AMFE Automatic Fire Extinguishing Unit for Electrical Cabinets

AMFE is an integrated automatic fire extinguishing unit designed for the protection of electrical cabinets, electrical systems and small electrical equipment, where direct access by people is often limited or not possible.

The system acts directly at the source of risk while the fire is still small. Due to its compact size, AMFE can be positioned close to the hazard interface and operates automatically 24/7 without requiring voltage supply.

Function:

AMFE uses a sprinkler glass bulb, which bursts when the activation temperature is reached. Once the glass bulb bursts, the extinguishing agent is released from the cylinder and the fire is suppressed at an early stage. The mechanism consists of the glass bulb, spring, needle and extinguishing agent cylinder.

Activation and Monitoring:

• AMFE: automatic thermal activation
• S-AMFE: monitoring of thermal activation
• R-AMFE: monitoring and remote activation
• R-AMFE can also be activated by an external activation current
• If remote activation fails, R-AMFE still operates by temperature in case of fire

Key Features:

• Suitable for electrical cabinets and small electrical equipment
• Suppresses fire directly at the source of risk
• Automatic thermal activation by sprinkler glass bulb
• Operates without voltage supply
• Monitoring and remote activation options, depending on the model
• Tested for vibration, environmental influences, temperature, humidity and lifetime stress

Extinguishing Agent:

• FK-5-1-12 agent
• Non-conductive
• Non-corrosive
• Non-toxic
• No residue after initiation
• Zero ozone depletion potential (0 ODP)
• Very low global warming potential

System Selection:

To choose the correct system, the protected volume and the required release head must be considered. The free volume is calculated by subtracting the volume of installed components from the total object volume to be protected.

The activation temperature must be selected according to the maximum temperature at the installation location. A reserve of 20 °C above the maximum ambient temperature at the installation site is recommended to avoid early release or mis-triggering.

Technical Data:

• Product type: Automatic fire extinguishing unit
• Application: Electrical cabinets and small electrical equipment
• Activation: Automatic thermal activation with sprinkler glass bulb
• Models: AMFE, S-AMFE and R-AMFE
• Extinguishing agent: FK-5-1-12
• Boiling point of FK-5-1-12 agent: 49 °C
• Cylinder series: 6 cylinder sizes in four variations
• Nominal internal pressure: approximately 34 bar at T = 20 °C
• Monitoring options: pressure gauge or electronic pressure sensor
• Electronic sensor signal: analog 4–20 mA
• Certification: VdS G 622002 for S-AMFE and R-AMFE with pressure gauge or pressure sensor