How ABB Arc Guard System TVOC-2 Works
The heart of the system, the Arc Monitor, rapidly detects the intense light emitted during an arc flash. Within milliseconds, it triggers a high-speed electrical signal to a nearby circuit breaker, initiating a rapid shutdown of the power supply. This swift response effectively extinguishes the arc, preventing further damage and potential injuries.
Feature of ABB TVOC-2 Arc Guard System
- Advanced Detection: The Arc Monitor, with its 10 detector inputs, can monitor multiple areas within a switchgear.
- Flexible Configuration: Up to two extension units can be added, expanding the system’s coverage to 30 detectors.
- Precise Control: Zone selectivity allows for targeted tripping of specific breakers, minimizing unnecessary outages.
- User-Friendly Interface: The integrated HMI provides intuitive control and monitoring capabilities.
- Robust Design: Built to withstand harsh industrial environments, ensuring reliable performance.
- Enhanced Safety: Optional current sensing units (CSU-2) can be added to provide additional protection against false trips caused by external light sources.
- DIN-rail or screw mounting
- Detachable key-pad with full-text display (can even handle two HMIs)
- Rated supply voltage: 100-240 V AC and 100-250 V DC. Also 24-48 VDC is available
Main benefits of ABB TVOC-2 Arc Guard System
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Increased safety to personnel and equipment
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Minimizes downtime after an arc accident
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No calibration needed, ensures reliable function and quick installation
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Can easily be expanded with up to 30 sensors to increase cabinet coverage from a single TVOC-2
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Rogowski technology current sensors for fast and reliable installation
Specification of ABB Arc Guard System TVOC-2
| Ambient Air Temperature | Operation -25 … +55 °C, Storage -25 … +55 °C |
| Mounting Type | Wall mounted or DIN |
| Number of Auxiliary Contacts CO (SPDT) | 3 |
| Number of Auxiliary Contacts NC | 0 |
| Number of Auxiliary Contacts NO | 3 |
| Power Loss | 1W |
| Rated Operational Voltage | 24 … 48 V DC |
| Terminal Type | Screw Terminals |
| Optical inputs and output | Optical detectors 10 inputs on Arc monitor,10 inputs on Extension unit X2 (optional), 10 inputs on Extension unit X3 (optional) Current signal from CSU: 2 inputs X1.21, X1.22 (optical) Forward current signal to another Arc monitor: 1 output X1.23 (optical) |
| From light detection to trip (contacts K4, K5, K6) | Approx. 1 ms (depends on light intensity) |
| From light detection to indication signal (relay K2, K3) | < 10 ms |
| Current condition from input to output | < 0.4 ms |
Applications of ABB TVOC-2 Arc Guard System
The typical applications of the ABB TVOC-2 Arc guard system include all low-voltage and medium-voltage switchgear. It is widely used in different industries including the steel industry, paper machines, marine, ships, etc.
