Variable speed starters are a new option for motor control

Eaton has developed an innovative new option for motor control - the Variable Speed Starter (VSS). The new VSS combines the simplicity of a conventional fixed-speed starter with the ability to vary the speed of the motor. VSSs, of which Eaton's new PowerXL DE1 products are the first to reach the market, provide machine and system builders with a highly reliable and cost-effective alternative for motor control that will be particularly useful for helping them to increase energy efficiency in applications where fixed-speed starters were previously used.

Guido Kerzmann, product line manager at Eaton, Electrical Sector EMEA, says: "The Energy related Products (ErP) Directive and the growing levels of machine automation are leading to the increased use of variable speed drives, even in comparatively simple applications. In many of these applications, however, particularly those involving pumps and fans, VSDs offer too much complexity and functionality, but ordinary motor starters provide no control over speed. Our new VSSs are the ideal solution for these applications where only limited functionality is needed, as they are very simple to use, yet they offer full speed control."

Eaton's VSSs are also a valuable new option to ensure standards compliance in constant-speed applications where IE2 motors have to be used as IE3 motors cannot be physically accommodated. Other applications where VSSs provide significant benefits include those involving very high start frequencies and those where there is a high thermal load on the motor.

Eaton is currently offering PowerXL DE1 VSSs in two sizes; the 45mm wide slim-line version is suitable for use with motors up to 1.5kW, while the 90mm wide model can be used with motors from 2.2 to 7.5kW. Both models have internal motor protection functions as well as motor thermistor and short-circuit protection.

Easy to install and commission by non-specialists

No specialist knowledge is needed to install, commission and use the new VSSs, as they have been designed for straightforward 'out of the box' operation without the need for adjustments or parameter setting. This means that they require up to 80 per cent less commissioning time than conventional VSDs.

Eaton PowerXL DE1 VSSs have been specifically designed to provide maximum availability. They offer, for example, trip-free operation that detects regenerative energy fed back from the motor and automatically allows for this. They also provide a DC braking function prior to start up, which is particularly useful in fan applications, and they have the ability to reduce switching frequency to ensure that critical device temperatures are not exceeded. An automatic restart function ensures continuous motor operation after a fault.

Optional parameter configuration

While the standard settings will be suitable in the vast majority of cases, for special applications Eaton offers a universal plug-in configuration tool that enables key parameters, including ramp time, motor protection and terminal arrangement, to be set using no tools other than an ordinary screwdriver. Alternatively, the PowerXL DE1 VSSs can be configured using external keypads with an LED or OLED display and buttons, or the Eaton drives Connect software. Parameters can also be copied from one device to another via Bluetooth.

PowerXL DE1 VSSs have a Modbus interface as standard, and they can be easily integrated with Eaton's innovative SmartWire-DT wiring system, which cuts panel wiring time by up to 70 per cent compared with conventional wiring.

Designed for use in even the most demanding of industrial environments, PowerXL DE1 VSSs have an operating temperature range of -10 to +60degC. They comply fully with CE, UL, cUL and cTick requirements, making them suitable for use worldwide.

Follow the link for more information and to watch a short video about the Variable Speed Starter (VSS).

Eaton

Grimshaw Lane
Middleton
Manchester
M24 1GQ
UNITED KINGDOM

+44 (0)161 655 8900

UKCommorders@eaton.com

www.uk.eaton.com

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