60
Communication & Verification
DENT Instruments
PowerScout HD
Verification of Installation
Once the PSHD meter is configured and communicating with the RTU, it is a good idea to perform some
simple checks to ensure that all the CTs are on the correct voltage phases and that the CTs are facing the
correct direction. The following are recommendations that work for typical installations. Special circuit
conditions, like unloaded motors, may indicate an installation error when none exists. A Digital
Multimeter (DMM) can be used to confirm these cases.
I
NSTALLATION
P
HASE
V
ERIFICATION
The PSHD meter includes a PhaseChek™ algorithm that identifies any element that the meter suspects
may be incorrectly phased (i.e., the CT is associated with the wrong voltage source or is physically on the
wrong wire) based on power factors below 0.55. This feature is accessed using the LCD user interface by
navigating to “VERIFY INSTALLATION” and pressing the ENTER button or locating within the scrolling
window contents for a PS3HD meter. The LCD user interface will list the elements having at least one
channel with a low power factor.
CHECK ELEMENTS
A EF
Use the navigation buttons to highlight a specific element and hit enter or just hit enter and move from
element to element using the
/
keys. Within each element (identified on the top line of the
display) the status of each channel is identified as OK (PF > 0.55) or bad (PF < 0.55).
ELEMENT F
CH1 OK
CH2 Bad
CH3 Bad
Two “Bad” channels are often an indication that two CTs are inadvertently swapped. When the power
factor for all enabled channels is greater than 0.55, the meter reports:
CHECK ELEMENTS
ALL CHANNELS OK
PhaseChek™ is only applied for elements that are enabled. VIEW METER SETUP on the LCD user
interface can be used to ensure that all intended elements are active. PhaseChek™ is advisory
only. It is possible that the power factor for a particular load is truly less than 0.55, as may be
observed in a free running motor.
The ViewPoint HD and the PSHD Web App run
PhaseChek™
continuously on all enabled elements and
report low power factor in the real time values table by turning the text
RED
or by a using a red
indicator.
www.
.com
1.800.561.8187
