IEC 60721-3-2:2018/COR2:2022

 IEC 2022
INTERNATIONAL ELECTROTECHNICAL COMMISSION
COMMISSION ÉLECTROTECHNIQUE INTERNATIONALE
____________
IEC 60721-3-2 IEC 60721-3-2
Edition 3.0  2018-02 Édition 3.0  2018-02

CLASSIFICATION OF ENVIRONMENTAL CLASSIFICATION DES CONDITIONS
CONDITIONS – D’ENVIRONNEMENT –

Part 3-2: Classification of groups of Partie 3-2: Classification des groupements des
environmental parameters agents d’environnement
and their severities – et de leurs sévérités –
Transportation and handling Transport et manutention

CO RRI G E NDUM 2
Corrections to the French version appear after the English text.
Les corrections à la version française sont données après le texte anglais.

5.6 M Mechanical conditions
Replace the existing Table 5 with the following new Table 5:
Table 5 − Classification of mechanical conditions
Class
Environmental
Unit
parameter
2M4 2M5 2M6
a) Stationary
vibration, random:
2 2 2)
acceleration power (m/s ) /Hz 10 1,0 0,5 30 3,0 1 10 5
spectral density
1)
frequency range Hz 2 to 3 10 to 20 50 to 2 000 2 to 3 10 to 20 50 to 2 000 5 to 200 500 to 2 000

b) Non-stationary
vibration including
3)
shock:
4)
Shock 1
Figure 2 Curve 4 Figure 2 Curve 3 Figure 2 Curve 3
(equivalent to a half sine (equivalent to a half sine (equivalent to a half sine
2 2 2
pulse of 100 m/s and pulse of 300 m/s and pulse of 300 m/s and
11 ms duration) 11 ms duration) 11 ms duration)
Figure 2 Curve 2 Figure 2 Curve 1 Figure 2 Curve 1
(equivalent to a half sine (equivalent to a half sine (equivalent to a half sine
4)
Shock 2
2 2 2
pulse of 300 m/s and 6 ms pulse of 1 000 m/s and pulse of 1 000 m/s and
duration) 6 ms duration) 6 ms duration)
IEC 60721-3-2:2018-02/COR2:2022-06(en-fr)

– 2 – IEC 60721-3-2:2018/COR2:2022
 IEC 2022
c) Free fall:
mass less than m 0,25 1,2 1,5
20 kg
mass 20 kg to
m 0,25 1,0 1,2
100 kg
mass more than
m 0,1 0,25 0,5
100 kg
d) Toppling:
mass less than None Toppling around any of the Toppling around any of the Toppling around any of the
20 kg edges edges edges
mass 20 kg to None No Toppling around any of the Toppling around any of the
100 kg edges edges
mass more than
None No No Toppling around any of the
100 kg
edges
e) Rolling, pitching:
5)
angle Degrees No ±35 ±35
period None No 8 8
f) Steady-state
m/s 20 20 20
acceleration
g) Static load kPa 5 10 10
1)
When transport only occurs by rail, river, sea and road, the upper frequency considered may be reduced to 500 Hz for
products that are not sensitive to vibration excitations above 500 Hz.
2)
The low frequency stationary vibration random component arises from the influence of land vehicle suspension systems.
The component is included for design purposes but is not always included in vibration test specifications.
3)
For land vehicles, these shocks can occur simultaneously with the stationary vibration random conditions.
4)
Both shocks would normally be used to encompass different aspects of the shock environment.
5)
An angle of 35° may only occur temporarily. An angle of up to 22,5° can be reached for long periods of time.

Figure 2 – Consolidation of mechanical conditions
Delete the existing top figure and retain the existing bottom figure only, as shown:

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