American Rotary AMP 10 User Manual - Page 15
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Print Page8.0 IMPORTANT TERMS
TRANSFORMER
A piece of electrical equipment that is used to increase or decrease electrical voltage .
DISCONNECT
A mechanical switch that is used to break a connection between an electrical wire or line to provide isolation
from the power source to a device .
CIRCUIT BREAKER
Commonly referred to as a breaker, is an automatically operated electrical switch which will protect an electrical
circuit from damage caused by excess current generally caused by an overload or short circuit on the line .
Breakers are available in different sizes all based on the applications .
LOAD CENTER
A panel that is used to house multiple breakers which will also serve the purpose of providing power distribution
and isolation for the machine loads .
ELECTRIC GENERATOR/IDLER
The rotary portion of the phase converter that is custom designed to produce the manufactured leg of a three-
phase system that is powered from a single-phase system .
CONTROL PANEL
The main panel as part of the three-phase converter . This is where all of the electrical connections are made,
where the phase converter is turned on and off, and the panel that houses the start and run circuits for the
phase converter .
CAPACITOR
Stores electrical energy to assist with start loads and voltage balancing . An American Rotary phase converter
will have two sets of capacitors, each serving a separate purpose . You will have start capacitors and run
capacitors . Start capacitors are only engaged during the starting of the converter and during the start-up of the
load whereas the run capacitors are engaged at all times when the converter is running .
CONTACTOR
An electrically controlled or magnetically controlled switch used to engage an electrical circuit . This is used
simply to complete an electrical connection and should not be considered a disconnect .
GROUND
Provides an alternate route for electrical current to flow back to ground or Earth in the event of a problem in the
wiring system .
DELTA POWER
In simple terms in reference to a three-phase system, it would be a four-wire system (three hot wires and a
ground) . With a delta system, the power is connected in a triangle . When measuring a delta system leg to
ground you will end up with a high leg . Delta systems should always be measured leg to leg when checking for
voltage balance as you will get similar readings leg to leg .
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