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E154713
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Glossary
Quadrant
(Programmable Values and
Factors on the Nexus
®
meter:)
Watt and VAR flow is typically represented using
an X-Y coordinate system. The four corners of the
X-Y plane are referred to as quadrants. Most
power applications label the right hand corner as
the first quadrant and number the remaining
quadrants in a counter-clockwise rotation. Follow-
ing are the positions of the quadrants:
1st - upper right, 2nd - upper left, 3rd - lower left
and 4th - lower right.
Power flow is generally positive in quadrants 1
and 4.
VAR flow is positive in quadrants 1 and 2.
The most common load conditions are:
Quadrant 1 - power flow positive, VAR flow
positive, inductive load, lagging or positive
power factor;
Quadrant 2 - power flow negative, VAR flow
positive, capacitive load, leading or negative
power factor.
Register:
An entry or record that stores a small amount of
data.
Register Rollover:
A point at which a Register reaches its maximum
value and rolls over to zero.
Reset:
Logs are cleared or new (or default) values are
sent to counters or timers.
Rolling Window
The Rolling (Sliding) Window Average is the
Average (Power):
average power calculated over a user-set time
interval that is derived from a specified number of
sub-intervals, each of a specified time. For
Summary of Contents for Shark 100T
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