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FRENIC-eRHC is Fuji Electric’s compact power regenerative PWM converter, catalogued as RHC. It is not a motor drive and has no motor output: it feeds an inverter’s DC link.
As an Active Front End it replaces the inverter’s own diode rectifier and draws a sinusoidal input current; as an electronic braking resistor it returns braking energy to the mains instead of burning it, continuously and at 100 per cent rating. Ratings are stated as applied inverter capacity, not motor power: 5.5 to 22 kW on three-phase 200 V and 5.5 to 75 kW on three-phase 400 V, with 150 per cent overload for one minute.
Power factor is 99 per cent at full load and RS-485 is standard. It cannot run alone or be tested as a drive: a boosting reactor, a harmonic filter reactor, a charging contactor and resistor and an AC fuse are all required, so a fault in any of them presents at the converter.
Active Front End operation drawing sinusoidal input current, with 1.6 % fifth harmonic content against 65 % for a diode front end
Input power factor of 99 % at 100 % load
Regenerated energy returned to the supply rather than burned in a braking resistor
Continuous regenerative operation at 100 % rating, 150 % for one minute
One converter can serve several inverters when sized on their total capacity
RS-485 communications as standard, with a keypad shared with FRENIC-Ace
Ten year design life for the main circuit capacitor, board electrolytics and cooling fan at 40 °C and 80 % load
| Manufacturer | Fuji Electric |
|---|---|
| Series | FRENIC-eRHC |
| Type | PWM converter (regenerative), Compact Unit Type (C) |
| Voltage Classes And Capacity | Three-phase 200V: 5.5kW to 22kW; Three-phase 400V: 5.5kW to 75kW (applied inverter capacity) |
| Model Code Structure | RHC[Rating]C-[Voltage]EJ (Voltage: 2 = 200V, 4 = 400V) |
| Communications | RS-485 communications as standard |
| Design Life | Components with limited life time designed to operate for 10 years |
| Compliance | Expected to comply with the EC Directive (CE Marking) |
| Product Status | Current in Europe and Japan, not sold in the Americas. Inverter Drive Repair offers inspection, repair and refurbishment. |
| Typical Applications | Highly frequent acceleration and deceleration duties; vertical applications |
| Voltage class | Model | Applied Inverter Capacity (kW) |
|---|---|---|
| Three-phase 200V | RHC5.5C-2EJ | 5.5 |
| Three-phase 200V | RHC7.5C-2EJ | 7.5 |
| Three-phase 200V | RHC11C-2EJ | 11 |
| Three-phase 200V | RHC15C-2EJ | 15 |
| Three-phase 200V | RHC18.5C-2EJ | 18.5 |
| Three-phase 200V | RHC22C-2EJ | 22 |
| Three-phase 400V | RHC5.5C-4EJ | 5.5 |
| Three-phase 400V | RHC7.5C-4EJ | 7.5 |
| Three-phase 400V | RHC11C-4EJ | 11 |
| Three-phase 400V | RHC15C-4EJ | 15 |
| Three-phase 400V | RHC18.5C-4EJ | 18.5 |
| Three-phase 400V | RHC22C-4EJ | 22 |
| Three-phase 400V | RHC30C-4EJ | 30 |
| Three-phase 400V | RHC37C-4EJ | 37 |
| Three-phase 400V | RHC45C-4EJ | 45 |
| Three-phase 400V | RHC55C-4EJ | 55 |
| Three-phase 400V | RHC75C-4EJ | 75 |
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