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

© Siemens 2020
Introduction
General information
■ Overview
Note:
For transport, the bare parts are coated with anti-corrosion paint
which will last for a limited amount of time.
Colors and paint finish
Additional identification code -Z with order code
Standard version 8) S00 9) S01 8) S02 S03 8) 10) S04 8) S05 S06 8) 10) 11)
Suitability for recoating 7)
Pre-treatment of parts
Drying
Top coat colors
Standard version
Available colors
Can be recoated within 1 week
All parts cleaned and degreased, steel and cast-iron parts sandblasted
All layers oven-dried
RAL 7030 (stone gray)
Alternative standard and special RAL colors must be ordered with order code Y53 or Y56 and specification in plain
text of the required RAL number (see tables for order codes Y53 and Y56 on the following page for selection of available
RAL numbers/RAL colors).
S06 is available only in standard RAL 7030
Treatment of bare metal areas of shaft extensions and flanges
Coated with anti-corrosion agent that repels water and palm sweat
1
1) Machined laminated rotor core, shaft, inner diameter of cast-iron housing,
interior surfaces of cast-iron bearing plates.
2) Total film thickness:
- The specified film thickness represents average values for the external
motor surfaces
- Unpainted or one layer of paint (30 µm) less beneath the fan cover
- The film thickness may differ at inaccessible locations (pockets/recesses
or bases of ribs)
The film thickness specified for aluminum/cast-iron versions refers not only
to motors, but also to components such as the bearing plate and housing.
Motors are also available in an aluminum/cast-iron composite design.
3) The paint coat can become electrostatically charged where there is a thick
film. Electrostatic discharges can occur. There is a risk of explosion if
potentially explosive mixtures are also present at this moment. This can
result in death, serious injury or material damage. When painted surfaces
are recoated, one of the following conditions must be fulfilled:
• Limit the total paint film thickness according to the explosion protection
group:
- IIA, IIB: Total paint film thickness 2mm
- IIC: Total paint film thickness 0.2 mm for motors of group II (gas)
• Limit the surface resistance of the paint used:
- Surface resistance 1G for motors of groups II and III (gas and dust)
• Charge transfer limit:
- 60 nC for Group I or Group IIA devices
- 25 nC for Group IIB devices
- 10 nC for Group IIC devices
- 200 nC for Group III devices
• Breakdown voltage 4 kV for explosion group III (dust only)
Note:
Paints for IIC with film thickness exceeding 200 µm are optionally available.
Paints with film thickness exceeding 200 µm have been tested for
electrostatic charging. Motors with a coating thickness exceeding
200 µm may only be painted over if the conditions mentioned above are
complied with.
4) Aluminum motors/components without a paint finish already meet the
requirements for corrosivity class C2. It is not therefore necessary to apply
paint to components that are not visible. The paint finish is therefore
applied only for the purpose of coloring.
5) Aluminum motors with cast-iron components (e.g. DE bearing plate) have a
primer coat of > 30 µm on cast-iron components.
6) 50 µm zinc galvanized layer + 120 µm paint film thickness.
7) Primers, water-based 2-K epoxy resin paints and polyurethane-based
paints can be overpainted with paints of the same kind if the motors are in
the original packaging and are still covered by the warranty. A suitability
test should be conducted before any recoating work is undertaken if the
customer intends to use a coating of a different kind to overpaint the motor.
Alternatively, a test in accordance with EN ISO 16927 "Determination of the
overcoatability and recoatability of a coating" can be requested and
ordered.
8) For SIMOTICS XP cast-iron motors that are suitable for operation in dust
hazardous areas, some color restrictions apply to conductive paints.
9) Not permitted for SIMOTICS XP cast-iron motors that are suitable for operation
in dust hazardous areas.
10) For SIMOTICS XP aluminum motors that are suitable for operation in dust
hazardous areas, some color restrictions apply to conductive paints.
11) For SIMOTICS XP cast-iron motors that are suitable for operation in gas
hazardous areas, some color restrictions apply to conductive paints.
Siemens D 81.1 · 06/2020
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