The CBT(RCCB) is in conformity with the standards of IEC 1008,GB16916,VDE0664 and Bs4293the RCCB can cut off the fault circuit immediately on the occasion of shock hazard or earth eakage.The RCCB is mainly suitable for use in variety of plants and enterprises ,building constructon commerce,guesthouses and families.It can be used in circuits up to single phase 230V,three phase 400V 50 to 60Hz.RCCB is not suitable for use on DC pulse system.