The Gland is an essential element in electrical installations. Stay up to date with current New Products, and diverse applications and specific solutions for cable glands. Or refresh your basic knowledge. This article offers you comprehensive expert knowledge of the manufacturers. 

Contents

• Cable glands from the modular system
• Push-in cable gland without counter nut
• Variable cable gland for shielded cables 
• Separable cable gland for Ethernet cables
• Pioneer with lead-free brass cable gland
• Cable gland closes EMC gaps with high damping
• Cable gland for process industry defies acids and bases
• Robust cable gland for sensitive industries
  
• Archive for cable glands
  
  
• Cable gland basics
  • What is a cable gland?
  • Which cable glands are there?
  • What is a tank thread or what does PG mean?
    
    

Cable glands from the modular system

27.09.2023 | Kaiser presents the Progress series from Agro, a versatile modular system for freely combinable cable glands. This includes components made of nickel-plated brass with short or long connection threads in all common sizes with metric, Pg, gas pipe or NPT design.

For the upper parts you can choose between standard pressure nuts, clamping jaws and cable outlets with trumpet and kink protection. The temperature range extends from -40° to +100°C. Various sealing inserts are available in short, one- or two-piece and long, continuously insulating versions NBR and TPE.

Particularly temperature-resistant seals are for ambient temperatures up to +200 °C Available together with sealing inserts for multiple feedthroughs of cables with the same diameters and holes of different sizes.

The special Progress compression technology offers a high level of sealing and cable-friendly strain relief. When the pressure nut is tightened, the seal forms a bead. This ensures that the screw connection achieves a degree of protection IP 68 or IP69K. There are sealing inserts certified according to EN 45545 and NFPA for use in rail vehicles. Versions made of plastic and stainless steel A2/A4 as well as explosion-proof Progress cable glands complete the range.

Push-in cable gland without counter nut

05.04.2023 | The new cable gland ESKV-P in IP protection class IP68 from wiska comes without a counter nut. So no thread is required and the housing does not have to be opened.

Variable cable gland for shielded cables

07.09.2022 | Agro offers Progress Easy Connect Multi a variable, easy-to-assemble cable gland with which shielded cables with different cross-sections can be quickly and easily inserted into the housing using just one gland with a safe shield tap.

The cable gland, which can be installed in just a few simple steps, is suitable for Cables different diameters with interrupted or partially exposed, continued braided shield. The cables remain rotatable, slidable and removable during the assembly process.

The screw connections are made of brass nickel manufactured. They are available with customized sealing inserts on request. A contact spring made of stainless steel 1.4310 that protects the braided shield enables powerful clamping and excellent discharge values.

The Easyconnect Multi system has one Strain Relief according to DIN EN 62444 version A and the standard version is suitable for a temperature range of -60° to +100 °C. When using FPM sealing inserts, the temperature range increases to -40° to +200 °C.

Kaiser exhibits at the SPS 2022.

Separable cable gland for Ethernet cables

01.07.2022/XNUMX/XNUMX | the Power Supply over Ethernet (Power over Ethernet, PoE) is used in systems that require little power. The divisible cable gland UNI Split Gland M20 from Pflitsch is used for space-saving cable entry and sealing of Ethernet cables with RJ45 Plugs into the housing of network-enabled devices.

The PoE applications such as IP telephones, servers, small hubs or cameras, network-capable devices that require little power are supplied with power via the eight-wire Ethernet cable. Separate cables for the power supply are therefore superfluous. This reduces installation effort and costs. These space-saving, divided cable glands are particularly suitable for outdoor applications that need additional sealing and protection against vandalism. 

Conventional M20 cable glands are too small for an RJ45 connector. the M20 UNI Split Gland is divisible: During installation, the ready-made network cable with plug is routed through the housing bore. The sealing insert and the split cable gland are then placed around the cable and the housing bore is thus sealed.

Single Pair Ethernet | for IIot and Industry 4.0

The split fitting body and compression screw are securely locked together upon installation. If the cable glands are to be dismantled, both halves can be easily unlocked with a screwdriver. The UNI Split Gland is in IP Degree of protection IP 67 designed and achieves a strain relief up to class A according to DIN 62444.

More than 100 sealing inserts for cable glands

The UNI Split Gland cable gland is based on the UNI Dicht principle. It seals securely without irreparably constricting the cable sheath. The soft, large-scale contusion of the sealing insert, the applied seal in the dividing plane and another one on the connection thread also have protection class IP 67 according to EN 60529 and type 4 or type 4 X.

