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Continuous power disturbance analysers

06 October 2010

If you are looking for accurate detection and isolation of mains power disturbances, then the latest range of high definition power quality analysers from Elspec (now available in the UK from Aspen Electronics) will be of interest.

Suitable for monitoring mains power supplies into critical facilities such as factories, hospitals, universities and medical installations, the Elspec Blackbox range of G4400 (fixed) and G4500 (portable, wirelessly connected) power quality analysers provide continuous monitoring as opposed to triggering at the onset of a fault condition. for effective preventive maintenance.

The Elspec G4400 and G4500 analysers require no triggers or thresholds to be set as all mains parameters are measured. With no missed events, and every disturbance accurately analysed, the root cause of any problem can be traced precisely to its source. Additionally, Elspec Blackbox units combine disturbance analysis with measurement of real time power consumption, which Aspen believes is unique to the market.

The real-time monitoring capability uses Elspec’s patented data compression algorithm, PQZIP, which typically achieves a 1000:1 compression ratio to maximise storage capacity and avoid data gaps. Moreover, the analysers are able to store all waveforms of every cycle for up to a year, at up to 1,024 samples per cycle resolution. They can calculate cycle by cycle rms, frequency and harmonics (to the 511th), as well as a variety of other waveform parameters for post-processing and in-depth analysis.

Other features include compact flash extension ports, a built in web server for remote monitoring using standard web browsers, integral OPC servers (DA and AE) for seamless integration with SCADA systems, two Ethernet ports (100Mb) with PoE device and source, USB and RS485 ports. An optional multi-I/O expansion module extends the monitoring capabilities with additional digital and analogue I/O ports.

For large installations, up to nine modules can be supported, and a novel time synchronisation algorithm assures that logged data from multiple units is synchronised and displayed on the same time scale, typically with 0.1ms resolution.

Aspen can also supply Elspec’s G4100 remote display unit - a stand alone controller that allows the user to configure any number of G4400 series power meters via a local network, or anywhere in the world via TCP/IP communications.


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