DIAM3100©2012 AUGIER SA.
I-26
I.7.3 OUTPUT LIGHTING ARRESTORS
This option consists of two lighting arrestors, which protect the CCR at each end of the loop. Current
discharge is conducted through the CCR’s main earth link, which must be of sufficient gauge.
If a particularly large current flow occurs (e.g. lightning strike directly on the loop cable), the lightning
arrestor can short-circuit itself permanently, thus creating an
“Earth fault”. In this case, the two lightning
arrestors must be replaced unconditionally.
I.7.4 CASTERS
CCRs is delivered with casters (2 uni-directional, 2 omni with brakes)
I.7.5 BURNT LAMP DETECTION:
This option determines the number of burnt lamps in the output load.
This is carried out by measuring the load Voltage versus Current phase shift.
Internal parameters of the data collection system must be re-initialised each time the loop is modified
(addition of transformers, replacement of transformers by more powerful ones, etc) or if any settings have been
changed (load adjustment, for example).
To increase the accuracy of the measurement, it is necessary to perform the calibration with
0
lamp
burned (1
st
stage) and
minimum 3%
of lamps burned (2
nd
stage).
Prior to performing the calibration, it is necessary to set the following parameter in the menu
“
Calibration
”:
The X number must be set in function of the total number of lamps in the loop to realize the calibration
(X can be set for 1 to 10 lamps).
Example: if the load loop is about 20 lamps, set the X parameter to 1 ( 1/20 = 5% > 3%).
Example: If the load loop is about 200 lamps, set the X parameter to 6 lamps. (6/200 = 3%).
Initialisation can be carried out in two stages:
1. The loop should be connected up to the CCR with
no
burnt lamp (all lamps are working).
Go into the “
Calibration”
menu then:
Press
OK
to start initialisation.
The message “
Wait please...”
blinks, meaning that data collection is in progress.
When the message stops flashing, data collection has been completed.
2. The loop should be connected up to the CCR with
X
lamp disconnected:
Go into the “
Calibration”
menu then
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