Delta C2000 Series User Manual page 113

Chapter 7 Optional AccessoriesC2000
3. 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.
4. Consider environmental safety factors when installing the brake resistors. If you use the minimum
resistance value, consult local dealers for the power calculation.
5. When using more than two brake units, the equivalent resistor value of the parallel brake unit cannot be
less than the value in the column "Minimum Resistor Value (Ω)". Read the wiring information in the brake
unit user manual thoroughly prior to operation.
6. This chart is for normal usage; if the AC motor drive is applied for frequent braking, it is suggested to
enlarge 2~3 times of the Watts.
7. Thermal Overload Relay (TOR), for 230V / 460V / 690V models: Choosing a thermal overload relay is
based on whether its overload capacity is appropriate for the C2000. The standard braking capacity of the
C2000 is 10% ED (Tripping time=10 s). As shown in the figure below, the thermal overload relay
continuously operates for 10 seconds and it can withstand a 260% overload (Host starting). For example, a
460V, 110 kW C2000 has a braking current of 126 A (refer to the tables in this section), so it can use the
thermal overload relay with a rated current of 50 A. The property of each thermal relay may vary among
different manufacturer, please carefully read specification.
60
40
30
20
10
8
6
4
3
2
1
0.8
0.6
0.4
0.3
0.8 1 2
1.5
Multiple of current setting
Figure 7-5
7-6
5
4 6 7 8 9 10
3
xln (A)
15