Chapter 7 Optional Accessories MS300 1. Select the resistance value, power and brake usage (ED %) according to Delta rules. Definition for Brake Usage ED% Figure 7-1-1 conjunction with the magnetic contactor (MC) before the drive for additional protection. The thermal For safety, install a thermal overload relay (O.L) between the brake unit and the brake resistor in overload relay protects the brake resistor from damage due to frequent or continuous braking. Under such circumstances, turn off the power to prevent damage to the brake resistor, brake unit and drive. NOTE: Never use it to disconnect the brake resistor. Figure 7-1-2 2.
Any damage to the drive or other equipment caused by using brake resistors and brake modules that are not provided by Delta voids the warranty. 3. Consider environmental safety factors when installing the brake resistors. If you use the minimum 4. When using more than two brake units, the equivalent resistor value of the parallel brake unit cannot be resistance value, consult local dealers for the power calculation. less than the value in the column “Min. Resistor Value (Ω)”. Read the wiring information in the brake unit instruction sheet thoroughly prior to operation. Visit the following links to get the instruction sheets for the wiring in the brake unit:
VFDB2015 / 2022 / 4030 / 4045 / 5055 Braking Modules Instruction Sheet http://www.deltaww.com/filecenter/Products/download/06/060101/Option/DELTA_IA-MDS_VFDB_I _EN_20070719.pdf 7-4 NOTE