Cabling accessories are indispensable for enclosures

Systems accessories for cabling are key to many enclosure installations, but it is important that that these accessories meet the same requirements as those that apply to building the panel, as Emma Ryde, Rittal product manager for industrial and outdoor enclosures, explains.

Protecting critical equipment is a key role of any enclosure installation, ensuring the switch and control panels protect electrical devices in hostile environments. They prevent damage from moisture, dust or contact. But that is not enough. Accessories are often used for ease of use and to make the assembly of panels simpler and clearer. These usually originate from the user. It is important

Various materials are available for Rittal’s VX25 add-on unit series to keep electrical and pneumatic components separate from each other. Think of rail systems, mounting profiles, system chassis and mounting rails.

Non-electrical parts and appliances that do not belong directly to the electrical equipment cannot simply be placed within the housing containing the switchgear. Solenoid valves must therefore be kept separate from other electrical components by placing them in a separate compartment made with rail systems.

System chassis, which are used in the door of the VX25 to make optimal use of cabinet space, can sometimes also be used for the AX wall and floor cabinet series. The same applies to different mounting profiles.

Cable routing at moving parts is a key consideration. The IEC standard states that “connections to appliances mounted on doors or other moving parts are made using flexible current conductors (…), allowing regular movement of the part”. Pipes must be secured to the fixed and moving part.

Because cable hose holders have the same hole pattern as the cabinet frame of the VX25, the door profile in the AX, as well as the mounting rail and system chassis, they can be mounted there easily and quickly. The plastic cable hose makes it easy to establish a reliable connection with flexible current conductors. This also fulfils the requirement that “sufficient mechanical strength must be provided, without compromising proper functioning”.

Cable entry and IP class

In addition to cable routing, the cable entry into a switch and control panel is also important. Maintaining the IP protection class is paramount. The IP value says something about how well a cabinet can keep out threats such as dust and water. The latest standard does not allow openings in the enclosure (such as those for the passage of cables) to impair the degree of protection. 

At the same time, openings for on-site cable entry must be easy to open again. The VX25 wall cabinet has sliding metal bottom plates, which create an opening for cables. Additional provisions are therefore required for correct and safe cable entry. An elastic clamping profile seals the opening. This creates a flexible cable entry that guarantees that the issued protection class remains intact. Variants that can be made on this: a profile for cable entry between bottom plates (symmetrical) or between enclosure frame and bottom plates (rear).

Cable glands, modular cable glands or connector glands are also used for the AX wall and floor cabinets. The basic requirement is the same: maintaining the protection class.

For machines with cable tray systems it is advisable to apply additional edge protection over the parts where cables are pulled with a plastic protective edge, grommet or rounding.  Simply deburring sheet metal edges is often not sufficient to prevent damage to the sheaths of lead-through cables. 

The bottom plates of the VX25 are double-folded and have a rounded edge. This prevents a cable from being damaged when being fed-in from below. In addition, these plates are extra sturdy and resistant to bending, making a substantial contribution to the protection class.

Cable support and rails

Finally, attention must be paid to the connections of cables. They must be sufficiently supported to prevent mechanical stress on the connections of current conductors. A frequently used method is to fix the cables with cable clamps. These are available in different designs and sizes, which allows the use of a universal profile.

Also consider the slide rail for the mounting plate with the VX25 extension unit. When the plate is in its final position, these rails are – in principle – unnecessary. Nevertheless, due to the C-shape of the system chassis, they can be used for cable fixation with clamps for C-rails. These cable clamps are of course provided with a plastic part, to protect the cables from damage.

Cable fixings can also be placed in mounting rails. Cable ties are very useful for quickly securing cables to system chassis, mounting rails and profiles to the cabinet frame of the VX25. These cable ties are easy to press into the round system bore, after which it is a matter of bending and securing the cable. The cable tie is also suitable for securing cables in the cable hose holder.

Rittal Ltd

Braithwell Way, Hellaby Industrial Estate
Hellaby
Rotherham
S66 8QY
UNITED KINGDOM

+44 (0)1709 704000

information@rittal.co.uk

https://www.rittal.co.uk

More products
1 day ago
maxon is giving away a Swiss Army Knife every day in December
maxon has launched its 2023 Advent Calendar, giving away a classic Victorinox Swiss Army Knife every day in December until Christmas Eve. To enter maxon’s Advent Calendar, visit the maxon prize draw 2023 and click on the door for the corresponding day.
1 day ago
Yaskawa commits to UK with state-of-the-art facility
Yaskawa – a global technology supplier in segments drives, motion controls and robotics – is opening a new, state-of-the-art UK headquarters and manufacturing facility in Sunderland.
3 days ago
NSK bearings help pet food plant raise OEE
When a major UK pet food producer wanted better machine utilisation with the aim of raising its OEE (overall equipment effectiveness) by 3 points, it asked experts at bearing specialist NSK if they could evaluate processes and systems to help with this improvement goal.
4 days ago
Beckhoff UK and HepcoMotion’s mechatronics showcase takes centre stage
Automation technology specialist Beckhoff UK, in collaboration with leading manufacturer of linear motion systems, HepcoMotion, hosted a mechatronics showcase at MK7, the home of Oracle Red Bull Racing in Milton Keynes, with several innovations from both companies on display, as well as a brand-new product reveal – the GFX-r guidance system.
4 days ago
PPMA re-brand puts automation at the heart of UK manufacturing
The PPMA Group of Associations has re-branded and has changed its name to AutomateUK to better represent the needs of its membership and their end user customers in the ever-changing manufacturing landscape.
2 hours ago
steute Technologies restructures its business fields
steute Technologies, an international technology company offering switches, intelligent sensors and wireless systems, has announced a comprehensive restructuring of its business fields.
8 hours ago
Showcasing design, production and process engineering in the food and drink sect
Taking place on 1 May 2024 at the National Motorcycle Museum, Food Manufacturing Live serves the design, production, process and maintenance engineering teams across the UK food and drink manufacturing sector.
1 day ago
Understanding safety and security for the protection of human and machine
How do you master employee protection, liability protection, productivity and data protection? How do you increase your quality and simultaneously prevent manipulation on your machines? How do you protect your data and employees in equal measure? Pilz is hosting a free webinar on 15 December, 9:30-10:30 am, to address just these questions.
1 day ago
Schaffner opens new regional channels for its range of EMC solutions
EMC solutions provider, Schaffner, announces new partnerships with three distributors to further broaden the reach and scope of its product range and support services across Europe. The new agreements with Telerex, CATS and DSL Components will open new supplier corridors and enable customers to have local and faster access to products.
1 day ago
New SCARA robot transforms pick-and-place and assembly operations
ABB Robotics is expanding its industrial SCARA robot portfolio with the addition of the IRB 930. The new robot, compromising three variants capable of handling 12 kg and 22 kg payloads, has been designed to meet the demands of new growth opportunities in traditional and new markets.

Login / Sign up