Industrial Socket-Outlet 20 A / 32 A
The RETTBOX® range provides an ideal solution for power and compressed air supplies to light goods, fire and rescue vehicles, offering automatic ejection of the coupler socket upon starting the vehicle.
RETTBOX® S is the brand new device of the RETTBOX® range by MARECHAL® ELECTRIC. The best-in-class industrial socket-outlet with automatic self-ejection providing power to all equipment on-board a vehicle.
MARECHAL® is synonymous with innovation. All their solutions are patented to guarantee safety for end-users (self-ejection, ingress protection, weather and temperature resistance, high-quality materials, protection from live parts IP2X/IPXXB).
MARECHAL® connectors have spring-loaded contacts with silver-nickel tips. This ensures exceptional connection quality and eliminates wear and tear from arc flash and repeated
operations over time, typically seen in pin and sleeve technology. Silver, even when oxidised, guarantees optimal conductivity. Contact quality is maintained even in the presence of vibrations and temperature changes, thanks to the tight pressure of the spring-loaded contacts.
The system comprises a flush-mounted glass-reinforced thermoplastic box recessed into the vehicle body frame. The system includes a sliding cover as well as a MARECHAL® plug and socket device with silver-nickel butt contacts.
When the vehicle is starting up, an electric lifting magnet sends an impulse to the trigger hook of the socket which is automatically ejected.
RETTBOX® S (from 20 A to 32 A) offers load-breaking capacity and automatic ejection upon start-up of the vehicle. It is also available with air, to power the pneumatic equipment when the vehicle is stopped, particularly the brake system.
A Unique Solution With Multiple Benefits
Technical Features
| SAFE RETTBOX® S was engineered to provide a better choice for self-ejection. LED indicators make it easy to monitor voltage presence and charging status. |
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SIMPLE RETTBOX® S user-friendly design ensures robustness, performance, and ease of installation. Our goal is to simplify the work of end-users, contractors, and vehicle body converters. |
| SMART RETTBOX® S was engineered to provide a better choice for self-ejection. LED indicators make it easy to monitor voltage presence and charging status. |
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Time & Cost Saving:
Space Saving:
Possible Configurations
| WITH AN EXTERNAL CHARGER – POWER SUPPLY WITH 12 V DC OR 24 V DC |
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| WITH AN ON-BOARD VEHICLE CHARGER – UP TO 480 V AC POWER SUPPLY |
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| OPTION – A yellow LED battery charging indicator light |
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Thorne & Derrick, Experts in Equipment for Explosive Atmospheres, are Specialist Distributors of Marechal plugs & sockets in the UK including ATEX and IECEx certified decontactors for LV electrical power distribution.
The range of Marechal plugs and sockets are available in a range of current ratings, switching capabilities, voltage supply and hazardous area certifications (according to ATEX & IECEx) for safe use in potentially explosive atmospheres – this includes Zone 1 & Zone 2 (Gas) and Zone 21 & Zone 22 (Dusts).
Panels | Plugs | Isolators | Enclosures | Lighting | Control Stations | Motor Starters | Heat Trace | Gas Detection | Flame Detection | Process Instrumentation | Process Heating | Fans | Security Locking & Access Control
Suitable For Explosive Atmospheres
Mita offer 4 main resin types to accommodate the requirements of various hazardous and industrial applications which can be chemically aggressive, demanding heated environments.
Thorne & Derrick together with Mita® can offer an extensive range of GRP cable support solutions that are suitable for any kind of application including non-metallic troughing, GRP cable ladders, CABSYS cable trays, ducts, cable support channels and Fibastrut as the brand continues to lead the industry towards a sustainable future for a wide range of low (LV), medium (MV) and high voltage (HV) cable installation applications.
The polyester type 1 carbon loaded referenced as PY1C is a type that has anti-static properties at it contains carbon powder. It therefore, requires grounding. Suitable for onshore and offshore oil and gas applications which are classified as explosive atmospheres.
PY1C Standards & Approvals
In 1988, Mita Holdings Ltd was born. In a short while, the company became a leading manufacturer of corrosion resistant industrial cable support products in the UK. In 2005, the company was acquired by Schneider Electric under the name of Mita (UK) Ltd. Mita name continued as a range name under the Schneider Electric brand. Finally, in 2021 the cable support division is acquired by the Swedish group, Storskogen, and is reborn as a stand alone company, Wibe Group.
