The Electrotipp : Cover story

Long-term Waterproof Connectons:

DK Cable Junction Boxes „Waterproof“ for Encapsulating
Have you grabbed the copy of the new  Electrotipp???  (Electrotipp is the official technical Newsletter from Hensel)

Relax, we help you with the latest technical innovation from the House of Hensel;

Time and time again, electricians come across installation environments whereby the ingress of water into an enclosure must be safely excluded. Even enclosures which have a high degree of protection cannot guarantee this.

In all high-sealed housings, condensation can form, which can, depending on the amount, result in harmful damage to the electrical device.

In application areas with e.g. risks of flooding, where any ventilation measures to prevent condensation should be avoided, the high degree of protection is not a reliable solution.

Which applications require waterproof cable connections?

• Pump shafts / stations Ground-level installation ducts or shafts in outdoor areas
• Ground-level unprotected outdoor installation
• Unprotected outdoor installations which are close to the ground
• Flood areas close to rivers or marinas.
• In extreme environments with constant high humidity

Why is the IP degree of protection alone not sufficient?Even housings with high degree of protection can not safely exclude the ingressof water and dust. All IP ratings allow for example ingress of water into a housing in a non-harmful quantity Under extreme environmental conditions, for example, the accumulation of condensation may result in damage to the electrical installation or devices or cause these to malfunction. Ventilation measures will often suffice to prevent harmful condensation from forming. In many cases, however, ventilation is not possible, e.g. because the cable junction boxes are installed close to rivers and water could enter through the vent holes.

ConclusionUnder extreme conditions even an IP68 cable junction box cannot prevent harmful accumulation of water inside by condensation. Absolute water tightness is only guaranteed if the boxes are encapsulated.In Germany, a standard is developed, which is described in the DIN VDE V 0606-22-100 standard.

Permanent Waterproof Cable Connections with Cable Junction Boxes from Hensel:

Hensel now offers complete product solutions consisting of cable junction boxes,suitable sealing compound and plugs that meet the requirements of extreme environments, thus ensuring the operation of the electric circuits.




The waterproof cable connection via encapsulating with a sealing compound

1. Open protective aluminum foil.Do not damage internal bag with sealing compound.
2. Remove divider between the two components of the sealing compound.
3. Mix well for three minutes the two components of the sealing compound.
4. Cut open sealing compound bag.
5. Use funnel for feeding sealing compound. The compound takes 45 minutes to process.
6. Insert plug, after the case has been completely sealed.

Benefits for electricians :

• Sealing cable junction boxes with a fast setting, permanently elastic sealing compound the ingress of water and forming of condensation is completely excluded. 
• The sealing compound features outstanding insulation properties. As the compound is transparent, it is possible for visual inspections of the installation to be carried out at any time.
• The durable elastic material is self sealing, therefore it is also easy for the electrical connections to be tested after they have been sealed.
• The sealing compound can be easily removed for repairs, subsequent installations or changes to installations. 
• Additionally the sealed cable junction boxes also offer reliable protection against shock and vibration. 
• The sealing compound does not, however, provide strain relief as it only adheres to material and does not stick together. Suitable cable entries must also be used here, e.g. Hensel ASM.

For repairs, subsequent installations or changes to installations the sealing compound can be easily removed:- Take off lid and
- remove sealing compound

To know more about the range and available sizes for the junction boxes from Hensel, please write to us on info@hensel-electric.in or grab a copy of the new Electrotipp 2012 . You can also subscribe for the Electrotipp by sending us an email on info@hensel-electric.in