UMG 510: POWER QUALITY ANALYSER


UMG 510 is a universal measuring device equipped with 4 voltage and current measurement inputs, acquires the rms values of current and voltage in powergrids from 15 to 75 Hz. By sampling and analog to digital conversion the Internal DSL (Digital Signal Processor) determines the electrical quantities. For three phase measurements, the load relevant voltage can be defined as line-to-neutral or line-to-line voltage. The load relevant voltages are further processed for harmonic analysis, flickermeter, transient and event recording.
The measured values and the recorded data are available for reading through Ethernet by the PAS510 PC-Software. The PAS510 software is included with every unit and provides configuration of the instrument and analysis of the recorded data.

SALIENT FEATURES
Power Quality Measurement according to DIN EN 50160
Continuous voltage and current measurement
Transients (up to 140us), Flicker, voltage unbalance
Harmonic Analyzer 1-50 Harmonics V and A
Symmetric components: Zero, negative, positive
16MB Flash memory, event memory, transients memory
5 digital outputs and 8 digital inputs
Embedded webserver
RS485 / Ethernet interface
Profibus DP V0, Modbus RTU, Modbus TCP, Modbus Gateway

FUNCTIONAL DESCRIPTION
Automatic adaption to power line frequencies from 15 Hz .. 75 Hz.
Measurement window 200ms,10/12 cycles at 50/60 Hz.
Continuous Sampling and calculation of :
  • RMS voltage line-neutral.
  • Star point and unbalance L1 .. L3.
  • RMS voltage line-line.
  • Frequency (same for all inputs)
  • RMS current each input, sum L1 .. L3, sum L1..L3 + N
  • Power (active, reactive, apparent, power factor, distortion power)
  • Sum power L1…L3 of the above values.
  • Active energy (consumed/delivered), main and auxiliary input.
  • Reactive energy (inductive / capacitive), main and auxiliary input.
  • Voltage and Current harmonics (up to 50th order).
  • Interharmonics, current and voltage (up to 50th order).
  • Voltage and Current THD (Total Harmonic Distortion).
  • Flickermeter (short term Pst, long term Plt)
  • Ripple control signal level.

INTERFACES:
Profibus DP V0, RS 485 (Modbus/RTU, Gateway Ethernet to Modbus), Fast Ethernet 10/100Base-Tx. Measured values and recorded data can be read through TCP/IP (Ethernet).

SOFTWARE:
The PAS510 software is provided for configuration and analysis of the recorded data. The fieldbus protocols can be used to control the digital inputs & outputs and to read out current measurement values.

DATA ACQUISITION AND RECORDING:
Acquisition and recording of minimum, maximum and mean value of any measured value, programmable time base.
Acquisition and statistical recording (histogram).
Detection of voltage sags and swells according to power quality standards.
Detection of voltage interruptions.
Detection of inrush currents of at least half cycle duration.
Detection of transient evens from 140µs.
Energy metering (active and reactive, consumed and delivered), 4 Tarrifs.
Data Storage in internal 16 MB flash memory.

DIGITAL INPUT / OUTPUT:
8 digital inputs, used for selection of tariff, external synchronization and enabling of recordings, pulse counter for external meters.
5 digital outputs, user configurable as pulse output or indicator.
8 Programmable comparators for monitoring of up to 4 values each.

MAIN INPUT:
4 inputs for voltage and current measurement. Three of them for three phase measurements.

AUXILIARY INPUT:
The fourth input (voltage/current) is for single phase or symmetric three phase systems. Alternatively the current input can be used for neutral current measurement, in addition to the main input.The auxiliary voltage input could be used for instance to monitor the voltage between the neutral and ground. This provides all measurement values of the main measurement (current, voltage, power, harmonics, transients, events and flickermeter).

Measurement uncertainties:
Value Frequency Frequency  
Voltage 15 .. 75 Hz +(0.2%rdg + 0.02%rng)  
Current 45 .. 65 Hz +(0.2%rdg + 0.05%rng)  
Power 45 .. 65 Hz +(0.75%rdg + 0.0075%rng) P.F>0.8

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