Polyamide for electromobility and industrial applications

Well over a hundred sealing inserts are available for different cable cross-sections and requirements. With the Multiple sealing inserts several cables, even with different outer diameters, can be routed through a screw connection to save space. There are inserts for flat and special cables. The manufacturer's principle of "punching as required" matches the sealing inserts to the number and outer diameter of the cables used.

The UNI Split Gland are out Polycarbonate manufactured. They are available in thread sizes M20 to M32 and in M25 HD made of die-cast zinc. The heavy-duty version is designed for increased mechanical requirements. The temperature range is -20° to +80 °C.

Pioneer with lead-free brass cable gland

20.04.2022/XNUMX/XNUMX | The EU Commission is working on new ones Materialregulations in the european Rohs Policy (Restriction of Hazardous Substances). Experts assume that the use of lead in copper alloys, such as in the manufacture of cable glands, will be banned in future. Previously, there was an exception that allowed a share of up to 4%.

Also in the Reach Chemicals Regulation (Regulation concerning the Registration, Evaluation, Authorization and Restriction of Chemicals), lead is on the list of "Substances of very high concern" (SVHC), which could be banned in the future. Although Rohs and Reach come from Europe, they also have an influence on international guidelines such as the California List in the USA or the Rohs Directive in China.

Single Pair Ethernet: SPE Technology News from Harting

Made with the Skintop cable glands lead-free brass is there a sustainable and future-oriented alternative, because Lapp didn't want to wait until the addition of lead was officially banned. "Early preparation and planning is essential, especially for global manufacturers who rely on a long service life for machines and systems and whose value chains span several countries," emphasizes Sebastian Maier, product manager at UI Lapp GmbH.

Easy transition from PG sizes and PG threads

In addition to the Skintop MS-M and MS-SC-M models and the Skindicht SM-M counter nut (metric sizes M12, M16 etc. to M63), Lapp is now offering its Skintight Lead Free series before. This includes blind plugs, extensions, reducers, adapters and lock nuts. The lead-free products with the LF identifier in the article number have the same product properties as the variants with a small amount of lead added.

The Adapter Skin seal MA-PG/M allows the easy transition from a PG thread (armoured thread) on the outside to a metric internal thread at temperatures of up to +200 °C. The adapter is designed for sizes up to PG thread 36 or M40.

There is the to close an unused metric threaded hole on the housing Blind plug Skin Tight BL-M, also up to +200 °C and the BL-M hex up to +100 °C. The PG cable gland and metric adapter were designed for high chemical and mechanical loads and are suitable for outdoor use. The simple installation is easy with a slotted screwdriver or open-end wrench. A fitted O-ring seals the threaded hole/through hole in a liquid-tight manner. This results in the Degree of protection IP68.

Tool-free and safe cable entry and entry

With the reduction Skindicht MR-M, the size difference between the connection thread of a cable gland and the threaded hole in a housing correct. Because the cable gland is independent of the threaded hole in the housing, the selection is very flexible. The variant skin seal MR-M hex with mounted O-ring enables the higher degree of protection.

For a metric cable glandwhose connecting thread is larger than the existing threaded hole, the extension Skindicht ME-M is suitable. It corrects the difference in size and withstands high chemical and mechanical loads.

For EMC applications the counter nut Skindicht SM-PE-M is predestined. It optimally contacts a coated housing for protection against electromagnetic interference and equipotential bonding. When tightening the lock nut, contact is made by the cutting edges, which scratch the coated surface of the housing.

Cable gland closes EMC gaps with high damping

03.12.2019 | Where signal and power cables through a housing wall, there is a gap in the shielding through which electromagnetic waves "slip". In order to safely close this gap in the shield, high-quality EMC cable glands are required. Pflitsch has presented a cable gland with the "Blueglobe TRI" series that optimally shields the cable shield when the cable enters the control cabinet.

Interface and industrial connector innovations from Harting

It is also reliable, can be installed quickly and easily and guarantees the highest damping values. This enables the core element that patented TRI spring, by Pflitsch. With its geometry, it ensures a large-area, low-impedance and long-lasting 360° contact with the cable shield. This even applies to non-round or off-centre lines. This EMC cable gland offers maximum signal security with over 80 dB at 100 MHz and 65 dB at 1000 MHz. In addition, the accredited test laboratory GHMT tested the Blueglobe TRI cable gland according to Cat. 7A tested and certified.

The hygienic cable glands from the Blueglobe TRI Clean Plus series are available for hygienic or design applications in stainless steel, designed according to the demanding EHEDG standard and according to BGN specifications.

If the braided shield is exposed, the cable can simply be pushed through the Blueglobe TRI. The triangular spring is immediately placed securely around the braided shield and already guarantees EMC protection without tightening the pressure screw. Pflitsch separates the shielding mechanically from the seal and takes care of it more contact security. With this EMC cable gland, the cable sheath only needs to be removed at the contact point. The design of the TRI spring prevents it from getting caught in the mesh.

