4-2 Function Mode 4 Functions * To switch to the 2nd/3rd control, allocate 08 (SET)/17 (SET3) to the desired multi-function input and then turn it on. *1. Set a percentage relative to the electronic thermal multiplication value. When the value reaches 100%, an overload trip (E05) occurs. „ Electronic Thermal Level (Motor Protection Level) (Example) 3G3RX-A2150 Rated current: 64 A Setting range: 12.8 A (20%) to 64.0 A (100%) • The graph on the right shows the time limit characteristics with the electronic thermal level (b012) set to 64 A.
Trip time (s) 60 3.0 0 69.8 (109%) 96 (150%) 128 (200%) Motor current (A) (Ratio to the rated current of the Inverter) „ Electronic Thermal Characteristics •The frequency characteristics are integrated with the above b012/b212/b312 set values. •A general-purpose motor requires reduced load (current) because the lower the output frequency is, the lower the cooling capability of its self-cooling fan. •The reduced torque characteristics are designed to fit the heat radiation of a general-purpose motor. 4-47 Parameter No. Function name Data Default setting Unit b015 Free setting, electronic thermal frequency 1 0. to 400. 0.
Hz b017 Free setting, electronic thermal frequency 2 b019 Free setting, electronic thermal frequency 3 b016 Free setting, electronic thermal current 1 0.0 to Rated current 0.0 A b018 Free setting, electronic thermal current 2 b020 Free setting, electronic thermal current 3 C061 Thermal warning level 0. to 100. *1 80 % Related functions C021 to C025, C026