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Product Overview

The DECS-200-1L is a digital excitation control system for synchronous generators.
It regulates voltage, vars, or power factor by controlling DC excitation to the exciter field.
Compatible with multiple voltage configurations (32Vdc, 63Vdc, 125Vdc) and up to 15 Adc field current.
Ideal for power plants, industrial generators, and backup power systems.

Key Features

• Microprocessor-Based Design: Provides accurate, reliable control with advanced features
• Voltage Regulation: ±0.25% in AVR mode, ±1% in Field Current Regulation (FCR) mode
• Multiple Control Modes: Voltage, Power Factor, VAR, Field Current Regulation, auto-tracking between units
• Protection Features: Overvoltage, Undervoltage, Loss of Field, Stator Current Limiting, and more
• Advanced Communication: RS-232 and RS-485 ports, Modbus™ protocol, remote monitoring up to 4000 feet
• Sequence of Events & Oscillography: Capture critical operational data for diagnostics
• Backlit LCD Display: Real-time monitoring with intuitive navigation

Technical Specifications

Power Supply

• Control Power: 16–60 Vdc or 85–132 Vac, 50/60 Hz
• AC Operating Power: 1 or 3 phase input
• Field Voltage: 32Vdc, 63Vdc, 125Vdc
• Field Current: Up to 15 Adc

Voltage Sensing

• Generator: Single-phase or three-phase (100–600V)
• Bus Voltage: Single-phase line voltage, 100–600V

Inputs & Outputs

• Contact Inputs: 11 (Start, Stop, Var/PF Enable, etc.)
• DC Output Power: 32V, 63V, 125V
• Contact Outputs: 24Vdc (7A), 48Vdc (0.7A), 125Vdc (0.2A), 120/240 Vac (7A)

Communication Ports

• COM0 (RS-232, front panel), COM1 (RS-232, side), COM2 (RS-485 for Modbus™)

Protection Features

• Field Overvoltage: Adjustable 1–325 Vdc
• Field Overcurrent: 0–16 Adc
• Exciter Diode Monitoring: Detects open/shorted diodes
• Generator Over/Undervoltage: Adjustable 0–30 kV
• Loss of Field and Generator Loss Protection

Environmental & Mechanical

• Operating Temp: -40°C to +60°C
• Storage Temp: -40°C to +85°C
• Shock: 15 Gs, Vibration: 5–500 Hz at 1.2 Gs

Size & Weight

• Dimensions: 205 mm × 171 mm × 304 mm (8.08″ × 6.76″ × 12.0″)
• Weight: 14 lbs (6.35 kg)

Certifications

• UL (Std. 508), CSA (CAN/CSA-C22.2), CE (EMC/LVD)
• DNV Standard 2.4, GOST-R (Russia), Byelorussian certified

Applications

• Voltage and reactive power regulation for synchronous generators
• Industrial power plants, backup generators, and large-scale industrial systems
• Supports flexible operation and diagnostics for safe, efficient generator control

This DECS-200-1L system delivers precise excitation control, advanced protection, and comprehensive monitoring for generators of any size.

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