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Composite moulded construction of compressed ferrite granules. Usually used to describe layer winding — but can be Useful for bobbin winding to estimate winding progress. Other grades used include H50, etc.

Page 26 – NZ_Components_Catalogue

Standard size of a lamination eg. Used as insulation mostly between windings and as an outer wrap. Electrical grade Insulating paper. Any variations of this will be specified. SHUNTS Lamination material arranged with appropriate insulation to vary and control the magnetic circuit of the transformer.

Sizes normally available are 0. Thickness of each is 0. On winding sheets this will also include core type or any reference to the type of magnetic circuit. Usually used to cushion larger diameter wires where the pressure from these wires would normally damage and penetrate other types of ieonel.

Layer winding as opposed to jumble winding is done by using a manufactured former and winding successive layers in such a way that: A container into which a transformer is inserted for sealing and mounting in a resin. Core made up of magnetic materials composed of oxides containing ferric ions as their main constituent.


Means connecting an internal winding wire, either to a PCB bobbin pin or to another more flexible lead that can safely exit the transformer. A protective fuse wound-into or placed on top of a winding, usually the primary.

This strengthens the leadouts and protects against accidental access or damage to the higher voltage windings. Also known as spaghetti. 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.

Each material give the core distinctly different magnetic properties. To seal a transformer in a coffin using epoxy or other resin. Once heated to this temperature, the fuse becomes useless and the transformer must be replaced or rewound.

There can also be electrical advantages to encapsulating.

IN-889B – Flow Transmitter:

Any taps are shown at intermediate figures. Most possible faults but not all will show up as a higher than expected current. Thicknesses normally available range from 0. Used in situations where high temperatures would prevent use of normal insulations. An identifiable feature on a bobbin that is used as a DATUM for the orientation of terminations and windings, etc.

Exiting self-leads for termination are twisted over themselves several times to strengthen wire and prevent breakage. A walled former with a central hole sized to fit a specific lamination type and stack.

Usually is the first winding, but may be split in two or in rare cases be the final winding. Winding wire having TWO layers of protective enamel coating higher electrical insulation.


To bring the leads up along the side of the bobbin, or up ON TOP 64 the slots, to be terminated on top of the winding with external leads and using woven sleeving.

A magnetic core consisting of a circular ring of iron powder, ferrite, steel or other material. Tongue is one dimension of the interior rectangle, isondl total thickness is the other. They are not necessarily connected together. TPL is the number of turns of wire including enamel insulation calculated to fit into one layer. 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. Means tubular PVC or woven fibre placed around the winding wire for additional ieonel and insulation.

Can also get Grade III. Lamination material arranged with appropriate insulation to vary and control the magnetic circuit of the transformer. Polyester Thermosetting Tape which is the standard in the industry for use in transformers.

Usually nominated as a thickness —eg. Similar properties to steel laminations but having a magnetic circuit that is more suitable for higher frequencies. The actual insulation properties of this paper are not high. Refers to mylar sheet insulation inserted between the bobbin and laminations,to provide increased insulation, where: TAP An intermediate point in a winding brought out for termination.