M+D Electrical Distributors (1995) Ltd

Rate of Rise Heat Detector and Base

The Rate of rise heat detector is designed to provide early warning of a fire condition reacting upon a sensitive rate of rise in temperature or upon reaching a fixed temperature threshold.

Features:

• Supply voltage     - 22,5 (±7.5) VDC     
• Average current consumption in quiescent state     - 40 µ at 22,5 V DC     
• Alarm state current (with a DB-2 type base)     - 50 (± 2) mA at 22,5V DC     
• Sensitivity – according EN54 /5 Standard     -Class A1R (Table 2)     
• Period of transition from quiescent to alarm     - according to EN54 /5     
• Permanent magnet test option     -available     
• Connection to fire control panel     -two wire     
• Remote indicator option     -available     
• (connection is made through a build in 1k resistor)         
• Level of protection     - IP 30     
• Operational temperature range     - minus 10°! / plus 90°!     
• Protected area     - 35 m2 at 3,5 m height     
• Relative humidity resistance     -(92 +3 -3)% at 40°!     
• Dimensions (with a DB-2 type base)         
•  - diameter    -∅106 mm ;     
•  -height     - 48 mm.     
• Weight (incl. base)     - 0,145 kg     

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