Wire-wound tubular resistors FW
Construction and execution
Our tubular resistors contain a ceramic resistor element with a resistor winding made of CuNi or CrNi. The standard mode is installed on angle brackets or, if requested, with mounting plates. The resistors are available in single, double or triple designs (starting at FW30) and with or without a protective case (starting at FW40). On request, we provide the option of a silicon coated finish and additional tabs.Features
- Nominal power range: 12 W up to 3'000 W
- Standard tolerance: K (±10%) (tighter tolerances on request)
- Temperature coefficient: +40 ppm up to +80 ppm
Application fields
- Starter resistors for compressors
- Neutral point earthing resistors
- Braking resistors for drives with frequency converters
Program of fabrication
Our standard production program contains 6 series.| Type | Tube Ø mm |
Tube length mm |
Power W |
Resistance | Sheet |
| FW 15 | 15 | 50-200 | 12-60 | R25-10K2 | |
| FW 18 | 18 | 75-200 | 25-80 | R21-12K3 | |
| FW 22 | 22 | 80-200 | 35-100 | R28-15K | |
| FW 30 | 30 | 100-200 | 50-125 | R14-18K8 | |
| FW 40 | 40 | 120-400 | 80-400 | R151-28K2 | |
| FW 60 | 60 | 300-500 | 450-800 | R72-53K |