A circuit breaker or protective relay spends almost its whole life doing nothing. Then, in a fault, it has milliseconds to trip and clear the circuit. If it is mis-set, mechanically sluggish or has degraded contacts, it fails exactly when everything depends on it. You cannot wait for a real fault to find out, so you inject a controlled one on a bench and confirm the device operates to its characteristic. That is what the Neometrix Circuit-Breaker & Relay Test Bench is for.<\/p>\n
– Breakers (primary injection):<\/strong> a large current is driven through the breaker to trace its time-current tripping curve, covering the thermal and magnetic trip. The specialist relay test set and the precision micro-ohmmeter are bought-in instruments. Neometrix engineers what makes them a safe, repeatable bench: the high-current injection source (transformer, variac and heavy busbar), the fixturing for the device, the control console and routing, measurement integration, automation and reporting, and the safety interlocks.<\/p>\n
\n– Relays (secondary injection):<\/strong> a test set applies precise current and voltage to verify pickup, dropout and operating time against the setting. A numerical relay is verified by three-phase injection across its protection functions.
\n– The mechanism itself:<\/strong> opening and closing time, pole discrepancy, contact resistance (a micro-ohm measurement that reveals eroded or loose contacts), insulation resistance, and the trip and close coils and spring-charge motor.<\/p>\nThe Bench Is the Engineering<\/h2>\n
Four Variants<\/h2>\n