No need for switch cabinets for this new series of protected drives
07 December 2009
Lenze has expanded its frequency inverter platform to include an IP65 protected version.
Gerhard Wurzrainer shows the 8400 and 8400 protec
The new “decentralised” drive comes in power ranges from 0.75 to 4 kW, and is suitable for horizontal and vertical applications in the automotive, beverage and printing industries as well as in logistics. They also come with an integrated safety system.
Drive manufacturers are finding their customers are increasingly taking into consideration the advantages in moving motor drives outside the cabinet and closer to the motor. These include shorter motor cables, improved EMC, lower power losses, flexible installation directly in the process and reduced costs for the control cabinet and cooling.
Lenze’s new drive is called the “8400 protec.” The drives must be, of course, more robust to operate outside the cabinet and for this reason feature IP65 protection.
And by the time Hannover Fair 2010 comes around, the company will have a version with even more rugged protection—so much so, it will be able to mount directly on the motor.
For these outside-the-cabinet drives, the cable connections must also be robust, so they feature completely pluggable connections.
Integrated safety systems such as PROFIsafe, are included, along with simple on-site diagnostics thanks to a large display and LEDs.
Like the 8400 series of inverters, which is designed strictly for use inside control cabinets, the 8400 protec is functionally scalable from simple to intelligent with the StateLine and HighLine extensions.
The handling features like connections, operator controls, tools and parameterisation, are the same for decentralised and centralised inverters.
And, like the centralised inverters of the platform, the 8400 protec has a plug-in memory module where the parameters are stored. After being plugged in and switched on, 8400 protec is ready for operation immediately – without any manual programming.
The same applies to the replacement of an inverter: the central memory unit only has to be plugged in and then the equipment is ready for use.
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