MitaR is back as a leading brand in GRP cable support solutions. MITA brand is now powered by Wibe Group.
MITA have been supporting customers through their technical journey on choosing the correct product, manufactured from GRP, in cable support applications for almost five decades. MITA are now fully separated operationally from Schneider Electric. They now have a stand alone presence in the UK market with their “Made in UK” products which are fully compliant to the related cable management standards.
Self Ejecting Systems
Marechal plugs & sockets are available with a self-ejecting option this ensures that they are safely disconnected when a vehicle or portable equipment is moved. As a result workers are protected from electrical hazards, equipment damage is prevented and maintenance costs are reduced.
Marechal, a world leading manufacturer of Electrical Safety Plugs & Sockets have innovated self-ejecting plugs and power connector systems designed to protect people and plant from electrocution caused by accidental or intentional disconnection of power supply.
Self-ejecting plugs & sockets avoid the need to disconnect electrical equipment, allowing a mobile device to be moved without unplugging it, or where equipment is located in high-risk areas.
Marechal Self Ejecting Plugs. B = box, Sl = sleeve, S = socket outlet, I = inlet, Me = mechanism, H = handle and C = cord.
A Marechal plug can be ordered with self-ejecting features. When a self-ejecting female connector is ordered, the standard pawl on the connector is replaced by a shark’s fin pawl. When the device is installed, the pawl is attached to the power cable via a tension cord. Then if the connected equipment is moved, the tension cord lifts the shark’s fin pawl and the connector is ejected before damage can occur.
When a self ejecting male plug is ordered a shark’s spin mechanism is added to the plug. During installation, a tension cord is attached from the shark’s fin to the power cable. When tension develops in the power cable, the shark’s fin mechanism lifts the standard pawl on the female socket and the plug is safely ejected.
Self-ejecting connections are commonly used on truck hook-ups, cranes, railroad cars, refrigerated food carts, delivery vehicles, and other portable equipment.
Please note: That the self-ejecting feature requires modification to the socket that allows straight insertion and disconnection. Plugs and sockets modified for straight-insertion or self-ejecting are not Switch-Rated.
There are many applications where Self Ejecting Systems are a valuable asset:
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Minimise Equipment Damage
Self-ejecting plugs and sockets are designed to protect electrical system equipment from damage in the event of drive-away or drive-by snagging of a power cable. The ejection of the connector ensures there is no damage to the inlet, trailer, power cord or control panel.
Protect User: Safety First
Drive-away damage can leave trailer/mobile equipment inlets in an unsafe condition and result in live conductors being exposed on supply side/loading dock equipment, posing unexpected shock or arc flash hazards for subsequent users.
Improved Reliability & Uptime
Drive-away damage not only puts loading docks, supply trailers and other equipment out of commission until necessary repairs can be made, but may also affect the production or supply operations they are intended to serve.
Cost Reduction
One drive-away event can destroy the trailer inlet and mounting, the connector and power cable and the control panel, resulting in thousands of pounds of equipment damage and significant maintenance work for repairs.
Guidance Notes On Workplace Electrical Safety
“Cables, plugs, sockets and fittings must be robust enough and adequately protected for the working environment. Ensure that machinery has an accessible switch or isolator to cut off the power quickly in an emergency.”
| 20A / 32A RETTBOX® ONE WITH OR WITHOUT AIR |
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20A / 32A RETTBOX® S WITH OR WITHOUT AIR |
| 20 A > 150 A SELF-EJECTION DECONTACTOR™ |
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OPERATION SEQUENCE
Self-ejection systems avoid damage to the electrical installation when the mobile equipment is moved without removing the supply connection. They are designed to automatically release the mobile socket outlet or inlet thanks to a cord attached to the locking latch and the power supply cable.
Fixed Electric Power Supply
Step 1: Self-ejection system at rest.
Step 2: The traction acts on the electrical cable and the rope. The ejection lever gradually raises the latch.
Step 3: The latch is fully raised by the ejection lever, causing the automatic ejection of the plug.
Thorne & Derrick, Experts in Equipment for Explosive Atmospheres, are Specialist Distributors of Marechal plugs & sockets in the UK including ATEX and IECEx certified decontactors for LV electrical power distribution.
