Description
Core Product Summary (Brand / Model / Key Attributes)
The Alstom DFI-150-0003 is a Limelight Diagnostic Flame Indicator circuit board from the Alstom Limelight product line. It is a PCB-format diagnostic board used to monitor and indicate flame state in industrial combustion systems, with its principal application in Alstom gas turbine control systems, where flame detection is central to safe start-up sequencing and combustion monitoring.
The board is a rack/panel-mountable PCB assembly classified as an indicator/display unit, incorporating a digital readout for flame status presentation. It was manufactured under the Alstom brand (later ConverTeam Alstom) and is discontinued by the manufacturer, so it is handled in the service market as a spare or replacement board for maintaining existing turbine control installations. The unit weighs approximately 3 lb (about 1.4 kg).
Key Technical Specifications
| Parameter | Value |
|---|---|
| Product type | Diagnostic flame indicator circuit board (PCB) |
| Model | DFI-150-0003 |
| Product line | Limelight |
| Function | Flame state monitoring and diagnosis in industrial combustion systems |
| Indication | Digital readout |
| Application | Gas turbine control systems; industrial combustion monitoring |
| Manufacturer | Alstom (ConverTeam Alstom) |
| Weight | 3 lb (approx. 1.4 kg) |
| Status | Discontinued by manufacturer; available as spare/replacement board |
Detailed Product Overview
The DFI-150-0003 belongs to Alstom’s Limelight family of diagnostic flame monitoring equipment. In gas turbine installations, reliable confirmation of flame presence and quality is a fundamental protection function: the control system must verify light-off during start-up, sustain confirmation during loading, and detect flame loss quickly enough to initiate a safe trip. The DFI-150-0003 serves as the diagnostic and indication stage of that function — it processes the flame signal within the turbine control architecture and presents the flame state to operating and maintenance personnel through an onboard digital readout.
The board is implemented as a PCB circuit board assembly suitable for installation in the turbine control cabinet, consistent with the board-level spares strategy used for this generation of Alstom gas turbine control hardware. Its diagnostic orientation means it is used both in routine operation, where the readout gives operators a direct flame-status indication, and during troubleshooting, where flame signal quality issues — dirty scanner optics, flame instability, or signal conditioning faults — need to be isolated quickly to avoid extended outage time.
Because the board is discontinued by the manufacturer, replacement units are sourced from the legacy spares market, typically as new-old-stock or tested used boards. For plants running Alstom gas turbine fleets, holding a verified spare DFI-150-0003 is part of the standard overhaul and turnaround planning for the turbine control cabinet.
DFI-150-0003
DFI-150-0003
System Compatibility & Integration Requirements
| Item / Dependency | Verified Compatibility or Requirement | Practical Note |
|---|---|---|
| Host system | Alstom gas turbine control systems | Board is part of the Limelight flame monitoring chain in the turbine control cabinet |
| Function chain | Works with the turbine’s flame scanning/detection hardware | Verify the scanner and signal conditioning chain when diagnosing faults |
| Indication | Onboard digital readout | Provides local flame status to operations and maintenance staff |
| Installation | PCB circuit board format for control cabinet mounting | Power and signals are provided through the cabinet wiring/backplane |
| Spares sourcing | Discontinued product; new-old-stock or tested used boards | Confirm supplier functional testing before purchase |
Dimensions, Mounting & Connection Notes
- Format: PCB circuit board assembly for installation in the turbine control cabinet
- Weight: 3 lb (approximately 1.4 kg)
- Indication: front-side digital readout for flame status
- Connections: signal and power wiring per the cabinet’s board-level wiring scheme; verify against the installation documentation before replacement
- Handling: observe ESD precautions when handling the bare board; power down and isolate the control cabinet before removal or insertion
Engineering Selection Highlights
- Exact model match — specify DFI-150-0003 (DFI1500003) when sourcing; the Limelight line covers multiple flame monitoring products and the full numeric part number is the reliable identifier.
- Application scope — the board is designed for Alstom gas turbine control cabinets and industrial combustion systems with equivalent flame monitoring requirements; it is not a general-purpose flame detector but the indicator/diagnostic board of the control chain.
- Discontinued status — the board is no longer in production; plan spares acquisition (new-old-stock or functionally tested units) as part of turbine control overhaul scheduling.
- Board-level repair — flame indication faults in a Limelight-equipped cabinet are normally repaired by board exchange rather than component repair, so the spare should be functionally verified before it is put on the shelf.
- Digital readout — the onboard readout provides local flame status; confirm its role in the cabinet’s operator interface when defining maintenance procedures.
- Supplier verification — given the product’s age, obtain supplier confirmation that a replacement board has been functionally tested against flame signal conditions before installation.
FAQ
What is the Alstom DFI-150-0003?
It is a Limelight Diagnostic Flame Indicator circuit board from Alstom, used to monitor, diagnose, and indicate flame state in industrial combustion systems — principally in Alstom gas turbine control systems.
What does the board do in a gas turbine control system?
It processes the flame signal within the control chain and presents flame status through an onboard digital readout, supporting start-up flame verification, ongoing flame confirmation, and diagnostics.
What is the Limelight product line?
It is Alstom’s family of flame monitoring and diagnostic equipment, of which this board is a part.
Is the DFI-150-0003 still in production?
No. The board is discontinued by the manufacturer and is available through the legacy spares market as new-old-stock or tested used units.
Who manufactured the board?
Alstom; the part is also referenced under the ConverTeam Alstom brand, reflecting the later corporate organization of Alstom’s power conversion business.
How much does the board weigh?
Approximately 3 lb (about 1.4 kg).
How are flame indication faults repaired?
Typically by board-level exchange: the failed DFI-150-0003 is replaced with a verified spare, and the cabinet is returned to service after functional checks.
Verification & Troubleshooting Notes
- No flame indication during light-off: before suspecting the board, verify the flame scanner sight path is clean and correctly aimed, and that the scanner signal reaches the board — optics fouling is a common cause of false flame-loss indications.
- Intermittent or unstable indication: check the scanner cooling-air supply and the signal wiring between the scanner and the board; intermittent signals more often originate in the scanning chain than in the indicator board.
- Readout dark or erratic: verify board power at the cabinet wiring level; a dead readout with a valid flame signal points to a board-level fault requiring exchange.
- Suspected board failure: if a spare or equivalent channel is available, compare indications under the same combustion conditions to separate a board fault from upstream scanner or signal conditioning issues.
- After replacement: perform a functional flame check (light-off observation and a controlled flame-loss test where the operating procedure allows) to confirm the new board indicates correctly before returning the unit to automatic operation.
- Board removal and insertion must be performed with the turbine control cabinet powered down and isolated, following the plant’s control system work clearance procedures; observe ESD handling precautions throughout.
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