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-ope- rational after every short-circuit release. Type of coordination "2": The contactor or the starter must be operatio- nal after a short-circuit release (without replacement of parts). Welding of the contacts is permissible however. 2) At max. 415 V.
13 Siemens · 2009 Overload relay Setting range A 3 kW r 3RT10 15 4 kW r 3RT10 16 5.5 kW r 3RT10 17 UL-listed fuses RK5 Motor starter protector for starter combinations at I q = 50 kA/400 V AC I e max = 7 A (at AC 50 Hz 400 V) I e max = 9 A (at AC 50 Hz 400 V) I e max = 12 A (at AC 50 Hz 400 V) gL/gG aM BS 88 gL/gG aM BS 88 gL/gG aM BS 88 A Size S00 0.11 ... 0.16 0.5 -- -- 0.5 -- – 0.5 – – 1 -- 0.14 ... 0.2 1 -- -- 1 -- – 1 – – 1 3RV13 21-0BC10 0.18 ... 0.25 1 -- -- 1 -- – 1 – – 1 3RV13 21-0CC10 0.22 ... 0.32 1.6 -- 2 1.6 -- 2 1.6 – 2 1 3RV13 21-0DC10 0.28 ... 0.4 2 -- 2 2 -- 2 2 – 2 1.6 3RV13 21-0EC10 0.35 ... 0.5 2 -- 2 2 -- 2 2 – 2 2 3RV13 21-0FC10 0.45 ...
0.63 2 -- 4 2 -- 4 2 – 4 2.5 3RV13 21-0GC10 0.55 ... 0.8 4 -- 4 4 -- 4 4 – 4 3 3RV13 21-0HC10 0.7 ... 1 4 -- 6 4 -- 6 4 – 6 4 3RV13 21-0JC10 0.9 ... 1.25 4 -- 6 4 -- 6 4 – 6 5 3RV13 21-0KC10 1.1 ... 1.6 6 -- 10 6 -- 10 6 – 10 6 3RV13 21-1AC10 1.4 ... 2 6 -- 10 6 -- 10 6 – 10 8 3RV13 21-1BC10 1.8 ... 2.5 10 -- 10 10 -- 10 10 – 10 10 -- 2.2 ... 3.2 10 -- 16 10 -- 16 10 – 16 12 -- 2.8 ... 4 16 -- 16 16 -- 16 16 – 16 16 -- 3.5 ... 5 20 6 20 20 6 20 20 6 20 20 -- 4.5 ... 6.3 20 6 20 20 6 20 20 6 20 25 -- 5.5 ... 8 20 10 20 20 10 20 20 10 20 30 -- 7 ... 10 -- -- -- 20 16 20 20 16 20 40 -- 9 ...
12 -- -- -- -- -- -- 20 16 25 45 -- Overload relay Setting range A 5.5 kW r 3RT10 24 7.5 kW r 3RT10 25 11 kW r 3RT10 26 UL-listed fuses RK5 Motor starter protector for starter combinations at I q = 50 kA/400 V AC I e max = 12 A (at AC 50 Hz 400 V) I e max = 17 A (at AC 50 Hz 400 V) I e max = 25 A (at AC 50 Hz 400 V ) gL/gG aM BS 88 gL/gG aM BS 88 gL/gG aM BS 88 A Size S0 1.8 ... 2.5 10 – 10 10 – 10 10 – 10 10 3RV13 21-1CC10 2.2 ... 3.2 10 – 16 10 – 16 10 – 16 12 3RV13 21-1DC10 2.8 ... 4 16 – 16 16 – 16 16 – 16 16 3RV13 21-1EC10 3.5 ... 5 20 6 20 20 6 20 20 6 20 20 3RV13 21-1FC10 4.5 ... 6.3 20 6 25 20 6 25 20 6 25 25 3RV13 21-1GC10 5.5 ...
8 25 10 25/322) 25 10 25/322) 25 10 32 30 3RV13 21-1HC10 7 ... 10 25 16 25/322) 25 16 25/322) 32 16 35 40 3RV13 21-1JC10 9 ... 12.5 25 20 25/322) 25 20 25/322) 35 20 35 45 3RV13 21-1KC10 11 ... 16 25 20 25/322) 25 20 25/322) 35 20 35 60 3RV13 21-4AC10 14 ... 20 -- -- -- 25 20 25/322) 35 20 35 80 3RV13 21-4BC10 17 ... 22 -- -- -- -- -- -- 35 20 35 80 3RV13 21-4CC10 20 ... 25 -- -- -- -- -- -- 35 20 35 100 --