PM7000-FLM Fault Level Monitor

THE OUTRAM FLM PRODUCT FUNCTION

The Outram Fault Level Monitor uses natural disturbances observed on the network to derive its results.

How are the Fault Level predictions derived?

Measuring natural disturbances of as little as 0.15% the PM7000 FLM delivers three internal predictions

  • Peak Fault Level 10ms after fault – Upstream
  • RMS Fault Level 90ms after fault – Upstream (90ms time is variable)
  • Peak Fault Level 10ms after fault – Downstream

These predictions are then converted into appropriate Fault Level values.

  • Composite Fault Level results: The aggregation of multiple predictions over a given time period resulting in the most solid result of the Fault Level at that measurement point on the network.
  • Real Time Fault Level results: The most recent results generated are given in tabular format along with a confidence weighting and time stamp.
  • Fault Level Trend over time: Both peak and RMS fault level predictions are mapped over the length of the recording for a trend and comparative overview (e.g. line graph).

N.B. Performance of the FLM is based on the strength and the type of disturbances observed on the network, therefore if no or only very small, disturbances are observed then no results can be generated.

Click on the graph above to see 10 ms and 90ms Fault Level values

So how does it work?

“The Outram FLM works using a novel, patent-pending algorithm to determine worst case fault current, separating out peak ‘make’ current, RMS ‘break’ current and contributions from downstream motors.

This is achieved by extracting the tiny characteristics of interest from voltage and current signals at the arbitrary times at which natural disturbances occur, e.g. tap changes and load switching. The instrument distinguishes the various components capable of delivering the fault level results, processing these mathematically to optimise signal to noise then filtering and computing the desired Fault Level values from this data.

This innovative solution means that high quality results can be obtained from voltage disturbances of as little as 0.15%. No previous knowledge of the network is required and the FLM can be deployed at any voltage level assuming the necessary CTs and VTs are in place.”

John Outram, Managing Director, 2012

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Your kit knocks spots of the bigger manufacturers

Your kit knocks spots of the bigger manufacturers.

Andrew Williams, MD, Smart Electrical Systems, Sept 2018
…PM3000 is the best product in my shop

The reason I think your PM3000 is the best product in my shop is the reliability and the software. I use 5 different brands of recorders and this one by far has been the most reliable. The software updates are great, with the 60 day reminders. The layout of the software and every single function make it simple and user friendly unlike most products.

Greg Ellis, Electrical District #3, Arizona USA, 2014
Fault Level Monitors to Validate ENWL RESPOND Project Network models

Fault level monitors – Outram fault level monitors have been installed at seven [Electricity North West] Respond [Project] sites. These monitors will validate our network model and the Fault Level Assessment Tool. Electricity North West Ltd RESPOND Project Newsletter, May 2016.

Electricity North West Ltd RESPOND Project Newsletter, May 2016.
Outram PM7000FLM proved capable of reliably assessing Fault Level

The Outram PM7000FLM and associated software proved to be capable of reliably assessing / calculating fault level from both repeated low-level steps, as well as one-off larger pulses.

Rob Weller, Rina Consulting, UK Power Networks Earth Fault Level Project, March 2018
…calculation of fault level trivial in comparison to the ‘manual’ methods

The Outram equipment (and associated software) makes calculation of fault level trivial in comparison to the ‘manual’ methods.

Rob Weller, Rina Consulting, UK Power Networks Earth Fault Level Project
Bluetooth functionality with PMScreen and real time monitoring is sensational.

Thank you so much for attending to [my support query], and so quickly! Very impressed with these [PM3000] power analysers and the Bluetooth functionality with PMScreen and real time monitoring is sensational.

Euan Galbally, Operations Project Engineer - Supply Restoration, SSE.
….Commendable for its ease of use and portability

The Outram equipment is commendable for its ease of use and portability.

Rob Weller, Rina Consulting, UK Power Networks Earth Fault Level Project
The Outram PM7000FLM … software made analysis of fault-current straightforward

We found the Outram PM7000FLM useful for capturing data, and its software made analysis of fault-current straightforward. Other methods of data capture can be used, but would require further development to accurately give fault level information; the area where the FLM scores is its ease of use, and also that statistical analysis is applied over the whole test period, rather than at a ‘snapshot’ of one event as our analysis. This makes it less prone to noise and other disturbances on the system.

Rob Weller, Rina Consulting, UK Power Networks Earth Fault Level Project, March 2018