The range of Marechal plugs and sockets are available in a range of current ratings, switching capabilities, voltage supply and hazardous area certifications (according to ATEX & IECEx) for safe use in potentially explosive atmospheres – this includes Zone 1 & Zone 2 (Gas) and Zone 21 & Zone 22 (Dusts).
Panels | Plugs | Isolators | Enclosures | Lighting | Control Stations | Motor Starters | Heat Trace | Gas Detection | Flame Detection | Process Instrumentation | Process Heating | Fans | Security Locking & Access Control
Thorne & Derrick | Stockists & Key UK Distributor
Uploaded by Natalie Lundie | Supply Chain: Marketing Lead at Thorne & Derrick
No Time for Downtime
Thorne & Derrick, the UK’s leading Specialist Distributor of Eltherm UK Ltd’s Electrical Process & Trace Heating Solutions were approached by a large UK based Data Centre who required a frost protection trace heating system for their chilled water lines. The solution needed to prevent the chilled water lines from freezing and the room from overheating which in turn could lead in the devastating loss of data.
The strategic partnership between Thorne & Derrick and Eltherm UK Ltd has proven to be successful, with the two companies serving clients in the commercial, industrial and hazardous area industries with their heat tracing cable and system requirements.
This recent order received by Thorne & Derrick is a direct result of the referral process established between the two companies earlier this year. The client was referred by Eltherm UK Ltd to T&D’s technical team who serviced the order within 48 hours!
Thorne & Derrick’s focus is on providing electrical heat tracing systems that are reliable, efficient and effective in a timely manner. Our in-house expertise means that we can provide expert advice and design bespoke solutions to meet your specific requirements.
With almost 40 years experience in designing and delivering over 3 million metres to complex systems and major projects worldwide, we understand that downtime can be costly, and our goal is to provide our clients with solutions that minimise downtime and maximise uptime, ultimately optimising revenue and profitability.
Thorne & Derrick are the UK’s largest stockist and supplier of Industrial & ATEX Trace Heating Systems for heating of pipework, tanks, drums and vessels.
How Does Heat Tracing Work In A Data Centre?
Data Centres house a large number of servers, which generate a significant amount of heat. Our internet connection is an umbilical, online life-line, to the outside world connecting friends, families and business so the stability of their facilities is crucially important.
If the temperature in a data centre becomes too high, it can cause equipment to fail, resulting in data loss, downtime and financial losses for businesses. Room cooling can be inefficient and expensive. Heat tracing prevents chilled water lines from freezing and the room overheating.
In this instance, this Data Centre had a particularly large amount of chilled water lines to ensure all their critical IT infrastructure can be kept cool. The IT equipment generates a significant amount of heat, so the chilled water lines play a crucial role in removing this heat and maintaining a consistent temperature. So the trace heating in this application is essentially being used to prevent the chilled water from freezing.
T&D’s Application Engineers supplied Eltherm’s ELSR-N and ELSR-W self-regulating heating cables. Ideal for this application as the ELSR cable has the ability to adjust its heating output in response to changes in ambient temperature. This will ensure that the chilled water lines are always kept at the desired temperature without overheating.
Once installed it will keep the chilled water lines free from frost and prevent any damage to their IT equipment. This particular cable is also suitable for use in hazardous areas and could be installed in within battery rooms should there be one on site zoned ATEX.
Thorne & Derrick were able to supply the cable from stock and 48 hours from the initial telephone consultation the cable was delivered on site.
Versatile self-regulating heating cable ELSR-N is suitable for freeze prevention & temperature maintenance in the low temperature range of industrial applications and is also approved for use in hazardous areas
The Agreement signed earlier in the year is supported by a record investment in stock levels with over 150 kilometres of cable ordered by Thorne & Derrick allowing us to be agile and quickly meet the needs of our customers as displayed in this particular case study.
Adam Rowe Technical Sales Engineer at Thorne & Derrick commented “Since the Agreement, our collaboration with Eltherm has already led to some successful projects wins thanks to the referral scheme. Looking forward to visiting Eltherm Germany’s HQ for product training in the new year. Even though I have 17 years experience in the industry there’s always room to learn more!”
Mark Wood Quote……………………………….
