The present invention relates to a transformer with a coil body accommodating at least one primary coil and one secondary coil. It is the object of the present invention to provide a transformer which, using the smallest possible amount of high-grade insulation material, ensures good insulation while remaining compact and easily assembled. The object is achieved by a transformer of the above type which is characterized in that the coil body comprises at least one primary part, accommodating the primary coil, and one secondary part, accommodating the secondary coil, and wherein at least one section of the primary part can be covered by at least one section of the secondary part. This section of the secondary part performs the function of the fire-protection housing for the primary part of the transformer.
1. A transformer, comprising:
at least one AC contact pin for contacting a mains voltage; and
a coil body accommodating at least one primary coil and one secondary coil, wherein the coil body comprises at least one primary part accommodating the primary coil and one secondary part accommodating the secondary coil and wherein at least a region of the primary coil of the primary part is coverable by a least one section of the secondary part, wherein the secondary part includes a fire-protection material which is a plastic material of the fire-protection class UL94-V1 or better, wherein a connection region of the primary part is electrically connected to the at least one AC contact pin at an intersection, and wherein said intersection is covered by an associated insulation part which forms part of the secondary part.
2. The transformer according to claim 1 , wherein the primary part and the secondary part are designed as two separable parts.
3. The transformer according to the claim 1 , wherein said at least one section of the secondary part has an internal diameter which is greater than an external diameter of said at least one coverable section of the primary part.
4. The transformer according to claim 1 , wherein the primary part is connected to the at least one contact pin via a one-way plug connection.
5. The transformer according to claim 4 , wherein the one-way plug connection has at least one locking element which engages the primary part in a connection region from behind.
6. The transformer according to claim 1 , wherein said at least one contact pin has an insulated sheath region.
7. The transformer according to claim 1 , wherein the connection region comprises a connection tab, and wherein the associated insulation part covers substantially an entire length of the connection tab.
8. The transformer according to claim 1 , further comprising a housing that at least partially encompasses the at least one AC contact pin and the coil body, wherein the housing comprises a material of a fire-protection class that is lower than the fire-protection class of the plastic material of the secondary part.
9. The transformer according to claim 1 , wherein said associated insulation part at least partially covers the at least one AC contact pin.
10. The transformer according to claim 1 , wherein the primary part comprises a primary spool for accommodating the primary coil and wherein the secondary part comprises a secondary spool for accommodating the secondary coil; wherein the secondary spool and secondary coil do not cover the primary spool and primary coil.