PTE-50-CET
Sheet 36
3. Press the key
. This will produce instantaneously the step from the actual value to the
2
nd
selected value. At the same time there is a signal sent to
Start Chrono
output, to start an
external timer if desired. Furthermore, the LED located above this press key indicates that the
2
nd
value is in the output.
IMPORTANT: When the unit is in this situation the displayed
value cannot be changed even if the rotating knobs are turned.
When this key
is pressed again, the step will be the opposite, that is from the 2
nd
value to
the 1
st
one. At the same time, there is a signal sent to
Start Chrono
output. The LED will go off
indicating the output is at the 1
st
value.
NOTA: You can select a 2
nd
value even when the corresponding output is on. In this
situation, though the display is not showing the actual output value, this remains
in the output.
4.3.
PHASE ANGLE SELECTION
This section describes in detail the use of the phase shifter incorporated in the PTE-50-CET, as well
as the
External Phase and Frequency Reference
.
The display in this section is indicated in degrees (0-359.9) between the output and the reference
choose (Freq. Ext., Line, Bus) in a ANTI-CLOCKWISE sense as follows
4.3.1. PHASE ANGLE SENSE
PTE-50-CET allows two phase angle senses: AMERICAN or EUROPEAN (ordered by the client).
Whatever it is selected, the initial unit status will be a balanced three phase system, turning ANTI-
CLOCKWISE.
a) EUROPEAN SENSE:
The display shows, in sexagesimal degrees (0-359.9), the phase angle between the
OUTPUT and the selected reference source (Freq., EXT, LINE and BUS), considered
positive when this is ANTI-CLOCWISE, that is:
Figure 14:
Phase Angle Selection (European)
When the unit is turned on, the phase angle selection sets the following default states and
values:
PTE-50-CET
output
Displayed angle
Source reference
(0º)
Positive degrees