In addition to the HF attenuation is the ampacity an important criterion for an EMC cable gland. In tests, the Blueglobe TRI achieved a higher current carrying capacity than the shielded cable. They are available in sizes M12 to M85 for shielded cables with a diameter of 5 to 77 mm. The cable glands achieve the high protection classes IP68 (up to 15 bar) or IP69, Type 4X. They are approved for temperature ranges from -40° to + 130 °C, in the high-temperature version -55° to + 200 °C.

Exhibit on the SPS

Cable gland for process industry defies acids and bases

03.06.2019/XNUMX/XNUMX | With the youngest member of the “Variapro” family, things are turning Bumblebee to the process industry. The Variapro FKM cable gland is designed for applications in the chemical, pharmaceutical or biotechnology industries. It is particularly resistant to acids and chemicals. Specifically, this involves aromatic and chlorinated hydrocarbons, mineral oil and petrol, but also oxygen, ozone and water vapour.

Come with these cable glands sealing inserts made of FKM. This material has proven itself very well in numerous tests. The screw connection is designed for a temperature range of -20⁰ to +180 ⁰C. The screw connection with protection class IP68 up to 10 bar is also impressive when it comes to tightness.

With its slim structure, it meets the requirements for space-saving installation. Ease of assembly and EMC connection in the standard version are additional features. The brass housing is nickel-plated. The new cable gland is initially available in four sizes: M20, M25, M32 and M40. By intelligently linking sealing inserts and reducers, Variapro FKM can accommodate cables with diameters from 7 to 32 mm.

Robust cable gland for sensitive industries

20.02.2019/XNUMX/XNUMX | Focused with the new cable glands of the "Variapro" series Bumblebee demanding markets with special challenges. There are currently four variants that have been designed for special industry-specific requirements. What they all have in common is the robust design and excellent tightness (IP68 up to 10 bar). Added to this is the integrated EMC connection as standard.

The "Variapro Rail" series meets all the requirements for use in the Rail transport. It has successfully passed the tests of the fire protection standards DIN EN 45545-2 and 45545-3 and fulfills the fire resistance class E30. This means that the screw connection can be used without restriction in all trains on the European route network.

The "Variapro Temp" series withstands extremely low temperatures as well as applications in the immediate vicinity of very high temperatures. It covers a temperature range from -60⁰ to +200⁰C. This makes it suitable for outdoor applications in an arctic climate or for use in cold stores and cooling systems. The demand for High temperature applications always comes from the industrial environment.

Cables and lines for control, fieldbus, data & Co.

The "Inox-HD Pro" cable glands master hygienically sensitive tasks. EHEDG certified will you in the Food industry as well as in chemistry and pharmaceutical industry deployed. The specially designed stainless steel housing meets the highest hygiene standards and all requirements for residue-free cleaning of bacteria and microorganisms.

Cable gland basics

What is a cable gland?

An Gland leads Cables through a housing, a switch cabinet or similar and protects the interior from dust, mechanical influences or moisture through a special seal.

Which cable glands are there?

Selecting the right cable gland depends on the specific requirements of the application, cable type and environmental conditions. There are different types of cable glands made of metal, brass, plastic or stainless steel:

1. Standard-Cable glands are usually made of plastic or metal and are used for general applications.
2. EMC-Cable glands offer electromagnetic compatibility and shield disruptive electromagnetic fields.
3. Explosion-proof Cable glands are designed for use in potentially explosive areas.
4. Shop-Cable glands are specifically used for applications where cable entry must be at a specific angle.
5. Telescope-Cable gland screws together several cables of different sizes.
6. Pressure equalizations screw connections prevent the formation of condensation in housings by equalizing pressure.

What is a tank thread or what does PG mean?

The armor thread, often referred to as PG for short, is a metric thread that is primarily used in the field of electrical engineering. It was originally introduced in Germany and was used to attach fittings to electrical installations, for example for cable glands or cable entries in housings. The PG thread has a tapered profile with a coarse pitch. The term “armoured thread” goes back to the historical use of the thread for armored pipes. The nomenclature table for PG threads is standardized according to DIN 40430 and begins with "PG" followed by a number that indicates the approximate outside diameter of the thread in millimeters, e.g. B. PG 7 or PG 48. Although the armored thread is still common in some areas, it has been replaced by metric ISO threads in many applications, especially in an international context. Armored threads and metric threads are not compatible with each other.

Source: This article is based on information from the following companies: Agro, Hummel, Kaiser, Lapp, Pflitsch.