Page 115 - Louth Transformer Catalogue

LT DATA

GLOSSARY

A process in which a transformer is completely sealed with epoxy or similar
ENCAPSULATION material. This process is usually used when a unit might encounter harsh
environmental conditions.

The current drawn by a transformer at nominal input voltage in its unloaded
EXCITING CURRENT
(open-circuit) condition.
Resonance resulting when the iron core of an inductive component of an LC
FERRORESONANCE circuit is saturated, increasing the inductive resistance with respect to the
capacitance resistance.

FERRORESONANT A voltage regulating transformer that depends on core saturation and output
TRANSFORMER capacitance.

A selective network of resistors, inductors or capacitors which offers
FILTER comparatively little opposition to certain frequencies or direct current, whilst
blocking or attenuating other frequencies.

a protective device, gG types are sued for resistive loads and aM types are used
FUSE
for inductive loads.

A term often used to describe the quality of the transformer core. It is also known
GRAIN as M6 material. A more expensive, low loss lamination. it can be used to reduce
temperature or where space may be limited.

Total opposition of a component or circuit to the flow of an alternating or
IMPEDANCE
varying current. (Symbol Z).
The ability of a coil to store energy and oppose changes in current flowing
INDUCTANCE through it. A function of the cross sectional area, number of turns, length of coil
and core material. Measured in Henrys. (Symbol L).

A coiled conductor that opposes changes in current. Can be very similar in
INDUCTOR
appearance to a transformer.

INRUSH CURRENT A brief and momentary surge of current through the transformer, due to residual
flux, experienced as the transformer is energised.

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