DPMS XPQ, User Manual

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7
POWER INSTRUMENTS
Remote Power Control
The main function of the DPMS XPQ is measurement, but it also has some
flexible I/O functions. This makes the meter very useful as a distributed RTU
(metering, monitoring, remote controlling in one unit).
Power Quality Analysis
With the powerful digital signal processing ability, the DPMS XPQ intelligent
power meter can be used as an online power quality analysis instrument. It can
simultaneously and continuously give out the analysis results such as THD of
voltage and current, harmonics up to the 31st order and an unbalance factor of
voltage and current, etc. Main functions of the DPMS XPQ are listed in table 1.1.
Metering Energy
VLN, VLN average, VLL, VLL average.
I, I average, IN.
Power, Reactive Power, Apparent Power and Power
factor of each phase and total.
Frequency. Bidirectional, four quadrants and system Energy,
Reactive Energy, Apparent Energy
Programmable energy freezing.
Period Energy, Reactive Energy, Apparent Energy
Four time zone schedules.
Statistics and Records Energy and Demand
Max/Min value of statistics with time stamp
Maximum of Demand
SOE, Waveform capture and records kWh, kVARh of 4 quadrants:
Import, Export, Total, Net
Demand of Power and Reactive Power
Power Quality Analysis Over range Alarming
THD, Even THD and Odd THD of Voltage, Current
Harmonics and Crest factor of Voltage
Telephone Harmonic waveform Factor (THFF).
Harmonics and K Factor.
Unbalance Factor of Voltage and Current.
Statistics of Voltage Eligibility. Monitor up to 240 parameters.
Programmable parameter limitations.
Programmable alarming logic.
Alarming outputs combined with DO or Relays.
Auto-recording of alarming events.
Alarming-trigger waveform recording.
Communication I/O port and Control
RS485 Communication port.
Modbus RTU Protocol 4 Digital Input (DI) (Wet or Dry)
2 Relay Output and 2 Digital Output (DO)
Table 1.1 Main functions of the DPMS XPQ series