For Operation in the Control Cabinet © Siemens AG 2009 3RW Soft Starters 3RW40 for standard applications 6 1) Measurement at 60 °C according to UL/CSA not required. 2) Current limit on soft starter set to 300 % I M . 3) For intermittent duty S4 with ON period = 30 %, T u = 40 °C, stand-alone installation vertical. The quoted switching frequencies do not apply for automatic mode. 4) Maximum adjustable rated motor current I M , dependent on CLASS setting. 6/21 Siemens LV 1 T · 2009 Type 3RW40 2.-. .B.4, 3RW40 3.-. .B.4, 3RW40 4.-. .B.4 3RW40 2.-. .B.5, 3RW40 3.-. .B.5, 3RW40 4.-.
.B.5 3RW40 5.-.BB.4, 3RW40 7.-.BB.4 3RW40 5.-.BB.5, 3RW40 7.-.BB.5 Power electronics Rated operational voltage V AC Tolerance % 200 ... 480 400 ... 600 200 ... 460 400 ... 600 -15/+10 -15/+10 -15/+10 -15/+10 Maximum blocking voltage (thyristor) V AC 1600 1400 1800 Rated frequency Hz Tolerance % 50/60 ±10 Uninterrupted duty at 40 °C (% of Ie) % 115 Minimum load (% of minimum selectable rated motor current IM) % 20 (at least 2 A) Maximum cable length between soft starter and motor m 300 Permissible installation height m 5000 (derating from 1000, see characteristic curves); higher on request Permissible mounting position • With auxiliary fan (for 3RW40 2. ...
3RW40 4.) • Without auxiliary fan (for 3RW40 2. ... 3RW40 4.) 10° 10° 10° 10° NSB0_01897 -- (fan integrated in the soft starter) Permissible ambient temperature Operation °C Storage °C -25 ... +60; (derating from +40) -40 ... +80 Degree of protection IP20 for 3RW40 2.; IP00 for 3RW40 3. and 3RW40 4. IP00 Type 3RW40 24 3RW40 26 3RW40 27 3RW40 28 Power electronics Load rating with rated operational current Ie • Acc.
to IEC and UL/CSA1), for individual mounting, AC-53a - At 40 °C A - At 50 °C A - At 60 °C A 12.5 25.3 32.2 38 11 23 29 34 10 21 26 31 Smallest adjustable rated motor current I M For the motor overload protection A 5 10 17 23 Power loss • In operation after completed starting with uninterrupted rated W operational current (40 °C) approx.
• During starting with current limit set to W 300 % I M (40°C) 2 8 13 19 17 47 55 64 Permissible rated motor current and starts per hour • For normal starting (Class 10) - Rated motor current I M2), starting time 3 s A - Starts per hour3) 1/h - Rated motor current I M2)4), starting time 4 s A - Starts per hour3) 1/h • For heavy starting (Class 15) - Rated motor current I M2), starting time 4.5 s A - Starts per hour3) 1/h - Rated motor current I M2)4), starting time 6 s A - Starts per hour3) 1/h • For heavy starting (Class 20) - Rated motor current I M2), starting time 6 s A - Starts per hour3) 1/h - Rated motor current I M2)4), starting time 8 s A - Starts per hour3) 1/h 12.5 25 32 38 50 23 23 19 12.5 25 32 38 36 15 16 12 11 23 30 34 49 21 18 18 11 23 30 34 36 14 13 13 10 21 27 31 47 21 20 18 10 21 27 31 34 15 14 13