The RES-24 module is designed for the measurement of insertion resistance of auxiliary (resistive) contacts during circuit breaker open and close operations performed with the CBA-32P system.

During standard breaker timing tests executed with the CBA-32P and analyzed in CBA Win© software, auxiliary contact states are represented as logical signals: open (0), closed (1), and resistive transition (0.5). This representation provides a clear indication of contact status during switching, but it does not provide the actual electrical resistance value in ohms during the transition or steady states.

The purpose of the RES-24 module is to provide this missing electrical information by measuring the real insertion resistance of auxiliary contacts during opening and closing operations. Instead of only indicating logical states, the system delivers quantitative resistance values in real time during switching events.

These measurements are performed during the dynamic operation of the circuit breaker and are fully synchronized with the timing acquisition of the CBA-32P system. This ensures that each resistance value is directly correlated with the exact mechanical and electrical switching moment.

The measured resistance values are then integrated into the CBA Win© software environment, where they are displayed alongside timing curves and auxiliary contact state traces in both graphical and tabular reports. This allows operators to analyze switching behavior and contact condition within a single unified dataset.

KEY BENEFITS

• Provides real-time measurement of auxiliary contact insertion resistance during breaker open and close operations
• Completes standard CBA Win© logic representation (0 / 1 / 0.5) with actual resistance values in ohms
• Enables quantitative evaluation of auxiliary contact electrical condition beyond state indication
• Fully synchronized with CBA-32P timing acquisition for precise correlation with switching events
• Detects abnormal contact resistance, degradation, and irregular switching behavior
• Integrated into CBA Win© graphical and tabular reporting for unified analysis with timing data