C620 - MagnumMacKivler/RLCPT2 GitHub Wiki
Image Copyright Alco Products
The C620 was introduced in 1963 as a direct competitor to the SD28, none were ever built, however, Alco approached Cambria & Indiana with an offer to replace aging 1200 horsepower switchers, but they instead went with SW1500s.
PT-Specific Information
| General Info | - |
|---|---|
| Prime Mover | ALCO 12-251C |
| Horsepower | 2000 |
| Truck Type | Alco Trimount (1) |
| Axles | 6 |
| Traction Motors | 6 |
| Minimum Weight | 340,000 lbs |
| Maximum Weight | 420,000 lbs |
| Model Base Speed | 70 MPH (2) |
| Top Speed | 70, 80, or 86 MPH (2) |
| Electrical System | - |
|---|---|
| Generator Max Current | 5400 Amps |
| Max Traction Motor (TM) Current | 1800 Amps |
| Max Continuous TM Current | 1195 Amps |
| Traction Motor Type | DC |
| Factor of Adhesion | 25% (1) |
| Transition Mode | Automatic with Selector |
| Transition Groups | 2, 2, 1, 1 |
| Transition Shunts | 1, 0.75, 1, 0.75 |
| Generator Transition | No |
| Traction Control | APR |
| Dynamic Braking (DB) Mode (if used) | Mechanical Blowers @ 50% |
| DB Max Current | 830 Amps |
| DB Max Continuous Current | 830 Amps |
| Blended Braking | No |
| Miscellaneous | - |
|---|---|
| Head-End Power (HEP) | No |
| HEP Power Consumption | N/A |
| HEP Standby/Run Mode | N/A |
| Load Ramp Speed | 10 Amps/Tick |
| TM Overload Protection | No |
| Starter Mode | Latched Primer, Manual Start |
| Air Brake Schedule | 26-L |
| Compressor CFM | 230.625 (Wabco 3CDC @ 1025 RPM) |
| Main Reservoir Volume | 35.2 Cubic Feet |
Notes
⚠: Not Verified or Educated Guess
(1): Late production C620s could be bought with Alco's three-axle Hi-Ad, boosting the adhesion to 29%.
(2): Later in production the gearing options changed, making the base speed 67 MPH and the max speeds 67, 75, 79, or 84 MPH