© Siemens AG 2010 BETA Low-Voltage Circuit Protection Introduction 19 19/3 Siemens LV 1 · 2010 RCCBs, type A SIQUENCE, universal current-sensitive RCCBs, type B and type B+ RC units, type A RCBOs, type A 5SM3 5SM3, 5SU1 5SM2 5SU1 Residual current protective devices Types of current Type A Type B Type A Type A Rated current A 16 ... 125 16 ... 125 0.3 ... 100 6 ... 125 Rated residual current mA 10 ... 1000 30 ... 500 10 ... 1000 10 ... 300 SITOR, LV HRC design SITOR, cylindrical fuse design SILIZED, NEOZED and DIAZED design 3NC, 3NE 3NC 5SE1, 5SD SITOR Semiconductor Fuses Operational classes aR, gR, gS aR gR Rated voltage V AC V DC 500 ...
2500 700 600/660/690 400/700 400/500 250/500 Rated current range A 16 ... 1600 1 ... 100 10 ...
100 Distribution board components Built-in components Mounting components 8GK, 8JH, 8JK, 8US 5SF, 5SG, 5SH 5SH, 8US SR60 busbar systems Application Busbars, busbar sup- ports and covers NEOZED/DIAZED bus- mounting bases, NEOZED bus-mounting switch disconnectors Bases, blanking cov- ers, edges Socket outlets 5TE6 8 Socket outlets Application Power supply for maintenance of distribution boards E-counters Digital measuring Analog measuring devices Time and devices pulse counters 7KT1 53 7KT1 11, 7KT1 12 7KT1 0 7KT5 8 7KT1 14 E-counters Digital measuring devices Analog measuring devices Time and pulse counters Time counters for front mounting 7KT1 53 7KT1 14 7KT1 11, 7KT1 12 7KT1 0 7KT5 8 7KT5 5, 7KT5 6 Single-phase measuring devices Application Measuring of kWh in single-phase networks Measuring of voltages and currents with large three-digit LED displays Measuring of voltages and currents for monitoring input and output currents For monitoring operat- ing hours and starting operations for plan- ning preventative main- tenance tasks and preventing sudden shutdowns For monitoring operat- ing hours and starting operations for plan- ning preventative main- tenance tasks and preventing sudden shutdowns