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KOLEN - founded in 1992 - specializes in issues concerning fault to earth and electric shock protection and stray current limitation in the vicinity of DC traction system.

All manufactured products, specialized measuring instruments and test apparatuses were entirely invented and designed (starting from guidelines to the final product) by the company and some employed solutions are patented.
On next pages we try to describe functioning of the system of the earth fault protection in surrounding powering of the traction the Polish Railways, presenting his components which are our products. Also, we try to give the essential information for the contact with us.

We expect the fruitful cooperation.