W
IRING
C
ONFIGURATIONS
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A
LL
HDPQ
INSTRUMENTS
All Dranetz HDPQ instruments can be connected to the
following circuit types:
Single phase
Split Phase
3 Phase, Four Wire Wye
3 Phase Delta
3 Phase (Floating or Grounded) Delta
3 Phase 2-Watt Delta
2 1/2 Element without Voltage Channel B
2 1/2 Element without Voltage Channel C
Generic Circuit – 4 single phase measurements
Variations of the above
I
NSTRUMENT
S
ETUP
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A
LL
HDPQ
INSTRUMENTS
The Dranetz HDPQ offers both automatic and manual
setup methods allowing users to be immediately
productive, and to begin monitoring within minutes.
Automatic setups are the quickest and easiest way to
start monitoring in just a few steps. When connected
to an energized circuit, the instrument automatically
detects the circuit type, nominal voltage/current and
displays them for review. The user can then set the
current probe type and start monitoring immediately.
The instrument will configure itself using triggers
based upon the IEEE 1159 +/- 10% of nominal
recommendations. Automatic setups are available for
both Power Quality and Demand/Energy.
Wizard setups are also available for the user to have
complete control over the instrument’s setup and
triggering. The Wizard setup guides you step-by-step
through each setup category. Wizard setup categories
are: Probes/Scaling, Wiring Configuration,
Nominal/Frequency, Monitoring Mode, Trigger Limits,
and Finalize. Each category is randomly accessible and
guides the user through the settings available in each
setup screen. The instrument will also inform the user
of potential setup errors, such as mismatches between
the circuit type setting and the circuit type
automatically detected.
P
OWER
Q
UALITY
M
EASUREMENT
F
UNCTIONS
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A
LL
HDPQ
INSTRUMENTS
The Dranetz HDPQ family of instruments offers the
latest in Power Quality, Demand and Energy
measurement, and monitoring capabilities. Each
Dranetz HDPQ product is Class A compliant with IEC
61000-4-30:2008 and also supports EN 50160:2010, IEEE
1159, IEEE 519:2014 and IEEE 1453.
Data Acquisition
Each Dranetz HDPQ instrument samples every cycle of
each voltage and current channel 512 times. Sampling
is gapless, which means each voltage and current cycle
is continuously sampled without gaps between cycles.
Sampling is controlled by a Phase Locked Loop (PLL)
circuit that is referenced to channel A voltage by
default, with other references available, including
current. The PLL automatically adjusts the sampling
rate to the power line frequency to ensure that the
instrument always acquires 512 evenly spaced samples
per cycle for every channel. Therefore, any variation
in the power line frequency adjusts the sampling rate
accordingly. This translates to a sampling rate of
30.72KHz at 60Hz and 25.6KHz at 50Hz. Switchable
Anti-Aliasing filters are available for strict compliance
with IEC 61000-4-30 Class A. Note that switching in
such filters may limit the transient response of the
instrument. The instrument is Class A compliant with
Anti-Aliasing filters switched either on or off.
The data acquired by the above process is digitized by
a 16-bit Analog to Digital (A/D) converter and is used
as the foundation for all voltage, current and power
measurements, and computations that are available in
the instrument.
This technique of data acquisition is appropriate for
low and medium frequency transients as defined by
IEEE 1159. At 512 samples per cycle, the time between
samples is about 32us at 60Hz and 39us at 50Hz, which
is adequate to record transient activity on most power
systems. The Dranetz HDPQ Xplorer and Xplorer-400
have additional high speed transient circuitry for 1
microsecond transient detection.
Shop for Power Metering products online at:
1.800.561.8187
www.
PowerMeterStore
.ca
