As a kind of indoor metal-enclosed device, this type of distributing cubicles is competently applied in industrial and civil buildings for power distribution and lighting distribution in 50Hz, up to 500V, 3-phase and 4-wire electric power grids.  With overload, short circuit and earth fault protections, this product complies with GB7251.1, IEC60439–1 and other standards.  The degree of protection for enclosure is IP20 – IP54.