Page 117 - Louth Transformer Catalogue

LT DATA

GLOSSARY

(PF) A capacitive or inductive circuit condition that results in the applied current
POWER FACTOR
leading or lagging the applied voltage.

The winding that is directly connected to the input supply. A transformer can
PRIMARY have more than one primary winding, which can either be connected in series or
parallel.

The addition of all transformer output windings. Normally measured in VA or
RATING
KVA.

RECTIFIER An electrical device used to change AC power into DC power.

Usually expressed as a percentage, between the difference of a winding’s no-load
REGULATION
to full-load. Normally between 0.75 and 1.0.

SECONDARY The winding(s) supplying the output voltage to the load(s).

A low resistance connection, usually accidental, across part of a circuit, resulting
SHORT CIRCUIT in excessive current flow. Some small transformers can be designed as ‘short
circuit proof’. Whose windings will have a high impedance.

A transformer can either step-up or step-down voltage. A step-up transformer is
STEP-UP / STEP-DOWN one in which the output voltage is greater than the input voltage. With a step-
TRANSFORMERS
down transformer, the input voltage is greater than the output voltage.

TEMPERATURE RISE The temperature increase above ambient when the transformer is under
constant load conditions and no further temperature increase is noted.

A doughnut shaped transformer, featuring lower height and lower stray
TOROIDAL
magnetic field.

WYE Refers to a type of three phase transformer connection. Also known as a star
connection.

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