Specifications

106
Step-up Transformer A transformer with fewer turns of wire in its primary coil than in
its secondary coil. The step-up transformer is used to step up the
primary voltage to a higher secondary voltage.
1:2
120 VAC
I = 10 amps
Primary Coil
900 Turns
Secondary Coil
1800 Turns
V
load
= 240 VAC
I
load
= 5 amps
Load
= =
Primary Turns
Secondary Turns
Primary Voltage
Secondary Voltage Primary Current
Secondary Current
Surge An increase of at least ten percent in current and voltage that
typically lasts only a few microseconds.
Surge Protection Device A device designed to provide a degree of protection for
(SPD) electrical equipment from the damaging effects of a surge.
Switchboard A large panel or assembly of panels containing switches,
overcurrent protective devices, buses, and associated
instruments. Unlike panelboards, switchboards sometimes must
be mounted away from a wall to allow access to rear-mounted
equipment.
Switchgear A coordinated design consisting of switching and interrupting
devices and associated equipment such as control and protective
devices and metering.
Dan
ger