Operation principle and hardware description 37
Descriptions of cabinet options
Note: All options are not available for all drive types, do not coexist with certain other
options, or may require additional engineering. Check actual availability with ABB.
Degree of protection
Definitions
According to IEC/EN 60529, the degree of protection is indicated by an IP code where the
first numeral means protection against ingress of solid foreign objects, and the second
numeral protection against ingress of water. The IP codes of the standard cabinet and
options covered in this manual are defined below.
* meaning for protection of persons: against access to hazardous parts with finger
IP22 (standard)
The degree of protection of the standard drive cabinet is IP22. The air outlets at the top of
the cabinet are covered with a brass grating. The air inlet gratings are covered with plastic
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 (option +B054)
This option provides the degree of protection of IP42. The air inlet gratings are covered
with a metallic mesh between the inner metallic grating and the outer plastic grating.
IP54 (pending)
This option provides the degree of protection of IP54. 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.
Cabinet heater with external supply (option +G300)
The option contains:
• heating elements in the cubicles
• load switch for providing electrical isolation during service
• miniature circuit breaker for overcurrent protection
• terminal block for external power supply.
The heater prevents humidity condensation inside the cabinet when the drive is not
running. The power output of the semiconductor-type heating elements depends on the
environmental temperature. The customer must switch the heating off when it is not
needed by cutting the supply voltage off.
The customer must supply the heater from an external 110…240 V AC power source.
IP code The equipment is protected …
First numeral Second numeral
IP22 against ingress of solid foreign objects >
12.5 mm diameter *
against dripping (15° tilting) water
IP42 against ingress of solid foreign objects >
1 mm against dripping (15° tilting) water
IP54 dust-protected against splashing water
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