Description
The ebm-papst K3G097-AT87-P2 (also known as K3G097AT87P2) is an advanced 80 VDC dual-inlet forward-curved centrifugal blower engineered specifically for demanding railway and rolling stock installations. Driven by an integrated M3G074-CF brushless DC motor, this compact 97 mm (3.82 in) blower assembly generates an impressive free-air flow rate of 640 CFM (1085 m³/h) while consuming only 260 W at nominal 3250 RPM, with operational capability reaching 5305 RPM against high static resistance up to 3.01 in H₂O (750 Pa). Built with rugged flame-retardant PA plastic scroll housings and impellers, it incorporates sealed heavy-duty ball bearings and an open-rotor architecture that achieves an exceptional IP6K9K ingress protection level. The unit comes fully wired via a 10-conductor halogen-free railway harness providing seamless digital network integration through RS-485 MODBUS-RTU and analog 0–10 V / PWM speed regulation.
Key Features
- Railway-Grade Compliance: Certified to EN 45545-2 HL3, EN 50155, and EN 61373 Cat 1B for extreme vibration, shock, and fire safety.
- High-Static Aerodynamics: Delivers up to 640 CFM (1085 m³/h) and sustains continuous high-backpressure delivery reaching 3.01 in H₂O (750 Pa).
- Extreme IP6K9K Protection: Sealed construction and specialized electronics potting provide comprehensive water and dust ingress resistance against high-pressure washdown.
- Integrated RS-485 MODBUS: Features full digital MODBUS-RTU bus networking alongside standard 0–10 VDC / PWM inputs and a 10 VDC reference output.
- Advanced System Diagnostics: Integrated floating status relay provides isolated run monitoring and instantaneous operational feedback under mains or DC loads.
- Active Motor Safeguards: Equipped with soft start, power limiting, active thermal protection, reverse polarity safeguards, and over/undervoltage line cutoffs.
- Low-Smoke Halogen-Free Harness: Supplied with a 10G 1.0 mm² EN 45545-compliant lateral cable harness terminating in lead tips for secure transit hookups.
Technical Specifications
| Manufacturer | ebm-papst |
|---|---|
| Manufacturer Part Number (MPN) | K3G097-AT87-P2 |
| Alternate Part Number | K3G097AT87P2 |
| Integrated Motor Model | M3G074-CF |
| Product Series | K3G097 Series |
| Product Category | EC Centrifugal Fans |
| Fan / Component Type | EC dual centrifugal fan with housing |
| Phase & Supply Type | Brushless DC / Electronically Commutated (EC) |
| Nominal Voltage | 80 VDC |
| Operating Voltage Range | 56 to 100 VDC |
| Speed (RPM) | 3250 RPM (Free Air) / up to 5305 RPM (at 750 Pa) |
| Power Rating | 260 W (Nominal) / 266 W (Max at 750 Pa) |
| Rated Current | 3.30 A |
| Max. Current Draw | 3.33 A |
| Standby Current | < 500 µA |
| Airflow | 640 CFM (1085 m³/h) |
| Min. Back Pressure | 0 in H₂O (0 Pa) |
| Max. Back Pressure (Measured) | 3.01 in H₂O (750 Pa) |
| Airflow Direction | Centrifugal dual radial discharge |
| Impeller Size | Ø 97 mm (3.82 in) |
| Overall Dimensions (L × H × D) | 351.5 × 157.5 × 217.5 mm (13.84 × 6.20 × 8.56 in) |
| Mounting Hole Pitch | 335 × 100 mm / 325.5 × 100 mm (12× Ø 5.0 mm holes) |
| Housing Material | PA plastic |
| Impeller Material | PA plastic (Forward-curved) |
| Bearing Type | Sealed precision ball bearings |
| Direction of Rotation | Clockwise, viewed toward rotor |
| Installation Position | Any |
| Condensation Drainage Holes | None, open rotor |
| Operating Mode / Duty Cycle | S1 (Continuous) |
| Weight | 2.6 kg (5.73 lbs) |
| Termination & Cable Specs | Halogen-free cable EN 45545, 10G 1.0 mm² with 10x lead tips |
| Cable Exit | Lateral |
| Wiring Pinout / Connection | Brown (+), Black (-), Green/Yellow (PE), Gray (COM), Purple (NO), Red (+10V), Yellow (0-10V), White (RSA), Orange (RSB), Blue (GND) |
| Status Relay Contact Rating | 250 VAC / 30 VDC max. 2 A (AC1), min. 1 mA / 5 VDC |
| Fixed Voltage Output | +10 VDC ±3%, max. 10 mA (SELV, short-circuit-proof) |
| Analog Control Input | 0 to 10 VDC / PWM (SELV, Ri = 100 kΩ) |
| Serial Bus Interface | RS-485 MODBUS-RTU (SELV) |
| Memory Endurance | EEPROM write cycles: 100,000 maximum |
| Motor Protection | Electronic thermal overload, line over/undervoltage, power limiter, current limit, reverse polarity |
| Electrical Protection Class | Class I (with customer PE connected) |
| Insulation Class | Class B |
| Ingress Protection (IP) | IP6K9K |
| Moisture / Environmental Class | H3 |
| Operating Temperature | -40 °C to +50 °C (-40 °F to +122 °F) |
| Storage Temperature | -40 °C to +80 °C (-40 °F to +176 °F) |
| Service Life (L10) | 40,000 hours (typical) |
| Standards & Compliance | EN 45545-2 HL3: 2013 + A1:2015, EN 50155: 2008, EN 61373 Cat. 1B: 2010, EN 50121-3-2, CE, EAC |
Applications
The ebm-papst K3G097-AT87-P2 dual centrifugal blower is engineered for rolling stock passenger coach HVAC climate units, driver cab air circulation, and onboard traction converter cooling ducting. It provides high-reliability thermal exhaust within locomotive auxiliary power converter enclosures, battery compartment forced venting, and underfloor electrical containment cubicles. Furthermore, its severe-washdown rating and rugged fire-safe design make it suitable for interurban light rail transit cars, mining locomotives, and specialized railway track maintenance vehicles.
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