Sector Guide
Panel and Cabinet Suppression Systems Guide
Panel and cabinet suppression systems work on the principle that a polymer detection tube, filled to roughly 25 bar, bursts at around 100–110°C directly above a hot spot and triggers discharge on its own, without needing a separate electronic detector; this makes them well suited to localized, hard-to-access spaces such as electrical panels, CNC machine cabinets, wind turbine nacelles, and rail vehicle electrical compartments.
Panel and cabinet suppression systems work on the principle that a polymer detection tube, filled to roughly 25 bar, bursts directly above a hot spot at around 100–110°C and triggers discharge on its own, without needing a separate electronic detector. This simple but highly reliable mechanism makes them ideal for localized, tight, and hard-to-access spaces such as electrical panels, CNC machine cabinets, wind turbine nacelles, and rail vehicle electrical compartments.
How the Polymer Detection Tube Works
At the heart of the system is a flexible polymer tube, routed directly over the highest-risk components inside the protected panel or cabinet — contactors, busbar connections, power electronics. This tube is filled with extinguishing gas (or a pilot gas) to roughly 25 bar, and the tube itself serves as both the detection element and the distribution line. When overheating or an arc occurs, the tube wall softens and bursts at that exact point at around 100–110°C; this both marks the precise location of the fire and triggers the resulting pressure drop to initiate discharge directly. The key feature of this method is that detection happens exactly where the temperature is highest, with no electronic sensor lag.
Why No Separate Electronic Detector Is Needed
In conventional systems, a signal has to travel between separate components — detector, control panel, actuator, valve. In a panel suppression system, detection and triggering happen in the same physical element: the tube itself. This increases both simplicity and reliability, eliminating risks such as power loss, cable faults, or a loss of electronic detector sensitivity. That said, larger or more critical panels can add an electronic detector and control panel alongside the pilot-tube system to provide remote monitoring and alarm notification.
Typical Applications
| Application | Why it fits |
|---|---|
| Electrical and distribution panels | Arc risk at busbar connections and contactors can spread rapidly in a confined enclosure; the polymer tube captures that risk right at its source. |
| CNC machine cabinets | Provides localized protection in control cabinets where swarf, cutting-fluid vapor, and electrical components coexist. |
| Wind turbine nacelles | In these extremely difficult and costly-to-access spaces, a simple, low-maintenance detection-and-trigger mechanism offers a major operational advantage. |
| Rail vehicle electrical compartments | Preferred as a durable, low-maintenance solution under conditions of vibration and limited space. |
Discharge Agent Options
The agent used in a panel suppression system is chosen based on the panel’s size, voltage, and occupancy of the surrounding space. FM-200 and FK-5-1-12 (Novec 1230) are the most common choices, thanks to their compact cartridge sizes and electrically non-conductive properties; CO2 can also be used in larger panels or industrial applications where human access is tightly controlled, though CO2’s human-safety constraints still apply in these enclosed-cabinet applications as well (see “CO2 Safety Considerations”). Agent selection should weigh the panel’s location, how often maintenance staff access it, and applicable standard requirements together.
Agent options compared
| Agent | Key feature | Note |
|---|---|---|
| FM-200 | Compact cartridge, electrically non-conductive | Among the most common choices |
| FK-5-1-12 (Novec 1230) | Compact cartridge, electrically non-conductive | Among the most common choices |
| CO2 | Larger panels, industrial uses with controlled access | Occupancy restrictions still apply to cabinets |
To apply this guide to your project, see our gas fire suppression services and every system option on our home page, or contact us through the quote form.
Sources
Related Products
In-Cabinet Gaseous Suppression System
An in-cabinet gaseous suppression system is a compact unit installed directly inside an electrical panel or equipment cabinet, triggered by a pressurized polymer detection tube that bursts at roughly 100–110°C; it discharges FM-200, Novec 1230, or CO2 right at the heat source without needing a separate electronic detection system.
FM-200 (HFC-227ea) Clean Agent Suppression System
FM-200 (HFC-227ea) is a colorless, odorless, electrically non-conductive clean agent that discharges in under 10 seconds and extinguishes fire mainly by absorbing heat; with its design concentration calculated below human-safety limits, it can be used in occupied spaces together with a pre-discharge alarm and evacuation procedure.
FK-5-1-12 (Novec 1230) Clean Agent Suppression System
FK-5-1-12 is a fluoroketone-based clean agent that discharges in under 10 seconds and carries an exceptionally low environmental footprint (GWP of 1, atmospheric lifetime of about 5 days); because its design concentration is calculated below its NOAEL (10%), it can be used in occupied spaces together with a pre-discharge alarm and evacuation procedure.
CO2 Gaseous Fire Suppression System
A CO2 gaseous fire suppression system is a high-pressure total flooding system that extinguishes Class A, B, and C fires by lowering the oxygen level in an enclosed space below the point where combustion can continue; because that concentration is dangerous to breathe, CO2 is used only in unoccupied or evacuated spaces.
Related Solutions
Stand-Alone (Single-Zone) Inert Gas Suppression System
A Stand-Alone system is a self-contained, pre-engineered inert gas suppression package dedicated to a single zone or room, complete with its own cylinder bank, pipe network, control panel, and detection units.
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