12.5mm test probe for the DIN 40050 or IEC 60529

IEC 60529 describes a system for classifying the degrees of protection provided by the enclosures of electrical equipment. Whilst this system is suitable for use with most types of electrical equipment, it should not be assumed that all the listed degrees of protection are applicable to a particular type of equipment. The manufacturer of the equipment should be consulted to determine the degrees of protection available and the parts of equipment to which the stated degree of protection applies.

The adoption of this classification system, wherever possible, will promote uniformity in methods of describing the protection provided by the enclosure and in the tests to prove the various degrees of protection. It should also reduce the number of types of test devices necessary to test a wide range of products.

This second edition of IEC 60529 take 3 account of exparioncoa with tho firat odition, and clarifies the requirements. It provides for an optional extension of the IP Code by an additional letter A, B, C, or D if the actual protection of persons against access to hazardous parts is higher than that indicated by the first characteristic numeral.
In general, enclosures with an IP coding to the first edition would be eligible for the same code according to this edition.

SMT IP20C_AL

14.2.5 Test for second characteristic numeral 5 with the 6.3 mm nozzle
The test is made by spraying the enclosure from all practicable directions with a stream of water from a standard test nozzle as shown in figure 6.
The conditions to be observed are as follows:
-internal diameter of the nozzle: 6.3 mm;
-delivery rate: 12.5 l/min±5%;
-water pressure: to be adjusted to achieve the specified delivery rate;
-core of the substantialstream: circle of approximately 40 mm diameter at 2.5 m distance from nozzle;
-test duration per square metre of enclosure surface area likely to be sprayed:1min;
-minimum test duration: 3 min;|
-distance from nozzle to enclosure surface: between 2.5 m and 3 m.

14.2.6 Test for second characteristic numeral 6 with the 12.5 mm nozzle
The test is made by spraying the enclosure from all practicable directions with a stream of water from a standard test nozzle as shown in figure 6.
The conditions to be observed are as follows:
-internal diameter of the nozzle: 12.5 mm;
-delivery rate: 100 l/min ± 5 %;
-water pressure: to be adjusted to achieve the specified delivery rate;
-core of the substantial stream: circle of approximately 120 mm diameter at 2.5 m distance from nozzle;
-test duration per square metre of enclosure surface area likely to be sprayed:1 min;
-minimum test duration: 3 min;
-distance from nozzle to enclosure surface: between 2.5 m and 3 m.

DIN 40050 or IEC 60529 12.5mm test probe for household appliance against electric shock protection test

14.2.7 Test for second characteristic numeral 7: temporary immersion between 0.15 m and 1 m
The test is made by completely immersing the enclosure in water in its service position as specified by the manufacturer so that the following conditions are satisfied:

a)the lowest point of enclosures with a height less than 850 mm is located 1 000 mm below the surface of the water;
b) the highest point of enclosures with a height equal to or greater than 850 mm is located 150 mm below the surface of the water;
c) the duration of the test is 30 min;
d) the water temperature does not differ from that of the equipment by more than 5 K.
However, a modified requirement may be specified in the relevant product standard if the tests are to be made when the equipment is energized and/or its parts in motion.

14.2.8 Test for second characteristic numeral 8: continuous immersion subject to agreement on
Unless there is a relevant product standard, the test conditions are subject to agreement between manufacturer and user, but they shall be more severe than those prescribed in 14.2.7 and they shall take account of the condition that the enclosure will be continuously immersed in actual use.

14.2.9 Test for second characteristic numeral 9 by high pressure and temperature water jetting
The test is made by spraying the enclosure with a stream of water from a standard test nozzle as shown in Figures 7,8 and 9. The set-up for measuring the impact force of the water jet is given in Figure 10. The distribution force shall be verified at upper and lower limits of distance tolerance range (see Figure 11).
a) For small enclosures (largest dimension less than 250 mm), the enclosure shall be mounted on the test device shown in Figure 12.
-turntable speed: 5r/min±1r/min spray positions: 0°, 30*,60*,90°
The test duration is 30 s per position.

b) For large enclosures (largest dimension greater than or equal to 250 mm), the enclosure shall be mounted as per intended use. The entire exposed surface area of the enclosure shall be subjected to the spray at some point during the test procedure.
– spray positions: the enclosure shall be sprayed from all practical directions covering the entire surface area and the spray shall be, as far as possible, perpendicular to the
sprayed surface.
– distance between nozzle and sample under test shall be 175±25mm.
The test duration is 1 min/m²of the calculated surface area of the enclosure (excluding any mounting surface), with a minimum duration of 3 min.

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