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Any taps are shown at intermediate figures. 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. Thickness of each is 0. Grain Oriented steel which is typically 0. They are not necessarily connected together.

A walled former with a central hole sized to fit a specific lamination type and stack. Composite moulded construction of compressed ferrite granules.

INB – Flow Transmitter – Discontinued | OLD Transmitters | Intech Instruments Ltd

Winding wire having only ONE layer of protective enamel winding coating lower electrical insulation. Absorbent thin brown paper used normally to stabilise and isobel the layers in small high voltage transformers. A protective fuse wound-into or placed on top of a winding, usually the primary. Polyester Thermosetting Tape which is the standard in isoneo industry for use in transformers.

Electrical grade Insulating paper. Tongue is one dimension of the interior rectangle, stack total thickness is the other.

Means connecting an iosnel winding wire, either to a PCB bobbin pin or to another more flexible lead that can safely exit the transformer. 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. Core made up of magnetic materials composed of oxides containing ferric ions as their main constituent. Other grades used include H50, etc. Thicknesses normally available range from 0.


Winding wire having TWO layers of protective enamel coating higher electrical insulation. 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. Refers to mylar sheet insulation inserted between the bobbin and laminations,to provide increased insulation, where: This allows for a JUMBLE type winding that is always contained and insulated from the laminations by the bobbin walls.

On winding sheets this will also include core type or any reference to the type of magnetic circuit. TPL is the number of turns of wire including isoneo insulation calculated to fit into one layer. Any variations of this will be specified. Layer winding as opposed to jumble winding is done by using a manufactured former and winding successive layers in such a way that: Also known as spaghetti.

Can also get Grade III. There can also be electrical advantages to encapsulating.

An identifiable feature on a bobbin that is used as a DATUM for the orientation of terminations and windings, etc. To seal a transformer in a coffin using epoxy or other resin. Used as insulation mostly between windings and as an outer wrap. Each material give the core distinctly different magnetic properties. Most possible faults but not all will show up as a higher than expected current.

Usually used to cushion larger diameter wires where the pressure from these wires would normally damage and penetrate other types of insulation. Standard size of a lamination eg.


Varnishes & Solvents

Exiting self-leads for termination are twisted over themselves several times to strengthen wire and prevent breakage. Lamination material arranged with appropriate insulation to vary and control the magnetic circuit of the transformer. Sizes normally available are 0.

This is usually done 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. Means tubular PVC or woven fibre placed around the winding wire for additional protection and insulation. Similar properties to steel laminations but having a magnetic circuit that is more suitable for higher frequencies. Usually used to describe layer winding — but can be Useful for bobbin winding to estimate winding progress.

Usually is the first winding, but may be split in two or in rare cases be the final winding. The actual insulation properties of this paper are not high. A container into which a transformer is inserted for sealing and mounting in a resin. This strengthens the leadouts and protects against accidental access or damage to the higher voltage windings.

Means filling the specified bobbin side-slots usually high SIDE-SLOTS voltage or primary side with a thickened opaque mixture of epoxy resin after final assembly and varnishing.

A magnetic core consisting of a circular ring of iron powder, ferrite, steel or other material. Used in situations where high temperatures would prevent use of normal insulations. TAP An intermediate point in a winding brought out for termination.

Usually nominated as isknel thickness —eg.