Mitsubishi Electric 800 Series Instruction Manual (Function page 489

• When the regenerative brake transistor is damaged, install a thermal relay to prevent overheat and burnout of the brake
resistor. (Refer to the Instruction Manual (Connection) to install a thermal relay.) Properly select a thermal relay according
to the regenerative driving frequency or the rated power or resistance of the brake resistor.
CAUTION
• If the resistor selection is incorrect, overcurrent may damage the inverter built-in brake transistor. Besides, the resistor
may be burned due to overheat.
• If the selection of the thermal relay is incorrect, the resistor may be burned due to overheat.
Parameters referred to
Pr.57 Restart coasting timepage
Pr.178 to Pr.189 (Input terminal function
Pr.190 to Pr.196 (Output terminal function
488
17. (G) Control Parameters
17.8 Regenerative brake selection
443, page 449
selection)page 368
selection)page 332