. This saves the user material costs, time for device connection and commissioning, as well as space and wiring requirements in the control cabinet.

The following functions can be monitored or switched, depending on the motor starter variants:

Multiple functions in one motor starter

Motorstarter Wenden

Turning (counterclockwise / clockwise)

Clockwise and counterclockwise rotation can be selected via control inputs or Modbus RTU. The direction of rotation is reversed without wear by semiconductor elements and motor-protecting by integrated soft start function.

Motorstarter Sanftanlauf

Motorstarter Sanftauslauf

Soft start / soft stop

The drive can start/stop without jerks and the drive elements are not damaged, i.e. maximum protection for mains, motor and machine.

Motorstarter Phasenausfall

Phase failure

In order not to load the motor with asymmetrical currents, it is checked at motor start whether the phases L1, L2, L3 are present.

Motorstarter Phasenfolge

Phase sequence monitoring

The phase sequence monitoring checks the direction of rotation of the phase voltage after switching on and signals an error in the case of a counterclockwise rotating field.

Motorstarter Motorschutz

Motor protection

Comfortable protection by the electronic motor protection relay with automatic and remote reset function.

Motorstarter IE3 ready

IE3 ready

Gentle operation of three-phase motors in efficiency classes IE1, IE2 and IE3.

Motorstarter Stromüberwachung

Current monitoring

The motor current is monitored to ensure blocking protection. The switching threshold is adjustable. This provides permanent protection of the motor and machine against overload.

Motorstarter Galvanische Netztrennung

Galvanic mains isolation

In the idle or fault state of the motor, the motor connection terminals are isolated from the mains voltage via a 3-pole, positively driven relay. 

Easy expansion for multi-motor applications

In addition, subsequent expansions can be easily planned and implemented. For example, in multi-motor applications, the motor starters already present in the control cabinet can be easily and cost-effectively expanded with additional smart motor starters thanks to their minimal enclosure width.

Networking with the Modbus RTU interface

Monitoring, switching, control and diagnostics with Modbus

Commissioning, parameterization and monitoring is simple and fast via the Modbus RTU interface. The fieldbus connection saves wiring and offers extensive diagnostic options that increase the system's reliability and availability. The simple integration of Modbus RTU is ideal for multi-motor applications, such as those usually found in wood heating systems for pellets or wood chips. A space-saving design of the power supply is possible due to a common fuse protection of all motor outlets with one circuit breaker and uniform cable cross sections. Likewise, all drives are controlled directly centrally via a Modbus RTU fieldbus line, eliminating the need for complex wiring.

Motorstarter_vernetzen_mit_Modbus_RTU

Durable and energy-efficient - hybrid switching technology perfectly combined

Robust relay technology combined with wear-free solid-state technology

The internal relay provides galvanic mains isolation of the power outputs. While a semiconductor control ensures smooth motor run-up, the direction of rotation is reversed by relay switching. The hybrid relay thus combines the advantages of robust relay technology with wear-free solid-state technology. The user benefits from a significantly longer device service life and reliability. With the integrated current monitoring as overload or blocking protection, the system availability is further increased.

Phase inverter with automatic rotating field correction

Automatic correction of the direction of rotation

The motor starters or phase inverters enable reliable starting of asynchronous motors and ensure that a clockwise rotating field is always applied to the motor when it is connected to the mains and that the motor runs correctly at the first attempt. The device automatically corrects the rotating field if the mains connection is incorrect, thus preventing the motor from running backwards and being damaged.

The phase inverter is suitable for applications in which equipment is connected to the mains at changing locations, especially for mobile machines such as pumps, blowers, grinders and compressors, as well as for use by fire departments or technical relief organizations. Whether retrofit or initial equipment, the phase inverter can be used in a space-saving manner and always ensures the correct direction of rotation. Troubleshooting or rewiring is therefore no longer necessary.

Integrated motor protection functions of the motor starter

Convenient protection thanks to the electronic motor protection relay

Due to the integrated motor protection function, separate motor protection switches can be omitted. A circuit breaker provides line and short-circuit protection for the entire system.

Are you looking for wear-free solid state technology with or without heat sinks?

The solid state relays from Dold are characterized by wear-free and noiseless switching of currents. Due to the long service life, you are spared a cost- and time-intensive device replacement. The device can be mounted on existing cooling surfaces. Optionally, the solid-state relays are also available with an appropriately pre-dimensioned heat sink (with additional heat sink called solid-state contactor), which allows a quick and easy commissioning.