Siemens SIMOTICS SD Operating Instructions Manual page 134

Glossary
Internet
www.siemens.com/motors
IP
Degree of protection
ISPM
International Standards for Phytosanitary Measures
N code
Balanced without featherkey (non2)
NDE
Non-drive end
NE/NDE
Non-drive end
SH
Shaft height
UL
Underwriters Laboratories
VIK
Verband der industriellen Energie- und Kraftwirtschaft e.V. (German Association of Industrial
Energy Users and Self-Generators)
Zone 1
Atmosphere: Gas; Danger level: Occasional danger; Type of protection: Increased Safety "e"
+ Flameproof Enclosure "d"
Zone 2
Atmosphere: Gas; Danger level: Infrequent and short-term danger; Type of protection: Non-
sparking "n"
Zone 21
Atmosphere: Dust; Danger level: Occasional danger; Type of protection: Protection by
enclosure "t"; device protection level "Db"
Zone 22
Atmosphere: Dust; Danger level: Infrequent and short-term danger; Type of protection:
Protection by enclosure "t"; device protection level "Dc"
134
Operating Instructions, 05/2014, 5 610 00000 02 000
Low-voltage motors