IEC 60721-3-2: 1997IEC 60721-3-1: 1997IEC 60721-3-3:
2002:
Classification of envir-
onmental conditions
- Part 3-3: Classifica-
tion of groups of en-
vironmental paramet-
ers and their severit-
ies - Stationary use
of weather protected
locations
Contamination levels
(IEC 60721-3-x)
Class 2C2Class 1C2Class 3C2Chemical gases
Class 2S2Class 1S3 (packing
must support this,
otherwise 1S2)
Class 3S2. No con-
ductive dust allowed.
Solid particles
--Pollution degree 2Pollution degree
(IEC/EN 60664-1)
60…106 kPa
0.6…1.05 atmo-
spheres
70…106 kPa
0.7…1.05 atmo-
spheres
70…106 kPa
0.7…1.05 atmo-
spheres
Atmospheric pressure
--Max. 1 mm (0.04 in)
(5…13.2 Hz), max.
7 m/s
2
(23 ft/s
2
)
(13.2…100 Hz) sinus-
oidal
Vibration(IEC 60068-2)
R1…R4 (ISTA 1A): Displacement, 25 mm
peak to peak, 14200 vibratory impacts
-Vibration(ISTA)
R5…R9 ISTA 3E): Random, overall Grms
level of 0.52
R1…R4 (ISTA 1A): Drop, 6 faces, 3 edges
and 1 corner
Not allowedShock/Drop (ISTA)
inmmWeight range
29.97600…10 kg (0…22 lb)
24.061010…19 kg (22…42 lb)
18.146019…28 kg (42…62 lb)
13.434028…41 kg (62…90 lb)
R5…R9 (ISTA 3E): Shock, incline impact:
1.1 m/s (3.61 ft/s)
Shock, rotational edge drop: 200 mm
(7.9 in)
1)
For symmetrically grounded TN-S systems, TT systems, and ungrounded or symmetrically high-resistance
grounded IT systems. See also section Limiting relay output maximum voltages at high installation
altitudes (page 110).
2)
For corner-grounded delta systems, midpoint-grounded delta systems and corner-grounded (via high resistance)
IT systems.
Technical data 301
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