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TEGG energised maintenance survey

The Metropolitan TEGG department performs bespoke and comprehensive trending analysis surveys for a number of our clients’ electrical infrastructures. This is done by taking snapshots of a piece of equipment over a period of time, with the purpose of monitoring the condition of the equipment and its life expectancy accordingly.

The Metropolitan TEGG department was employed to carry out two of these surveys for elite clients across London. The following is a breakdown of what the two surveys entailed, and how they helped the clients manage their electrical infrastructures more effectively as a result.

The Metropolitan solution

Survey 1: Trending analysis on mission-critical equipment

The first survey was undertaken within a large data centre in west London. Over a period of 12 months, the TEGG technicians took quarterly snapshots of specified electrical equipment. These shots were comprised of:

  • A temperature recording (Celsius) using an infrared camera
  • A sound recording (dB) using an ultrasonic probe

Below are the survey graphs used to portray both recordings (the Y-axis) against the equipment (the X-axis), with each coloured line representing the quarter in which the snapshots were taken. The purpose of these graphs was to allow the client to notice any operational changes to the equipment – such as an increase in temperature or noise levels – over a period of time. Outliers could also be identified, and the history of the equipment monitored, too.

Equipment temperature graph

Equipment temperature graph

Equipment decibel trending graph

Equipment decibel trending graph

As you can see, the graphs clearly highlighted areas that needed addressing within the client’s electrical infrastructure. The average temperatures for the equipment tested were increasing throughout the year, and a few of the electrical assets were displaying spikes in volume throughout Q1. This gave the client the information they needed in order to fix the temperature increases – which we can see decreasing in Q3 – and to repair the noise levels of one ACB unit and three IR windows.

Survey 2: Trending analysis for equipment affected by excessive vibration

A client in central London required a trending analysis on a busbar located near civil works. The client expressed concern that the excessive vibration from the civil works might have caused damage to the internal systems of the two busbars.

TEGG technicians performed two trending analysis surveys, six months apart, in order to spot any potential damage. Each survey consisted of a thermal snap-shot for each of the joints on both busbar systems. Following the completion of the second survey, the temperatures were compared to see if there was any rise in temperature on any of the busbar joints.

The condition assessment, however, showed all the busbar joints were in good working order after the civil works had been completed, with temperatures remaining stable over the six-month period.

Bus system 1 temperature trending graph

Bus system 1 temperature trending graph

Bus system 2 temperature trending graph

Bus system 2 temperature trending graph

Both trending analyses expressed to each client the necessary information they needed in regard to the health of their surveyed electrical equipment, showcasing just how effective Metropolitan’s TEGG bespoke trending analysis surveys are.