Manufacturer: Ziehl‑Abegg (Germany)
Model: RH50M‑4DK.6F.1R (code: 107634)
Product Type: AC Centrifugal Fan (Backward Curved)
Impeller Size: 500 mm
Motor Model: MK137‑4DK.15.N (3‑Phase External Rotor)
Rated Voltage (Delta): 3‑phase 230 VAC
Rated Voltage (Star): 3‑phase 400 VAC
Frequency: 50/60 Hz
Rated Speed: ~1340 / 1520 RPM (50/60 Hz)
Power Input: ~820 / 1250 W (50/60 Hz)
Rated Current @230 V: ~2.70 / 3.60 A (50/60 Hz)
Rated Current @400 V: ~1.55 / 2.10 A (50/60 Hz)
Starting Current @230 V: ~7.80 A
Starting Current @400 V: ~4.50 A
Max Airflow: ~8850 / 9900 m³/h (50/60 Hz)
Max Static Pressure: ~520 / 700 Pa (50/60 Hz)
Noise Level: ~74 dB(A)
Impeller Material: High‑performance Zamid composite (blue)
Rotor Material: Die‑cast aluminum
Number of Blades: 7
Bearing Type: Dual ball bearings
Protection Class: IP54
Insulation Class: F (155 °C)
Motor Protection: Thermal contact (TK) wired to terminals
Operating Temperature Range: ‑40 °C to +70 °C
Termination: Terminal box with Star/Delta switchable
Direction of Rotation: Clockwise (viewed toward rotor)
Typical Applications: Heavy‑duty industrial ventilation, cooling of inverters and heat exchangers, HVAC infrastructure, frequency converter cooling systems
