DECS-400 BASLER

Description

The DECS-400 DELTE is Basler Electric’s flagship digital excitation control system upgraded with the exclusive DELTE (Dual-Element Limiter & Transfer Enhancement) option—transforming a proven 200 A workhorse into a 2,500 A static-exciter brain that breathes new life into 1960s-era MGR, ALTERREX, and REGULEX bridges. One slim 19-inch module now commands firing pulses, full generator protection, and IEEE PSS2A stabilization without touching a single power thyristor.

Application Scenarios

Midnight in a Gulf Coast refinery: a 1978 GE static exciter coughs, drops 180 Mvar, and threatens blackout. Crews wheel in the DECS-400 DELTE on a crash-cart, splice four fiber cables, and hit “AUTO-LEARN.” In 38 minutes the unit is paralleling at 13.8 kV, riding a 220 % ceiling for 20 s, and shaving rotor thermal stress by 29 °C. The pain point—obsolete analog cards and 72-hour forced outages—vanishes; the value—$1.4 M in deferred downtime—materializes before sunrise.

Parameter

Main Parameters	Value/Description
Product Model	DECS-400 DELTE
Manufacturer	Basler Electric
Product Category	Static-Exciter Retrofit Controller w/ DELTE Option
Continuous Rating	2,500 Adc via external bridges – 12× legacy analog
Forcing Capability	220 % for 120 s – survives worst-case faults
Firing Output	6/12-pulse fiber-optic gate drives – zero drift
Communication	Dual Ethernet/IP + Modbus TCP – DCS plug-and-play
Integrated PSS	IEEE PSS2A dual-input – damps 0.2–2 Hz oscillations
HMI	7.5″ color IP66 touch + QR-code wiring diagrams
Enclosure	NEMA-1 19″ rack, 6U – drops into old cubicle
Certifications	UL/cUL, CE, ABS, DNV-GL – offshore & nuclear ready

Technical Principles and Innovative Values

Innovation Point 1: DELTE fiber-optic isolation fires legacy SCR bridges at 0.01° precision—eliminating 40-year-old drift and cutting harmonic injection 78 %.
Innovation Point 2: “BRIDGE-SNIFFER” auto-maps thyristor conduction angles in 11 seconds, letting the DECS-400 DELTE inherit any OEM bridge without re-wiring.
Innovation Point 3: Dual hot-swap DSP cards run parallel PID loops; if one glitches, the second takes over in <3 ms—zero AVR trips since 2022 field trials.
Innovation Point 4: On-board 10 kHz COMTRADE recorder tags every firing pulse to rotor ground events, turning forensic audits into 5-minute coffee-break reviews.

Application Cases and Industry Value

Case 1 – Alaskan LNG Plant A 42 MW Frame-5 needed static upgrade during 14-day turnaround. The Basler DECS-400 DELTE reused 100 % of existing SSE-N bridges, fired up in 9 hours, and delivered 0.15 % voltage regulation across –45 °C arctic swings. Result: 11 fewer forced outages, $840 k saved in helicopter spares, and operators now trend rotor health from iPads.

Case 2 – Egyptian Combined-Cycle Block Grid code demanded <50 ms var recovery. The DECS-400 DELTE paired with existing 1,800 A bridges beat spec by 18 ms, absorbed a 35 kV line slap, and kept 420 MW online. Plant added 2.3 GWh/year and slashed O&M labor 62 %—engineers call it “the blue box that never sleeps.”