ARC GUARD SYSTEM™ TVOC-2
The Arc Guard System™ is a field-proven optical arc flash mitigation device with the fastest reaction time in the industry, confirming ABB’s position as a leader in electrical safety.
SAFETY FOR YOUR MOST VALUABLE RESOURCES
The arc flash is one of the most dangerous incidents in electrical installations that could cause severe harm to people and equipment involved. When an arc flash occur, time until arc interruption is one of the most critical factors since it is directly proportional to the amount of energy released. The arc flash incident energy will in turn determine how much damage an arc flash will cause.
The Arc Guard detects the light from an occurring arc flash and sends the signal to the breaker within 1ms. Together with ABB’s Emax 2 circuit breaker the total arc fault clearing time is 50ms. If the switchgear is likely to be exposed to strong light that could cause nuisance tripping of the TVOC-2, current can be added as a second condition. The current sensing unit CSU-2 is an accessory to the TVOC-2 which will identify the current increase associated with an arc flash.
MAIN FEATURES
SIL-2 Certified
<p><p>SIL-2 certified according to IEC 61508 and IEC 62061 ensures extremely reliable function</p> </p>Modbus RTU Protocol
<p><p>Modbus RTU communication protocol</p> </p>Integrated in ABB Cloud
<p><p>Integrated in ABB Cloud</p> </p>Tripping in Less Than 2ms
<p><p><p>Together with CSU-2 both light and current are used for tripping in less than 2ms</p> </p> </p>Sensor Supervision
<p><p>The TVOC-2 informs the user of malfunctional sensors using supervised sensors</p> </p> <p> </p>KEY BENEFITS
Enhanced personnel & equipment safety, Minimized downtime after arc faults, No calibration required, Scalable up to 30 sensors, Fast, reliable Rogowski sensors
FREQUENTLY ASKED QUESTIONS
The TVOC-2 is designed for use in both low-voltage and medium-voltage switchgear. Its modular concept allows it to fit all types and sizes of LV and MV assemblies, including new installations and retrofits.
The CSU-2 adds overcurrent sensing to the arc detection system. By conditioning tripping on both light detection and an overcurrent signal, it eliminates the risk of nuisance tripping caused by camera flashes, welding arcs, or sunlight intrusion, while maintaining a total trip time of under 2 ms.
No. All optical sensors are factory calibrated and require no on-site adjustment. This simplifies installation and reduces commissioning time.
Yes. The TVOC-2 is certified to Safety Integrity Level 2 (SIL 2) per IEC 61508 and IEC 62061, and meets Performance Level d per EN ISO 13849-1. It also holds approvals from DNV, ABS, Bureau Veritas, and TÜV.