Degree Of Protection; Degree Of Protection For Explosion-Proof Machines - Siemens SIMOTICS XP Series Operating Instructions Manual

Basic type of construc-
tion code
IM B35 (IM 2001)
IM B34 (IM 2101)
Types of construction/Installation conditions for explosion-proof machines
The type of construction of the machine is stated on the rating plate.
In the case of explosion-proof machines where the shaft extensions point downwards (types
of construction IM V5, IM V1 or IM V18 ) a protective top cover is mandatory. Explosion-
proof machines with IM V5, IM V1 and IM V18 types of construction are fitted with a canopy
at the factory.
Table 3- 4
3.3.7

Degree of protection

The machine has a type of protection as stamped on the rating plate, and can be installed in
dusty or humid environments.
3.3.7.1

Degree of protection for explosion-proof machines

Machines intended for use in Zone 1 (increased safety "e" or "eb") or in Zone 2 (type of
protection "nA" or "ec") are designed with an IP55 degree of protection.
Machines intended for use in Zone 21 (dust explosion protection "tb") and Group IIIC have IP
65 degree of protection. Machines intended for use in Zone 22 (dust explosion protection
"tc") and Group IIIB have IP 55 degree of protection and can be used in dusty environments
such as in mills, silos, animal feed plants, and malthouses, as well as in certain areas of the
chemical industry.
1MB..1/2/3/4 - shaft heights 63 ... 355
Operating Instructions, 06/2020, A5E44455710A
Diagram
Construction type with protective top cover
Conditions of installation
IM V5 (IM 1011)
IM V1 (IM 3011)
IM V18 (IM 3611)
Graphics-Based Representation
Description
3.3 Installation
27