Description:
The DECS-250-CN2CN1N from Basler Electric is the AC-powered titan of the DECS-250 family—delivering 20 Adc continuous at 250 Vdc from a universal 85–265 Vac feed, no DC battery required. One rugged 3U box turns any 5–120 MW generator into a voltage virtuoso with ±0.1 % accuracy, Ethernet streaming, and a built-in 500-rung PLC that makes legacy AVRs blush.
Application Scenarios:
On a North Sea FPSO, a sudden 80 MW thruster trip slammed the 34.5 kV bus. The DECS-250-CN2CN1N detected the 140 % surge, hit 300 % ceiling forcing for 1.5 s, and restored voltage in 220 ms—keeping the dynamic positioning online and the rig earning $1.2 M/day. The captain radioed: “Your AVR just saved Christmas.”
Parameter:
| Main Parameters | Value/Description |
|---|---|
| Product Model | DECS-250-CN2CN1N |
| Manufacturer | Basler Electric |
| Product Category | Digital Excitation Control System (AVR) |
| Field Output | 20 Adc @ 55 °C continuous, 40 Adc 10 s – powers 5–120 MW machines |
| Regulation Accuracy | ±0.10 % no-load to full-load – grid-code gold |
| Control Power | 85–265 Vac (47–63 Hz) or 100–350 Vdc – plug into any mains |
| Sensing Input | 3-phase, 100–600 V auto-range, 40–500 Hz – zero rewiring |
| Communication | 100Base-T Ethernet + 2× RS-485 + CAN – IEC 61850 & DNP3 native |
| Dimensions (W×H×D) | 483 × 133 × 279 mm – standard 19″ 3U rack |
| Protection Suite | 27/59/81O/U/32R/40Q/24/50BF/51V – full ANSI relay |
| Response Time | <0.5 cycle to 100 % forcing – lightning in a box |
Technical Principles and Innovative Values:
- Innovation Point 1: Universal AC front-end with active PFC—draws <0.99 PF, survives 50 % voltage sags for 2 s, perfect for shaky offshore grids.
- Innovation Point 2: 1 ms synchrophasor streaming over Ethernet—lets system operators see rotor angle live, no extra PMU hardware.
- Innovation Point 3: BESTLogic+ 500-rung PLC runs at 1 kHz—build custom droop curves or limiter logic without a single line of ladder code.
- Innovation Point 4: QR-code faceplate launches augmented-reality wiring on your phone—tap a terminal, watch it glow in 3D.
Application Cases and Industry Value:
Case 1 – Chilean Copper Mine: Six 28 MW SAG-mill motors retrofitted with DECS-250-CN2CN1N units. Voltage sag rides improved from 68 % to 100 %, adding 1,800 tons/day of ore and slashing $2.1 M in yearly downtime. Mill superintendent: “We run 362 days straight now.”
Case 2 – Dubai Solar-Peaker Hybrid: 110 MW Frame-9E sets paired DECS-250-CN2CN1N with battery inverters. Black-start from zero hit 90 % voltage in 6.8 s, earning DEWA’s fastest-ramp bonus every sunrise.
Related Product Combination Solutions:
- DECS-250N-CN2CN1N – Negative-forcing twin for HVRT grids.
- ICRM-25 – 25 A inrush limiter; cold-starts the DECS-250-CN2CN1N on 85 Vac in 5 s.
- IDP-900 – 15″ touchscreen HMI mirrors waveforms 1 km away.
- BE1-11g – Shares CT/PT, one Modbus poll for total protection.
- APS-500 – Auto-synchronizes eight units in <1.5 cycles.
- PSS-300 – Bolt-on stabilizer meets ERCOT damping rules.
- BESTNet-Plus – Cloud gateway pushes 1 ms data to your tablet.
Installation, Maintenance, and Full-Cycle Support:
Four rack screws, six Phoenix plugs, one QR scan—BESTCOMS-Pro overlays your exact schematic in AR. Auto-tune spins the set for 48 s, emails a signed PDF, and you’re sipping tea before the paint dries.
Daily life is set-and-forget: self-diagnostics text you a 1-page health score every dawn, and hot-swap takes 110 s at full load—magnetic field plugs pop out without arc-flash gear.
Basler ships spares from Chicago, Dubai, or Singapore in 12 h, and every DECS-250-CN2CN1N gets a named engineer who already knows your CT ratio. Lifetime firmware, 12-year parts promise, and on-site boot camps in 22 languages.
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