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Basler DECS-150 - User Manual

Basler DECS-150
250 pages
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12570 Route 143 Highland, Illinois 62249-1074 USA
Tel +1 618.654.2341 Fax +1 618.654.2351
www.basler.com info@basler.com
Publication
9492600990 Rev H
Sep 2021
DECS-150
Digital Excitation Control System
Instruction Manual
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Basler DECS-150 Specifications

General IconGeneral
BrandBasler
ModelDECS-150
CategoryControl Systems
LanguageEnglish

Summary

Introduction

Applications

Describes the DECS-150's intended use for brushless AC synchronous generators/motors.

Features and Functions

Lists the key capabilities of the DECS-150, including control modes, protection, and communication.

Front Panel

Front Panel Illustration and Description

Illustrates and describes the DECS-150 front panel indicators, layout, and USB port.

Power Input and Output

Operating Power

Details the required operating power voltage, frequency, and sources for the DECS-150.

Power Output

Describes the excitation power output capabilities of the DECS-150.

Voltage and Current Sensing

Machine Voltage

Explains machine voltage sensing inputs, connections, and transformer configurations.

Machine Current

Describes machine current sensing inputs, CT compatibility, and connection details.

Bus Voltage

Explains bus voltage sensing inputs and connections.

Regulation

Regulation Modes

Details the four available excitation control modes: AVR, FCR, Var, and Power Factor.

Protection

Voltage Protection

Covers undervoltage, overvoltage, and loss of sensing protection functions.

Frequency Protection

Details overfrequency and underfrequency protection settings.

Field Protection

Details exciter field current limit, overvoltage, and diode monitoring.

Limiters

Overexcitation Limiter (OEL)

Monitors and limits field current to prevent overheating, with online and offline settings.

Underexcitation Limiter (UEL)

Limits excitation to prevent end-iron heating and loss of synchronism.

Stator Current Limiter (SCL)

Limits stator current to prevent overheating by adjusting excitation.

Grid Code

Configuration

Settings for DECS-150 compatibility with grid code compliant systems.

Active Power Control (APC)

Manages generating unit ramp rates and output for grid code compliance.

Reactive Power Control

Describes five modes for controlling reactive power output based on voltage or power.

BESTCOMSPlus Software

General Description

Overview of the BESTCOMSPlus PC application for configuring, monitoring, and managing the DECS-150.

Installation

Provides instructions for installing the BESTCOMSPlus software and DECS-150 plugin.

Settings File Management

Explains how to save, upload, and download DECS-150 settings and logic files.

BESTlogicPlus

Overview of BESTlogicPlus

Describes the programming method for DECS-150 logic, including objects, composition, and simulators.

Logic Schemes

Defines system operation through equation-based logic variables.

Communication

USB Communication

Details local communication via USB port for configuration and commissioning.

Modbus Communication

Details the Modbus TCP protocol, message structure, modes, and parameters.

Configuration

Operating Mode

Allows setting the unit's operating mode to generator or motor.

Machine, Field, and Bus Ratings

Configures equipment ratings for accurate excitation control and protection.

Security

Password Access

Establishes usernames and passwords to control access to DECS-150 operations.

Timekeeping

Time and Date Format

Configures time and date display conventions and time zone offsets.

Backup Battery for the Real-Time Clock

Describes the backup battery for maintaining clock function during power loss.

Testing

Real-Time Metering Analysis

Enables performance testing and monitoring of AVR and PSS via live data plots.

Step Response Analysis

Verifies overall system response by applying step changes to setpoints.

Modbus Communication

Introduction

Describes the Modbus communications protocol employed by DECS-150 systems.

Modbus Modes of Operation

Explains Modbus TCP communication modes and security requirements.

Maintenance

Preventive Maintenance

Covers periodic checks for clean connections, capacitor care, and front panel cleaning.

Storage

Provides guidelines for storing the DECS-150 in a moisture and dust-free environment.

Troubleshooting

Communications

Troubleshooting steps for issues with BESTCOMSPlus or USB communication.

General Operation

Addresses common operational problems like voltage buildup and output stability.

Poor Voltage Regulation

Diagnoses and resolves issues related to poor voltage regulation.

Specifications

Operating Power

Details voltage, frequency, and burden requirements for operating power.

Machine Protection Functions

Specifies pickup and time delay for voltage, frequency, and field protection.

Environment

Details operating range for temperature, humidity, salt fog, and elevation.

BESTCOMSPlus Settings Loader Tool

BESTCOMSPlus Settings Loader Tool Installation

Details the installation process for the BESTCOMSPlus Settings Loader Tool.

Loader Grid

Manages product settings files and their associated bar codes.

General Operation

Provides general usage guidelines for the settings loader tool.

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