Sira is a world leader in the conformity assessment solutions field, specialising in explosion protection of equipment used in potentially explosive atmospheres (Hazardous Areas).
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With advancements in digital electronics and reduced component costs in recent years, monitoring instruments for use in condition-based maintenance programs have become more cost-effective and dependable. Machinery does not need to be taken out of service as many tests are done online, and in many cases very little expertise is required for testing and data interpretation. This enables the user to make well-informed decisions for planning maintenance and repairs, which ultimately leads to increased productivity.
This article concentrates on one technology that has been developed to reliably detect broken rotor bars, abnormal levels of air gap eccentricity, and other problems in squirrel cage induction motors and driven components using motor current signature analysis (MCSA).
Consequences of broken rotor bars
Rotor windings in squirrel cage induction motors are manufactured from aluminum alloy, copper, or copper alloy. Larger motors generally have rotors and end-rings fabricated out of these whereas motors with ratings less than a few hundred horsepower generally have die-cast aluminum alloy rotor cages.
Leading maintenance repair and operation (M.R.O.) organizations are leveraging a range of best practices for optimal asset performance. Such methods encompass maintenance best practices that drive efficiencies and equipment life cycles, as well as cost-cutting ideas from allied industries like field services.
Efficiently run field service teams have, for years, used and benefited from automated scheduling applications that deliver the right service tech to the right location at the lowest cost. They have cut wasteful travel and duplicate visit expenses to complete more service calls that better serve their customers and extend asset life.
Conversely, asset managers are well aware that more work order information and background, with more details, in the hands of technicians at the point-of-performance is a key productivity driver that means improved equipment performance. Data captures reported electronically also are driving better decision-making by management, in addition to fueling accurate and timely compliance reporting.
Make more of your assets
All companies depend on critical assets, whether they are a fleet of trucks or a plant full of production equipment and caring for those assets is crucial. Traditionally, organisations had to rely on multiple software solutions to meet the specific needs of different asset types. These solutions, however, provide only a partial view of an organisation
The Reinhardt-Technik range of
Probably the smartest infrared camera on earth!
The new ThermaCAM
The new Bekomat 31/32 condensate drains made by Beko Technologies now consist of only two element groups. Thanks to their novel construction principle, complete maintenance can be carried out with one single movement.
Considerable advantages as far as maintenance and cost-effectiveness are concerned: these are the characteristic features of the new Bekomat 31/32 devices. The new generation condensate drains are subdivided into two modules only: the service unit which, in its non-corroding aluminium housing, combines all maintenance components and the electronic control and sensor unit, which only needs to be installed once. Both units are coupled via a practical quick connector.
This concept allows the completely simple replacement of any maintenance and wear-relevant parts by only the fast replacement of the service unit which was checked by the manufacturer.
Self-monitoring is one of those things the Environment Agency has picked at for a long time but it's still a surprise to see a full-blown scheme to expand it in the air.
The Agency has chosen to roll out its new Operator Monitoring Assessment (DMA) system on monitoring air emissions from industrial processes regulated under Integrated Pollution Control (IPC) - one of its toughest regulatory tasks.
"We chose it first as the most difficult to do,"says the Agency's OMA manager, Paul Wiggins. "It has the greatest variety and complexity and itmakes sense to start with it."
Under OMA, the Agency will assess the self monitoring of air emissions that operators and their contractors carry out and, on the basis of this audit,decide what priority to give check monitoring of the site. Plainly this provides operators with an incentive to do the job properly; do it well and the lightest of regulatory touches will be placed upon them, do badly and the onerous hand of the regulator will lie heavy.
The scheme was finalised last November and trials and audits are now well underway. A review
of progress so far is in progress and the Agency hopes to have all 1800 IPC processes in England and Wales audited by the Spring of 2003.