46
ID-E270-011GB
detection line section located between these elements. It is not recommended to design detection
lines with branches as a break or short circuit in a side line results in disconnection of the elements
located between the fault and the end of a given branch, regardless of whether or not the line
operates in a loop system. If it is necessary to create a branch, it is recommended that only a few line
elements are installed in the branch (i.e. fewer than a dozen or so).
Fig. 6.1 POLON 4900 control panel addressable detection line examples
The detection lines in the POLON 4000 system should be routed in the following manner:
-
radial lines without branches;
-
loop-shaped lines may have single branches but two neighbouring branches should be
separated by at least one addressable element.
This line routing method enables the automatic addressable elements configuration.
While designing addressable detection lines, the following program and electric requirements must
be taken into account:
