The TVOC-2 Arc Guard System detects faults in low- and medium-voltage switchgear within 1 ms and disconnects the power provided to the arc within 30–50 ms, preventing serious injury to personnel and reducing damage to expensive equipment. Without the system, an arc flash will typically trip a circuit breaker in approximately one second, enough time for the arc to destroy the switchgear and kill or seriously injure a person. TVOC-2 carries a functional safety rating of SIL-2 as certified by TÜV Rheinland. The TVOC-2 features enhancements, including pre-calibrated optical sensors and fiber-optic point sensors, wide-ranging input voltage ratings (100 to 240 V a.c. and 100 to 250 V d.c.) and selective tripping of only the affected circuit breaker, not all breakers within a system. Applications suitable for Arc Guard include substations; critical power facilities, such as hospitals and data centers; oil rigs; chemical plants; steel mills; and wind or solar power facilities. — ABB, Cary, N.C.