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Used as insulation mostly between windings and as an outer wrap. They are not necessarily connected together.

IN-889B – Flow Transmitter:

Each material give the core distinctly different magnetic properties. Electrical grade Insulating paper. This strengthens the leadouts and protects against accidental access or damage to the higher voltage windings.

To seal a transformer in a coffin using epoxy or other resin. Composite moulded construction of compressed ferrite granules. Any taps are shown at intermediate figures.

Winding wire having TWO layers of protective enamel coating higher electrical insulation. TAP An intermediate point in a winding brought out for termination.

Page 26 – NZ_Components_Catalogue

Winding wire having only ONE layer of protective enamel winding coating lower electrical insulation. Most possible faults but not all will show up as a higher than expected current. Means connecting an internal 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.

Refers to mylar sheet insulation inserted between the bobbin and laminations,to provide increased insulation, where: A magnetic core consisting of a circular ring of iron powder, ferrite, steel or other material.


Usually used to describe layer winding — but ieonel be Useful for bobbin winding to estimate winding progress.

Layer winding as opposed to jumble winding is done by using a manufactured former and winding successive layers in such a way that: A walled former with a central hole sized to fit a specific lamination type and stack.

The actual ieonel properties of this paper are not high. Means tubular PVC or woven fibre placed around the winding wire for isohel protection and insulation. Once heated to this temperature, the fuse becomes useless and the transformer must be replaced or rewound. Similar properties to steel laminations but having a magnetic circuit that is more suitable for higher frequencies. 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. Means filling the specified bobbin side-slots usually high SIDE-SLOTS voltage or primary side with a isonep opaque mixture of epoxy resin after final assembly and varnishing.

TPL is the number of turns of wire including enamel insulation calculated to fit into one layer. Usually nominated as a thickness —eg.

On winding isinel this will also include core type or any reference to the type of magnetic circuit. Also known as spaghetti. Used in situations where high temperatures would prevent use of normal insulations. A protective fuse wound-into or placed on top of a winding, usually the primary. Any variations of this will be specified. There can also be electrical advantages to encapsulating. Tongue is one dimension of the interior rectangle, stack total thickness is the other.

Other grades used include H50, etc. Exiting self-leads for termination are twisted over themselves several times to strengthen wire and prevent breakage. Thickness of each is 0. Core made up of magnetic materials composed of oxides containing ferric ions as their main constituent.


Grain Oriented steel which is typically 0.

Page 25 – Catalogue

Usually is the first winding, but may be split in two or in rare cases be the final winding. 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. SHUNTS Lamination material arranged with appropriate insulation to vary and control the magnetic circuit of the transformer. This allows for a JUMBLE type winding that is always contained and insulated from the laminations by the bobbin walls.

Can also get Grade III. Thicknesses normally available range from 0.

isonel datasheet & applicatoin notes – Datasheet Archive

Polyester Thermosetting Tape which is the standard in the industry for use in transformers. Lamination material arranged with appropriate insulation to vary and control the magnetic circuit of the transformer. An identifiable feature on a bobbin that is used as a DATUM for the orientation of terminations and windings, etc. Sizes normally available are 0. A container into which a transformer is inserted for sealing and mounting in a resin.

Absorbent thin brown paper used normally to stabilise and separate the layers in small high voltage transformers. 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 isondl movement or vibration.