3UG4 / 3RR2 monitoring relays
Manual, 05/2016, NEB927043002000/RS-AC/004
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1 Introduction................................................................................................................................. 11
1.1 Service&Support ............................................................................................................... 11
1.2 Technical data in Siemens Industry Online Support ........................................................... 14
1.3 DataMatrix code ................................................................................................................ 15
2 Safety information ....................................................................................................................... 17
2.1 Standards.......................................................................................................................... 17
2.2 Product-specific safety information .................................................................................... 18
2.3 Approvals, test certificates, characteristics ......................................................................... 18
3 System overview ......................................................................................................................... 19
3.1 Product description ............................................................................................................ 19
3.2 Application planning .......................................................................................................... 20
3.3 Connection methods.......................................................................................................... 21
3.3.1 Screw-type connection ...................................................................................................... 21
3.3.2 Spring-loaded connection .................................................................................................. 23
3.3.3 Device replacement by means of removable terminals ....................................................... 28
3.4 Mounting / removal ............................................................................................................ 29
3.4.1 Mounting 3RR2 current monitoring relay ............................................................................ 29
3.4.2 Mounting the 3UG4 monitoring relay .................................................................................. 34
3.4.3 Installing the 3UG458. monitoring relay. ............................................................................ 35
3.5 Overview of the functions .................................................................................................. 36
3.5.1 3RR2 current monitoring relays ......................................................................................... 36
3.5.2 3UG45 / 3UG46 monitoring relays ..................................................................................... 37
3.6 Menu-based operation ....................................................................................................... 39
4 3RR2 current monitoring relays ..................................................................................................... 45
4.1 Product description ............................................................................................................ 45
4.2 Application areas ............................................................................................................... 47
4.3 Performance features of current monitoring relays ............................................................. 48
4.3.1 General data ..................................................................................................................... 49
4.3.2 Properties.......................................................................................................................... 50
4.3.3 Configuration of load feeders ............................................................................................. 51
4.3.4 Combinations with 3RT20 contactor .................................................................................. 52
4.4 3RR21 current monitoring relays ....................................................................................... 53
4.4.1 Operator controls and connection terminals ....................................................................... 53
4.4.2 Function ............................................................................................................................ 54
4.4.3 Operation .......................................................................................................................... 56
4.4.4 Diagnostics ....................................................................................................................... 58
4.4.5 Circuit diagrams ................................................................................................................ 59
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