Electric fire detection switches with thermal glass bulb or fusible link, wall mounting

Fire detection in buildings. This device operates electrical contacts for remote alarm and simultaneous control of electrical servo-controls such as electric cylinders, electric motors or solenoids, for opening or closing air conditioning dampers, doors, sunroofs, and openings in exterior building walls.

Contact Material

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Contact style

Voltage

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Electrical rating

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Release temperature (°C)

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Ingress protection

Mechanical protection

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Description

Applications

Fire detection in buildings. This device operates electrical contacts for remote alarm and simultaneous control of electrical servo-controls such as electric cylinders, electric motors or solenoids, for opening or closing air conditioning dampers, doors, sunroofs, and openings in exterior building walls.

Main Features

Thermal sensitive part: Thermo-breakable bulb or eutectic alloy link.

Operation: The break of the bulb or the melting of the fusible link activates, by means of a ceramic pusher, an electric switch.

Mounting: Enclosure with 4 removable legs, allowing mounting on the wall or ceiling. If the mounting is done on a particular board, removing the 4 legs on the back provides access to 4 M4 threads available for this purpose.

Orientation: The temperature-sensitive part (glass bulb or fusible link) is mounted on a stainless-steel support that can be rotated every 90° to position it in the most favourable direction to the air flow.

Electrical contact: Double snap action contact with two independent circuits, one normally open and the other normally closed. Total contact spacing is larger than 3mm, providing full disconnection upon IEC standards.

Electrical rating: 16A (4A) 250VAC; 10A (1A) 400VAC; 4A (100mA) 24 and 48VDC. Compatible with electric door magnets in 24V and 48V, 500 N.

(Version with gold plated contacts for low level electronic circuits available on request).

Enclosure: 70 x 80 x 45mm in UV resistant black PA66, with captive lid screws in stainless steel.

  • Flammability: UL94V0 and GWFI 960°C.
  • Deformation temperature under load: 225°C. (ISO 75-2, 1.8 MPa).
  • Ambient temperature class T150°C.
  • Resistance to corrosion better than 1000 hours in salt spray fog at 5%.
  • Ingress resistance: The highest class, IP69K (washable at high pressure hot water cleaner).
  • Impact resistance: The highest class, IK10 (except stainless steel support for temperature-sensitive parts and glass bulbs).

Electrical connection: On screw terminal block, 7 terminals 2.5mm². Shipped with a 3-way shunt and a 2-way shunt, allowing different contact and connection arrangement solutions. Cable outlet by two M16 cable glands.

Maintenance:

  • Replacement of the temperature-sensitive part can be made without tools
  • A test button (option) accessible from the outside allows to check instantly the operation of the switch without any disassembly or
  • The enclosure has holes for the installation of seals preventing unauthorized
  • Temperature sensitive parts may also be sealed to prevent unauthorized

Visualization: Optional 230 V, 24V or 48V pilot light. This pilot light can be used to visualize the presence of voltage on the line, a critical parameter for “contact closes on fire” detection systems.

Rod type sensor: This device, in the thermal bulb version, is also available with a rod-type sensor for wall- mounted air duct use (see type 59A8).

Other options: Customization and customer labelling. Output by a single cable gland.

Wiring diagrams

Contact opens when the device triggers.
Wiring in serial of devices whose contact opens when the device triggers.
Contact opens circuit 1 when the device triggers, and closes circuit 2 for alarm. The 2 circuits may have different voltages.
Contact closes when the device triggers.
Wiring in serial of devices whose contact closes when the device triggers.
Contact closes when the device triggers, with pilot light showing that power supply is on.
Connection in parallel of many devices with contact closes when the device triggers, with pilot light showing that power supply is on.
Serial connection of open on trigger contact (Circuit 1) and in parallel of close on trigger contact (Circuit 2). The 2 circuits may have different voltages.
Connection of many devices in serial of open on trigger contacts (Circuit 1) and in parallel of close on trigger contacts (Circuit 2). The 2 circuits may have different voltages.
Serial connection of open on trigger contact (Circuit 1) and in parallel of close on trigger contact (Circuit 2), with pilot light on circuit 2 showing that power supply is on. The 2 circuits may have different voltages.
Connection of many devices in serial of open on trigger contacts (Circuit 1) and in parallel of close on trigger contacts (Circuit 2), with pilot light on circuit 2 showing that power supply is on. (The 2 circuits may have different voltages).

 

Main references

Spare parts references*

Thermal glass bulbs for 59A7 (Packing units 50 and 250p) Eutectic alloy fusible links for 59B7 (Packing units 50 and 250p)
 

57°C (135°F)

 

6658GBB057

70°C (158°F),

non RoHS alloy

 

5E6070H080000000

68°C (155°F)  

6658GBB068

72°C (162°F),

RoHS alloy

 

5E6072H080R00000

 

79°C (174°F)

 

6658GBB079

92°C (198°F),

non RoHS alloy

 

5E6072H092000000

 

93°C (199°F)

 

6658GBB093

96°C (205°F),

non RoHS alloy

 

5E6072H096000000

141°C (286°F)  

6658GBB141

138°C (280°F),

RoHS Alloy

 

5E6072H138R00000

* Maintenance or replacement of thermal bulbs or fusible links must be made by specially trained personnel and in accordance with our technical instructions.

 

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Technical informations associated to this product

  • Historical and technical introduction of fusible alloys and fire safety fusible links

    The earliest known piece made of lead and tin alloy seems to be an Egyptian vase found in Abydos, dated around 1400 BC. During the Roman Empire, lead was used for the construction of water pipes. Melting at 325°C,
  • Temperature sensing principles

    The bimetal strip is formed by two co-laminated metal. One has a high coefficient of expansion, the othera lower or zero. When the strip is heated, it bends proportionally to the temperature. These bimetal blades are generally flat and fixed at one end. But they can be wound in a spiral shape, although this arrangement most often used in the construction of thermometers.
  • Electrical contacts

    As numerous mechanisms exist, we decided not to distinguish on the basis of constructive technique, but according to their operation speed, which is the key element.
  • Electrical protection classes

    The housings are designed to protect electrical equipment located inside. This protection must be considered in the electrical and environmental angles.)