KoCoS adds ARTES RC4 relay tester with more outputs

KoCoS Messtechnik AG has launched the ARTES RC4, a new compact protection relay testing system for mobile and on-site use. The upgrade adds more current power, an extra voltage output and new transistor binary outputs to expand testing options for grid, plant and renewable-energy applications.

Why it matters: - The ARTES RC4 gives protection relay technicians more flexibility in the field. - The added outputs expand testing options for grid, plant and renewable-energy protection systems. - The new system builds on the ARTES RC3 while keeping a compact, mobile form factor.

What happened: - KoCoS Messtechnik AG introduced the ARTES RC4 as the next generation of its compact protection relay testing system. - The launch was announced July 7, 2026, in Korbach, Germany. - The ARTES RC4 is designed for simple and reliable testing of protection relays.

The details: - The ARTES RC4 retains a robust hard-shell carrying case, compact construction, and precise measurement and amplifier technology. - The system continues to offer intuitive operation for field applications. - More powerful current outputs extend protection relay testing capabilities and increase overall flexibility. - Protection relays with a rated current of 5 A could already be tested with the RC3, and the ARTES RC4 adds more power reserves and expanded testing options for those applications. - An additional voltage output extends the range of uses, including earth fault testing. - New transistor binary outputs enable fast simulation of control signals and targeted activation of devices under test. - Optimized binary inputs are arranged in two separate groups with two measurement inputs each for flexible signal acquisition and evaluation. - The ARTES RC4 is built for mobile use in protection relay testing, including grid and plant protection relays. - The system is intended to support reliable on-site testing, especially in the renewable energy sector.

Between the lines: - KoCoS is signaling that protection relay testing is moving toward more capable portable systems, not just bench equipment. - The company is keeping the core ARTES operating concept intact while adding power and I/O capacity, which suggests an upgrade path for existing users. - The focus on renewable-energy applications points to growing demand for field testing in distributed power systems.

What's next: - KoCoS says technical details and further information are available on the KoCoS Messtechnik AG website. - Customers and integrators will likely evaluate whether the RC4's added outputs justify a move from the RC3 for more demanding field tests.

The bottom line: - The ARTES RC4 is a more capable portable relay tester aimed at expanding on-site protection testing without sacrificing the compact design of the previous generation.