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Technical sheet

Avoiding failure at sea

Recent events have shown that vessel failure at sea remains a very real risk for ship operators. One of the most effective methods of avoiding this danger is to develop and implement a proactive maintenance strategy. The question is how much to invest in maintenance?

A carefully planned and risk-based maintenance strategy is the answer. This is achieved by using a combination of preventive maintenance, proactive condition monitoring and corrective interventions whenever required. Planned preventive maintenance Investing in prevention of failure can be the difference between retaining long-term competitiveness or not. Co-ordinated and planned maintenance programmes aim to provide lifetime reliability to electrical plant and systems. Such programmes are customised with technical support, the correct spares, and maintenance kits for upgrades. Maintenance is planned around a vessels sea-going time and plant schedules, in accordance with specific time- or condition-based milestones. The benefits are many. Risks of lost operation are minimised, as are environmental and safety issues. The premature replacement of parts is avoided, thereby reducing the real cost of maintenance. Extended life cycles reduce capital

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Arc flash detection Ultra-fast clearing of arc flash faults in medium voltage switchgear panels is essential in controlling arc flash hazards. Reducing the switch off time through faster detection is the most practical way of reducing incident energy levels and dramatically improving workplace safety.

ABB’s innovative fast arc flash detection systems use fibreoptic sensors to cut the protection relay operating time to less than 2.5 ms – far faster than conventional relay technology. Challenge – Avoid costly unexpected failures of critical power train equipment

spend to enable investment to be directed to more critical areas. And finally unplanned disruption is avoided so that resources can be deployed more effectively. Condition monitoring identifies trends One of the most effective tools in a preventative maintenance programme is condition monitoring, which provides valuable maintenance information on the status of the equipment and can be carried out whilst the equipment is running. Measuring on a regular basis, trends can be observed which allows informed and intelligent maintenance decisions to be made. Among the benefits are avoiding the need for costly dry dockings, avoiding general system outages and increasing vessel availability. ABB offers a range of service technologies that analyse the condition of many electrical items. One of these is LEAP Life Expectancy Analysis Program. This provides precise information on the remaining lifetime of stator windings of a high voltage machine. It significantly reduces the risk of shut downs caused by unforeseen failures. Standard preventive maintenance can be planned around a vessel docking. MACHsense-P is a condition monitoring service for large machines, providing an early-warning to plant engineers, thereby saving considerable costly downtime. MACHsense detects potential failure well in advance including trouble with bearings, rotor winding defects, imbalances, internal misalignments and voltage abnormalities. The MACHsense-P service is available in one of two ways. A ‘standard’ service comes as part of a regular six-month maintenance plan, while ‘advanced’ service refers to a onetime intervention to troubleshoot a specific problem.

Solution – Preventative maintenance programme involving condition monitoring of critical components Benefits: – Risks of lost operation are minimised – Premature replacement of parts is avoided – Extended life cycles reduce capital spend – Unplanned disruption is avoided

For more information please contact: ABB Limited Daresbury Park Daresbury Warrington Cheshire WA4 4BT Tel: +44 (0) 1925 741 111 Fax: +44 (0) 1925 741 212 www.abb.co.uk/energy

Notes: We reserve the right to make technical changes or modify the contents of this document without prior notice. With regard to purchase orders, the agreed particulars shall prevail. ABB does not accept any responsibility whatsoever for potential errors or possible lack of information in this document. We reserve all rights in this document and in the subject matter and illustrations contained therein. Any reproduction, disclosure to third parties or utilization of its contents – in whole or in parts – is forbidden without prior written consent of ABB. Copyright© 2012 ABB All rights reserved

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ABB Service - Marine: Avoiding failure at sea factfile/April 2012

The reduction of arc flash incident energy levels is a safety priority, and one way to do this is to detect and trip for an arc flash event in the shortest time possible.


Avoiding failure at sea