Low voltage DC drives
ABB DC Drives
DCS800, 10 to 4000 hp
- Current Ratings – Modules
- Dimensions and Weights
- Technical Diagram
- Plug-in Options
- Feedback Options
- Communication Options
Fieldbus Control - External Field Supply
External Field Supply
General Data
- Currents from 0.3 to 520 A
- Minimum field current monitor
- Integrated external field power converter or completely separate switchgear cubicle
- Single-phase or 3-phase model
- Controlled by serial communication via DSL board
The three-phase field power converter causes less voltage stress on the motor over the single-phase field converter. This is because rectifying three-phase power provides a smoother DC voltage.
For single-phase operation, we recommend integrating an auto transformer in the field power converter’s supply circuit to adjust the AC input voltage to the field voltage and to reduce the voltage ripple in the field circuit.
All field converters are controlled by the armature converter via a serial interface (SDCS-DSL-4 board). This interface serves to set-up, control and diagnose the field converter and thus provides an option for exact control.
Reactor for Field supply on the D5 Drive:
The D5 drive with plus code +S164 has internal field supply FEX425-INT. This field supply should be seperately powered and requires its own line reactor as identified below.
Field Supply Types
DCF803-0016, DCF803-0035 and FEX425
- Three-phase or single-phase operation
- Full-wave half-controlled thyristor/diode bridge
- Microprocessor control, with the electronic system being supplied by the armature-circuit converter (24 V)
- Construction and components have been designed for an insulation voltage of 600 Vac
- Fast-response excitation is possible with an appropriate voltage reserve; de-excitation takes place by field time constant
- Field Output voltage UA (single-phase operation):
TOL = tolerance of line voltage in %
UV = Line voltage
UA = Field voltage
- Recommendation (single-phase operation):
UA= 0.6 to 0.8 * UV or UV = 1.25 to 1.7 * UA - Field Output voltage UA (three-phase operation):
TOL = tolerance of line voltage in %
UV = Line voltage
UA = Field voltage
- All except FEX-425 must be externally fused. See table below for selection.
- DCS800-DSL communications cable required.
Table of field converter units
| Unit type | Output current IDC |
AC field supply voltage |
Auxiliary supply voltage |
Comments |
| DCF803-0016 DCF803-0035 |
0.3 to 16A 0.3 to 35A |
110V -15% to 500V*/1-ph +10% single-phase or three-phase |
24 V DC 200 mA |
Line reactor required: – for 3 phase operation use KLR16BTB, KLR45CTB – for 1 phase, use ND-30 DCF803-0016, DCF803-0035 needs external fusing |
| FEX425-INT | 0.3 to 25A | |||
| DCF503B-0050 DCF503B-0060 |
0.3 to 50A 0.3 to 60A |
110V -15% to 500V**/1-ph +10% | 115 or 230 V |
Line reactor NOT required. (Internal line reactor included)
External fusing required |
| DCF504B-0050 DCF504B-0060 |
0.3 to 50A 0.3 to 60A |
110V -15% to 500V**/1-ph +10% | ||
| DCS800-S0x-xxxx-05 | 25 to 520 A | 200V. to 500V**/3-ph | Additional hardware components required for overvoltage protection (DCF506) |
Notes:
* Up to 600 Vac with auto transformer
** Up to 690 Vac with auto transformer
External Field Supply
DCF503B-0050, DCF503B-00601
- Single-phase operation
- Full-wave half-controlled thyristor/diode bridge (1-Q)
- Internal line reactor included
- Microprocessor control with the control electronics being supplied separately (115…230 V/1-ph)
- Construction and components have been designed for an insulation voltage of 690 VAC.
- Field Output voltage UA :
TOL = tolerance of line voltage in %
UV = Line voltage
UA = Field voltage
- Recommendation:
UA = 0.6 to 0.8 * UV or UV = 1.25 to 1.7 * UA
DCF504B-0050, DCF504B-00602
- Single-phase operation
- Full-wave fully-controlled regenerative thyristor bridge (4-Q)
- Internal line reactor included
- This unit offers field reversal as well as fast-response excitation / de-excitation In the steady-state condition. The full-wave bridge runs in half-wave mode so as to keep the voltage ripple at a minimum. With a quickly alternating field current, the bridge switches to fully-controlled mode.
- Same design as DCF503B
- Requires DCS800-DSL communications cable
- All external field supplies must be externally fused. See table below for selection
- DCS800-DSL communications cable required
External Field Supply AC Line Fuses
| Field Supply | Ifield | Fuse Single Phase | Fuse Three Phase |
| DCF803-0035, DCF503B-0050 or DCF504B-0050 | 6 Amps | FWP-10B | FWP-5B |
| 6 – 12 Amps | FWP-15B | FWP-10B | |
| 12 – 25 Amps | FWP-25B | FWP-25B | |
| 25 – 35 Amps | FWP-50B | FWP-30B | |
| DCF503B-0050 or DCF504B-0050 | 35 – 50 Amps | FWP-60B | – |
| DCF503B-00601 DCF504B-00602 | 50 – 60 Amps | FWP-70B | – |
- Transitioning to DCF803 -0050 and -0060 in 2013. Specifications remain the same.
- Transitioning to DCF804 -0050 and -0060 in 2013. Specifications remain the same.
DCS800 as Field Supply
The DCS800-S0X Drive Module can also be used for field exciter operation. An additional overvoltage protection unit is required. It provides field currents from 25 A up to 520 A unipolar and bipolar for field reversal function.
- Output voltage
UA respectively Udmax 2-Q : see table on page 5 - Recommendation:
Field voltage = 0.5 to 1.1 * UV - Overvoltage Protection Unit REQUIRED: The three-phase field supply converters DCS800- S01/S02 need a separate active Overvoltage Protection Unit DCF 506 for protecting the power part against inadmissibly high voltages.
Overvoltage Protection Unit Selection Chart
| Field supply converter for motor fields | Overvoltage protection |
| DCS800-S0x-0020-05 | DCF506-0140-51 |
| — | |
| DCS800-S0x-0140-05 | |
| DCS800-S0x-0200-05 | DCF506-0520-51 |
| — | |
| DCS800-S0x-0520-05 |
Specifications subject to change without notice.
ABB DCS800 DC Variable Speed Drives
