Ground fault protection, specialized testers, and measurement equipment
Comprehensive anti-shock and ground fault solutions for 3 kV DC railway infrastructure. We limit stray currents and ensure safety.
Discover our reliable products
Our products protect across Europe, ensuring the highest level of safety and reliability for railway infrastructure..
Overcurrent relays tester TPN
Rectifier voltage distributiontester TRN
TZZ Voltage Limiting Device Tester
TOZ2 Voltage Limiting Device Tester
Our services
Professional solutions tailored to your needs
Consulting
As professional advisors and market leaders, we support our customers in choosing optimal solutions, providing expert advice on the use of our equipment.
Consultations and expert opinions
We support our customers in matters related to the reduction of stray currents in the current circuits of DC traction power supply systems (railways, trams, subways), as well as in AC circuits related to electric traction, which applies to MV and HV substations.
Service
Warranty and post-warranty inspections of control and measurement devices manufactured by us, and issuing calibration certificates for these devices.
Products are not everything
We support our customers
We conduct training courses
Wykonujemy badania, przeglądy i ekspertyzy
Why us?
For over 30 years, we have been providing solutions for electric shock and ground fault protection for 3 kV DC railway infrastructure.
Experience
Time savings – quick diagnostics and simpler system maintenance. Over 30 years of experience in the railway industry, hundreds of successful implementations, and proven solutions used throughout Poland.
Quality
Products designed and tested in our laboratory, compliant with current standards and railway market requirements.
We have been on the market for a long time.
KOLEN has been operating since 1992. We specialize in issues related to earth fault and electric shock protection, as well as the reduction of stray currents in the vicinity of DC traction systems.
Establishment of KOLEN
The establishment of KOLEN, which became the foundation of our mission to provide specialized solutions for railway energy.
Technology Development
We started our business by launching our first products: TZD-1N and TZD-1R one-way limiters and the TCK cable continuity tester, which was our first step towards building a comprehensive product range.
Would you like to learn more about our history?
Show moreLet’s talk about cooperation
Write or call us – we will discuss your requirements and propose optimal solutions.