UKJ series screw frame clamp terminal blocks fulfill all requirements of IEC60947-7-1、IEC60947-7-2、GB14048.7 GB/T14048.8 and JB/T9659.1 etc. Standards. This series terminal blocks can be used in the circuit that AC50Hz(60Hz), rated voltage is 500V-1000V, to connect round copper conductor which unprocessed or with terminals and which rated cross section is 0.14mm2~240mm2. UKJ series terminal blocks have CE Approval in 2001, CCS (China Classification Society) Approval on January 2002, and CQC (Quality System Certificate), leading models products have VDE and UL Approval in 2005..