There are no shortcuts when it comes to mission critical operations like data centres. Fortunately, there are very practical, efficient and easily maintained solutions for keeping data centres cool and performing their best year around.
Here at Thorne & Derrick we understand the Data Centres require a significant amount of cooling to operate, and that heat tracing systems will prevent any unwanted freezing and keep your chilled water system healthy and happy even in the coldest weather conditions.
We can assist with the Competitive Supply & Technical Specification of trace heating systems and solutions to keep your facility operational, whatever the weather.
Since 1985 we have been providing expert technical support, competitive prices and an international delivery service for leading manufacturers of trace heating cables.
Our Team of Trained Sales Engineers are available to advise and support all your Trace Heating enquiries.
Thorne & Derrick provide a complete portfolio of Electric Process & Trace Heating Solutions for Industrial, Hazardous Area & Explosive Atmospheres,
Thorne & Derrick, Experts in Equipment for Explosive Atmospheres, are the largest stockist and supplier of Eltherm UK Ltd cables and electrical heating products in the UK including ATEX and IECEx certified electrical heating products.
Product Upgrades
Thorne & Derrick are pleased to announce that Raytec (world leaders in LED lighting for hazardous area environments) have recently made some upgrades to their SPARTAN Flood and Bulkhead products.
In the short article below Raytec explore some of the improvements in performance and efficacy of the SPARTAN hazardous area lighting range.
The introduction of the SPARTAN Mid Power Flood, combined with upgrades to the existing range, means Raytec now offer a comprehensive range of well-engineered, cost-effective floodlight solutions across a broad range of lumen outputs from 2,250 to 25,000 lumens.
See the full product index for the SPARTAN range here.
LED upgrades to the SPARTAN FL range, including the FL24 and FL48 Flood, have allowed us to increase the lumen output by an impressive 70%. Let’s compare the existing FL24 and FL48 products with the new updated versions, using the Zone 1 variants as an example;
| Old | New | |
| FL24 | 5,000lm / 68W | 8,450lm / 68W |
| FL48 | 10,000lm / 136W | 16,900lm / 136W |
| Efficacy | 74lm/W | 125lm/W |
| 70% improvement in lumen output and efficacy | ||
With these upgrades, the FL24 and FL48 Flood products will remain an important part of the SPARTAN portfolio; leading the floodlight range for emergency performance, as well as providing low voltage, extra low voltage, and DC solutions.
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| Raytec Spartan SPX-FL24 ATEX Floodlight | Raytec Spartan SPX-FL48 ATEX Floodlight |
Raytec have also made some improvements to the SPARTAN Bulkhead range with an LED upgrade which improves performance and efficiency. The upgraded LEDs have helped to reduce power consumption by 40% while maintaining the same light output.
| Old BL24 | New BL24 | |
| Standard Variant | 2,500lm (34W) | 2,500lm (20W) |
| Efficacy | 74lm/W | 125lm/W |
| 70% improvement in lumen output and efficacy | ||
They’ve also introduced an innovative new bracketry solution to the existing Bulkhead platform. The new bracket allows full rotation of the luminaire and delivers a cost-effective floodlight – the SPARTAN BL24 Flood.
The BL24 Flood replaces the existing SPARTAN FL12, which has now been made obsolete. In addition, a high-output version of the BL24 Flood, delivering 4,250lm, is also now available.
| Old BL24 | New BL24 | New BL24-HO Flood | |
| Standard Variant | 2,500lm (34W) | 2,500lm (20W) | 4,250lm (34W) |
| Efficacy | 74lm/W | 125lm/W | 125lm/W |
| 73% improvement in efficacy | |||
Raytec Spartan BL24 | Zone 1 Bulkhead Light Hazardous Area 2,500 Lumens
The 10,000 and 15,000lm variants of the High Power Flood and Bay luminaires have now been discontinued due to the release of the new Mid Power Flood and Bay variants, which offer the same output but as a more cost-effective and installation-friendly solution.
Available with dedicated Flood and Bay bracketry, the new Mid-Power luminaires provide users with great flexibility and are ideal for a wide range of applications. The SPARTAN Mid Power Flood and SPARTAN Mid Power Bay luminaires are fully certified for Zone 1/21 and Zone 2/22 hazardous areas, including ATEX, IECEx and UKCA.
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...
