Breakers to protect Arctic expedition kit
An
E-T-A Circuit Breakers product story
Edited by the Engineeringtalk editorial team
Feb 18, 2003
E-T-A circuit breakers have been chosen by Ocean Dynamics to provide the vital electric circuit protection for the Arnold and Son Transatlantic Arctic Expedition.
E-T-A circuit breakers have been chosen by Ocean Dynamics to provide the vital electric circuit protection for the Arnold and Son Transatlantic Arctic Expedition.
Bear Grylls is leading a team of five that aims to be the first to cross the northern Atlantic via the Arctic Circle in an open rigid inflatable boat (RIB).
Travelling by way of Labrador, Greenland, Iceland and thence to Scotland, the expedition will be raising funds and awareness for the work of the Prince's Trust.
The rugged circuit breakers will be tested to the limit in the RIB.
Constructed with an aluminium hull and driven by Waterjet, it will be one of the toughest and most advanced ever built.
It is constructed to lifeboat standards, and is designed to be capable of enduring the harsh realities of floating ice.
It will be completely open to the elements and freezing spray.
Ocean Dynamics, which has designed and commissioned the Ribworker 35, has subcontracted the electrical installation work to Mustang Marine (Wales).
Based on the successful installation in other builds, Mustang Marine has chosen E-T-A 1170 thermal overcurrent circuit breakers for equipment (CBEs).
Around 50 of the E-T-A 1170s will be used to protect vital electrical circuits which include those for electronic systems, such as satellite positioning and VHF radio communication, and for navigational lights, bilge pumps and alarm systems.
In total there will be around 25 double-pole circuits, each circuit being protected independently by a CBE.
According to Mustang marine, the 1170s were chosen not only for their robustness but also for their light weight and compactness.
They can be plugged easily into a double row of bus bars which will be mounted on DIN-rail, housed in an IP67-protected casing in the console.
To provide redundancy for emergency systems such as the radio, a duplicate busbar with CBEs will be incorporated in the housing.
In the event of a trip, a circuit can be quickly repowered by a push of the button of the 1170 CBE.
An unfinished version of the boat has been displayed in the main entrance at the London Boat Show.
From February the completed RIB will be at the Royal Naval base at Portsmouth, from where it will carry out extensive sea trials.
It has been carefully configured to carry the vast amount of fuel needed to power the 450HP in-board diesel around the Nova Scotia coastline to Labrador, across the Labrador Sea and the Arctic Sea, then across the northern Atlantic to Scotland.
It is planned to ship it to Halifax, Nova Scotia in June.
The team plans to set off on the Arnold and Son Transatlantic Arctic Expedition in late July with a return to St Katherine's Dock in London in late September.
The main sponsors are British Masters SA, an English and Swiss owned watch-making firm which designs and distributes unique and exquisite mechanical wristwatches, clocks and marine chronometers under the Arnold and Son and Graham brand names.
John Arnold and George Graham were some of the greatest and most inventive watchmakers of the 18th century.
Today's timepieces are directly inspired from their remarkable achievements and inventions.
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