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FR-BU2-H30K

The FR-BU2-H30K is a braking unit designed for Mitsubishi FR series inverters, used to safely dissipate regenerative energy from motors during deceleration or load braking. It helps protect the inverter from overvoltage faults by directing excess energy to an external braking resistor.

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Key Specifications
Parameter Value
Model FR-BU2-H30K
Compatible Inverters Mitsubishi FR-A800, FR-F800, FR-E800 series
Rated Braking Capacity 30 kW (Continuous)
Maximum Braking Power H30K: 30kW @ 10% duty cycle
DC Voltage Threshold Approx. 720V (Automatic activation)
Connection Type Screw terminals (for resistor & inverter)
Protection Features Overheat protection (thermal relay)
Ambient Temperature -10°C to +50°C (Non-freezing)
Cooling Method Natural air cooling (no fan)
Weight Approx. 4.5 kg
3. Wiring & Installation
Input: Connects to the inverter’s P/+ and N/- terminals.

Output: Connects to an external braking resistor (e.g., FR-BR-H30K).

Duty Cycle: Designed for intermittent braking (10% ED typical).

4. Compatible Braking Resistors
FR-BR-H30K (Recommended 30kW resistor)

Custom resistors (must match 30kW, 40Ω max specifications).

5. Safety & Certifications
Overheat Protection: Thermal relay trips if temperature exceeds safe limits.

CE, UL/cUL Listed (Industrial standards).