IP22 (UL Type 1)
The degree of protection of the standard drive cabinet is IP22 (UL type 1). The air outlets
at the top of the cabinet and the air inlet gratings are covered with metallic gratings. 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 (UL Type 1 Filtered) (option +B054)
This option provides the degree of protection of IP42 (UL type 1). The air inlet gratings are
covered with a metallic mesh between the inner and outer metallic gratings.
IP54 (UL Type 12) (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 and
outer metallic gratings. An additional fan and filtered outlets on the cabinet roof are also
included.
￭ Marine construction (option +C121)
The option includes the following accessories and features:
• reinforced mechanics
• grab railings
• door flush bolt which allows the door to open 90 degrees and prevents it from slamming
close
• self-extinctive materials
• flat bars at base of the cabinet for fastening
• fastening brackets at the top of the cabinet.
Additional wire markings may be required for classification. See section Wire
markings (page 53).
￭ Cooling air intake through bottom of cabinet (option +C128)
See section Air inlet through the bottom of cabinet (option +C128) (page 82).
￭ UL Listed (option +C129)
The cabinet contains the following accessories and features:
• all components UL/CSA Listed/Recognized
• maximum supply voltage 600 V
• US-type main switch and fuses.
￭ Channeled air outlet (option +C130)
This option provides a collar for connection to an air outlet duct. The collar is located on the
cabinet roof. Depending on the equipment installed in each cubicle, the channeled air outlet
either replaces, or adds to, the standard roof arrangement.
With option +B055, this option also provides the cabinet air inlets with filter housings
containing folded board air filter mats between the inner and outer metallic gratings.
See also section Air outlet duct on the cabinet roof (option +C130) (page 83).
50 Operation principle and hardware description
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