Delta VFD300C43S-HS User Manual page 76

Chapter 7 Optional AccessoriesC2000-HS
the wiring information in the user manual of brake unit thoroughly prior to operation.
5. 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.
6. Thermal Overload Relay: Choosing a thermal overload relay is based on whether its overload capacity is
appropriate for the C2000-HS. The standard braking capacity of C2000-HS is 10%ED (Tripping time=10s).
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 AC motor drive 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.
7-4
Figure 7-3