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< Back to listRB-JT119Medium voltage cable joints automatic anti-arc explosion extinguishing box

RB-JT119

Medium voltage cable joints automatic anti-arc explosion extinguishing box

Product specifications：

Height 190mm, length 950mm (optional extension accessories extend to 1400mm)

Product introduction：

lt is applied to intermediate joint of medium voltage cable to prevent arcing breakdown, explosion shockwave damage and flame flame spread when two-phase short-circuit explosion occurs after single-phaseground-loss ignition or single-phase ground-loss caused by joint fault, in order to protect the adjacentmany other cables, to avoid expanding the scope of the accident and avoid indirect injury.

Consulting products

Product Features
Technical Parameters
Application scenarios
Installation Notes

1.Anti-arc:external stainless steel layer + high temperature insulation anti-arc layer inside,can withstand 10K4,0.6 s short-circuit arc energy explosionimpact
2.Anti-explosion, pressure relief, fire: inovative design along both sides of the cable pressure relief chanel to release explosion shock wave andarcing high-temperature fame,to avoid injury to the surrounding cable, to ensure the integrity of the shell after the explosion and fire; The inside ofthe box body and two ends are provided with fire-proof expansion materials to prevent fire spreading
3.Automatic fire-fighting: built-in automatic fire-fighting module, can be in 2s fast, efficient fire-fighting
4.Intermediate head temperature rise:ater the installation of the device, intermediate head temperature rise after the stable temperature than beforethe installation, temperature rise≤3℃
5.Durability:the product seal is reliable, corrosion resistance, high temperature resistance, pressure resistance, service life≥10 years

	Performance indicators	Typical values
1	Explosion-proof performance short circuit arc test (10KA,0.6s)	After the test，no cracks and holes were found in the shell. The sample can beextinguished automatically within 1 min after ignition. The other 2 cables placed around the sample have no obvious damage.
2	High current temperature rise test	After the installation of the device, the stable temperature of the intermediatehead after heating is compared with that before the installation of the device,andthe stable temperature of the intermediate head after heating is compared with that before the installation of the device, Temperature Rise≤3℃
3	Impact test	The metal shell can bear the impact energy of 7J without damage.
4	Dielectric strength test for insulation	Applied 21KV voltage between phase and ground,lasted 60S,no breakdown
5	Fire fighting performance	The built-in module can kill the head within 2s after the injection
6	Fire response temperature	160~180℃
7	Electrical insulation of fire extinguishing agent gas	0.8~0.9×10¹⁰Ω?m

Anti-arc, anti-explosion and active self-extinguishing fire of intermediate joint of 6 ~ 35kV (25 ~ 400mm2) cables

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RB-JT119

Medium voltage cable joints automatic anti-arc explosion extinguishing box