Arc Guard System™ TVOC-2

The TVOC-2 Arc Guard System is an arc protection relay that mitigates arc faults and helps to protect people and equipment. The Arc monitor is the main unit of the Arc Guard System which detects the light of an arc and through the fast IGBT contacts sends an electrical signal within 1 ms to a nearby

breaker that breaks the power and extinguishes the arc. The Arc monitor has 10 detector inputs and can trip up to three breakers with zone selectivity if needed. Up to 2 extension units can extend the number of light detectors to 30 and the unit includes an HMI that can be placed on the outside of the door. Detectors are sold in a wide range of lengths to fit a full switchgear design. Supply voltage 24… 48 V DC. Accessories include current sensing unit, optical cables, cable straps etc.

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.

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Main benefits

  • Increased safety to personnel and equipment
  • Minimizes downtime after an arc accident
  • No calibration needed, ensures reliable function and quick installation
  • Can easily be expanded with up to 30 sensors to increase cabinet coverage from a single TVOC-2
  • Rogowski technology current sensors for fast and reliable installation
  • SIL-2 certified according to IEC 61508 and IEC 62061 ensures extremely reliable function
  • Modbus RTU communication protocol
  • Integrated in ABB ability TM EDCS
  • Available in EkipConnect 3 configuration tool
  • Together with CSU-2 both light and current are used for tripping in less than 2 ms
  • The CSU-2 informs the user of malfunctional current sensors

 

Specification

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: 1 W

Rated Operational Voltage: 24 … 48 V DC

Terminal Type: Screw Terminals

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