BASLER DECS-250E Digital Excitation Control System

BASLER DECS-250E Digital Excitation Control System

The DECS-250E Digital Excitation Control System provides accurate and

reliable regulation, control, and protection for synchronous motors or

generators. Three DECS-250E models can supply a maximum of 50 Adc, 100

Adc, or 200 Adc of excitation current in a static or rotary exciter application. All

DECS-250E components are housed in a compact enclosure which makes for

a simple and cost-effective installation for a wide variety of applications

• Precise excitation control for synchronous generator or synchronous

motor applications.

• True RMS sensing, single-phase or three-phase voltage and current.

• Full generator or motor metering capabilities.

• Automatic Voltage Regulation / Field Current Regulation / Field Voltage

Regulation, Power Factor and var modes of operation.

• Integrated generator protection (27/59, 81O/U, 32R, 40Q), 59F, 51F, Field

Short Circuit, and 25 Sync Check.

• Load sharing over Ethernet.

• Auto tuning feature with two PID stability groups.

• Configurable protection.

• Conformal coating is applied to certain internal circuitry for additional

protection and reliability.

• Overexcitation limiting (with temperature compensation).

• Underexcitation limiting.

• Stator current limiting (with temperature compensation).

• Var limiting.

• Underfrequency limiting or V/Hz limiting.

• Trending, oscillography, and sequence of events recording.

• Ten programmable contact inputs.

• Nine programmable contact outputs.

• I/O expansion module compatibility.

- AEM-2020 Analog Expansion Module.

- CEM-2020 Contact Expansion Module.

• Single- or three-phase power input.

• Automatic synchronizer option.

• Compact enclosure.

• Reduce your setup time with Basler’s intuitive BESTCOMSPlus®

software that simplifies complex setup with simple drag-and-drop

programmable logic, visual real-time strip chart capabilities, and

cutting edge auto PID selection capabilities.

• The auto tuning function automatically establishes optimum PID

and gain settings, taking the guesswork out of system setup,

reducing commissioning time and cost while maximizing overall

system performance.

• The Offline Simulator in BESTlogic™Plus helps test and

troubleshoot logic without expensive hardware.

• A 50, 100, 200 ampere positive forcing rectifier bridge can be

selected to provide optimum response to the generator main field

Control Power Supply Input

Style LXXXXXXX

Voltage Range: 18 to 30 Vdc

Burden: 30 W*, 110 W

Style CXXXXXXX

DC Voltage Range: 90 to 150 Vdc

DC Burden: 30 W*, 100 W

AC Voltage Range: 90 to 132 Vac

AC Burden: 40 VA*, 150 VA

* With 50 Adc excitation current (style XXXXXXXA)

AC Operating Voltage and DC Output Power

120 Vac, 1-phase input: 63 Vdc output

80 Vac, 3-phase input: 63 Vdc output

240 Vac, 1-phase input: 125 Vdc output

160 Vac, 3-phase input: 125 Vdc output

320 Vac, 3-phase input: 250 Vdc output

Full Load Continuous

Current with Positive Forcing: 50, 100, or 200 Adc†

(style selectable)

† With 1-phase operating power input, 200 Adc styles

are de-rated to 133 Adc output.

10-Second Forcing: 1.44 x rated Adc

Power Input Frequency: 50/60 Hz

Generator Current Sensing

Configuration: 1-phase or 3-phase with separate

input for cross current

compensation

Current Ranges: 1 Aac or 5 Aac nominal

Frequency: 50/60 Hz Nominal

Burden: < 1 VA

Generator and Bus Voltage Sensing

Configuration: 1-phase or 3-phase

Voltage Ranges: 100/120 Vac ±10%

200/240 Vac ±10%

400/480 Vac ±10%

600 Vac ±10%

Frequency: 50/60 Hz Nominal

Burden: < 1 VA per phase

Inputs and Outputs

Contact Inputs: 10 programmable inputs

(dry contacts)

Auxiliary Input: Connection available in

4 to 20 mA or ±10 Vdc input

Output Contacts: 9 programmable form A

contacts and one form C for

watchdog function

Rating: Make, break, and carry 7 A

resistive @ 24/48/125 Vdc

(120/240 Vac).

Communication

USB: USB type B

RS-232: RS-232, 9 pin, sub D for

optional external autotracking

RS-485: Modbus® RTU protocol

CAN bus: One port for ECU communications

One port for expansion modules

Ethernet: 100base-T Modbus TCP protocol

for unit-to-unit communication

Expansion Port: Optional PROFIBUS protocol

Agency/Certifications

UL 6200:2019 recognized, UKCA, CE EMC, LVD, and