Basler Electric DECS-250N Digital Excitation Control System

Overview

The DECS-250N digital excitation control system offers high performance, high

flexibility, and extreme reliability for brushless excited AC synchronous generators.

The DECS-250N utilizes a 20-amp six-thyristor negative forcing output, providing

exceptional system transient response. Multiple communication options and an

optional integrated power system stabilizer make the DECS-250N a complete system

solution in a reliable and cost effective package.

Features

• Precise excitation control for synchronous generator or synchronous

motor applications.

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

• Full generator metering capabilities

• Auto tuning feature with two PID stability groups

• Reactive load sharing over communication

• AVR, FCR, FVR, power factor and var modes of operation

• Integrated generator protection 25. 27. 32R, 40Q, 51F, 59. 59F, 81O/U,

EDM, Loss of PMG, and field short circuit

• Optional integrated power system stabilizer (PSS), IEEE Std. 421.5 type

PSS2A/2B/2C

• 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

• Exciter diode monitoring

• Trending, oscillography, and sequence of events recording

• Fourteen programmable contact inputs

• Eleven programmable contact outputs

• Rated for up to 420 Hz on the power input with derating capability

(Contact Basler Electric for more information)

• I/O Expansion module compatibility:

-AEM-2020 Analog Expansion Module

-CEM-2020 Contact Expansion Module

Benefits

• The Offline Simulator, provided in BESTlogic™Plus, helps test and

troubleshoot logic without the need for expensive hardware.

• Reduce 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 revolutionary 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.

• A powerful 20-amp rectifier bridge provides high positive and

negative field forcing for exceptional system response. The

negative field-forcing capabilities make it well suited to be paired

with the optional Power System Stabilizer.

• Grid code settings provide compatibility with grid code compliant

systems.

• Easy user-configurable settings for synchronous motor or

generator modes of operation.