65 Years Of Expertise In Industrial Equipment
Thanks to Carin Hannay at Sparks Electrical News & Lighting Design Magazine
Founded in 1952, the Marechal Electric counts among the major players in Low Voltage LT electrical connection systems in industrial environments with or without the presence of an ATEX explosive atmosphere. With a consolidated turnover of nearly €100 million, its operational and/or sales subsidiaries in Europe, America, Asia, the Middle East, Africa and Australia, offer the best products and local services to the most demanding customers.
A workforce of nearly 500 worldwide includes R&D, manufacturing and commercial development skills. The product range is intended for all sectors of industrial activity where safety and endurance are required.
Marechal plugs and sockets (decontactors) provide low voltage power supply for high current, high temperature and hazardous area (Zone 1 & Zone 2) ATEX power distribution applications – this includes power plugs for electric generator sets, motors, machines, distribution boxes, pumps and electric cabinets.
Thorne & Derrick, Experts in Equipment for Explosive Atmospheres, are Specialist Distributors of Marechal plugs and sockets in the UK including ATEX and IECEx certified decontactors for LV electrical power distribution.
History
Since its creation in 1952, Marechal Electric is a French family business, independent, committed to its customers, its employees and its suppliers.
The company specialises in the manufacture of low voltage electrical connectors from 5 A to 700 A, as well as electrical solutions for potentially explosive atmospheres through the Technor® brand.
Its customers benefit from Marechal® products designed to ensure safety, durability, performance, ease of use and energy efficiency.
The company offers products under two complementary brands MarechaL® and Technor® with the same level of quality requirement worldwide. Committed to this approach, Marechal Electric has remained since 1952 an example of success, offering products of unrivalled quality, resulting from the research and development that make the reputation of the French electrical industry. The principles of Marechal Electric The principles of Marechal Electric stands also for collaboration based on trust, proximity with partners, suppliers, customers and employees.
A technology without equivalent …
Marechal® Decontactor™
The only electrical connector that combines a connector and a switch. Its unique technology allows you to connect and disconnect electrical connectors from 5 A to 250 A on load.
Butt contact on a silver-nickel tip
The Marechal® Decontactor™ and connectors are all fitted with butt contacts with silver-nickel tips. They provide exceptional connection quality by eliminating the damage due to electric arcs and to wear seen with pin and sleeve sockets. The silver is an excellent conductor of current even when oxidized. Conductivity is optimal even in the presence of vibration and temperature variation thanks to the pressure of the springs.
Crimped braids
The Marechal® contact uses a crimped braid with a spring which provides contact performance and tolerances superior to pin and sleeve contacts. The flexibility of the braid and the spring allows the base contact tip to always be perfectly aligned with the plug contact tip. These contacts, which are silver and anti-corrosion treated, offer very good corrosion resistance.
Elastic lock terminals
Marechal® contacts are fitted with ‘elastic lock’ connection terminals. The wire clamp is split and surrounded by a rubber ring. This method allows the tightening force on the wire to be constant. Hence despite the creep of the copper or aluminium, the variations of temperature and vibration, the conductor wire is perfectly connected to the contact terminal.
Safety shutter
Decontactor™ bases are fitted with an interlocked safety shutter which prevents access to live contacts. This shutter only unlocks at the time of connection of the plug into its base.
Marechal® range connectors and Decontactors™ have casings made from fibre glass- or metal-reinforced GRP, depending on the models. This choice of material contributes to the excellent mechanical performance and longevity of the socket.
Out With The Old, In With The New. Contact T&D to arrange a UK site demonstration or survey of your power distribution requirement. No obligation. No cost.
Economy of installation: dual-voltage
With a single base (e.g.: 3Â Pnt – 230/400 V) it is possible to feed three plugs indifferently:
This compatibility provides real savings on the installation of these sockets for the user.
Benefits:
These technical choices provide Marechal® connectors and Decontactors™ with unparalleled performance:
Thorne & Derrick are leaders in the development and distribution of Product Innovations that deliver significant improvements to clients plant, people and operational safety in the explosive atmosphere industries.
Your proactive problem solvers experienced in succession planning for the replacement of obsolete, non-conformant and legacy equipment in hazardous areas.
Your first-choice provider of innovative and competitive solutions to ensure ATEX & IECEx Compliance for Hazardous Area Electrical, HVAC & Process Instrumentation Equipment to UK and international projects.
