Description
Product Overview
The Basler DECS-200-2L is a microprocessor-based digital excitation regulator (AVR) built for synchronous generators used in power utilities, industrial powerhouses and marine power systems. This dual-channel model employs PWM power stage technology to precisely adjust exciter field current, controlling generator terminal voltage, reactive power and power factor. It integrates multi-limiter protection logic, sequence of event recording (SER) and oscillography for fault analysis. The unit supports front-panel HMI local setup and PC configuration via BESTCOMS™ software. DECS-200 series is end-of-manufacture, and DECS-200-2L is widely stocked as critical spare for existing generator excitation retrofit and maintenance.
Technical Specifications
| Parameter | Details |
|---|---|
| Part Number | DECS-200-2L |
| Manufacturer | Basler Electric |
| Product Category | Digital Excitation Controller / AVR |
| Architecture | Dual redundant control channels |
| Sensing Input | Single or 3-phase True RMS voltage sensing, 120–480 VAC, 50/60Hz |
| Excitation Field Output | 32 VDC / 63 VDC /125 VDC selectable; 15 A continuous, 30A for 10s forced excitation |
| Voltage Regulation Accuracy | ±0.25% |
| Control Modes | AVR voltage regulation, field current manual mode, VAR / power factor control |
| Limiters & Protection | OEL, UEL, V/Hz limiter, loss of sensing, overvoltage, undervoltage, exciter diode monitoring (EDM) |
| Communication | RS232 front port, RS485 Modbus RTU |
| Configuration Tool | BESTCOMS™ Windows software, local front-panel LCD HMI |
| Mounting | Panel cutout mounting |
| Operating Temperature | -40°C ~ +70°C |
| Storage Temperature | -40°C ~ +85°C |
| Relative Humidity | 5% ~95% non-condensing |
| Approximate Weight | 1.6 kg |
Compliance & Certifications
- CE mark compliant with EMC and Low Voltage Directive
- DNV marine certification
- RoHS compliant
- Factory full power-on test, regulation loop test, protection function and communication verification before shipment
Storage & Installation Guidelines
Storage Requirements
- Store in dry temperature-controlled warehouse; recommended ambient 10°C ~30°C, RH <70% non-condensing
- Remain sealed inside original packaging before installation
- Protect from mechanical shock, continuous vibration, dust and corrosive vapors
- ESD wristband required when unpacking and handling
Installation Instructions
- Perform lock-out/tag-out and fully de-energize generator PT/CT circuits and control power supply
- Wear ESD protective gear to prevent electrostatic damage to circuit components
- Install unit into control cabinet panel cutout and fasten mounting hardware
- Wire voltage sensing inputs, exciter field output, auxiliary control supply and communication cables strictly per Basler wiring diagram
- Connect PC via RS232 and use BESTCOMS™ to load generator parameters, tune PID gains and configure limiters
- Restore power, perform no-load voltage build-up test
- Complete generator paralleling test, VAR control check and protection function simulation; commissioning must be completed by certified generator excitation technicians
FAQ
Q: What is DECS-200-2L used for? A: It is a digital AVR excitation controller to regulate terminal voltage and reactive power of synchronous generators for utility, industrial and marine power generation.
Q: What software configures this regulator? A: BESTCOMS™ PC software, and local parameter setting available via front panel HMI.
Q: What excitation output options does it support? A: It supports 32VDC, 63VDC and 125VDC field output with 15A continuous rating and 30A short-time forced excitation.
Q: Is this a dual-channel redundant model? A: Yes, DECS-200-2L features dual control channels for higher reliability on critical generator assets.
Q: What warranty is available? A: Standard 12-month warranty applies for fully tested units operated under rated normal operating service conditions.
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