Chapter 7 Optional Accessories MS300 VFDB4110 / 4160 / 4185 Braking Modules Instruction Sheet http://www.deltaww.com/filecenter/Products/download/06/060101/Option/DELTA_IA-MDS_VFDB41 10-4160-4185_I_EN_20101011.pdf VFDB6055 / 6110 / 6160 / 6200 Braking Modules Instruction Sheet http://www.deltaww.com/filecenter/Products/download/06/060101/Option/DELTA_IA-MDS_VFDB60 55-6110-6160-6200_I_TSE_20121030.pdf 5. The selection tables are for normal usage. If the AC motor drive requires frequent braking, increase the Watts by two to three times. 6. Thermal Overload Relay (TOR): Thermal overload relay selection is based on its overload capacity.
A standard braking capacity of the MS300 is 10% ED (Tripping time=10 s). As shown in the figure below, a 460V, 1kw MS300 required the thermal relay to take 260% overload capacity for 10 seconds (hot starting) and the braking current is 24A. In this case, select a thermal overload relay rated at 10 A (10 * 260% = 26 A > 24 A). The property of each thermal relay may vary among different manufacturers. Carefully read the specification before using it. Figure 7-1-3 7-5