American Rotary AMP 208-240V User Manual - Page 16

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WYE POWER

In simple terms in reference to a three-phase system, it would be a five-wire system (three hot wires, a neutral

wire, and a ground wire) . A wye connection utilizes a star connection . Measuring voltage on a wye system will

give you around 120v to ground on all three hot legs or between 208-240v when measuring between hot legs .

NEMA TYPE 1

This is an indoor rated enclosure that is providing protection to the equipment inside from typical indoor

contaminates such as dirt or other solid falling objects .

NEMA TYPE 3R

This is an outdoor rated enclosure that is providing protection to the equipment inside from falling rain, sleet,

snow and external ice formation . With an American Rotary Type 3R enclosure, the access door is also equipped

with a gasket for an extra layer of protection .

TEFC

Stands for Totally Enclosed Fan Cooled . This is a type of electric generator enclosure that does not allow outside

air to circulate through the interior of the generator . Instead, it uses an externally mounted fan that blows air

over the frame to cool it . With this enclosure, you can mount the electric generator/idler outdoor without the

need for an additional enclosure around it .

IDLER JUNCTION BOX

Also referred to as the J-Box . This is the box on the side or top of the electric generator/idler where the wire

connection points are made . The junction box has a knockout where you can run the wires through and

secure using a wire clamp or compression connectors . The front of the junction box will open to allow the wire

connections to be made .

INSULATING WIRE CONNECTIONS

This is the process of covering any wire connection points that are typically using metal with a non-conductive

material . This process typically utilizes the use of rubber mastic tape, heat shrink tubing, or standard electrical

tape .

CURRENT

The rate of which electricity travels through a set point .

REGENERATIVE CURRENT

Extra current or ghost current that is created when there are motors on a system . They can add current back

into the line which can cause an amp meter to give an inaccurate reading and read higher than the actual

amount of current being utilized .

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