Siemens 2020 Residual Current Protective Devices / Arc Fault Detection Devices (AFDDs) More safety for humans, plants and assets The number of electrical consumers in residential homes and commercial buildings has increased dramatically in recent decades. Modern appliances often have quite different characteristics in terms of current consumption than earlier equipment due, for example, to the use of frequency converters in washing machines, or switched-mode power supply units in TVs, PCs or LED lights. There are also decentralized power generators like photovoltaic systems or charging devices for electric vehicles. All of this requires new protection strategies for electrical installations. This also includes appropriate residual current protection devices or residual current circuit breakers that will cut the current immediately and safely in the event of a fault. Siemens 2020 R esidual Current Protective Devices / Arc Fault Detection Devices (AFDDs) Residual Current Pro ctive Devices / Arc Fault Detection Devices (AFDDs) All the information you need 4/2 System overview 4/4 4 Introduction 4/5 Quick selection guide 4/6 RCCBs 4/6 RC units 4/8 RCBOs 4/10 Arc fault detection devices (AFDD) 4/12 Basic units 4/14 5SV RCCBs, type A, F and AC 4/14 5SV3 RCCBs, type B and B+ (SIQUENCE) 4/26 5SM3 RCCBs, type A and AC 4/30 5SM2 RC units, type A, F and AC 4/32 5SU1 RCBOs, type A, F, AC, B and B+ 4/38 5SV1 RCBOs (1 MW), type A, F and AC 4/48 5SM6 arc fault detection devices 4/50 5SV6 arc fault detection devices (1 MW) 4/51 Accessories 4/52 Overview of modular system 4/52 Electrical accessories 4/54 Mechanical accessories 4/62 RCCB protective socket outlets 4/63 Standard busbars 4/64 Compact busbars 4/68 Siemens LV 10 10/2020 4/1