ANYHZ FST-500 Series, Manual, Page: 133 / 151

FST 500 Manual
- Page 133 -
right-most column in the table).
7. Please read the wiring information in the user manual of the brake unit thoroughly prior to
installation and operation.
8. In applications with brake resistor or brake unit, Pr.25 (Over-voltage stall prevention) must be
disabled. And Pr.102 (AVR function) shall not be used.
9. Definition for Braking Usage ED%
Explanation: The definition of the barking usage ED(%) is for assurance of enough time for the
brake unit and brake resistor to dissipate away heat generated by braking. When the brake resistor
heats up, the resistance would increase with temperature, and braking torque would decrease
accordingly. Suggest cycle time is one minute
10. For safety reasons, install a thermal overload relay between brake unit and brake resistor. Together
with the magnetic contactor (MC) in the mains supply circuit to the drive it offers protection in case
of any malfunctioning. The purpose of installing the thermal overload relay is to protect the brake
resistor against damage due to frequent braking or in case the brake unit is continuously on due to
unusual high input voltage. Under these circumstances the thermal overload relay switches off the
power to the drive. Never let the thermal overload relay switch off only the brake resistor as this will
cause serious damage to the AC Motor Drive.
B.1.1 Dimensions and Weights for Brake Resistors& Brake Units
(Dimensions are in millimeter)