LB - Loadbreak.
Lightning - An atmospheric electrical
phenomenon associated with thunderstorms; a surge on a
system that results from energy being impressed on the
system.
Liquid-Filled Transformer -
A transformer in which the core and coil are immersed in
a liquid which acts as both a cooling and insulating
medium.
Limit Switch - A switch
that is operated by some part or motion of a power-driven
machine or equipment to alter the electric circuit
associated with the machine or equipment.
Livefront - Apparatus with
bus work and connections exposed to the operator.
Load - The load of a
transformer is the power, in kVA or volt-amperes,
supplied by the transformer. Lagging Load: inductive type
load. Leading Load: capacitive load.
Load Curve - A curve
showing instantaneous demand (kVA or MVA) versus time.
Curves are usually plotted for one day or one week.
Integrating the load curve will provide the amount of
energy consumed.
Load Factor - Represents
how efficiently the electrical system capacity is being
used. The higher the load factor the higher the
efficiency.
Load Switching -
Transferring the load from one source to another.
Loadbreak - The ability of
a switching device to disconnect a load current without
damage.
Loadmake - The ability of a
switching device to connect to a specific load current
without damage.
LV - Low Voltage, CPS's low
voltage automatic resetting fault indicator, utilizing
secondary voltage; usually used in conjunction with an
elbow terminator in a padmount transformer.
LVDA - Low Voltage
Distribution Arrester.