Page 286 - Industrial Power Engineering and Applications Handbook

Philosophy of quality systems and testing of electrical machines 11/265

These tests, however, do not cover special requirements equipment as in Tables 1.10 and 1.11. For other compliance
or environmental conditions such as tests, there may be an agreement between the manufacturer
and the user or a third-party agency, as noted in Section
Explosive areas or 1 1.7, for certifying the use of equipment for hazardous
Unusual service conditions that may cause corrosion, areas.
fungi, etc.
Nore We have discussed the test procedures and tolerances in general
These requirements may require a special construction, terms. For more accurate test methods and tolerances see IEC 60529.
a pressurizing arrangement or more sealings at the joints
to prevent entry of dust or exit of an arc taking place Tests for the first number as in Table 1.10 and
inside the enclosure, or special treatment to the housing IEC 60034-5: protection against contact with live
and larger clearances or creepage distances etc. For more or moving parts
details see Sections 7.14, 7.15, 7.16 and 7.17. Here we
have limited our discussions to the testing of electrical These tests may be carried out as shown in Table 11.7.

Cylindrical
Radius = 2

80
180
@@ dimensions in mrn
All
Section Section
A-A 0-0
Figure 11.7 Standard test finger

Air flow meter

Glass window

l-l-?7u
Circulating pump
L- -
1
Figure 11.8 Apparatus for the verification of protection against dust, according to IEC 60034-5 or 60947-1