ERL tesla lite, User Manual, Page: 109 / 288

8 Configuring the Recorder
D03283R01.10 TESLA LITE User Manual 8-31
Settings
Figure 8.18: Watts/Vars Channel Configuration Screen
Table 8.13: Watts/Vars Channel Settings
Element Identifies the group to which this channel belongs. The Element forms
the first part of the channel name. The Element is selected when the
channel is created and is fixed once assigned when you are working
in the Element Tree view.
Description Optional field (12 characters). Provides an additional description of
the channel that forms part of the channel name. Use if Element
Name and channel Type do not sufficiently identify the channel.
(“Channel Grouping and Naming” on page 8-7).
Watts/Vars Index Identifies the watts/vars channel. Unlike the analog and external input
channels, this is not associated with a hardware input, but simply
identifies which of the internal virtual watts/vars channels will be used.
You can select any available channel without restriction. If the only
option is “undefined”, you have already used all available channels.
Voltage Input Identifies the voltage channels to be used to create the watts and
vars. These can be either analog input channels, summations or posi-
tive sequences. If you select analog or summation channels as inputs,
single phase watts and vars will be calculated; if you select sequence
channels, three-phase watts and vars will be calculated.
Current Input Identifies the current channels to be used to create the watts and
vars. These can be either analog input channels, summations or posi-
tive sequences. If you select analog or summation channels as inputs,
single phase watts and vars will be calculated; if you select sequence
channels, three-phase watts and vars will be calculated.
Trigger Settings
Watts 1, Watts 2,
Watts 3 Period of time over which both positive and negative rate of change
for each Watts Detector is measured. 0.5 to 8.0 cycles.
Vars Period of time over which both positive and negative rate of change
for Var Detector is measured. 0.5 to 8.0 cycles.