Scope of application
This series of products is suitable for waterproof, fireproof, explosion-proof and direct burial withstand voltage protection of cold and hot shrink intermediate joints of cross-linked polyethylene insulated power cable with a nominal cross-section of 50 to 630mm².
Product performance
The stainless steel explosion-proof box is divided into upper and lower parts, which has the features of easy installation, high strength and good sealing performance. The product shell is made of 304# stainless steel, which has special prevention functions for a variety of corrosive medium, and has the characteristics of fire resistance, heat insulation, anti-knock property, etc.. The shell has a good expansion rate and strong withstand voltage property, that can withstand strong impact from the inside or outside, and meets the requirements of coastal areas, chemical sites and long-term direct burial underground.
Performance indicators
Experimental projects
Inspection site
Inspection content
Judgement
Standard
Vertical combustion test
Shell
1）The temperature raised in the furnace△t=29.3℃
2）Quality loss rate△m=3%
3）Continuous burning time t1=0
4）Total calorific value PCS=1.2MJ/kg,burning level complies with A.
Qualified
GB/T2408-2008
article 9
Seal gasket
Spline: length 125mm, width 13mm, thickness 2mm, chamfer radius 1.1mm;
According to Article 9 of GB/T 5169.16-2008, the combustion level of the vertical combustion test is V-0, so the combustion performance level conforms to B1.
Impact resistance
Shell
To withstand the impact force caused by a 1kg weight falling vertically from a height of 2 meters, the box body should be free of damage and cracks.
Qualified
GB3836.1-2010
article 26.4.2
Flexural resistance strength
Shell
R=127MPa, no fracture deformation phenomenon.
Qualified
GB23864-2009
article 6.5
Salt water resistance
The whole machine
The specimen is cut into three 20mm*20mm*20mm specimens and soaked in 3% sodium chloride solution. The temperature is maintained at 20±5 °C, and there is no swelling and no cracking after 3 days. The box keeps integral. There is no obvious change in the inner and outer surfaces, no breakage and peeling between layers.
Qualified
GB23864-2009
article 6.8
Acid resistance
The whole machine
The specimen is cut into three 20mm*20mm*20mm specimens and soaked in 3% hydrochloric acid solution. The temperature is maintained at 20±5 °C, and there is no swelling and no cracking after 3 days. The box keeps integral. There is no obvious change in the inner and outer surfaces, no breakage and peeling between layers.
Qualified
GB23864-2009
article 6.12
Alkali resistance
The whole machine
The specimen is cut into three 20mm*20mm*20mm specimens and soaked in 3% aqueous ammonia solution. The temperature is maintained at 20±5 °C, and there is no swelling and no cracking after 3 days. The box keeps integral. There is no obvious change in the inner and outer surfaces, no breakage and peeling between layers.
Qualified
GB23864-2009
article 6.13
Short circuit current test
(explosion-proof performance)
The whole machine
After deflagration through the 15kV internal electrical short circuit of 1S, no explosives splashed out and the surface of the cable placed on both sides is not damaged. The explosion-proof box can withstand the pressure impact generated during the experiment, and the overall integrity remains intact after the test, no two pieces of detachment phenomenon, no obvious damage and melting phenomenon on the surface.
Qualified
Overall dimensions
unit:mm
Product Model
Length*Inside Diameter*Caliber*Wall Thickness
Scope of Application
DS-FBH(SS)-1
900*φ180*φ120mm-1.5
10kV single core
DS-FBH(SS)-2
1400*φ180*φ120mm-1.5
10kV three cores or 35kV single core
DS-FBH(SS)-3
1600*φ180*φ120mm-1.5
10kV three cores or 35kV single core
DS-FBH(SS)-4
1600*φ200*φ130mm-1.5
10kV three cores or 35kV single core
DS-FBH(SS)-5
1800*φ200*φ120mm-1.5
35kV three cores
The cross-sectional area is 120-240mm².
DS-FBH(SS)-6
1800*φ200*φ130mm-1.5
35kV three cores
The cross-sectional area is 300-400mm².
DS-FBH(SS)-7
1800*φ250*φ130mm-1.5
35kV three cores
The cross-sectional area is 300-400mm².
DS-FBH(SS)-8
2100*φ250*φ150mm-1.5
35kV three cores
The cross-sectional area is more than 400mm².
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