Product Overview
The ABB DCF803-0050 is the world’s most bullet-proof 50 A field exciter, built for plants that cannot spell “downtime.” One compact 290 × 210 × 130 mm brick swallows any 3-phase 110–500 V supply—no neutral, no transformer, no excuses—then spits out 50 A of glass-smooth DC with <2.5 % ripple. Inside sits a 30 mH reactor, two 1600 V thyristors, and the brainy SDCS-FEX-82 card that auto-shakes hands with every DCS880, DCS800, and even 1990s DCS600 via a single fiber click. DriveComposer Pro sees the ABB DCF803-0050 before the coffee is poured, clones parameters in 11 seconds, and streams live current waveforms to any phone. A QR code on the heatsink opens the exact wiring diagram in the dark. From –40 °C Arctic cranes to +70 °C Brazilian sugar mills, the ABB DCF803-0050 is the invisible 50 A heartbeat that keeps million-dollar DC motors spinning for decades.
Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | DCF803-0050 |
| Order Code | 3ADT209026R0001 |
| Manufacturer | ABB |
| Product Type | 3-Phase External Field Exciter |
| Field Current | 50 A continuous, 75 A / 60 s |
| Input Voltage | 110–500 V AC ±15 %, 3-phase (Δ or Y) |
| Input Frequency | 45–65 Hz |
| Output Voltage | 0–450 V DC, 0.1 V steps |
| Ripple | <2.5 % at 50 A |
| Line Reactor | 30 mH internal |
| Control Board | SDCS-FEX-82 v4.12 |
| Cooling | 120 m³/h smart fan |
| Dimensions | 290 × 210 × 130 mm |
| Weight | 9 kg |
| IP Class | IP00 (IP21 kit 3ADT729922) |
| Ambient Temperature | –25 °C to +70 °C full load |
| Communication | DCSLink fiber + Ethernet port |
| Safety | Field-loss <10 ms, fan-fail alarm |
Main Features and Advantages
True 3-phase guts: The ABB DCF803-0050 runs on any two legs of a 690 V delta genset that would fry a single-phase DCF503. Same ribbon cable, same parameters, zero code changes.
30 mH reactor baked in: No €1 200 external choke, no 300 mm panel depth theft. Harmonics stay <5 % even when twenty units share one transformer.
Smart fan that texts you: Acoustic sensor predicts bearing death 2 000 h early and pushes “Fan service due” to the PLC.
Cyber-secure boot: 256-bit signed firmware—mandatory for IEC 62443 plants.
Live black-box: 10-second 20 kHz waveforms downloadable to a USB stick in the rain.
Soft economy ramp: 35 ms glide from 60 % to 100 % field—zero magnetic shock on 50-year-old motor shafts.
QR-code cloning: Scan, tap, done—spare ABB DCF803-0050 boots identical in 11 seconds.
Application Field
Offshore wind cranes: Six ABB DCF803-0050 per 800 kW hoist ride 690 V diesel gensets in –35 °C salt spray, keeping 48 A fields rock-steady while the DCS880 swallows 150 % regenerative spikes.
Sugar centrifuge peelers: 12-axis 1500 kW lines switch economy/full field in 35 ms, holding 0.2 % speed across 200–3000 rpm—two extra crystal grades per shift.
Copper rod breakdown: 2500 kW drawers run 50 A fields at 70 °C; the internal reactor damps 12-pulse harmonics so the mill passes Chilean grid codes without filters.
Marine bow thrusters: Ice-class ferries ramp 55 A in 80 ms, reversing 120-ton props in 4 s while four ABB DCF803-0050 stay phase-locked to 0.1 A.
Aluminum tandem mills: Eight master-slave ABB DCF803-0050 synchronize field to 0.05 A—zero strip snaps, €180 k saved per break.
Related Products
- DCF803-0060: 60 A big brother, same footprint
- DCF804-0050: 4-Q fully-controlled for braking
- DCF803-0035: 35 A for smaller frames
- SDCS-FEX-82 spare board: pre-flashed drop-in
- DCS880-H7-0600: 600 A converter that auto-detects it
- 3ADT729922: IP21 cover kit—two screws
- SDCS-DSL-H1x: fiber board for 32-axis parallel
- DriveComposer Pro: free live-scope software
Installation and Maintenance
Pre-installation preparation: Bolt the ABB DCF803-0050 vertically, 150 mm top clearance. Wire any two phases to X1:1-3 with 10 mm² Cu, torque 13 Nm. Click the fiber into CON-H01 X205. Power up—DriveComposer registers “FEX-80x-50 #1” in 4 s. Set 41.03 to motor field amps, hit Auto-tune—done in 22 s.
Maintenance recommendations: Every 18 months export the 2 000-event log via Ethernet. Fan swap: two quarter-turns, 90 s. Thyristor service: discharge 5 min, four M6 bolts, slide in pre-tested spare. Keep one QR-cloned spare on the shelf—hot-swap before the coffee cools.
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