ABB DCS800 DC Variable Speed Drives

Low voltage DC drives

ABB DC Drives
DCS800, 10 to 4000 hp

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):

ABB DCS800 Field Output voltage (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):

ABB DCS800 Field Output voltage (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 :

ABB DCS800 External Field Supply Output voltage (Single-phase operation)

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
  1. Transitioning to DCF803 -0050 and -0060 in 2013. Specifications remain the same.
  2. 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

 


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Specifications subject to change without notice.
ABB DCS800 DC Variable Speed Drives
Power and productivity for a better world, ABB

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