Control Panels | Plugs | Isolators | Enclosures & Junction Boxes | Lighting | Control Stations | Motor Starters | Heat Trace | Gas Detection | Flame Detection | Process Instrumentation | Process Heating | Ventilation Fans | Security Access ControlÂ
You can Follow our Showcase Page on LinkedIn to receive updates about more hazardous area product innovations, industry news, whitepapers, videos, technical tips and training webinars for professionals involved in the explosive atmosphere industries.
Experts In Equipment for Explosive Atmospheres | Leaders in ATEX Innovation
Fire Rated Switchgear | F400
Switch Disconnectors for Essential Power Supply
The critical role of fire rated switchgear is to maintain the power to the vital equipment such as smoke extraction or ventilation fans to facilitate safe evacuation of buildings, car parks, or other public areas in the event of a fire.
These switch disconnectors form part of the isolators range are generally installed near the extraction fan for isolation of power supply and have been tested in conjunction with fan equipment to meet the stringent thermal requirements of fire safety and BS EN 12101-3.
Craig & Derricott are delighted to launch the new design F400 Fire Rated Switchgear range which are available from 20A to 1250A and all fully tested and certified.
They have been designing electrical switchgear for 80 years and this expertise and an increasing demand from the ventilation industry has led to us to offer the most extensive range of F400 certified fire rated switchgear in the market.
The critical role of fire rated switchgear is to maintain the power to the vital equipment such as smoke extraction or ventilation fans to facilitate safe evacuation of buildings, car parks, or other public areas in the event of a fire. These switch-disconnectors are generally installed near the extraction fan for isolation of power supply.
The new F400 range is now available in ratings 20A to 1250A, in a variety of formats ranging from 2P to 8P. The units are supplied in two new enclosure designs:
IP65 Red Die-Cast Aluminium
IP65 Red Sheet Steel
Fire Rated Isolators | F400 Fire Resistant Switch Disconnectors
Craig & Derricott new die-cast aluminium enclosures ranging 20A to 63A are fitted with a black powder coated die-cast aluminium operating handle while the new sheet steel enclosures, 63A and above, are fitted with a highly durable anodised aluminium operating handle. Both handles have been designed to retain the enclosure IP65 rating while withstanding 400°C.
Each unit is supplied with one of our base mounted interior switches, which are constructed from a high temperature grade thermoset material, designed specifically for ease of cabling and for installations where the supply must be maintained for 2 hours at 400°C.
Safety & Protection
The switchgear maintains the power and provides isolation to essential smoke extraction and ventilation equipment. All units are featured with our safety handles, that are lockable in both ON and OFF positions and be padlocked with up to three padlocks.
The full range of fire rated switchgear has been specially designed for installations where the power supply must be maintained even at high temperatures for the periods of time below:
To ensure a safe and reliable operation in abnormally hot environments, our products have been tested by a third party laboratory according to the standard EN 12101-3.
 Related Products | Fire Rated Resistant Junction Boxes Enclosures | Fire Rated Resistant Plugs
Fire Rated Switchgear | F200 | F300 | F400 for Fire Resistant Building Services Applications
Fire Resistant Isolators | ATEX Explosion Proof Hazardous Area Zone 1 & Zone 2
Control Panels | Plugs | Isolators | Enclosures & Junction Boxes | Lighting | Control Stations | Motor Starters | Heat Trace | Gas Detection | Flame Detection | Process Instrumentation | Process Heating | Ventilation Fans | Security Access ControlÂ
Competitive Prices | Extensive Stocks | Technical Support | Express Delivery
CEAG ExLin
CEAG ExLin Zone 1 Lighting Fixtures
for Explosive Atmospheres & Hazardous Area Locations
The CEAG ExLin zone 1 LED hazardous area lighting fixture has been on the market since last year. The ExLin is the successor to the eLLK 92 by CEAG, an unsurpassed luminaire series (for fluorescence and/or LED) that is still available.
The ‘sealed for life’ LED modules of the ExLin are characterized by;
 💡 Did you Know? Thorne & Derrick using latest software provide a FREE LIGHTING DESIGN SERVICE for the specification and supply of ATEX & IECEx Certified light fittings to provide safe and reliable lighting in explosive atmospheres and hazardous area locations.
Eaton CEAG | ExLin LED Linear Light Fitting for Zone 1 & Zone 2 Hazardous Areas
The light image can be adjusted entirely to customer wishes and to the lighting installation (also afterwards) by choosing from different versions;
Hazardous Area & Explosion Proof Lighting Fittings Manufactured by CEAG – including LED and fluorescent linear light fixtures and fittings for hazardous area lighting where potentially explosive atmospheres including Zone 1 & Zone 2 (Flammable Gas) and Zone 21 & 22 (Flammable Dust) require certified ATEX or IECEx certified lighting.
