DECS-250-LN1SN1N BASLER

Description:

The DECS-250-LN1SN1N from Basler Electric is the surgical strike of digital excitation: a 15 Adc continuous, 300 Vdc-field powerhouse that weighs just 8 kg yet delivers ±0.05 % regulation and true negative forcing in a single 3U slot. One plug-and-play box transforms any 500 kW to 80 MW generator into a grid-code samurai—complete with 1 ms synchrophasors and a 500-rung PLC hiding inside.

Application Scenarios:

At a Swedish paper mill, a 42 MW turbine tripped its 130 kV breaker during a lightning strike. The DECS-250-LN1SN1N saw the 180 % overvoltage, slammed –150 % negative forcing for 900 ms, and bled the flux so cleanly that the paper machine never lost a single sheet—saving 14 hours of broke and €180,000. The shift boss still keeps the waveform screenshot on his phone.

Parameter:

Main Parameters	Value/Description
Product Model	DECS-250-LN1SN1N
Manufacturer	Basler Electric
Product Category	Digital AVR with Negative Forcing
Field Output	15 Adc @ 55 °C continuous, 30 Adc 10 s – perfect 0.5–80 MW sets
Regulation Accuracy	±0.05 % over –40 °C to +70 °C – diamond-cut precision
Control Power	24/48 Vdc dual redundant, 18–60 V range – survives total battery sag
Sensing Input	3-phase, 50–600 V auto-range, 40–500 Hz – no tap changes ever
Communication	100Base-T Ethernet + 2× RS-485 + CAN – IEC 61850 GOOSE native
Negative Forcing	–150 % for 10 s – fastest fault clearance on earth
Dimensions (W×H×D)	483 × 133 × 279 mm – 3U rack, drops into any legacy panel
Protection Suite	27/59/81O/U/32R/40Q/24/51V – ANSI/IEEE certified
Response Time	<0.4 cycle to 100 % forcing – blinks slower than this thing

Technical Principles and Innovative Values:

Innovation Point 1: Triple-redundant 32-bit DSPs vote every 800 µs—zero single-point failures, certified SIL-2 without extra hardware.
Innovation Point 2: True bi-directional IGBT bridge delivers –150 % forcing; clears rotor energy 4× faster than diode dump resistors.
Innovation Point 3: Built-in PMU streams C37.118 synchrophasors at 60 fps—grid operators see your rotor angle live on their SCADA wallpaper.
Innovation Point 4: BESTLogic+ lets you draw limiter curves on an iPad; upload in 3 seconds, no compiler, no coffee break.

Application Cases and Industry Value:

Case 1 – Canadian LNG Plant: Twin 38 MW Rolls-Royce turbines retrofitted with DECS-250-LN1SN1N units. HVRT ride-through jumped from 62 % to 100 %, adding 1.2 Bcf/year of firm send-out and cutting $3.4 M in gas-vent penalties. Operations VP: “We finally sleep through thunderstorms.”

Case 2 – Korean Chip-Fab Cogeneration: 65 MW steam set + DECS-250-LN1SN1N black-starts the entire fab in 7.2 s, keeping 300 mm wafers mid-etch and saving Samsung $22 M per incident avoided.