Press Stoppers Offer In-Built Protection Against Arcing Faults

Rittal 11/12/2015

171 1 minute read

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There are few things in our industry to compete with the destructive force of an arcing fault in the main or distribution busbars

Under IEC/TR 61641, all electrical assemblies must be able to withstand a short circuit current.

Press stoppers are considered essential to comply with the standard as part of the design criteria for enclosures.

Rittal’s pressure stoppers provide all the necessary safeguards for Ri4Power enclosures, protecting people and equipment from the potentially violent consequences of this event.

When an arc between phases occurs not only is a huge amount of energy released but the spark created by the ignition can reach temperatures of more than 10,000 degrees Celsius.

This heats and expands the air within an enclosure creating a rise in pressure which can exceed the enclosure’s design parameters, leading to catastrophic failure.

Not surprisingly, this destructive force, allied with the sudden, explosive release of hot gases and particles into the surrounding atmosphere can have serious consequences for the operating personnel working on or standing close to the assembly line.

Furthermore, there are likely to be substantial equipment and production losses with associated lengthy repair time and costs, adding up to considerable economic losses.

Internal short circuits which can lead to arcs are typically the result of hot spots, tracking across insulation material, animals or vermin entering into the assembly, loose parts or human errors.

All electrical assemblies under IEC / TR 61641 must be designed to take all necessary steps to withstand a specified short circuit current that is liable to result in internal arc fault conditions.

Pressure stoppers for roof plates provide pressure relief during arc fault, and a pressure relief function is essential for compliance with health and safety regulations for arcing
under IEC/TR 61641.

Rittal’s pressure stoppers convert the IP 55 roof plate for Ri4Power enclosures into a roof plate with pressure relief function. This modification only takes minutes and can be retro-fitted on site if necessary. Rittal’s pressure relief stoppers have been successfully used in low voltage applications up to 690 v 50 kA.

Further information at www.rittal.co.uk and www.friedhelm-loh-group.com, or on
twitter @rittal_ltd.

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Rittal Ltd

01709 704000
information@rittal.co.uk
http://www.rittal.co.uk
Braithwell Way, Hellaby Industrial Estate, Hellaby, Rotherham, South Yorkshire, S66 8QY GB

About us

Since its foundation in 1961, Rittal has continuously evolved into the world"s leading systems provider for enclosures, power distribution, climate control, IT infrastructure and software & services.

Today, "Rittal – The System." offers you a perfectly coordinated system platform. It unites innovative productions, pioneering engineering solutions and global service to accommodate the most diverse requirements. It caters to a whole host of industries, from machinery and plant engineering, to the automotive industry, through to information technology.All from a single source, all in top quality.

That is what "Rittal – The System. Faster – better – worldwide." is all about.

A workforce of 10,000 manufactures and develops "Rittal – The System." on your behalf. Ensuring you stay on track for success. Tap into synergy potential with our sister company Eplan, the leading manufacturer of software for cross-disciplinary engineering solutions.We never lose sight of our responsibility to the environment and society.

Where we supply to

Europe, Africa, Asia, Australia, South America, North America

Industries we supply to

Automation, Chemicals, Consultants, Components Electronics, Energy and Power, Food and Beverage, Glass Ceramics Cement, Metals and Minerals, OEM, Paper and Pulp, Pharmaceutical Cosmetics Toiletries, Plastics and Rubber, Recycling, Textiles, Tobacco, Water and Wastewater

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