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1736/1738
Users Manual
42
Energy
Note
Not available on load studies without a nominal voltage.
Determine the energy consumed/delivered since the logging session
has been started.
The Demand screen shows the values for:
•
Consumed energy (= forward energy) in Wh
•
Maximum Demand in W. Maximum demand is the highest active
power measured over the demand interval and is often part of the
contract with the electricity supplier.
•
Energy cost. The currency can be configured in instrument
settings. See Instrument Settings on page 47 for more information.
PQ Health Overview
The PQ Health Overview is available on 1738 or 1736 with
1736/Upgrade or IEEE 519/Report license. This screen shows a
pass/fail analysis based on limits defined by the power quality
standard EN 50160.
The screen includes the parameters for:
•
Frequency
•
Voltage Variations
•
Voltage Harmonics
•
Unbalance
•
Events
The frequency, unbalance, and events have a single bar. Voltage
variations and voltage harmonics are shown in three bars that depend
on the configured topology.
The length of a bar increases if the related parameter is further away
from its nominal value. The bar turns from green to red if a maximum
allowed tolerance requirement is surpassed. When the standard
defines two limits for a parameter (for example, voltage variations
have a limit for 95 % of the time and limit for 100 % of the time) the bar
changes from green to orange when the parameter surpasses the 95
% limit but does not exceed the 100 % limit. For more information go
to
and search for the white paper,
Measurement Methods.
Parameter
Forward/Reverse
Energy
Total
Energy
Active Energy (Wh) +/+ +
Apparent Energy (VAh) -/- +
Reactive Energy (varh) -/- +
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