Arc-flash prediction and detection in MV/LV
It is based on simultaneous detection of light and overcurrent and provides an extremely fast and secure arc flash detection and
Arc-flash and arc-flash studies are also clarified. This White Paper also highlights a safety concern when HV/MV switchgear fails catastrophically, particularly oil-filled switchgear assembly. Within IEC Standards, HV switchgear are used on systems above 1 kV up to 52 kV. In North America MV is any voltage between 600 V and 69 kV.
Sensors available in the market today detect light from an arc-flash inside switchgear very quickly, typically less < 100 ms, and trip the incoming supplies to the switchgear. Some concern has been expressed whether the sensors fail safe. North American Arc resistant testing standards are defined by ANSI/IEEE C37.20.7.
ABB's arc flash mitigation solutions keep your business running, improving uptime by limiting the energy of arc faults, therefore limiting the damage they cause to switchgear and assets and the repair time required. Maximum peace of mind.
The principle of passive arc flash protection is based on the mechanical design of low- and medium-voltage switchgear. Robust design reduces the risk that a person, standing in front of switchgear with closed and latched doors, will be injured in the event of an arcing current event inside the equipment.
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