Technical data

7
98
Manual – Gear Units and Gearmotors
Mechanical characteristics (→ GM, → MM)
Project Planning for AC Motors
7.7 Mechanical characteristics (→ GM, → MM)
Degrees of pro-
tection accord-
ing to EN 60034
(IEC 60034-5)
The standard degree of protection for AC motors, AC brake motors and MOVIMOT
®
drives is IP54. Enclosures IP55, IP56, IP65 or IP66 are available upon request.
Other options Increased corrosion protection for metal parts and additional impregnation of the
winding (protection against moisture and acid) is available as is the supply of explosion-
proof motors and brake motors with EExe enclosure (increased safety), EExed
(increased safety motor, flameproof brake) and EExd (flameproof). Refer to the informa-
tion in in Sec. "Product Description and Overview of Types/General information" in this
regard. Contact SEW-EURODRIVE for availability.
Vibration
properties of
motors
The rotors of AC motors are dynamically balanced with a half key. Motors according to
vibration severity grade "N" according to DIN ISO 2373 (EN60034-14:1997) or vibration
grade "A" according to IEC 60034-14:2003. In the case of specific requirements on the
mechanical running smoothness, single-speed motors without brake, forced cooling fan,
encoder, etc. are available in low-vibration design vibration class "R" according to
DIN ISO 2373 or vibration grade "B" according to IEC 60034-14:2003.
GM
MM
IP
1st digit 2nd digit
Touch guard
Protection against foreign
objects
Protection against water
0 No protection No protection No protection
1
Protected against access to
hazardous parts with the back
of your hand
Protection against solid foreign
objects ∅50 mm and larger
Protection against dripping
water
2
Protected against access to
hazardous parts with a finger
Protection against solid foreign
objects ∅12 mm and larger
Protection against dripping
water when tilted up to 15°
3
Protected against access to
hazardous parts with a tool
Protection against solid foreign
objects ∅2.5 mm and larger
Protection against spraying
water
4
Protected against access to
hazardous parts with a wire
Protection against solid foreign
objects ∅1 mm and larger
Protection against splashing
water
5 Protection against dust Protection against water jets
6 Dust-proof
Protection against powerful
water jets
7 --
Protection against temporary
immersion in water
8 --
Protection against permanent
immersion in water