The KIT MOSD is Zensol’s most advanced solution for Dynamic Resistance Measurement (DRM) and static contact resistance testing on circuit breakers, engineered for professionals who demand absolute precision, reliability and clarity in circuit breaker diagnostics.

Where traditional DRM systems rely on impulse current generators, introducing noise, timing constraints, measurement instability, impulse noise and di/dt transients, the KIT MOSD is built on a fundamentally superior principle. A precision-regulated, ultra-stable DC current source delivers clean, repeatable and interference-free measurements under all operating conditions.

This technology provides metrology-grade static resistance measurements and produces exceptionally clean DRM curves that are easier to interpret and far more representative of the true behaviour of breaker contacts. The system also avoids synchronization constraints and eliminates thermal stress on contacts, ensuring highly reliable measurements across all breaker types.

Unlike conventional integrated systems that combine high-current injection and low-voltage measurement in the same module, the KIT MOSD completely separates these circuits. This deliberate electrical isolation eliminates crosstalk, minimizes noise and ensures that every micro-variation in resistance is captured with uncompromising accuracy. By removing the distortion, electromagnetic interference and timing errors inherent to impulse-based systems, engineers are able to observe the true behaviour of breaker contacts during motion with exceptional clarity and consistency.

Designed for real-world conditions, the KIT MOSD features a modular architecture that enables precise alignment with breaker contacts while remaining adaptable to HV, MV and LV circuit breakers. Built for harsh field environments, the system combines rugged construction with a workflow optimized for technicians and engineers, ensuring easy installation and dependable operation. By prioritising electrical separation, measurement fidelity and ultra-stable current injection, the KIT MOSD delivers DRM signatures that are cleaner, more consistent and far more reliable than those produced by conventional integrated or impulse-based solutions.