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FRENIC-eRHR is Fuji Electric’s compact power regenerative converter, catalogued as RHR. It is not a motor drive and has no motor terminals. It sits alongside an inverter driving vertical transport, conveyors and similar loads, and returns braking energy to the mains instead of turning it into heat in a braking resistor, so the panel runs cooler and needs no clearance around a resistor.
Control is by the 120 degree conduction method rather than a sinusoidal active front end, so only two external parts are needed: a current suppressing reactor and a power supply adjusting reactor. Eighteen models cover three-phase 200 V from 5.5 to 30 kW and three-phase 400 V from 5.5 to 75 kW, and RS-485 is standard.
Only the 400 V models carry a European declaration of conformity, issued against EN 62477-1, the converter safety standard rather than the drive standard, so a 200 V unit is a Japanese market machine.
Braking energy returned to the supply rather than burned off in a resistor
No braking resistor needed, which cuts panel heat and allows a more compact control panel
Continuous regenerative braking, which a braking resistor and braking unit cannot sustain
Only two peripherals: a current suppressing reactor and a power supply adjusting reactor
The power supply adjusting reactor can be omitted where the supply meets Fuji’s stated capacity condition
RS-485 communications as standard, with a touch panel operated in the same way as FRENIC-Ace
Ten year design life for the main circuit capacitor, PCB electrolytics and cooling fan at 40 °C and 80 % load factor
| Manufacturer | Fuji Electric |
|---|---|
| Series | FRENIC-eRHR |
| Type | Power regenerative converter, Compact Unit Type (C); RHR = Regenerative Converter |
| Voltage Classes And Capacity | Three-phase 200V: 5.5kW to 30kW; Three-phase 400V: 5.5kW to 75kW (standard applicable motor ratings) |
| Model Code Structure | RHR[Rating]C-[Voltage]EJ (Voltage: 2 = 200V, 4 = 400V) |
| Communications | RS-485 communications as standard |
| Design Life | 10 years for capacitors, electrolytic capacitors on PCBs, and cooling fans (ambient temperature +40 degrees C, load factor 80%) |
| Compliance | CE marking covers the three-phase 400V class only. EU Declaration of Conformity SI276503_010_C, issued 2026-06-11, lists models RHR5.5C-4E to RHR75C-4E against EN 62477-1, EN 61800-3 and EN IEC 63000. The three-phase 200V models are not covered. |
| Product Status | In current production, with the three-phase 400 V models CE declared for Europe. Inverter Drive Repair offers inspection, repair and exchange units. |
| Typical Applications | Elevators, escalators, overhead traveling cranes, multi-story parking garages, industrial-use mixers and conveyors |
| Voltage class | Model | Rating |
|---|---|---|
| Three-phase 200V | RHR5.5C-2EJ | 5.5 |
| Three-phase 200V | RHR7.5C-2EJ | 7.5 |
| Three-phase 200V | RHR11C-2EJ | 11 |
| Three-phase 200V | RHR15C-2EJ | 15 |
| Three-phase 200V | RHR18.5C-2EJ | 18.5 |
| Three-phase 200V | RHR22C-2EJ | 22 |
| Three-phase 200V | RHR30C-2EJ | 30 |
| Three-phase 400V | RHR5.5C-4EJ | 5.5 |
| Three-phase 400V | RHR7.5C-4EJ | 7.5 |
| Three-phase 400V | RHR11C-4EJ | 11 |
| Three-phase 400V | RHR15C-4EJ | 15 |
| Three-phase 400V | RHR18.5C-4EJ | 18.5 |
| Three-phase 400V | RHR22C-4EJ | 22 |
| Three-phase 400V | RHR30C-4EJ | 30 |
| Three-phase 400V | RHR37C-4EJ | 37 |
| Three-phase 400V | RHR45C-4EJ | 45 |
| Three-phase 400V | RHR55C-4EJ | 55 |
| Three-phase 400V | RHR75C-4EJ | 75 |
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