EN 50286-1999 pdf download.Electrical insulating protective clothing for low-voltage installations.
5.2.5 Water-vapour resistance
The conditioning and the test shall be carried out according to EN 31092.
If the clothing consists of several layers all layers shall be tested together.
The test is passed if the requirements of 4.1.5 are met.
5.2.6 Water penetration
The test shall be carried out according to EN 20811.
If the clothing consists of several layers all layers shall be tested together.
The test is passed if the requirements of 4.1.6 are met.
5.2.7 Dimensional change due to laundering andlor cleaning
No conditioning is required.
The test procedure for dimensional change for washing shall be carried out in accordance with ISO 5077 and for dry-cleaning In accordance with ISO 3175.
One test piece shall be subjected to five washing procedures according to ISO 6330 or dry-cleaning processes according to ISO 3175. If both washing and dry-cleaning is permitted the test piece shall only be washed.
The test is passed if the requirements of 4.t7 are met.
5.3 Electrical tests
5.3.1 General
Test arrangements, power sources and procedures shall be in accordance with HD588.1 Si.
Electrical type tests shall be performed on test pieces. Type tests are destructive.
For the test, nine circular test pieces measuring 170 mm in diameter shall be cut from the jacket, trousers or overall, and at least one shall be cut from the hood. Three of the test pieces shall have seams, One test piece with a seam shall undergo the proof voltage test (dry), one the proof voltage test after conditioning In moisture atmosphere and one the proof voltage test after rain
For electrical tests the alternating voltage of a voltage source, the output power of which shall be at least I 000 VA, shall be initially applied at a low-voltage up to 500 V and gradually increased at a constant rate-of-rise of approximately 1 000 V/s until the voltage specified in the relevant subclauses is reached or failure occurs.
The test is performed with the following arrangement (see Figure 1):
A pLastic pipe with an inner diameter of (50 ± 2) mm and a height of (10 ± 1) mm equipped with two recess for the seam shall be placed centrally on the test piece and be filled with stainless steel pellets 01(3,5 ± 0,6) mm diameter in such a way that the plastic pipe lies in the horizontal plane and no pellet can fall out. The pellet filling shall be conductrvely connected to one pole of the power source.
A grounded metal electrode with 75 mm diameter shall be placed coaxially below the test piece and shall be connected to the other pole of the power source.
For type and sampling tests the voltage shall be applied continuously for 3 mm. Herewith the proof test current shall be measured
5.3.2.1 Proof test under dry conditions
The test shall be carried out on conditioned test pieces.
A voltage of 2,5 kV (mis) shall be applied to three test pieces, one of them shall have a seam, and the current shall be measured
The test is passed if no puncture or flashover occurs and the proof test current does not exceed 0,2 mA.
5.3.2.2 Proof test under moisture conditions
The test shall be carried out on conditioned test pieces. Storing for 4.8 h at an ambient temperature of (23 ± 2) C and a relative humidity between 91 % and 95 % shall be regarded as conditioning.
The test shall be carried out within I mm after the removal of the test piece from the conditioning atmosphere.
A voltage of 2 kV (rms) shall be applied to three test pieces (one of them shall have a seam) and the proof test current shall be measured.
The test is passed if no puncture or flashover occurs and the proof test current does not exceed 0,5 mA.
5.3.2.3 Proof test after rain
Three test pieces (one of them shall have a seam) shall be put over the upper opening of a cup with an inner diameter of 100 mm and a height of 500 mm and then be fastened with a sealing ring (e.g. rubber) at the upper opening in such a way that the inner side of the test pieces remains dry. The edge of the cup shall be rounded to have a minimum radius of(3 ± I) mm
Subsequently rain simulated by an oscillating tube shall be maintained for 10 mm according to EN 60529 subclause 14.2.3 Table VIII and Figure 4. The water resistivity shall be In accordance with HD 588.1 SI.
A voltage of 1.5 kV (rms) shall be applied immediately after rain to the test pieces for 3 mm and the proof test current shall be measured.EN 50286-1999 pdf download.