IP21
The degree of protection of the standard drive cabinet is IP21 (UL type 1). With doors open,
the degree of protection of the standard cabinet and all cabinet options is IP20. The live
parts inside the cabinet are protected against contact with clear plastic shrouds or metallic
gratings.
IP42 (option +B054)
This option provides the degree of protection of IP42 (UL type 1 Filtered). The air inlet
gratings are covered with a metallic mesh between the inner metallic grating and the outer
plastic grating.
IP54 (option +B055)
This option provides the degree of protection of IP54 (UL type 12). It provides the cabinet
air inlets with filter housings containing folded board air filter mats between the inner metallic
grating and the outer plastic grating. An additional fan on the cabinet roof is included.
￭ UL listed (option +C129)
The option includes factory inspection of the cabinet according to UL 508C and the following
accessories and features:
• US type main switch fuse
• US cable conduit entry (plain plate without ready-made holes)
• all components UL Listed/Recognized
• maximum supply voltage 480 V.
Related options: +H351 (top entry of cables), +H353 (top exit of cables) and +H358 (cable
conduit entry)
￭ Plinth height (options +C164 and +C179)
The standard height of the cabinet plinth is 50 mm. These options specify a plinth height of
100 mm (+C164) or 200 mm (+C179).
￭ Empty cubicles (options +C196 to +C201)
Note:
This option is available for US only.
These options add an empty cubicle to the drive cabinet: The cubicle is equipped with blank
power cable entries both at the top and the bottom.
• on the right-hand side of the converter cubicle (400 mm wide with option +C196, 600
mm wide with option +C197 and 800 mm wide with option +C198)
• on the left-hand side of the converter cubicle (400 mm wide with option +C199, 600 mm
wide with option +C200 and 800 mm wide with option +C201).
￭ du/dt filter (option +E205)
The du/dt filter protects the motor insulating system by reducing the voltage rise speed at
the motor terminals. The filter also protects the motor bearings by reducing the bearing
currents.
More information on when the option is required: See section Examining the compatibility
of the motor and drive (page 64).
Operation principle and hardware description 45
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