The SMC Prime 600 is a high-end, digital micro-ohmmeter explicitly engineered for high-current substation testing. It stands out in the power testing market as a standalone instrument that records both static contact resistance and Dynamic Resistance Measurement (DRM) to analyze arcing contact wear in vacuum and SF6 circuit breakers.
Dynamic Resistance Measurement (DRM): Plots a high-resolution time vs. resistance curve sampling every 30 micro-seconds during a breaker open/close stroke. This allows diagnostics of internal arcing contacts without physically breaking open the gas chambers.
Dual Ground Operation Safety: Features a derived current input circuit that measures and suppresses ground-loop currents. Technicians can safely test assets with both sides grounded, eliminating the need to drop safety grounds during an outage window.
Automatic De-Magnetization: For user and equipment safety, the instrument automatically de-magnetizes the inductive test load immediately following the completion of every measurement loop.
Field-Ready Interfaces: Outfitted with a touch-sensitive graphical display, a built-in thermal printer for instant field receipts, and automatic temperature normalization logic (with an optional probe).
| Attribute | Specification |
| Manufacturer | EuroSMC (SMC) |
| Product Model | PRIME 600 |
| DC Current Injection Ranges | 5 to 600 A DC (Variable Selection / 1 A resolution) |
| Duty Cycle @ 240 Vac | • 5–600 Adc: 2 seconds max • 5–300 Adc: 2 minutes max • 5–150 Adc: Continuous duty |
| Maximum Output Voltage | 6 Vdc at 600 A |
| Static Resistance Ranges | 1 m$\Omega$ up to 1000 m$\Omega$ |
| Measurement Resolution | Down to 0.1 $\mu\Omega$ (on the 1 m$\Omega$ scale) |
| System Measurement Accuracy | $\pm$0.2% of Reading $\pm$0.1 $\mu\Omega$ |
| Environmental Case Rating | ABS Heavy Duty Casing, IP67 rated (closed) |
| Unit Weight & Dimensions | 13.5 kg (approx. 30 lbs) / 47 x 35.7 x 17.6 cm |
| Power Supply Link | Universal 115V or 230V AC (Automatic Detection), 50-60 Hz |
