Electrical supply device for a discharge lamp comprising ballast shielding

An electrical supply device for a discharge lamp of a motor vehicle headlight that comprises:

• an electronic module for converting source electric current into supply electric current for the discharge lamp;
• a housing that encloses said electronic module that comprises an electrically conductive material so as to form electromagnetic shielding;
• an electrical connection harness that is intended to electrically connect said electronic module with the discharge lamp;
• a shielding envelope comprising an electrically conductive material that surrounds said electrical connection harness so as to form electromagnetic shielding;
• said housing and said shielding envelope being electrically connected to a common reference electrical potential (−);
• wherein said housing and said shielding envelope are connected in parallel to said common reference electrical potential (−);
• wherein said shielding envelope is connected to said common reference electrical potential (−) by means of a contact element made of an electrically conductive material having better electrical conductivity than the material used for producing said housing;
• wherein said contact element is produced from a material containing copper;
• wherein said housing comprises:
• a first reciprocal connector electrically connected to a said common reference electrical potential (−) is intended to be engaged mechanically in a connected position;
• a second reciprocal connector of a connection harness is intended to be engaged mechanically in a connected position, said second reciprocal connector being surrounded by said shielding envelope of said connection harness;
• the first reciprocal connector being arranged adjacent to said second reciprocal connector;
• and
• a contact element is arranged so as to electrically connect said common reference electrical potential (−) to said shielding envelope when said first and second reciprocal connectors simultaneously are in their connected position.

An electrical supply device for a discharge lamp of a motor vehicle headlight comprising:

• a ballast, said ballast having an electrically conductive housing;
• an electrical conductive harness coupling said ballast to the discharge lamp, said electrical conductive harness comprising an electrically conductive envelope surrounding said electrical conductive harness;
• and
• said electrically conductive envelope and said electrically conductive housing being connected in parallel to a common reference electrical potential;
• a first reciprocal connector electrically connected to said common reference electrical potential is intended to be engaged mechanically in a connected position;
• a second reciprocal connector of a connection harness is intended to be engaged mechanically in a connected position, said second reciprocal connector being surrounded by said electrically conductive envelope of said connection harness;
• the first reciprocal connector being arranged adjacent to said second reciprocal connector;
• and
• a contact element is arranged so as to electrically connect said common reference electrical potential to said electrically conductive envelope when said first and second reciprocal connectors simultaneously are in their connected position.