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Electrical Theory & Applications for HVACR
Glossary
Page 135
Kirchoff’s Voltage Law
in any current loop of a circuit, the sum of the voltage drops is equal to the voltage supplied to that
loop
kV
abbreviaƟon for kilovolt
kVA
abbreviaƟon for kilovolt amps
kVAh
abbreviaƟon for kilovolt amp hour
kW
abbreviaƟon for kilowaƩ
kWh
abbreviaƟon for kilowaƩ hour
kilo‐
prefix meaning one thousand
L
L
symbol for inductance measured in Henrys
L1
incoming power supply line
L1‐L2
incoming power supply lines
L1, L2, L3
incoming three‐phase power supply lines
ladder diagram
a circuit diagram drawn in the form of a verƟcal ladder
Law of MagneƟsm
unlike poles of a magnet aƩract and like poles repel
Lenz’s Law
the induced counter electromoƟve force in a circuit will always be in a direcƟon that opposes the
voltage that produces it