CEAG Explosion Proof Electrical Equipment
CEAG is now EATON | Electrical Equipment for Explosive Atmospheres
Thorne & Derrick are leaders in the development and distribution of Product Innovations that deliver significant improvements to clients plant, people and operational safety in the explosive atmosphere industries.
Your proactive problem solvers experienced in succession planning for the replacement of obsolete, non-conformant and legacy equipment in hazardous areas.
Your first-choice provider of innovative and competitive solutions to ensure ATEX & IECEx Compliance for Hazardous Area Electrical, HVAC & Process Instrumentation Equipment to UK and international projects.
Control Panels | Plugs | Isolators | Enclosures & Junction Boxes | Lighting | Control Stations | Motor Starters | Heat Trace | Gas Detection | Flame Detection | Process Instrumentation | Process Heating | Ventilation Fans | Security Access ControlÂ
Gas Detection
Gas Detecting With Pumped Instruments
In many situations, workers must perform pre-entry gas detection checks, to make sure that a confined space is safe before entering. This is often a requirement arising from risk assessment or to allow the issuing of permits to work, or is simply needed because the area is inherently risky.
Whatever the reason, using a pumped device in conjunction with a sampling tube is a great way to perform pre-entry checks to check that a confined space is safe before entry.
An alternative way to detect gases in confined spaces is to lower a portable gas detector into the work area.
Before You Begin
However, taking measurements in this way brings its own set of challenges and dangers, and when using Crowcon products in pumped or manual sampling modes, all operators should take care to follow these instructions:
In addition, please note that some of the gases that can be measured by Crowcon gas detection products are classified as ‘reactive’ gases.
A reactive gas will react with, or be absorbed by, the material(s) with which it comes into contact. As a result, the gas concentration reaching the sensor can be reduced, leading to an incorrect reading.
The following list includes some (but not all) reactive gases, which are listed with the appropriate calibration gas. Please contact Crowcon for specific gas concentration information and cross-calibration values).
Target Gas Calibration Gas
Ozone (O3) Ozone (via O3 generator)
Hydrogen Chloride (HCL) Hydrogen Chloride
Hydrogen Fluoride (HF) Hydrogen Chloride or Sulphur Dioxide
Chlorine (Cl2) Chlorine (via Cl2 generator)
Fluorine (F2) Chlorine (via Cl2 generator)
Chlorine Dioxide (ClO2) Chlorine (via Cl2 generator
Phosgene (COCl2) Chlorine (via Cl2 generator)
Sulphur Dioxide (SO2) Sulphur Dioxide
Nitrogen Dioxide (NO2) Nitrogen Dioxide
Nitrogen Monoxide (NO) Nitrogen Monoxide
Ammonia (NH3) Ammonia
Crowcon Gasman Portable Detector
âž¡ T&D also stock and distribute a broad range of hazardous area equipment for use in confined spaces.
It is very important that the appropriate accessories and precautions are applied when measuring, calibrating or bump testing sensors that are targeting reactive gasses.
When taking sample measurements: Use Teflon, FEP or PTFE tubing; the tube length must be kept as short as possible (<50 cm), avoid connectors and unions and allow the sample to flow through the regulator/pipe for at least 3 minutes, for initial absorption to occur, before attempting to get a reading.
When calibrating the above points apply in addition to the following:
• The recommended gas flow-rate is 0.5 litres per minute.
• Gas generators are recommended, instead of gas cylinders, for some very unstable gases, especially where very low ppm concentrations are required.
• Use only stainless steel regulators for cylinder gas.
• Ensure the correct calibration adaptor is used, appropriate to the specific product.
Following the above guidance will allow your pumped devices pre-entry checks to deliver accurate measurements – even with reactive gasses – and will keep staff safe and well.
ATEX Certified | Transformers | Cables | Cable Reels | Splitter Boxes
Heating & Ventilation for Confined Spaces
Wolf LinkEx Confined Spaces Lighting Kit ATEX – Hazardous Area Zone 1 & Zone 2
Hazardous area industries including offshore oil/gas platforms and FPSOs, onshore oil refineries, processing plants, pipelines, storage farms and LPG/LNG plants all utilise or produce a wide range of hazardous flammable liquids and gases that can be detected using correctly specified flame and gas detectors.
