Basler Electric DECS-200 Digital Excitation Control System

One DECS-200 Digital Excitation Control System can accommodate 32Vdc, 63Vdc, or

125Vdc applications up to 15Adc. This unique flexibility provides precision control of

generators of virtually any size. The DECS-200 also incorporates a pulse width modulated

power stage, which improves system performances in non-linear load applications.

FEATURES

• Microprocessor-based design

• True RMS sensing, single or three phase

• 32Vdc, 63Vdc, and 125Vdc outputs at 15Adc

• 0.25% Voltage Regulation Accuracy

• Setup from front panel HMI or by PC with Windows® setup software included

• 20 standard stability selections

• User customizable stability selection

• Paralleling compensation

• Underfrequency compensation or V/Hz Ratio Limiter

• Soft start buildup

• Field Current Regulation Mode (Manual Mode)

• Autotracking between operating modes and between DECS-200 units

(optional)

• Minimum Excitation Limiter (Internally generated or customizable)

• On and off-line Maximum Excitation Limiters

• Stator Current Limiter

• Var and Power Factor Controllers

• Exciter Diode Monitoring (EDM)

• Sequence of Events Recording

• Oscillography

•Voltage Matching

•Eight (8) generator protection features

•Programmable output contacts

•Front panel backlit LCD display

•Front panel mounted RS-232 and side RS-485

communications ports

•Modbus™ protocol for RS-485 input allows

communications up to 4000 feet away

•<1% metering accuracy for 12 generator parameters

•Remote set point control via:

- Contact inputs

- Proportional control via ±10Vdc or 4-20mA

- Communications inputs RS-232 (ASCII) or RS-485(Modbus™)

•Meets C37.90.1-1989 for Surge Withstand and Fast Transient

•UL recognized, CSA certified, CE compliant, DNV certified,

GOST-R certified, Byelorussian certified

•U.S. Patent Number 5.294.879

DESCRIPTION

The microprocessor based DECS-200 is a total excita

tion control system in one enclosure. It contains all the

functionality necessary to limit, control, and protect a

generator from operating outside of the machine's

capability. A feature of DECS-200's sophisticated

design allows the nonactive control mode within the

unit to follow the active mode, permitting bumpless

transfer between modes. The optional external tracking

feature also allows for unit-to-unit communication,

permitting autofollowing and transfer between DECS

200 units. It can also communicate to a PC via the front

panel RS-232 port for local programming and metering,

and it can communicate via Modbus™ protocol via the

side RS-485 port for communications up to 4000 feet

away from the DECS-200 unit. The DECS-200 has all

the features, functionality, flexibility and programmabil

ity expected from a state-of-the-art microprocessor

based product.

APPLICATIONS

The DECS-200 is an excitation control system used to control 

the output voltage, vars or power factor of a synchronous

generator by varying or controlling the amount of dc excitation

applied to the generator's exciter field.

The DECS-200 is suitable for virtually any size machine.