Basler DECS-400 Instruction manual - Specifications, Continued

DECS-400 Digital Excitation Control System

3

SPECIFICATIONS, continued

Generator Current Sensing Single or three phases; separate cross-current compensation input. 1 A ac or 5 A ac

nominal.

Sensing Burden

Voltage:

Field Voltage and Current Field current and voltage values are provided by the Isolation Module.

Isolation Module

Power +5 Vdc, ±12 Vdc from DECS-400.

Five field voltage sensing ranges: 63 Vdc, 125 Vdc, 250 Vdc, 375 Vdc, and 625 Vdc

Output: 0.9-9.1 Vdc (5.0 Vdc = zero field volts)

Two nominal shunt ranges: 50 mVdc and 100 mVdc

Output: 2.0-9.5 Vdc (2.0 Vdc = zero field current)

Contact Inputs

Sixteen contact inputs accept dry switch/relay contacts or open-collector outputs from a PLC. There are six fixed-

function contact inputs and 10 programmable contact inputs. Interrogation Voltage: 12 Vdc.

Fixed Function Inputs

  • AVR*

• FCR*

  • Lower**

• Raise**                  • Start*

• Stop*

*Functions activated by a momentary input.

**Functions active only when corresponding contact input is active.

Programmable Inputs

Any of the 10 programmable inputs can be programmed with the following functions. However, these are normally

preassigned by selecting one of the preprogrammed logic schemes.

• 2nd PID settings

• Pre-Position

• Reactive Droop Compensation Enable

• PSS Enable

• PSS Motor Pump/Generator Mode

• PSS Parameters Set Selection

• Phase Rotation

• Unit/Parallel Operation (52 L/M)

• Var/Power Factor Enable (52 J/K)

• Secondary Enable

• Reactive Differential Compensation Enable • 2nd Pre-Position

Accessory Input (Remote Set Point Control)

Analog input for remote set point control. Select one of two configurations: ±10 Vdc or 4-20 mA dc.

Control Outputs

Isolated analog output for set point control. Output drives external Firing Circuit/Rectifier Bridge. Select one of

three configurations: ±10 Vdc, 0-10 Vdc, or 4-20 milliamperes dc

Meter Drivers

Two programmable 4 to 20 mA analog meter drivers. Meter side isolated from DECS-400. Programmable to meter

field voltage or current, generator voltage or current, bus voltage, generator or bus frequency, active power,

reactive power, apparent power, power factor, field temperature, tracking error, position indication and PSS

parameters. 64 selectable parameters in all.

Contact Outputs

Two dedicated contact outputs and six programmable contact outputs.

Make 30 A for 0.2 seconds per IEEE C37.90; Carry 7 A continuous. Break (Resistive or Inductive) 0.3 A at 120 Vdc

or 250 Vdc (L/R = 0.04 maximum)

Dedicated Outputs

Programmable Outputs

(All programmed through integrated logic; however,

• Watchdog

• DECS-400 Status

they are normally preassigned when using one of the

  • On/Off

• Active Limiter Functions

pre-programmed logic schemes.)

• Active Alarms

• Active Protective Functions

Communication Ports

COM 0

RS-232 front panel female DB-9, 1200-19200 Baud, 8N1 Full Duplex, ASCII commands

COM 1

RS-485 rear panel screw terminals, 4800-19200 Baud, 8N1 Half Duplex, ASCII commands

COM 2

RS-485 rear panel screw terminals, 4800-19200 Baud, 8N2 Half Duplex, Modbus™ protocol

J1

FCC Part 68 approved modem, rear panel RJ-11

RJ-45

Ethernet, Modbus TCP Protocol, 10 base T