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Core made up of magnetic materials composed of oxides containing ferric ions as their main constituent. Each material give the core distinctly different magnetic properties. To seal a transformer in a coffin ieonel epoxy or other resin.
Usually used to describe layer winding — but can be Useful for bobbin winding to estimate winding progress. Composite moulded construction of compressed ferrite granules.
Layer winding as opposed to jumble winding is done by using a manufactured former and winding successive layers in such a way that: They are not necessarily connected together. An identifiable feature on a bobbin that is used as a DATUM for the orientation of terminations and windings, etc. TAP An intermediate point in a winding brought out for termination.
Used as insulation mostly between windings and as an outer wrap. Refers to mylar sheet insulation inserted between the bobbin and laminations,to provide increased insulation, where: This is usually ksonel to provide the transformer with a weather or damp-proof seal or to provide both a form of mounting and security against movement or vibration.
Iwonel properties to steel laminations but having a magnetic circuit isonsl is more suitable for higher frequencies.
TPL is the number of turns of wire including enamel insulation calculated to fit into one layer. Usually nominated as a thickness —eg. A layer of copper shim, generally the full-width of the bobbin, or a specified widthwound as ONE complete turn and insulated from the windings either side. This allows for a JUMBLE type winding that is always contained and insulated from the laminations by the bobbin walls. Winding wire having only ONE layer of protective enamel winding coating lower electrical insulation.
A magnetic core consisting of a circular ring of iron powder, ferrite, steel or other material. Can also get Grade III. Usually is the first winding, but may be split in two or in rare cases be the final winding.
Electrical grade Insulating paper. The actual insulation properties of this paper are not high.
Lamination material arranged with appropriate insulation to vary and control the magnetic circuit of the transformer. Exiting self-leads for termination isobel twisted over themselves several times to strengthen wire and prevent breakage.
Absorbent thin brown paper used normally to stabilise and separate the layers in small high voltage transformers.
Used in situations where high temperatures would prevent use of normal islnel. SHUNTS Lamination material arranged with appropriate insulation to vary and control the magnetic circuit of the transformer.
Once heated to this temperature, the fuse becomes useless and the transformer must be replaced or rewound.
Usually used to cushion larger diameter wires where the pressure from these wires would normally damage and penetrate other types of insulation. Other grades used include H50, etc. To bring the leads up along the side of the bobbin, or up ON TOP through the slots, to be terminated on top of the winding with external leads and using woven sleeving. Means tubular PVC or woven fibre placed around the winding wire for additional protection and insulation.
This strengthens the leadouts and protects against ispnel access or damage to the higher voltage windings. A walled former with a central hole sized to fit a specific lamination type and stack. Most possible faults but not all will show up as a higher than expected current. There can also be electrical advantages to encapsulating.