Custom design & supply of arc flash rated electrical
Custom design & fabrication of arc flash rated electrical switchgear in China; technical support from your initial design of your
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.
Canada use CSA C22.2 No. 0.22-11 “Evaluation methods for arc resistance rating of enclosed electrical equipment” to evaluate internal arc rated switchgear. Internal arc type testing is very important to reduce the risk of exploding switchgear.
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.
Within IEC Standards, internal arc rated switchgear manufactured prior to 2003 may only have been tested for internal arc in the main MV switching compartment, which was the optional requirements within IEC 60298 (the standard that was superseded by IEC 62271-200).
PDF includes complete article with source references for printing and offline reading.
Download detailed specifications for our commercial energy storage cabinets, PCS, BMS and EMS systems.
Energy Park Precinct, Unit 15
Johannesburg 2001, South Africa
+27 10 446 7800
Monday - Friday: 7:30 AM - 5:30 PM SAST