the fundamental for frequencies between 5-10Hz can
result in perceptible light flicker.
Voltage Flicker parameters include: PST, PLT, PLT
(slide), and Pinst.
Please see the parameter list below for a complete list
of parameters.
Unbalance/Imbalance
Unbalance is the relationship between the magnitude
and phase angle of power system phases. A three
phase power system is considered balanced when the
magnitude of the voltage and current in each phase is
equal, and each phase is separated equally by 120
degrees. Any change from this ideal indicates an
Unbalance (Imbalance). Depending on your geographic
region, different references may be used, so the
Dranetz HDPQ supports several methods of computing
Unbalance:
V/I Sequence:
Positive, Negative, and Zero sequence components for
both Voltage and Current.
V/I Unbalance:
Voltage Unbalance (RMS/RMSAverage), Voltage
Unbalance (S2/S1), Voltage Unbalance (S0/S1), Current
Unbalance (RMS/RMS Average), Current Unbalance
(S2/S1), Current Unbalance (S0/S1), Voltage
Imbalance, and Current Imbalance.
Please see the parameter list below for a complete list
of parameters.
R
EPORTING AND
C
OMPLIANCE
-
A
LL
HDPQ
INSTRUMENTS
The Dranetz HDPQ has many reporting functions
available, and the user can choose the reporting
method that best suits the needs of the application.
Basic reporting (such as real-time meters), historical
trends and event lists show data in its basic form. More
advanced reporting, such as EN 50160 compliance,
Dashboard alarm panels, and a Mini-Report are also
available. Like all Dranetz portable products, the
Dranetz HDPQ is fully compatible with Dran-View 7
Power Quality, Demand and Energy analysis, and
reporting software.
Real-time Meters, Trends and Event Lists
All parameters available in the Dranetz HDPQ can be
metered in real-time, trended over time, and can have
trigger conditions enabled to record details of changes
in each parameter. The resolution of each trigger is
parameter dependent.
Real-time meters display the instantaneous value of
each parameter, which is updated about every second.
For monitoring, users can set Journal intervals that
record data at pre-determined timed intervals,
regardless of whether or not trigger conditions have
been met. Four independent Journal time categories
are available: Power (V, I, W, etc.), Demand/Energy,
Harmonics, and Flicker. Depending on the parameter,
the Journal interval timer can range from seconds to
minutes to hours. Once Journal intervals are recorded,
the user can trend the minimum, maximum, and
average of most enabled parameters. Trend graphs can
be configured in a stacked or overlayed display mode
and are ‘zoomable’ to magnify any data of interest.
Event lists are available to indicate any triggered
events recorded to the instrument’s database. The
event list appears in chronological order, and the user
can scroll the list and select any event for further
analysis. Both time and type filters are available for
the user to select a specific time period to display, as
well as the type of event, such as RMS or Transient.
Shop for Power Metering products online at:
1.800.561.8187
www.
PowerMeterStore
.ca
