SIST EN 60721-3-3:2001/A2:2001

SLOVENSKI STANDARD
SIST EN 60721-3-3:2001/A2:2001
01-september-2001
Classification of environmental conditions - Part 3: Classification of groups of
environmental parameters and their severities - Section 3: Stationary use at
weatherprotected locations
Classification of environmental conditions -- Part 3: Classification of groups of
environmental parameters and their severities -- Section 3: Stationary use at
weatherprotected locations
Klassifizierung von Umweltbedingungen -- Teil 3: Klassen von Umwelteinflußgrößen und
deren Grenzwerte -- Hauptabschnitt 3: Ortsfester Einsatz, wettergeschützt
Classification des conditions d'environnement -- Partie 3: Classification des groupements
des agents d'environnement et de leurs sévérités -- Section 3: Utilisation à poste fixe,
protégé contre les intempéries
Ta slovenski standard je istoveten z: EN 60721-3-3:1995/A2:1997
ICS:
19.040 Preskušanje v zvezi z Environmental testing
okoljem
SIST EN 60721-3-3:2001/A2:2001 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 60721-3-3:2001/A2:2001

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SIST EN 60721-3-3:2001/A2:2001

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SIST EN 60721-3-3:2001/A2:2001

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SIST EN 60721-3-3:2001/A2:2001
NORME
CEI
INTERNATIONALE
IEC
721-3-3
INTERNATIONAL
1994
STANDARD
AMENDEMENT 2
AMENDMENT 2
1996-11
Amendement 2
Classification des conditions d’environnement –
Partie 3:
Classification des groupements des agents
d’environnement et de leurs sévérités –
Section 3: Utilisation à poste fixe, protégé
contre les intempéries
Amendment 2
Classification of environmental conditions –
Part 3:
Classification of groups of environmental
parameters and their severities
Section 3: Stationary use at weatherprotected
locations
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SIST EN 60721-3-3:2001/A2:2001
721-3-3 Amend. 2  IEC:1996 − 3 −
FOREWORD
This amendment has been prepared by IEC technical committee 75: Classification of environ-
mental conditions.
The text of this amendment is based on the following documents:
FDIS Report on voting
75/279/FDIS 75/289/RVD
Full information on the voting for the approval of this amendment can be found in the report on
voting indicated in the above table.
____________
Page 15
5.1  Climatic conditions
Add, after the first paragraph, the following new paragraph:
Climatic conditions in tropical areas as specified in classes 3K9 and 3K10 are explained in
annex E.
Page 19
Table 1 − Classification of climatic conditions
Add columns 3K9 and 3K10 as follows (columns “Environmental parameter” and “Unit” are
repeated for information only):
Environmental parameter Unit Class
8) 8)
3K9 3K10
a) Low air temperature °C +5 −20
5)
°C +40 +55
b) High air temperature
c) Low relative humidity % 30 4
d) High relative humidity % 100 100
3
e) Low absolute humidity 60,9
g/m
3
f) High absolute humidity 36 27
g/m
1)
°C/min 1,0 1,0
g) Rate of change of temperature
7)
kPa 70 70
h) Low air pressure
2)
kPa 106 106
i) High air pressure
2
j) Solar radiation 1120 1120
W/m
6) 6)
k) Heat radiation None
4) 5) 5)
m/s
l) Movement of surrounding air 5,0 5,0
m) Condensation None Yes Yes
n) Wind-driven precipitation (rain, snow, None Yes Yes
hail, etc.)
6) 6)
o) Water from sources other than rain None
p) Formation of ice None No Yes
Add note 8:
8) Further information on classes 3K9 (tropical damp) and 3K10 (tropical dry) is given in annex E.

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SIST EN 60721-3-3:2001/A2:2001
721-3-3 Amend. 2  IEC:1996 − 5 −
Page 31
A.2.1  K Climatic conditions
The new classes 3K9 and 3K10 will be inserted in the table in a future revision.
Page 51
A.3.1  K Climatic conditions
Add, on page 53, the following descriptions of new classes, after the descriptions of classes
3K6, 3K7 and 3K8:
3K9 Class 3K9 represents the conditions covered by the Warm Damp and Warm Damp
Equable types of Open-Air Climate (tropical damp type of climate, in areas with
tropical rainforests).
3K10 Class 3K10 represents the conditions covered by the Warm Dry, Mild Warm Dry and
Extremely Warm Dry types of Open-Air Climate (tropical dry type of climate, in areas
near the tropics such as deserts).
Page 79
Add the following new annex E:
Annex E
(informative)
Explanation of the environmental conditions in tropical areas
as specified in classes 3K9 and 3K10
E.1  General
The tropics are the areas within the Northern and Southe
...