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The Blauberg GY-B250E-EC-05 is a three-phase 380 VAC EC backward-curved centrifugal plug fan with an aluminium-alloy impeller. It operates at a rated speed of 4100 RPM and supports 0-10 V, PWM and RS485 MODBUS-RTU control.
| Model | GY-B250E-EC-05 | Product Type | EC Backward-Curved Centrifugal Plug Fan |
| Phase | 3~ | Rated Voltage | 380 VAC |
| Voltage Range | 304-460 VAC | Frequency | 50/60 Hz |
| Rated Speed | 4100 RPM (+/-5%) | Maximum Input Power | 750 W |
| Maximum Input Current | 1.4 A | Sound Level | 92 dB(A) |
| Ambient Temperature | -25 deg C to +60 deg C | Conformity | CCC, CE, RoHS |
| Dimensions | 400 x 400 x 254.5 mm | Weight | 12.8 kg |
| Impeller | Aluminium alloy, 8 blades | Rotation | Clockwise, viewed toward rotor |
| Degree of Protection | IP20 | Insulation Class | Class F |
| Duty / Bearing | S1 / Ball bearing | Installation Position | Any |
| Control | 0-10 VDC, PWM, RS485 MODBUS-RTU | Voltage Output | 10 VDC, max. 10 mA |
| Protection | Locked-rotor, thermal, overvoltage, undervoltage, overcurrent and soft-start protection | Cable Length | 500 +/-50 mm |
| 1 | Charging Column | 9 | Equipment Cooling Project |
| 2 | Kitchen Smoke Exhaust System | 10 | Ventilation Unit Project |
| 3 | FFU Project | 11 | AHU Project |
| 4 | Computer Room Cooling | 12 | Air Purifier Project |
| 5 | Rail Transit Air-Conditioning | 13 | Heat Exchanger Project |
| 6 | Electrical Appliances | 14 | Telecom Container Project |
| 7 | FanGrid Project | 15 | Data Center Cooling Project |
| 8 | Ventilation Equipment Project | 16 | Industrial Cooling System |
Air performance was measured according to AMCA210/GB1236 installation category A. The curve covers approximately 0-3400 m3/h and 0-1850 Pa. Values apply under the specified measuring conditions and may vary with installation conditions.
| Line | Connection | Designation | Colour | Function |
|---|---|---|---|---|
| Power | PE | PE | Green / Yellow | Protective earth |
| Power | U0 / U1 / U2 | L1 / L2 / L3 | Brown / Blue / Black | Three-phase power supply |
| Power | U3 / U4 | NC / COM | White / Gray | Status relay, 250 VAC / 2 A |
| Control | U5 / U6 | RSA / RSB | Brown / Gray | RS485 MODBUS interface |
| Control | U7 | Speed Control | Yellow | 0-10 V / PWM input |
| Control | U8 / U9 / U10 | FG / +10 V / GND | White / Red / Blue | Tach output / auxiliary output / control ground |
Wiring Label
Wiring diagram for signal feedback
Note
Connect the power and control lines strictly according to the wiring diagram.
Do not connect the white signal wire directly to the red signal wire or an external DC power supply.
If the fan does not start, check the speed-control input voltage and wiring. Do not touch the impeller or rotor after power is applied.
The fan takes several seconds to start. Do not touch the impeller or rotor while energized or at low speed.
Check that the motor is installed securely before power-on.
Do not pull the power cable; a damaged cable must be replaced by the manufacturer.
Do not drop or impact the motor.
Do not flush the motor.
Consult Blauberg before use outside the agreed operating conditions.
The motor casing may remain hot after operation; use burn-protection measures if necessary.
Keep debris out of the casing during installation.
Turn the rotor by hand before start-up and confirm that it moves without collision or jamming.
The motor must not operate without an impeller or load.
Store the repacked product in a clean, ventilated warehouse at -40 deg C to +80 deg C, RH no more than 95%, without corrosive gases, at least 15 cm above the floor.
Keep the fan out of reach of children.
The final interpretation right of this specification belongs to Blauberg.
Life and maintenance, warranty
The design life is 50,000 hours, limited by ball-bearing life at 40 deg C. Actual service life varies with temperature, humidity, installation, load and other use conditions.
Clean and maintain the fan every 3-6 months according to the environment.
The whole-machine warranty period is two years from purchase/delivery. Damage caused by improper disassembly, handling, man-made damage, natural disasters or force majeure is excluded.
GY-B250E-EC-05-Technical-Specification.pdf
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