Delta IED-S Series User Manual page 78

NOTE
1. Select the resistance value, power and brake usage (ED %) according to Delta rules.
Definition for Brake Usage ED%
For safety, install a thermal overload relay between the brake unit and the brake resistor in conjunction
with the magnetic contactor (MC) at the drive mains input for additional protection. The thermal overload
relay protects the brake resistor from overheat damage due to frequent or continuous braking. Under
such circumstances, turn off the power to prevent damage to the brake resistor and the drive. NOTE:
Never use it to disconnect the brake resistor.
2. Any damage to the drive or other equipment caused by using brake resistors and brake units that are not
provided by Delta voids the warranty.
3. Consider environmental safety factors when installing the brake resistors. If you use the minimum
resistance value, consult your local dealers for the power calculation.
4. When using more than two brake units, the equivalent resistor value of parallel brake unit cannot be 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
 VFDB4110 / 4160 / 4185 Braking Modules Instruction Sheet
http://www.deltaww.com/filecenter/Products/download/06/060101/Option/DELTA_IA-MDS_VFDB4
110-4160-4185_I_EN_20101011.pdf
Chapter 6 Optional Accessories | IED-S
6-5