SMC PRIME-600 Micro-Ohmmeter

Overview

The SMC PRIME-600 is a high-current micro-ohmmeter designed for low-resistance measurements in electrical installations, with 4-wire measurement capability. It uniquely integrates both contact resistance and dynamic resistance measurement (DRM) as a standalone unit. The dynamic resistance test, essential for analyzing wear of arcing contacts in SF6 and vacuum breakers, is a distinctive feature that eliminates the need for multiple devices. The PRIME-600 plots DRM time/resistance curves that reveal contact anomalies and wear, providing diagnostic information on breaker internal conditions without opening the chamber.

Key Features

• High-current injection up to 600A DC (6V DC at 600A) with pure DC generation, eliminating ripple-induced distortions
• Dynamic Resistance Measurement (DRM) for circuit breaker contact analysis
• 4-wire measurement method for accurate low-resistance readings (micro-ohms to milliohms range)
• Touch-screen graphical display with pre-defined test modes
• Automatic connection verification at test start; automatic de-magnetization after measurements
• Built-in thermal printer for on-site report generation
• Removable USB storage and PC connectivity via PrimeSync software for detailed reporting
• Optional temperature sensor for results normalization
• Optional dual ground clamp accessory for dual-ground test method
• Rugged IP67 protective case for harsh field environments

Applications

• Circuit breaker contact resistance measurement per ANSI C37.09-1979, IEC 1208, and IEC 694 standards
• Quick evaluation of arc contact condition in SF6 and vacuum insulated circuit breakers
• Connection quality assessment in cable attachments, busbars, and conductive joints
• Winding resistance measurement in transformers
• Continuity testing in switches, earth connections, welding points, and fuses