This product is a direct current tachogenerator produced by Marquardt. The model is KTD 3-. B 5 Y 3. It is a non-powered tachogenerator with high response rate, large speed range, recognition of rotation direction, small percentage ripple and other features.
The KTD 3 series DC tachogenerator provides high reaction rate, a large speed range, and direction recognition without requiring an external power supply. It is offered in B5 Y3 and B10 versions with different shaft diameters and mass moments of inertia.
Mechanical data include an IP54 protective class, alloy metal housing, and shaft diameters of 9 mm (B5 Y3) and 11 mm (B10). Electrical characteristics are referenced to 1000 rpm, with rated voltages and currents varying by model. Options such as terminal boxes, centrifugal switches, and enhanced protective classes are available, and carbon brushes are rated for roughly 20 000 hours of operation.
| Protective class | IP 54 |
|---|---|
| Shaft diameter (B5 Y3) | 9 mm |
| Shaft diameter (B10) | 11 mm |
| Mass moment of inertia (KTD 3‑1 to 3‑3) | 660 g·cm² |
| Mass moment of inertia (KTD 3‑4 to 3‑6) | 970 g·cm² |
| Number of pole pairs | 2 (4 poles) |
| Reversing error | < +0.1 % |
| Residual ripple | < 0.4 % |
| Linearity error | 50.15 % |
| Carbon brush life | ≈ 20 000 h after 10 000 h in service |
It has an IP54 protective class according to DIN 40 050 and IEC 529.
The shaft diameter for the B5 Y3 version is 9 mm.
It has 2 pole pairs, which corresponds to 4 poles.
The carbon brushes are rated for about 20 000 hours of operation after an initial 10 000 hours in service.