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Nitrogen gas in HT Electrical Cable Manufacturing

Posted on: 30 Nov, 2013   |   With: 0 Comments
Category:  Gas Generation, Nitrogen

High tension cables (33 KV to 210 KV) are manufactured world-wide under Nitrogen atmosphere curing. MVS has supplied 25-Nitrogen Plants for such application to several countries in Asia and Middle-East.

Earlier steam curing of electrical cables was done but due to moisture present, the cable insulation always had some moisture left due to which insulation value was very poor.

Steam was replaced in curing line by dry Nitrogen gas and under Nitrogen curing now worldwide thousands of curing lines are being operated and HT cables are being manufactured.

This curing process needs continuous Nitrogen at 12 to 18-Bar pressure. MVS has successfully supplied high pressure Nitrogen generators for these requirements.

From a conventional on-site Nitrogen generator, Nitrogen is produced at 5 to 7-Bar pressure and thereafter Nitrogen pressure is boosted by a Booster compressor to 25-Bar pressure and Nitrogen is stored in high pressure tanks.

Then Nitrogen from Storage tank is used in curing line through an Automatic Pressure reducing valve. Nitrogen storage tanks take care of fluctuating Nitrogen demand and also very high Nitrogen flow required during curing line start-up when large quantity of Nitrogen used in a very short time for purging.

In such application, Nitrogen purity of 99.9% is used. Nitrogen dew point is around (-) 60°C for achieving better insulation properties.

Some of the leading names using MVS Nitrogen generators are Saudi Cables, RPG Cables, Unistar,Diamond Cables, Nuhas Oman, Gulf Cables, Sterlite Cables, LS Cables, Power Plus Cables among many others.

We offer two distinct types of Nitrogen Generators:


Membrane Nitrogen Generators –
suitable for purities up to 99.9%
Membrane Nitrogen Generators provide many benefits over other technologies such as low maintenance, very low cost of production.

(Stock image of a similar ZEN-Series Membrane Nitrogen plant with Air Compressor & Nitrogen storage tank)

PSA Nitrogen Generators – suitable for purities above 99.9%
PSA Nitrogen Generators are robust systems for producing Nitrogen of 99.9% purity or above. PSA is a very mature technology and MVS is India’s largest PSA Nitrogen generator manufacturer having supplied over 1200 Nitrogen gas generators worldwide.

(Stock image of a similar PSA Nitrogen plant)

About MVS Engineering Limited

MVS Engineering is a turnkey supplier of Gas generation equipment for Nitrogen, Oxygen and Hydrogengases. Additionally, we also manufacture Air, Gas, Liquid Dryers and also Gas Purification systems. MVS is the largest supplier of gaseous Nitrogen, Oxygen and Hydrogen plants in India. Besides India, MVS also regularly exports it’s equipment to the Middle East, Africa, South East Asia and Europe.

MVS was founded in 1977 and has supplied over 7000 Skid mounted units worldwide. Read more about the company in the About Us section of our website.

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