Digital fire detection control panel
LYON
FIRE PROTECTION MANUFACTURER
Ctra. de Molins de Rei a Rubí, Km. 8,4 - 08191 RUBÍ (Barcelona) ESPAÑA.
Tlf.: +34 935 862 690 - Fax:+34 936 999 261 - [email protected] -
www.cofem.com
11
EXAMPLE OF CALCULATION
An installation requires 136 A30XHAS sensors, 17 PUCAY manual call points and 18 addressable
sounders SIRAY with standard sound level.
It is known that installation requires 1 loop cable of 500 m with 2x1,5 mm
2
section, where the
nearest device to control panel is 50 m.
First, it is made calculation using table of device limits per control panel, with a Lyon control panel,
2x1,5 mm
2
section, and cable lenght
≤
500 m (for this case, cable lenght is 450 m). Following table is
obtained:
Devices in
installation
Elements
equivalence
according to table
Elements
consumption
Relays
equivalence
according to table
Relays
consumption
136 A30XHAS
1
136
-
0
17 PUCAY
1
17
-
0
18 SIRAY
6
108
1
18
TOTAL
171 Elements
-
261 Elements
-
18 Relays
Comparing these results with the boundaries of the control panel at the device limits of control panel,
we get:
Control panel Lyon
Calculation
RESULTS
Loop elements
consumption
199 261
199 < 261
→
EXCESS
Relays limits
32
18
32
≥
18
→
Ok
The limit of loop elements consumption of control panel is 199 elements. Calculation gets 261
elements, therefore, capacity of the loop is exceed.
Now, calculation will be accurately made by the software of loop elements capacity calculation.
500 m
loop
50 m
450 m