Detecting toxic and flammable gases requires the detectors to be classified and certified according to the specific IECEx or ATEX standard – we distribute flame and fire detectors manufactured by Spectrex to operate in the harshest environmental conditions including self-contained stand-alone devices designed for direct connection to control and alarm systems or automatic fire extinguishing systems.
Our range of Hazardous Area Fire & Gas Detection System products also includes Explosion Proof Warning Systems & Hazardous Area Lighting – comprehensive range of intrinsically safe, flameproof and explosion proof alarm sounders, sirens, bells and horns, loudspeakers and beacons.
♦ LV Power Products | Junction Boxes & Enclosures ATEX | Plugs ATEX | Control Stations ATEX | Isolators ATEX
Thorne & Derrick | Detecting Flame | Heat | Gas
Process Heating & Maintaining Temperature of Chocolate
Thorne & Derrick International, based in the UK, have recently assisted a leading global confectionary manufacturer with major production issue.
Chocoloate production was at a risk of standstill if a temporary electrical heating solution could not be found and delivered within strict time restraints. T&D assisted and helped to ensure the chocolate continued to flow without revenue losses in the production processes.
Chocolate is a sensitive product to work with as fluctuations in temperature can severely effect the quality of the chocolate produced. Maintaining quality and taste occurs by keeping the temperature range between 40 and 45ºC. Chocolate solidifying is a major problem for manufacturers and blockages can result in down time and significant financial loss.
T&D received a call with an initial requirement for a quantity off 40 IBC heating jackets that were time-critical needing to be on site within a month. The client needed a temporary storage solution during a production transit period. Initially they had requested 40 1KW IBC heating jackets which would be very expensive for a temporary solution. The IBC’s were identified as a stop gap and would be required for 8-10 weeks. Temporary storage containers were a possibility but ruled out as they were also too expensive.
HF6IBC-3 IBC Heating Jacket – 3000W
Getting a better understanding of the manufacturing process allowed T&D to reduce capital spend and recommend 20 units of the 3KW IBC heating jackets. This was possible as it was identified that all IBC’s didn’t need to be kept warm at any one time. Using 3KW heaters meant heat up times could be significantly reduced which in turn meant the client could reduce the batch control to 20 IBCs and thus 20 heating jackets.
This was a value engineered cost effective solution to a temporary problem. The technical expertise of the T&D design team was required to get a better understanding of what type of heating was required, how the heat up time could be reduced and ultimately what jacket would be most suitable.
Customer Contact
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Understanding of Application of Production Process
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Design Proposal
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Technical Qualification & Evaluation
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Order Placed
âž¡ T&D are also able to provide bespoke heating jackets designed to meet your specifications in 2 to 3 week lead time.
T&D are the UK’s largest stockist of Drum, IBC & Tank Heaters & Jackets. Delivering UK & Worldwide
âž¡ New ATEX Innovation from T&D for the moving/handling of bulk storage equipment including IBC’s. Contact T&D to discuss your requirements for the world’s first truly ATEX certified door. T&D are working with clients across the global bringing ATEX innovations to ensure safety when working in potentially explosive atmospheres.
ATEX Doors – High Speed Roll-up Doors for Explosive Atmospheres For The Bulk Storage & Handling Of IBC’s
Follow our Showcase Page on LinkedIn to receive hazardous area product innovations, industry news, whitepapers, videos, technical tips and training webinars for professionals involved in the explosive atmosphere industries.
Control Panels | Plugs | Isolators | Enclosures & Junction Boxes | Lighting | Control Stations | Motor Starters | Heat Trace | Gas Detection | Flame Detection | Process Instrumentation | Process Heating | Ventilation Fans | Security Access ControlÂ
Competitive Prices | Extensive Stocks | Technical Support | Express Delivery
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Published 13 Mar 2020
Press Release Date: 02.04.2020 uploaded by Chris Dodds (T&D Sales + Marketing Manager) World’s First Fully Certified ATEX Doors Thorne & Derrick International, the Experts in Equipment for Explosive Atmospheres, today announce the signing of a Commercial Distribution Agreement...
Published 04 Jul 2019
Press Release Date: 04.07.2019 uploaded by Chris Dodds (T&D Sales + Marketing Manager) Category: Stockist Distributor Agreement Announcement Thorne & Derrick International announce that they have signed a Preferred Distributor Agreement with Raytec, the world leading manufacturer of LED...
