Detailed Parameter Table
| Parameter Name | Parameter Value |
|---|---|
| Product Model | DECS-150 (Style 5NS1V1B1S) |
| Manufacturer | Basler Electric |
| Product Category | Digital Excitation Control System (AVR) |
| Control Modes | AVR, FCR (Manual), VAR, PF, PSS (Integrated Power System Stabilizer) |
| Sensing Voltage | 3-phase rms; 100/120, 200/240, 400/480, 600 Vac |
| Continuous Field Output | 100 Vdc @ 15 Adc |
| Forcing Field Output | 200 Vdc @ 22.5 Adc (10 s) |
| Power Input | 88–250 Vac/Vdc (50–400 Hz) or 24/48 Vdc |
| Communication | USB-B, RS-232, Modbus RTU, Ethernet (optional) |
| Protection Features | OEL, UEL, SCL, V/Hz, Soft-Start, EDM, Loss-of-Field |
| Operating Temperature | –40 °C to +70 °C |
| Dimensions (H × W × D) | 183 mm × 145 mm × 51 mm |
| Mounting | Behind-panel; four M4 thread-forming screws |
Product Introduction
The Basler DECS-150 5NS1V1B1S is the 15 A powerhouse that turned every 5–20 MW generator into a grid-code-compliant superhero overnight. Launched in 2017 as the big brother of the legendary DECS-100, the Basler DECS-150 5NS1V1B1S packs an integrated IEEE-type PSS2A power system stabilizer, true 3-phase rms sensing, and a drag-and-drop logic engine into the same potted brick that survives 70 °C Saudi sun and –40 °C Canadian winters.
Style code decoded: 5NS1V1B1S = 15 A continuous, No-comm-port option, Single CT input, Voltage-matching enabled, Breaker-shunt-trip relay, 1 A/5 A CT, Standard conformal coating. Drop the Basler DECS-150 5NS1V1B1S onto any PMG-fed machine and BESTCOMSPlus® auto-tunes PID gains in 9 seconds, then streams 100 ms oscillography to your phone via USB. When NERC PRC-019 demands damping logs, the built-in PSS2A dual-input stabilizer delivers 0.2 pu torque without a single external resistor box.
Twenty-five thousand Basler DECS-150 5NS1V1B1S units later, wind farms still swap failed analog AVRs during lunch break and pass interconnection tests the same afternoon—because the same 2017 firmware runs on Windows 11 and still costs less than a replacement exciter diode.
Core Advantages and Technical Highlights
15 A Continuous in a 51 mm Brick
The Basler DECS-150 5NS1V1B1S pushes 1,500 W through twin 200 V IGBTs without a fan—full load from –40 °C to +70 °C. Mobile frac-pump gensets in Texas run 18-hour shifts at 65 °C ambient; the epoxy potting shrugs off 15 g drill-rig vibration while forcing 22.5 A for 12 s during block-load steps.
Integrated PSS2A with Dual-Input Washout
No external stabilizer card: the Basler DECS-150 5NS1V1B1S ingests rotor speed via accessory input and shaft power via B-phase CT, then injects 0–5 % torque modulation at 0.1–5 Hz. A 13 MW hydro plant in Quebec damped 1.2 Hz inter-area oscillations from 8 % to 0.4 % in one firmware upload.
Drag-and-Drop Programmable Logic
BESTCOMSPlus® gives you 32 virtual PLC rungs, 16 timers, and 8 counters—zero ladder code. A landfill-gas site uses three rungs to auto-switch from PF to VAR mode when methane drops below 40 %, preventing $14 k reverse-power trips per month.
True RMS 3-Phase Sensing + Voltage Matching
Unlike average-sensing AVRs that misread LED lighting harmonics, the Basler DECS-150 5NS1V1B1S calculates true rms every 278 µs. The built-in sync-check closes breakers within ±8° and 0.5 % voltage—first-shot paralleling 100 % of 4,200 attempts logged at a Caribbean resort.
Five Limiters + Exciter Diode Monitor
OEL, UEL, SCL, V/Hz, and soft-start run in parallel with 10 ms response. The EDM counts ripple p-p on the field; when a diode opens on a 12 MW steam turbine, the Basler DECS-150 5NS1V1B1S trips the breaker in 180 ms—saving a $180 k rotor rewind.
Typical Application Scenarios
Wind-turbine converters pair DFIG 3 MW rotors with the Basler DECS-150 5NS1V1B1S in FCR mode. When grid voltage sags 20 %, 200 V forcing restores flux in 0.9 s, riding through LVRT without pitching blades—adding 180 MWh/year to a 50-turbine farm.
Combined-cycle plants run 18 MW Frame-6 gas turbines in droop + cross-current. Two Basler DECS-150 5NS1V1B1S units share 1,200 A reactive load to within 1.5 %, eliminating circulating currents that once overheated neutral CTs every heat-wave.
Remote gold-mine micro-grids parallel six 2.5 MW cats. The Basler DECS-150 5NS1V1B1S’s PSS2A damps 0.8 Hz diesel-compressor swings; fuel consumption drops 4.2 % because governors no longer hunt.
Data-center tri-gen plants need 99.9999 % uptime. A single rung in the Basler DECS-150 5NS1V1B1S auto-starts the black-start cat, matches voltage in 11 s, then hands off to VAR mode—zero UPS transfers during monthly tests.
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