Electrical feedthrough with touch protection
An electrical feedthrough for electrically contacting a heat conductor in an exhaust gas guiding device for heating an exhaust gas flow. The heat conductor is located in a housing and at least one electrical conductor designed as a bolt is guided through an opening in the housing and is electrically conductively connected to the heat conductor. The electrical conductor is electrically insulated with respect to the housing and is permanently connected to the housing by a socket. The portion of the electrical conductor outside the housing is enclosed by a touch protection.
1 . An electrical feedthrough configured to electrically contact a heat conductor in an exhaust gas guiding device that heats an exhaust gas flow, wherein the heat conductor is located in a housing comprising:
at least one electrical conductor designed as a bolt and configured to be guided through an opening in the housing and is electrically conductively connected to the heat conductor, wherein the at least one electrical conductor is electrically insulated with respect to the housing and is permanently connected to the housing by a socket; and
a touch protection that encloses a portion of the at least one electrical conductor arranged outside the housing,
wherein the housing has a collar that surrounds the opening in the housing and tapers conically, narrowing along its extension as the collar protrudes from the housing.
2 . The electrical feedthrough as claimed in claim 1 , wherein the at least one electrical conductor is connected to a current-carrying line outside the housing by a connecting element, wherein the collar projects at least partially beyond the connecting element.
3 . The electrical feedthrough as claimed in claim 1 , wherein the touch protection is formed by a lid-like cover element that is slipped over a portion configures as an outer region of the at least one electrical conductor.
4 . The electrical feedthrough as claimed in claim 3 , wherein the lid-like cover element protrudes into the collar projecting from the housing or surrounds it.
5 . The electrical feedthrough as claimed in claim 1 , wherein the housing is assigned to a first electrical potential, wherein the at least one electrical conductor is assigned to a second electrical potential, wherein the touch protection is not assigned to any electrical potential.
6 . The electrical feedthrough as claimed in claim 1 , wherein the touch protection is produced from a metallic grid, a perforated plate or an expanded metal.
7 . The electrical feedthrough as claimed in claim 1 , wherein the touch protection is electrically insulated with respect to the at least one electrical conductor and/or with respect to a current-carrying line and/or with respect to the housing.
8 . The electrical feedthrough as claimed in claim 1 , wherein an opening region of the touch protection facing the housing is closed.
9 . The electrical feedthrough as claimed in claim 3 , wherein a labyrinth-like structure is formed between the collar and the lid-like element.
10 . The electrical feedthrough as claimed in claim 1 , wherein the collar has at least one drainage slot where it meets the housing.
11 . The electrical feedthrough as claimed in claim 1 , wherein the collar has a drip edge at its narrow distal end opposite the housing.
12 . The electrical feedthrough as claimed in claim 2 , wherein a circumferential annular gap of at least 1.5 mm in width remains between the electrical conductor or the connecting element and the collar.