Product Overview
The Basler DECS250‑LN1CN1N is a full‑featured microprocessor‑based digital excitation control system for synchronous generators. It delivers high‑precision automatic voltage regulation, field current regulation, power factor and VAR control. Integrated generator protection, built‑in synchronizer, event logging and multiple communication interfaces enable stand‑alone or network‑connected genset operation. The LN1CN1N ordering variant features conformal coating for harsh industrial environments, suitable for utility, industrial and marine generator installations.
Series
DECS‑250 family includes multiple ordering variants differing by power stage, coating, communication and I/O options. It serves as an upgrade and drop‑in replacement for legacy DECS‑200 excitation controllers.
Product Features
- Multiple regulation modes: AVR, Field Current Regulation(FCR), VAR control, Power‑Factor control
- High‑speed PWM power stage, 15 Adc continuous excitation field output for fast transient responsemahsanat.c…
- True‑RMS single‑phase or three‑phase voltage and current sensing
- Integrated generator protection suite: over‑voltage, under‑voltage, over‑excitation, under‑excitation, loss of excitation, stator current limiting
- Built‑in automatic synchronizer for generator‑to‑bus paralleling
- Ethernet‑based load‑sharing for multi‑generator parallel operation
- Front‑panel LCD & keypad for local parameter setup, metering reading and alarm review
- Rich programmable digital inputs / relay outputs, watchdog fault relay output
- USB, RS‑232 and Ethernet communication ports for remote configuration and data logging
- Conformal coated PCB for enhanced humidity, dust and corrosive‑atmosphere resistance
- Auto‑tuning PID function with two stability setting groups
- Support for PMG, auxiliary winding or shunt‑type excitation power supply sourcesBasler Ele…
Product Parameters
表格
| Item | Parameter |
|---|---|
| Model | DECS250‑LN1CN1N |
| Continuous Field Output | 15 A DC |
| Sensing Voltage | 100‑600 VAC, 50/60 Hz |
| Sensing Current | 1 A / 5 A CT secondary |
| Control Power | 16‑60 VDC |
| Communication | USB‑B, RS‑232, Ethernet |
| Digital Inputs | 16 programmable contact inputs |
| Relay Outputs | 11 programmable Form‑A relays + 1 watchdog Form‑C relay |
| Contact Rating | 7 A resistive @24‑240 V |
| Mounting | Panel / chassis mounting |
| Coating | Conformal coated circuit board |
Product Specifications
- Operating Frequency: 50 Hz / 60 Hz
- Regulation Accuracy: High‑precision RMS voltage control
- Synchronizer: Anticipatory & phase‑lock synchronization modes with breaker‑closing time compensationManualsLib
- Software Tool: Basler BESTCOMSPlus configuration software
- Environment: Designed for generator control cabinet indoor installation, conformal coating for harsh ambient conditions
- Protection Functions: 27/59, 81O/U, 40Q, 32R, field short‑circuit protection and more ANSI protection elements
Functions
- Automatic Voltage Regulation (AVR): Maintain stable generator terminal voltage under variable load conditions
- Manual field‑current regulation (FCR) for commissioning and fault backup operation
- VAR and power‑factor control for parallel generator grid‑connected operation
- Built‑in synchronizer to match voltage, frequency and phase angle before generator breaker closure
- Comprehensive generator and excitation‑system fault protection with alarm outputs
- Real‑time electrical metering: voltage, current, power, power‑factor, excitation values
- Event log and fault data recording for post‑incident diagnostics
- Local configuration via front‑panel keypad‑LCD; remote setup & monitoring via communication interfaces
- Multi‑unit load‑sharing over Ethernet for paralleled generator systems
Purpose
Precisely control synchronous generator excitation current, stabilize output voltage, provide paralleling capability and equipment protection; replace analog AVR and older digital excitation controllers in generator control cabinets.
Application Fields
- Utility‑grade synchronous generator excitation control
- Industrial backup & combined‑cycle power generation plants
- Marine and offshore generator sets
- Cogeneration and grid‑parallel genset installations
- Retrofit upgrade & spare‑part replacement for Basler DECS‑200 / DECS‑250 series systems
- Independent power producer power stations
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