Catalogs >
Klüber Lubrication >
Speciality lubricants for electrical switches and contacts

Speciality lubricants for electrical switches and contacts
7Pages

Catalog excerpts

Speciality lubricants for electrical switches and contacts - 1

your global specialist Special knowledge Detailinformation Keeping contact. Speciality lubricants for electrical contacts

Open the catalog to page 1

Speciality lubricants for electrical switches and contacts - 2

Klüber speciality lubricants – always a good choice Why lubricate electrical switches and contacts? Humans and the environment – what really counts What causes the transition resistance in electrical contacts? How do lubricants work on the electrical contact? – Klüber Lubrication has more than 110 test rigs, which include standardised equipment as well as tools Klüber Lubrication has developed to regularly test the quality of its products. – roducts that last a lifetime and enable minimum-quantity P lubrication to be used help to save resources and reduce disposal quantities. – Test results...

Open the catalog to page 2

Speciality lubricants for electrical switches and contacts - 3

Why lubricate electrical switches and contacts? What causes the transition resistance in electrical contacts? Lubricants are basically insulators – nevertheless they have a positive effect on the performance of electrical contacts. Even contact surfaces that appear very smooth to the naked eye show a certain degree of roughness when seen under a microscope. Consequently, the electrically effective surface is a mere 1 % to 0.01 % of the apparent contact surface, depending on the contact force applied. It is this very small actual contact surface that is responsible for the so-called...

Open the catalog to page 3

Speciality lubricants for electrical switches and contacts - 4

How do lubricants work on the electrical contact? – onsiderably less metal oxide will form, firstly because there C is less metal abrasion, and, secondly, because the actual effective metal surface and the abrasion particles are protected against the surrounding media, e.g. air or chemical vapours, by the lubricant. A lubricant with a good backflow behaviour and wetting capacity forms an inert atmosphere around the a-spots. – he lubricant covers the open contact (during storage), thus T preventing the formation of a detrimental layer of foreign matter – lectric arcing during the switching...

Open the catalog to page 4

Speciality lubricants for electrical switches and contacts - 5

What to observe when selecting lubricants for electrical contacts How is the lubricant applied to the contact? Compatibility with surrounding materials like plastics or elastomers Depending on the manufacturing process used, the contacts leave the electroplating section in varying forms. Punched contacts are normally still connected with the copper band by a thin web. In most cases, the most economical application method is to spray the dissolved or dispersed lubricant onto the contact surfaces with a suitable concentration. Upon evaporation of the solvent, a very thin lubricant film will...

Open the catalog to page 5

Speciality lubricants for electrical switches and contacts - 6

How can you find out how effective the lubricant is on the electrical contact? Predicting exactly how effective a lubricant will be in a particular application is anything but easy - after all, there are innumerable possible combinations of materials, contact forces, contact geometries, ambient conditions etc. For the prospective series user it is therefore vital that component tests be performed under conditions that come as close to real life as possible. – riction corrosion tests with 10–90 µm friction distance for F plug-in connector systems from 2 to 100 Hz. The transition resistance...

Open the catalog to page 6

Speciality lubricants for electrical switches and contacts - 7

www.klueber.com Klüber Lubrication – your global specialist Innovative tribological solutions are our passion. Through personal contact and consultation, we help our customers to be successful worldwide, in all industries and markets. With our ambitious technical concepts and experienced, competent staff we have been fulfilling increasingly demanding requirements by manufacturing efficient high-performance lubricants for more than 80 years.

Open the catalog to page 7