A raging fire can consume almost anything. Electrical installations pose a particular threat. Wire insulation will easily burn during a fire, but water or foam used to extinguish conducts electricity. An additional threat to the firefighting team would significantly limit their ability to act. Therefore, it is mandatory to install fire protection switches. What are they, how do they work and where should they be placed?
Check fire protection switches at the Onninen wholesaler
Fire protection switch - principle of operation
The operation of fire protection switches is based on monitoring environmental parameters and appropriate sensors. When the system detects a fire or other fault, the fire extinguisher responds by interrupting the electrical circuit. A small button, placed behind the glass in a red casing, visible from a distance, is visible immediately after entering the building. In some models, breaking the glass is enough to activate the protection. In others you have to press a button. In either case, the fire extinguisher completely cuts off the electricity to most systems. Even in the event of a failure of one phase, the device will automatically switch to power supply from another phase.
Technical solutions of fire protection switch. electricity - emergency and guaranteed power supply
Why does a fire protection switch cut off power only to most systems? It would seem that safety requires completely cutting off power to all devices without exception. However, after further consideration, it is easy to identify systems that must be powered primarily during fire brigade operations:
-
Emergency lighting, enabling efficient movement around the building, especially in corridors without access to windows. - Power supply for fire pumps, ensuring the appropriate amount of water for the fire unit.
- Operation of fire ventilation, discharging smoke away from the facility.
- In the case of hospitals, this will also include life support systems, especially if no evacuation has been ordered.
These exceptions are dictated by the nature of operation of the mentioned devices. Turning them off would cause more difficulties during the action, so the effect would be counterproductive.
How to connect a fire button?
About how to install a fire switch. decided by the Regulation of the Minister of Infrastructure of April 12, 2002 on the technical conditions to be met by buildings. In accordance with the above-mentioned regulations, a fire alarm button should be installed at the entrance to the building. If there are several such inputs, each of them should have its own power switch.
Additionally, they must be marked with two signaling diodes. Red indicates that the network is supplied with electricity (normal operation), while the green diode confirms that the button has been activated and the power has been cut off. If both lights are off, electricity is not reaching the button itself (power grid failure or power cut at the main distribution box).
Fire protection switches at the Onninen wholesaler
What type of fire button is best to buy? The Onninen electrical wholesaler offers several interesting variants that may interest you.
Fire protection switch Spamel PWP1-W01-A-11-2LED7/M
First, a classic, popular solution, i.e. a type A button - fire protection switch. Spamel PWP1-W01-A-11-2LED7/M is activated by breaking the glass. It also has two LEDs indicating the network status. Also noteworthy is the IP65 protection level of the housing and the mechanical durability of the device, which prevents accidental breaking of the glass.
Fire protection switch Spamel PWP1-W01-B-11-2LED7
A similar version of the above-mentioned button is the fire button. Spamel PWP1-W01-B-11-2LED7 . It also has a high degree of protection of the IP65 housing and two signaling diodes. However, in this case, breaking the glass does not mean cutting off the power to all devices. It is necessary to press the button additionally. This reduces the chances of accidentally pressing the button.
EATON M22-SOL-PVLPL11-230Q fire protection button
The fire protection button has a different design. from EATON . It is a knob protected by a plastic housing. The EATON M22-SOL-PVLPL11-230Q PV fire button has two pairs of contacts: make and break. This means that pressing the button can cut off the power to the entire building and simultaneously activate the fire alarm. It has a protection class of IP65 and is resistant to unauthorized manipulation (accidental activation).
Replacement lens with Cooper arrows
In case of fire, it is necessary to break the glass in the device. However, once the fire is extinguished, they can be restored to normal by replacing this element. However, appropriate replacements must have high mechanical strength and a high housing protection class (min. IP65). Replacement Cooper lenses allow you to repair the fire protection switch so that you can use it in the event of another unpleasant surprise.