External brake resistor is a necessity for all VFDs. It can be selected according to brake energy and brake torque.
|Brake unit and Brake resistor|
|1. Brake unit is built-in for VFD power equal and under 22kw, and is not included(optional) for VFD over 22kw.
2. External brake resistor is a necessity for all VFDs. It can be selected according to brake energy and brake torque. In below form there is the minimum resistance and power value to match different model. In actual use, the brake power value must be higher than that in the form, and the selection of the braking resistor power based on braking energy.
|Model||Brake Unit||Minimum Resistance (Ω)||Minimum Power(kw)|
|S300A/E-7-4T 132K||Optional to built-in||2.6||147.84*k||K refers to brake frequency. K differs in industry and below can be taken as reference.
Oil pumping unit: k=10%-20%
Centrifugal machine: k=5%-20%
Unwinder and rewinder machine: k=50%-60%
Occasionally brake load: k=5%-10%
|Reactor Selection Instruction|
|1. Input AC/DC reactor is a necessity for 160kw or higher power VFD; and is optional for power equal and under 132kw VFD.
2. Output AC reactor is optional, can be decided accroding to final application places.
|Model||Input AC Reactor Model (2%)||Output AC Reactor Model||DC Reactor Model|
|S300A/E-7-4T 132K||SAL-INPUT -1320||SAL-OUTPUT -1320||SDL-PN -1320|
|Size||Model||Input Rated Voltage(V)||Input Rated Current(A)||Output Rated Current(A)||Adaptable Motor(kw)||Adaptable Motor(hp)|
|Micctech VFD power various from 5.5kw-160kw, has 15 styles in total and they share 6 sizes.|
|Size||Model||A(mm)||B(mm)||B1(mm)||H1(mm)||W(mm)||D(mm)||Installation Hole Diameter (mm)|