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Water spray test apparatus , IEC 62368-1 Annex Y.5.3 Water spray test
Y.5.3 Water spray test
The water-spray test apparatus, using fresh water, is to consist of
three spray heads mounted in a water supply pipe rack as shown
in Figure Y.2. Spray heads are to be constructed in accordance
with the details shown in Figure Y.3. The outdoor enclosure is to
be positioned in the focal area of the spray heads so that the
greatest quantity of water is likely to enter the outdoor
enclosure. The water pressure is to be maintained at 34,5 kPa at
each spray head. The outdoor enclosure is to be exposed to the
water spray for 1 h.
Unless the construction is such that a test on one side of the
outdoor enclosure is representative of a test on another side,
the test is to be repeated on other sides of the outdoor
enclosure as necessary.
The water spray is to produce a uniform spray over the surface or
surfaces under test. The various vertical surfaces of an
outdoor enclosure may be tested separately or
collectively, provided that a uniform spray is applied.
The top surface of the outdoor enclosure shall be tested by
applying a uniform spray from nozzles located at proper
heights (see the focal point in Figure Y.2), if
– there are openings in the top surface; or
– from an examination of the construction, it is determined that
run-off from the top surface could cause water ingress at a
vertical surface which would not be detected by the test
of the vertical surface.
If there are openings in a vertical surface, located less than 250
mm above ground level, such that water ingress from rain
bouncing upwards from the ground surface might occur, a
test shall be performed, spraying water on the ground surface
in front of such openings, over such distance necessary to
cause the deflected spray to reach the outdoor enclosure. This test
is not carried out if, from an examination of the
construction, it is determined that the test of the vertical
surface adequately assures compliance.
Water-spray test spray head