Motors-D81.1-complete-English-06-2020

© Siemens 2020
Introduction
Electrical design
Degrees of protection
1 ■ Overview
All motors are designed to IP55 degree of protection. They can
be installed in dusty or humid environments. The motors are suitable
for operation in tropical climates. Guide value < 60 % relative
air humidity at CT 40 °C. Other requirements are available on
request (see table on page 1/28).
Brief explanation of the degree of protection
IP54:
• Protection against harmful dust deposits
• Protected against spray water
IP55:
• Protection against harmful dust deposits
• Protection against water jets from any direction
IP56:
• Protection against harmful dust deposits
• Protection against powerful water jets from any direction
Order code H22
Important: Note that submersion by waves or total immersion,
even temporarily, is not permitted especially in the case of motors
with fans. This corresponds to IP67 or IP68 degree of protection
(please inquire).
EN 60034-5 defines protection level 6 for water protection as:
"Protection against water due to heavy seas or water in a powerful
jet". IP56 degree of protection can only be used with the requirement
"Protection against a powerful jet" and not for the
requirement "Protection against heavy sea".
Not possible in combination with brake BFK458 (order
code F01).
IP65:
• Complete protection against dust deposits
• Protection against water jets from any direction
Order code H20
In EN 60034-5, the code 6 for protection against the ingress of
foreign bodies and touch hazard protection for electrical machines
is not listed – Data for code 6 (protection against the ingress
of dust) is given in EN 60529.
Not possible in combination with HOG 9 DN 1024 I rotary pulse
encoder (order code G05) and/or brake BFK458 (order code
F01) and/or paint finish, cast-iron parts primed (order code
S00).
EN 60529 contains a comprehensive description of this degree
of protection as well as test conditions.
With motors that have a vertical shaft extension, the end user
must prevent an ingress of fluid along the shaft.
For motors with shaft extension pointing downwards, the version
"Protective cover for types of construction" order code H00 is urgently
recommended, see also the explanations on "Types of
construction" on page 1/45.
With flange-mounted motors, for IM V3 type of construction, collection
of fluid in the flange basin can be prevented by drainage
holes (on request).
The condensation drainage holes at the drive end (DE) and nondrive
end (NDE) are sealed (IP55) on delivery. If the condensation
drainage holes are ordered for motors of the IM B6, IM B7 or
IM B8 type of construction (feet on side or top), the position of
the drainage holes will be in the correct position for the type of
construction.
Order code H03
1/44 Siemens D 81.1 · 06/2020