Waterpoof Junction Box Protection Against Electric Shock And Leakage Protection
Edit: Zhejiang Kangge Electric Co.,Ltd     Date: 2017/9/27    Browse: 5814

     Waterproof performance is an important indicator of the performance of the Waterpoof Junction Box. Certification test, the first aging pretreatment test, and then anti-flushing test, and then through the appearance of structural inspection and frequency withstand voltage test to judge. The test can pass smoothly, depending on the degree of sealing protection of the Waterpoof Junction Box, and the seal protection of the Waterpoof Junction Box directly affects the protection of the finished component and the level of protection against leakage. With regard to the conventional construction of the Waterpoof Junction Box, its design and material defects have been revealed in the certification test no doubt.

      The main phenomena of the failure of the Waterpoof Junction Box anti-flushing test are roughly divided into the following:
      ⑴, Waterpoof Junction Box sealed box body a lot of water;
      ⑵, Waterpoof Junction Box box and the backplane material does not match;
      ⑶, the Waterpoof Junction Box seal nut cracking failure;
      ⑷, the Waterpoof Junction Box in the aging pretreatment test box deformation;
      ⑸, the Waterpoof Junction Box seal ring aging pretreatment test failure, or other reasons.

      Through the analysis of the failure phenomenon in the above test process, the following reasons are obtained: (1) The locking design of the box: The design of the buckle is the main reason for the failure of the test. Two buckle mode makes the cover force concentrated in two points, plus a large area of the lid, resulting in the rest of the force is very uneven. Especially at high temperatures, the rest of the points by the thermal expansion of the ring, the material heat to soften the impact, resulting in the Waterpoof Junction Box mouth, affecting the box of the seal, which failed in the IP65 waterproof test.

      (2) improper selection of rubber material for Waterpoof Junction Box seals:
      Due to the choice of sealing material is not suitable, in the Waterpoof Junction Box after 240 hours aging pretreatment test, its elongation and shrinkage decreased, the sealing material hardness increases, reducing the box and the lid of the sealing performance, resulting in sealing Can not completely seal the box and the cover of the slot, resulting in water infiltration, anti-flushing test failed.

      (3) Waterpoof Junction Box box Plastic and solar module sealant After aging pretreatment test, the adhesive fails.

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