Overload Relays 3RU1 Thermal Overload Relays 3RU11 for standard applications Short-circuit protection with fuses/motor starter protectors for motor feeders With short-circuit currents up to 100 kA at rated operational voltages up to AC 50/60 Hz 690 V Permissible short-circuit protection fuse for motor starters comprising overload relay and contactor, type of coordination 2 1) For type of coordination "1" 1) see short-circuit protection of the contactors without overload relay under "Controls - Contactors and Contactor Assemblies". 1) Assignment and short-circuit protective devices according to IEC 60947-4-1:
The contactor or starter must not endanger persons or the installation in the event of a short-circuit. Type of coordination "1": The contactor or the starter may be non-operati- onal after every short-circuit release. Type of coordination "2": The contactor or the starter must be operational after a short-circuit release (without replacement of parts). Welding of the contacts is permissible however.
14 Siemens · 2009 Overload relay Setting range A 15 kW r 3RT10 34 18.5 kW r 3RT10 35 22 kW r 3RT10 36 UL-listed fuses RK5 Motor starter protector for starter combinations at I q = 50 kA/400 V AC I e max = 32 A (at AC 50 Hz 400 V) I e max = 40 A (at AC 50 Hz 400 V) I e max = 50 A (at AC 50 Hz 400 V) gL/gG aM BS 88 gL/gG aM BS 88 gL/gG aM BS 88 A Size S2 5.5 ... 8 25 10 25 25 10 25 25 10 25 30 -- 7 ... 10 32 16 32 32 16 32 32 16 32 40 -- 9 ... 12.5 35 16 35 35 16 35 35 16 35 50 -- 11 ... 16 40 20 40 40 20 40 40 20 40 60 -- 14 ... 20 50 25 50 50 25 50 50 25 50 80 -- 18 ... 25 63 32 63 63 32 63 63 32 63 100 3RV13 31-4DC10 22 ... 32 63 35 63 63 35 63 80 35 80 125 3RV13 31-4EC10 28 ...
40 63 50 63 63 50 63 80 50 80 150 3RV13 31-4FC10 36 ... 45 -- -- -- 63 50 80 80 50 80 175 3RV13 31-4GC10 40 ... 50 -- -- -- -- -- -- 80 50 80 200 3RV13 31-4HC10 Overload relay Setting range A 30 kW r 3RT10 44 37 kW r 3RT10 45 45 kW r 3RT10 46 UL-listed fuses RK5 Motor starter protector for starter combinations at I q = 50 kA/400 V AC I e max = 65 A (at AC 50 Hz 400 V) I e max = 80 A (at AC 50 Hz 400 V) I e max = 95 A (at AC 50 Hz 400 V) gL/gG aM BS 88 gL/gG aM BS 88 gL/gG aM BS 88 A Size S3 18 ... 25 63 32 63 63 32 63 63 32 63 100 -- 22 ... 32 80 35 80 80 35 80 80 35 80 125 -- 28 ... 40 80 50 80 80 50 80 80 50 80 150 -- 36 ... 50 125 50 125 125 50 125 125 50 125 200 -- 45 ...
63 125 63 125 160 63 160 160 63 160 250 3RV13 41-4JC10 57 ... 75 -- -- -- 160 80 160 160 80 160 300 3RV13 41-4KC10 70 ... 90 -- -- -- -- -- -- 160 100 160 350 3RV13 41-4LC10 80 ... 100 -- -- -- -- -- -- 160 100 160 350 3RV13 41-4MC10