Basically, cable glands are a type of devices that are used in combination with wiring and cables for automation systems, such as Telecom, data, power and lighting. The primary function of these is to serve as a terminating and sealing unit to make sure that the electrical enclosures and equipment are safe. In this article, we are going to give you a basic introduction to these units. Read on to find out more.
Environmental Protection: These units offer environmental protection through sealing the external cable sheath, which helps remove dust and moisture from the instrument or electrical enclosure.
Earth Continuity: It is used in combination with armored cables. This type of cable glands features a metallic construction. For this purpose, these products are tested to make sure that they can withstand the highest short circuit fault current.
Holding Force: They are used for better holding force to withstand the resistance.
Additional Sealing: It serves as additional sealing when there is a requirement for high level of Ingress protection.
Environmental Sealing: Cable glands are used at the entry points of the cable. The idea is to maintain the Ingress protection rating using the applicable accessories for this purpose.
Usually, these are made from metallic or nonmetallic stuff. Most of the units are resistant to corrosion. Therefore, every single unit goes through corrosion resistance tests.
If you are going to use these units in explosive environments, you may want to go for glands that are designed for the type of cable you are going to use. Given below are some of the primary features of good quality cable glands.
(1) Independent Inner Sealing
A good unit features an inner sealing principle that is different from other types of cable glands. The internal sealing ring is set apart from the armor clamping parts, which helps eliminate the possibility of over-tightening.
Conventional compression seals don’t offer direct control on how they can be used. But this type of inner sealing technique works using a displacement seal, which is controlled independently during installation.
(2) Secure Armour Termination
This termination solution can help make sure that there is permanent crimping of the armor. And this creates a low impedance connection that is free of self-loosening. The clamping ring allows you to install it without any problem. Apart from this, you can enjoy great EMC performance and Earth continuity.
(4) Outer Seal
The unique outer seal of the these glands makes sure that the seal is made around the cable properly. The outer seal is strong enough to withstand a lot of pressure under certain circumstances.
(5) Deluge Seal
The deluge seal can help prevent corrosion. This is achievable because moisture does not collect on the ring of the cable gland. Since the O ring does not receive any mechanical damage. Apart from this, it also remains safe against harmful UV rays.
In short, hopefully, this brief introduction will help you get a better understanding of cable glands.
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