TIGHT CABLE ENTRY AND METHOD OF ITS PRODUCTION Russian patent published in 2008 - IPC H01B13/32 

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering and power production, namely, to tight cable entries and can be used for laying cables into tight enclosures at nuclear power stations or other structures. The tight cable entry made up of a metal casing tightened on its both sides by flanges with holes passing insulated electrical conductors representing pigtails with heat resistant mineral insulation in metal sheath is proposed. The said flanges are furnished with bored entries incorporating copper rings soldered therein and passing the cables with mineral insulation, the said cable metal sheath being tightly jointed to the said copper rings by means of the copper-silver solder PSr-72 in a vacuum furnace at 820°C. The proposed method comprises also jointing the said metal flanges to the said cylindrical metal casing after the entries for copper rings have been bored and a copper coating has been deposited.

EFFECT: higher quality and reliability of flange-to-cable sheath, lower labour input in production.

2 cl, 1 dwg