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Undisturbed operation due to voltage monitoring

Power Quality as an important quality feature

Business benefits



and gapless recording



acquisition of energy and process data


Standard conformity

according to IEC61000-4-30 Class A (ed.3)

The Project

In steel works and metallurgical plants, downtime and repair costs due to the power quality disturbances become an increasing challenge Continuous monitoring of the power quality together with the process data forms the basis for undisturbed operation and the detection of possible failure causes at an early stage. Continuous monitoring of the power network parameters together with the process data forms the basis for faultless operation and the detection of possible failure.

For this reason, a leading steel producer monitors, among other things, the power quality parameters at several transformer stations (from 110KV to 30KV) in order to demonstrate compliance with contractually defined limit values according to IEC50160 standard. In addition, power flows and system perturbations are systematically recorded to optimize the workload of the transformers. In addition, process states from the automation systems were used for the evaluation.

The Technology

Due to the measurement with ibaPQU-S and further analysis of the measured values with ibaAnalyzer, excessive values of the individual harmonics were detected as well as unbalanced phase load. These parameters could be reduced by optimizing the workload of existing transformers and lines. Since then, the grid has been permanently monitored, which allows an early intervention in the network dynamics.

By combining them with data from PLCs, you are able to react quickly to changes in process chain. Thus, the required product quality is guaranteed and high downtime and repair costs as a result of poor network quality could be reduced.

A weekly report with appropriate certification information is generated for the documentation backup.

"Line synchronous, high sampling rate of up to 40kHz allows detection of all grid anomalies - no event remains undetected."

Max Borissov
PQ Expert, iba AG

iba Products


Power Quality Unit ibaPQU-S

The Power Quality Unit ibaPQU-S can be used for high-accuracy monitoring of the power quality in energy grids. For this purpose, characteristics of electric power quality are calculated according to the standard and are acquired and recorded by ibaPDA.

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As central part of the iba system, ibaPDA has been proving itself as one of the most versatile data acquisition systems for maintenance and production for years. Client-server architecture, flexible recording, simple configuration owing to auto-detect are just some of the convincing features.

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ibaAnalyzer is characterized by broad functionalities for analyzing and evaluating. The application offers an intuitive operation along with the complex scope of functions. The license for editing measurement files which have been generated with the iba system, is for free.

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Find past events rapidly, using the high resolution Historical Data (HD) server - also for continuous and long running processes. With the zoom function, browsing from annual, monthly or weekly overview down to the millisecond range is possible with just a mouseclick.

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In ibaAnalyzer the user has with the Reportgenerator a powerful tool at his disposal, that permits to generate individual reports flexibly. The Reportgenerator offers efficient options for creating templates and gives the right form to the analysis result.

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Power quality monitoring and fault analysis in a steel mill.

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