Electrical lead-through for safety tanks
An improved electrical lead-through, particularly for safety tanks, is provided that includes at least one electrical conductor which is guided through a rigid insulation material, wherein a silicone insulation is introduced over at least one segment of the conductor projecting on one side of the insulation material.
1. An electrical lead-through, comprising:
a rigid insulation material having an outer side;
at least one electrical conductor extending through the rigid insulation material to define at least one segment projecting from the outer side;
a silicone insulation ensheathing at least one segment of the at least one electrical conductor, wherein the silicone insulation comprises a silicone elastomer tubing over the at least one segment, and wherein the silicone elastomer tubing is pulled while stretching onto the at least one conductor; and
a cast or potted encapsulation of silicone elastomer on the outer side of the rigid insulation, the encapsulation at least partially covering the silicone elastomer tubing.
2. The electrical lead-through according to claim 1 , wherein the silicone insulation has an outer surface that runs at least partially coaxially to the at least one electrical conductor.
3. The electrical lead-through according to claim 1 , wherein the silicone elastomer tubing has a diameter that is stretched by at least 1 percent as compared to the diameter of the silicone elastomer tubing in a relaxed state.
4. The electrical lead-through according to claim 3 , wherein the silicone elastomer tubing has a hardness of at most 40° Shore A.
5. The electrical lead-through according to claim 3 , wherein the silicone elastomer tubing has a hardness of at most 35° Shore A.
6. The electrical lead-through according to claim 1 , wherein the silicone elastomer tubing has a diameter that is stretched by at least 2 percent as compared to the diameter of the silicone elastomer tubing in a relaxed state.
7. The electrical lead-through according to claim 6 , wherein the silicone elastomer tubing has a hardness of at most 40° Shore A.
8. The electrical lead-through according to claim 6 , wherein the silicone elastomer tubing has a hardness of at most 35° Shore A.
9. The electrical lead-through according to claim 1 , wherein the at least one conductor is fused in a glass insulation.
10. The electrical lead-through according to claim 1 , further comprising a plurality of conductors isolated from one another in a shared insulation material.
11. A method for producing an electrical lead-through, comprising:
fixing at least one conductor in an insulation material in such a way that ends of the at least one conductor project from opposite sides of the insulation material;
ensheathing at least one at least one segment of the conductor projecting from an outer side of the insulation material with a silicone elastomer insulation, wherein the ensheathing step comprises stretching the silicone elastomer insulation over the at least one segment of the conductor, and wherein the silicone elastomer insulation comprises silicone elastomer tubing and the stretching step further comprises pulling the silicone elastomer tubing while stretching onto the conductor; and
coating a silicone elastomer compound onto the outer side of the insulation material, wherein the coating the silicone elastomer compound step further comprises coating, at least partially, the silicone elastomer tubing with the silicone elastomer compound after pulling on the silicone elastomer tubing.
12. The method according to claim 11 , wherein the stretching step comprises stretching a diameter of the silicone elastomer tubing by at least 1 percent as compared to the diameter of the silicone elastomer tubing in a relaxed state.
13. An electrical lead-through, comprising:
a rigid insulation material having an outer side;
at least one electrical conductor extending through the rigid insulation material to define at least one segment projecting from the outer side;
a silicone elastomer tubing ensheathing at least one segment of the at least one electrical conductor, the silicone elastomer tubing having a diameter that is stretched by at least 1 percent with respect to the diameter of the silicone tubing in a relaxed state; and
a cast or potted encapsulation of silicone elastomer on the outer side of the rigid insulation and at least partially covering the silicone elastomer tubing, the encapsulation being applied after the silicone elastomer tubing is stretched on the at least one segment.
14. The electrical lead-through according to claim 13 , wherein the diameter is stretched by at least 2 percent.